{"title":"Home page","description":"","products":[{"product_id":"neuron","title":"neuron necklace | silver","description":"\u003ch2\u003eNeuron necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe human brain holds roughly 86 billion neurons, each firing through the same basic architecture: cell body, dendrites, axon, synaptic terminals. The unit that took most of the twentieth century to understand and now anchors most of neuroscience. Worn here as a 39 mm sterling silver pendant.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Neuron\u003c\/h2\u003e\n\u003cp\u003eThe neuron doctrine, the principle that the brain is composed of discrete cellular units rather than a continuous reticulum, was settled by Santiago Ramón y Cajal's silver-staining studies in the 1880s and 1890s. Cajal's silver impregnation revealed individual neurons in cortex, cerebellum, retina, and spinal cord, settling a long debate with Camillo Golgi (who maintained the reticular theory). The two shared the 1906 Nobel Prize in Physiology or Medicine. Each neuron computes through dendritic input integration, cell-body summation, and axonal action potential propagation, with myelination by oligodendrocytes (CNS) or Schwann cells (PNS) speeding conduction. Synapse counts in the human cortex run between 10¹⁴ and 10¹⁵. The diversity is enormous: pyramidal cells, interneurons, motor neurons, sensory neurons, Purkinje cells, granule cells, each tuned to a particular computational role.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eneuroscientists across systems, cellular, molecular, and computational subfields\u003c\/li\u003e\n\u003cli\u003eneurologists and clinical neuroscience trainees\u003c\/li\u003e\n\u003cli\u003emedical and graduate students learning the neuron doctrine and synaptic transmission\u003c\/li\u003e\n\u003cli\u003escience communicators and educators teaching brain biology\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who knows that Cajal's silver-staining method is part of why the silver version reads cleanly here, and for whom the neuron is the unit that frames an entire field rather than just a textbook image.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Neuroscience Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-18k-gold-plated\"\u003eNeuron necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-earrings\"\u003eNeuron earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell\"\u003ePurkinje cell necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spindle-neuron\"\u003eSpindle neuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/sagittal-brain-18k-gold-plated\"\u003eSagittal brain necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is silver the right material for a neuron pendant?\u003c\/h3\u003e\n\u003cp\u003eBeyond aesthetic preference, the silver version carries a quiet methodological link. Cajal's 1873 silver-staining technique, developed to visualise individual neurons, made the neuron doctrine possible. The whole modern picture of the brain as a network of discrete cells rests on a metallic stain. The silver pendant catches that history without leaning on it. Buyers in working neuroscience tend to recognise the link without needing it explained.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs the neuron pendant for any specific subfield?\u003c\/h3\u003e\n\u003cp\u003eIt works across most of neuroscience because the cell type is the foundational unit. Cellular neuroscientists and electrophysiologists buy it as a working reference. Systems and cognitive neuroscientists buy it as the iconic image of the field. Clinical neuroscientists and neurologists buy it as the molecular substrate of the conditions they treat. Educators buy it because the neuron is the first thing a student learns and the last thing they forget.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 39 mm pendant on a 45 cm sterling silver chain (ø 1.8 mm) with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eYes. The same neuron is available in \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-18k-gold-plated\"\u003e18K gold vermeil\u003c\/a\u003e at the same scale and chain length. Silver tends to suit working clinical and lab wear (and carries the Cajal stain link). Gold tends to suit graduation, retirement, or a major appointment in neuroscience or clinical neurology.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":26420321479,"sku":"NK0239-S","price":145.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/silver_neuron_necklace.png?v=1727355888"},{"product_id":"phylogenetic-tree","title":"phylogenetic tree necklace | silver","description":"\u003ch2\u003ephylogenetic tree necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eA phylogenetic tree necklace for evolutionary biologists, taxonomists, and anyone who has spent late nights running maximum likelihood on a sequence alignment. The branching diagram that connects every species on Earth to a common ancestor, in sterling silver.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind the Phylogenetic Tree\u003c\/h2\u003e\n\u003cp\u003eCharles Darwin sketched the first one in his 1837 notebook, with the words \"I think\" written above it. Modern phylogenetics builds these trees from molecular data: aligned DNA, RNA, or protein sequences run through algorithms like maximum likelihood and Bayesian inference, which infer the evolutionary relationships most likely to have produced the observed differences. The result is a hypothesis, not a fact, and it gets revised every time a new genome lands. Phylogenetic trees underpin biodiversity work, viral evolution tracking (the SARS-CoV-2 trees built during 2020 ran in near real time), and the classification of every newly described species.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cp\u003eFor people who think in branches and common ancestors, and who would notice if the topology were unrooted.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eevolutionary biologists and systematists\u003c\/li\u003e\n\u003cli\u003etaxonomists and biodiversity researchers\u003c\/li\u003e\n\u003cli\u003ebioinformaticians working on sequence data\u003c\/li\u003e\n\u003cli\u003eanyone who has Darwin's \"I think\" sketch on their office wall\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor the biologist who knows the tree of life is still being redrawn.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Science Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/phylogenetic-tree-18k-gold-plated\"\u003ePhylogenetic tree necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/darwins-phylogenetic-tree-18k-gold-plated\"\u003eDarwin's phylogenetic tree necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/trilobite\"\u003eTrilobite necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/ammonite\"\u003eAmmonite necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this the right gift for an evolutionary biologist?\u003c\/h3\u003e\n\u003cp\u003eYes, and it lands particularly well for people working on systematics, biodiversity, or molecular phylogenetics. It also reads as a quiet tribute to Darwin himself, which makes it suitable for biology faculty, museum researchers, and anyone whose office library leans heavily Origin-of-Species.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eDoes the design represent a specific tree, or evolution in general?\u003c\/h3\u003e\n\u003cp\u003eThe design is a stylised phylogenetic tree rather than a specific topology. It carries the visual logic of branching descent without committing to a particular set of taxa, which keeps it universal across fields. If a more historically loaded version is preferred, Darwin's original \"I think\" sketch is also available as a separate piece.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat are the materials and chain details?\u003c\/h3\u003e\n\u003cp\u003e925 polished sterling silver, nickel-free and hypoallergenic. The pendant is 30 mm tall. It comes on a 45 cm sterling silver chain with a 5 cm extender, lobster clasp. Ships free worldwide via DHL Express within 1-5 business days, with all import duties and taxes covered.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eYes, the same design is available in 18k gold vermeil if a warmer tone is preferred. Both versions ship in a ready-to-gift jewelry box and are covered by the 30-day Love It or Return It policy.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":26425630023,"sku":"NK0271-S","price":146.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/phylogenetic-tree-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51351629824348.png?v=1698774908"},{"product_id":"spindle-neuron","title":"spindle neuron necklace | silver","description":"\u003ch2\u003eSpindle neuron necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you can name the two cortical regions where Von Economo neurons concentrate, and tell anyone listening why the elephant and the bottlenose dolphin matter to the comparative-anatomy literature, you already know what the pendant carries. The specialist alternative to the generic neuron pendant. Worn here as a 37 mm sterling silver pendant.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Spindle Neuron\u003c\/h2\u003e\n\u003cp\u003eVon Economo neurons, also called spindle neurons, were first described by Constantin von Economo and Georg Koskinas in their 1925 cytoarchitectonic atlas of the human cortex, then largely forgotten until Esther Nimchinsky and Patrick Hof revisited the cells in the late 1990s. They are large bipolar projection neurons, three to four times bigger than typical pyramidal cells, concentrated in the anterior cingulate cortex and the frontoinsular cortex. The distribution outside humans is striking: great apes, several cetaceans, elephants, all species with complex social cognition. The cells are implicated in fast salience signalling, self-awareness, and behavioural inhibition. Selective loss of Von Economo neurons in the early stages of behavioural-variant frontotemporal dementia is one of the more reproducible cellular markers in neurodegenerative pathology.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ecortical neuroanatomists and comparative neuroscientists\u003c\/li\u003e\n\u003cli\u003efrontotemporal dementia clinicians and neuropathologists\u003c\/li\u003e\n\u003cli\u003ecognitive neuroscientists working on social cognition or self-awareness\u003c\/li\u003e\n\u003cli\u003egraduate students whose thesis touched the Nimchinsky-Hof revival of the 1990s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who reaches for spindle neurons when the conversation turns to social cognition or to the neuropathology of behavioural-variant FTD, rather than to the iconic-but-generic neuron of the textbook image.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Neuroscience Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron\"\u003eNeuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-18k-gold-plated\"\u003eNeuron necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-earrings\"\u003eNeuron earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell\"\u003ePurkinje cell necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/sagittal-brain-18k-gold-plated\"\u003eSagittal brain necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy pick the spindle neuron over the generic neuron pendant?\u003c\/h3\u003e\n\u003cp\u003eBecause the spindle neuron is a specialist call. The generic neuron is the foundational unit, recognised across all of neuroscience. The spindle neuron is recognised by people whose work specifically engages with anterior cingulate cortex, frontoinsular cortex, social-cognition pathology, or the comparative neuroanatomy of large-brained social mammals. Buying the spindle neuron tells the recipient you know the cell type they care about, not just the cell type that fits on a textbook cover.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat makes Von Economo neurons interesting beyond the size?\u003c\/h3\u003e\n\u003cp\u003eThe combination of size, distribution, and clinical signal. They are concentrated in two cortical regions tied to interoception and social processing, they appear preferentially in species with complex social structures, and they are selectively vulnerable in early behavioural-variant FTD. The convergent evolution argument holds that they evolved independently in great apes, cetaceans, and elephants because of shared cognitive demands rather than shared ancestry. The combination of comparative biology and clinical neurology is why the cells caught attention again in the late 1990s and have stayed in the literature since.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 37 mm pendant on a 45 cm sterling silver chain (ø 1.8 mm) with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eNot at present. The spindle neuron is sterling silver only. The generic \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-18k-gold-plated\"\u003eneuron pendant in 18K gold vermeil\u003c\/a\u003e exists as a gold counterpart in the same field if a gold neuroscience pendant is the goal.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":26426829447,"sku":"NK0338-S","price":130.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/spindle-neuron-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51401134145884.png?v=1699257675"},{"product_id":"fibroblast","title":"fibroblast necklace | silver","description":"\u003ch2\u003eFibroblast necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you have spent enough time at a tissue-culture hood watching fibroblasts spread, divide, and lay down their own extracellular matrix to know why they are the workhorse of cell biology, you already recognise what this is. The single most-cultured primary cell in research, the cell that built the field.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science of the Fibroblast\u003c\/h2\u003e\n\u003cp\u003eFibroblasts are the connective-tissue cells that produce and maintain the extracellular matrix: collagens, elastin, glycosaminoglycans, proteoglycans, fibronectin. They are the structural cells of skin, tendon, ligament, organ stroma, and most loose and dense connective tissue in the body, and they are the cells responsible for wound healing. When tissue is injured, resident fibroblasts proliferate, migrate into the wound, switch on a contractile programme to become myofibroblasts, and lay down the collagen scaffold that closes the defect. The same programme, run wrong, drives fibrosis: pulmonary fibrosis, cardiac fibrosis, liver cirrhosis, scleroderma. Fibroblasts are also the most common primary cell in research because they are easy to isolate, easy to culture, and tolerant of manipulation. The first immortalised cell lines, the first iPS-cell reprogramming experiments (Yamanaka 2006), and a large fraction of basic cell biology have used fibroblasts as the starting material.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cp\u003eThe audience clusters around connective-tissue and tissue-engineering work:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ecell biologists running primary fibroblast cultures\u003c\/li\u003e\n\u003cli\u003edermatologists, dermatopathologists, and skin researchers\u003c\/li\u003e\n\u003cli\u003ewound healing and regenerative medicine researchers\u003c\/li\u003e\n\u003cli\u003efibrosis researchers in pulmonary, cardiac, hepatic, and renal disease\u003c\/li\u003e\n\u003cli\u003eiPS-cell biologists and stem-cell researchers using fibroblasts as starting material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAbout a third of orders ship to academic cell biology and dermatology departments, with the rest going to biotech researchers, regenerative-medicine labs, and clinicians whose own connective-tissue story made the cell personal.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Cellular Biology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/mammalian-cell\"\u003eMammalian cell necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/red-blood-cell\"\u003eRed blood cell necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/macrophage\"\u003eMacrophage necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/membrane\"\u003eMembrane necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy a fibroblast pendant rather than a more iconic cell?\u003c\/h3\u003e\n\u003cp\u003eBecause fibroblasts are the cell most cell biologists actually work with. The neuron and the red blood cell are more recognisable as symbols, but the fibroblast is the cell that built the field: the first immortalised lines, the first iPS-cell reprogramming, much of the early work on the cytoskeleton and extracellular matrix. A piece naming the fibroblast specifically reads as a peer-recognition signal more than a generic \"I work in biology\" pendant.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy are fibroblasts central to fibrosis and to wound healing?\u003c\/h3\u003e\n\u003cp\u003eBecause they run the same programme in both. After injury, fibroblasts switch on a contractile, matrix-producing phenotype (myofibroblasts) that closes the wound by laying down collagen and contracting the defect. In acute injury this resolves: the myofibroblasts die off, the matrix remodels, and tissue function is restored. In chronic injury (recurrent damage, persistent inflammation, ageing) the programme stays on, and excess collagen accumulates as fibrotic tissue. Pulmonary fibrosis, cardiac fibrosis, liver cirrhosis, and scleroderma are all variations on the same theme. Most antifibrotic drugs in development target fibroblast activation or persistence, which is why understanding the cell at this level matters clinically as well as in basic research.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e26 mm pendant in 925 sterling silver, nickel-free. 45 cm sterling silver chain with a 5 cm extender. Ships free worldwide via DHL Express in 1-5 business days, with all import duties prepaid. Comes in a ready-to-gift jewelry box with the 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eNot currently. The fibroblast is silver only. The catalog has gold versions of several other cell-biology pieces (mammalian cell, red blood cell, ribosomes, nucleosomes) but the fibroblast is single-material for now.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":26499651207,"sku":"NK0141-S","price":170.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/096_fibroblast_silver_necklace.png?v=1736411939"},{"product_id":"4-cell-embryo","title":"4 cell embryo necklace | silver","description":"\u003ch2\u003e4 cell embryo necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eForty hours after fertilisation, two rounds of cell division produce four blastomeres, each still totipotent. This is the embryo most often photographed in IVF clinics, at the first morphology check, the moment that determines which embryo gets selected. A 4-cell embryo necklace in sterling silver.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Biology of the 4-Cell Stage\u003c\/h2\u003e\n\u003cp\u003eThe 4-cell stage occurs at roughly 40 to 44 hours after fertilisation, after two rounds of cleavage. The cells, called blastomeres, are still totipotent: in principle, each could give rise to a complete individual. This is the basis for monozygotic twinning at the 2 to 4-cell stage. The cleavage divisions are unusual: they increase cell number without increasing total cell mass, so each blastomere is half the size of its predecessor. By day 3 the embryo has typically reached the 8-cell stage. In clinical IVF, embryo morphology at the 4-cell stage is one of the early selection points before transfer, with symmetry, fragmentation, and cell size predicting implantation success.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eembryologists working with IVF and early embryo selection\u003c\/li\u003e\n\u003cli\u003edevelopmental biologists studying cell fate and totipotency\u003c\/li\u003e\n\u003cli\u003ereproductive endocrinologists and fertility specialists\u003c\/li\u003e\n\u003cli\u003ewomen carrying their own IVF story, including embryo transfer day\u003c\/li\u003e\n\u003cli\u003epartners and families marking the moment that began everything\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOften bought to mark a specific day: embryo transfer, a successful round, or the birth that came from one.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Embryology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/4-cell-embryo-18k-gold-plated\"\u003e4 cell embryo necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/blastocyst\"\u003eBlastocyst necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/embryo\"\u003eEmbryo necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/egg-and-sperm\"\u003eEgg and sperm necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this an appropriate gift after IVF, or after a difficult fertility journey?\u003c\/h3\u003e\n\u003cp\u003eOften yes, but it depends on the moment. The 4-cell embryo is the stage most often photographed in IVF clinics, the first morphology check before transfer. For people who came through a successful round, it tends to mark a specific day they don't want to forget. After a difficult journey, the answer is more personal. A short note that names what you're acknowledging usually does more than the pendant alone.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat does totipotent mean?\u003c\/h3\u003e\n\u003cp\u003eIt means each of the four cells can give rise to a complete individual on its own. The blastomeres at the 4-cell stage have not yet committed to becoming any particular tissue, including the placenta. After compaction at the 8 to 16-cell stage, the cells begin to differentiate. The inner ones become the embryo, the outer ones become the placenta. The 4-cell stage is the last point where each cell could theoretically still become anything.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 20 mm in 925 sterling silver, nickel-free and hypoallergenic, on a 45 cm sterling silver chain with a 5 cm extender and lobster clasp. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this available in gold vermeil?\u003c\/h3\u003e\n\u003cp\u003eYes. The 4-cell embryo is also available in 18k gold vermeil at a slightly higher price. Both versions are 20 mm and use the same design. The silver tends to be the choice for daily wear; the gold tends to be the choice when someone wants the piece to feel like a milestone marker. Same anatomy, two different registers.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":26501415879,"sku":"NK0001-S","price":195.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/4-cell-embryo-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51382006514012.png?v=1699039516"},{"product_id":"oxytocin-3d-1","title":"oxytocin necklace 3D | silver","description":"\u003ch2\u003eOxytocin necklace 3D | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you have ever solved a peptide structure, run a disulfide bridge through an NMR experiment, or worked on a Gq\/Gi-coupled GPCR, you already know why oxytocin matters. A cyclic nonapeptide held closed by one bond between two cysteines, with a backbone geometry that determines whether the molecule binds at all.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Oxytocin\u003c\/h2\u003e\n\u003cp\u003eOxytocin is a nine-residue cyclic peptide. A single intrachain disulfide between two cysteines locks the ring closed and fixes the conformation that the OXTR receptor recognises. Reduction of that bond abolishes activity. Du Vigneaud synthesised it in 1953, the first total synthesis of a polypeptide, and was awarded the Nobel Prize in 1955. The receptor is a Gq\/Gi-coupled GPCR. Vasopressin differs from oxytocin by only two amino acids and cross-reacts at OXTR, which is why high-dose vasopressin can produce uterine effects. Solution NMR studies in the 1990s mapped the detailed conformation that underpins receptor binding. Functionally, oxytocin drives labour contractions, milk letdown, and a body of social-bonding research that runs through behavioural neuroscience.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Audience\u003c\/h2\u003e\n\u003cp\u003eThe audience clusters around biochemistry and neuroendocrinology:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003estructural biochemists and peptide chemists\u003c\/li\u003e\n\u003cli\u003eNMR spectroscopists and computational biochemists\u003c\/li\u003e\n\u003cli\u003eobstetricians and maternal-fetal medicine specialists\u003c\/li\u003e\n\u003cli\u003eneuroendocrine researchers and behavioural neuroscientists\u003c\/li\u003e\n\u003cli\u003ePhD students and postdocs in structural biology or neuroscience\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAround a quarter of orders ship to PhD students and postdocs in peptide chemistry or structural biology. The rest go to clinicians and gift-givers who value the meaning behind the molecule.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/oxytocin-flat\"\u003eOxytocin necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/oxytocin-3d-18k-gold-plated\"\u003eOxytocin necklace 3D | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/oxytocin-18k-gold-plated\"\u003eOxytocin necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cystine\"\u003eCystine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this specific enough for a structural biochemist?\u003c\/h3\u003e\n\u003cp\u003eYes. The conformational constraints imposed by the disulfide bridge are central to how peptide hormones achieve specificity, and the 3D format reads as a peer reference to that fact rather than a generic molecule pendant. A structural biochemist, peptide chemist, or NMR spectroscopist will recognise the angle on first look.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is the disulfide bond so important to oxytocin?\u003c\/h3\u003e\n\u003cp\u003eBecause it locks the peptide into the conformation the receptor recognises. The bridge links two cysteine residues at positions one and six, forming a constrained ring that holds the backbone in the right geometry. Reduction of this bond abolishes activity, which is why oxytocin in a reducing environment loses its function rapidly. Conformational specificity, not amino acid composition, is what makes the molecule work.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e48 mm 3D pendant in 925 sterling silver, nickel-free. 45 cm sterling silver chain with a 5 cm extender and lobster clasp. Ships free worldwide via DHL Express in 1-5 business days, with all import duties prepaid. Comes in a ready-to-gift jewelry box with the 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the difference between the 3D and flat oxytocin necklaces?\u003c\/h3\u003e\n\u003cp\u003ePhysical form and scale. The 3D version is 48 mm and renders oxytocin in three dimensions. The flat version is smaller, in a two-dimensional skeletal style that mirrors how the molecule is drawn in textbooks. Both represent the same peptide. The choice is between a sculptural piece and a lighter, more graphic one. Both are available in silver and gold vermeil.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":30363107975,"sku":"NK0255-S","price":200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/silver_oxytocin_necklace_3D.png?v=1727368711"},{"product_id":"glucose","title":"glucose necklace | silver","description":"\u003ch2\u003eGlucose necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eGlucose is the primary fuel for every cell. The aldohexose at the centre of metabolism, energy production, and the systems that keep us alive. Precision crystal structure, a 21 mm sterling silver pendant on a standard chain.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Glucose\u003c\/h2\u003e\n\u003cp\u003eD-glucose is a six-carbon sugar (aldohexose) and the primary substrate for cellular energy production. In glycolysis, glucose is broken down to pyruvate and oxidized through the citric acid cycle and oxidative phosphorylation to generate ATP. Blood glucose is tightly regulated by insulin and glucagon, maintaining a narrow fasting range of 70-100 mg\/dL. When regulation fails, diabetes mellitus results, affecting hundreds of millions of people globally. Andreas Marggraf first isolated glucose from raisins in 1747. Hermann Emil Fischer determined its stereochemistry (the exact 3D shape) in 1891, earning him the Nobel Prize in Chemistry in 1902.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Will Recognise It\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ebiochemists and cell biologists teaching or researching metabolism\u003c\/li\u003e\n\u003cli\u003eendocrinologists, diabetes researchers, and clinical diabetologists\u003c\/li\u003e\n\u003cli\u003epeople whose bodies depend on insulin, glucose meters, and daily carbohydrate management\u003c\/li\u003e\n\u003cli\u003eanyone who sat through biochemistry and suddenly understood how their cells stay alive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAbout two-thirds of orders ship to researchers, one-third to people managing diabetes as daily lived reality.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine\"\u003eDopamine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin\"\u003eSerotonin necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/atp\"\u003eATP necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/caffeine\"\u003eCaffeine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs the glucose necklace appropriate for someone with diabetes?\u003c\/h3\u003e\n\u003cp\u003eYes, absolutely. Many people living with type 1 or type 2 diabetes describe glucose as the molecule they think about daily, the one they manage and live with from diagnosis onward. For them, the glucose necklace is a way to mark that relationship as something meaningful and owned, not something to hide. It's also appropriate for researchers, educators, and anyone in the diabetic community who wants to carry the science they live.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat makes glucose so fundamentally different from other sugars?\u003c\/h3\u003e\n\u003cp\u003eGlucose has the rare combination of structural stability and metabolic accessibility. It's stable enough to circulate in the bloodstream for hours without degrading, but its six carbons are arranged so that they are easy to break apart and oxidize. Nearly every organism on Earth has evolved glucose metabolism, from bacteria to humans. Humans specifically burn roughly 120 grams of glucose daily at rest, with the brain alone consuming about 20% of all glucose energy. Glucose is not just fuel. It is the fuel that evolution settled on.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size and material?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 21 mm pendant on a 45 cm sterling silver chain (ø 1.8 mm) with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eHow does the necklace differ from the glucose earrings?\u003c\/h3\u003e\n\u003cp\u003eScale and format. The earrings are 14 mm and sit at hand distance for conversation. The necklace is 21 mm and rests at the chest as a centered pendant. Same glucose molecule, two different sizes and moments. The earrings are intimate, the necklace is grounded.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":30805954503,"sku":"NK0158-S","price":130.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/glucose-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51379716751708.png?v=1699022228"},{"product_id":"electrical-circuit-of-heart","title":"cardiac conduction system necklace | silver","description":"\u003ch2\u003eCardiac conduction system necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe cardiac conduction system is the heart's own wiring. From the sinoatrial node in the right atrial wall, the impulse spreads across the atria to the AV node, down the bundle of His, and out across the Purkinje fibres that fire each ventricular contraction. The pendant traces that path.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind the Conduction System\u003c\/h2\u003e\n\u003cp\u003eThe cardiac conduction system begins at the sinoatrial (SA) node in the right atrial wall, the heart's natural pacemaker, generating 60 to 100 impulses per minute at rest. The impulse spreads across the atria to the atrioventricular (AV) node at the base of the right atrium, which introduces a brief delay (roughly 0.1 seconds) allowing atrial emptying before the ventricles contract. From the AV node the impulse travels down the bundle of His, divides into left and right bundle branches, and spreads through the Purkinje fibre network to activate ventricular myocardium in a coordinated, apex-to-base sequence. Disruption at any point produces characteristic ECG patterns: heart block, bundle branch block, pre-excitation syndromes, and re-entrant arrhythmias.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ecardiologists, cardiac electrophysiologists, and cardiac device specialists\u003c\/li\u003e\n\u003cli\u003earrhythmia specialists who ablate the abnormal pathways\u003c\/li\u003e\n\u003cli\u003ecardiac nurses and ECG technicians who interpret rhythms daily\u003c\/li\u003e\n\u003cli\u003ecardiology fellows working through their EP rotation\u003c\/li\u003e\n\u003cli\u003epatients who have had their own rhythm mapped or paced\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often bought by people who can sketch the conduction pathway from memory.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Cardiology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/anatomical-heart-necklace\"\u003eHeart necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heartbeat\"\u003eHeartbeat necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/aorta\"\u003eAorta necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heart-section\"\u003eHeart section necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWill a cardiac electrophysiologist actually appreciate this?\u003c\/h3\u003e\n\u003cp\u003eMost do. Electrophysiology is one of the more visual subspecialties in cardiology. Every procedure involves mapping conduction pathways and reading ECG patterns. The conduction-system pendant is recognisable to anyone who has spent time looking at His-Purkinje activation patterns or 12-lead ECGs. The format reads as anatomical jewellery to non-cardiologists, which suits how most clinicians prefer to wear pieces from their field at work.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy does the AV node introduce a delay?\u003c\/h3\u003e\n\u003cp\u003eThe AV node is the only electrical bridge between the atria and the ventricles. Its conduction velocity is deliberately slow, around 0.05 metres per second compared to about 4 metres per second in the Purkinje fibres. The delay (roughly 0.1 seconds) gives the atria time to finish contracting and pumping blood into the ventricles before the ventricles themselves contract. Without that delay, atrial and ventricular contraction would overlap and the heart's pumping efficiency would collapse.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is in 925 sterling silver, nickel-free and hypoallergenic, sized to read clearly without overstating itself. It comes on a 45 cm sterling silver chain (1.8 mm width, lobster clasp) with a 5 cm extender. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this available in gold vermeil?\u003c\/h3\u003e\n\u003cp\u003eYes. The same conduction-system design is available in 18k gold vermeil at a slightly higher price. Most cardiologists pick the silver for daily wear in clinic. The gold tends to be the choice for graduations, board-passing, or fellowship completion, when someone wants the piece to mark a specific transition rather than sit on every day.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":30806564103,"sku":"NK0055-S","price":145.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/cardiac-conduction-system-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51378471600476.png?v=1699015749"},{"product_id":"thc","title":"THC necklace 3D | silver","description":"\u003ch2\u003eTHC necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eWhat made tetrahydrocannabinol scientifically interesting was not what it did to the brain but what it found there. The receptor THC binds to was discovered because of THC. The brain's own ligand for that receptor, anandamide, was named after the Sanskrit word for bliss. As a 45 mm sterling silver pendant, the full Δ9-THC structure rendered in three dimensions.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind THC\u003c\/h2\u003e\n\u003cp\u003eΔ9-tetrahydrocannabinol is the principal psychoactive compound in Cannabis sativa, isolated and structurally characterised by Raphael Mechoulam and Yechiel Gaoni at the Hebrew University of Jerusalem in 1964. The receptor it binds to, CB1, was identified by Lisa Matsuda's group in 1990 and is now known to be the most abundant G-protein-coupled receptor in the brain. CB2 sits primarily on immune cells. The brain's own cannabinoids, anandamide (1992) and 2-arachidonoylglycerol (1995), function as retrograde lipid messengers that modulate synaptic transmission, pain processing, mood regulation, appetite, and immune response. The molecule that put the entire endocannabinoid system on the map.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Will Recognise It\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eneuropharmacologists and cannabinoid researchers\u003c\/li\u003e\n\u003cli\u003emedicinal chemists working on receptor pharmacology\u003c\/li\u003e\n\u003cli\u003eclinicians prescribing cannabinoid-based therapies for nausea, pain, or epilepsy\u003c\/li\u003e\n\u003cli\u003eanyone for whom the structure of THC is a working object, not a recreational reference\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who reaches for THC when the conversation is about endocannabinoid signalling, not what the plant feels like.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/thc-18k-gold-plated\"\u003eTHC necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/thc-1\"\u003eTHC necklace flat | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin-vertical\"\u003eSerotonin necklace V | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine\"\u003eDopamine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/glutamate\"\u003eGlutamate necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this a research piece or a recreational reference?\u003c\/h3\u003e\n\u003cp\u003eFor most buyers, a research piece. Working cannabinoid pharmacologists and clinicians who use cannabinoid-based therapies pick this up as a reference to the molecule's pharmacology, not its plant-extract origin. The molecule that revealed the endocannabinoid system is also the one that drove the development of dronabinol for chemotherapy-induced nausea and cannabidiol-based therapies for refractory epilepsy. The recreational reading exists, but it is not the reading the audience tends to bring.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy does THC reveal so much about the brain even though it comes from a plant?\u003c\/h3\u003e\n\u003cp\u003eBecause the brain already had the receptor and the natural ligand. THC works in humans by occupying CB1, the receptor the brain evolved for its own lipid messenger anandamide. About 20% of orders ship to working neuroscientists or pharmacologists. The plant just happened to produce a compound that mimics what the brain already does to itself, which is why the molecule has been such a productive research tool.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 45 mm pendant on a 45 cm sterling silver chain with a 5 cm extender. Larger scale than most pieces in the catalogue, the full 3D Δ9-THC structure rendered in detail. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version, or a smaller silver one?\u003c\/h3\u003e\n\u003cp\u003eBoth. The same 45 mm 3D structure is available in \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/thc-18k-gold-plated\"\u003e18K gold vermeil\u003c\/a\u003e. A smaller, flatter \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/thc-1\"\u003esilver THC pendant\u003c\/a\u003e exists for daily-wear at a more discreet scale. Three different formats of the same molecule.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":32135738183,"sku":"NK0358-S","price":179.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/thc-necklace-3d-silver-necklaces-science-jewelry-sciencejewelry1824-51397973672284.png?v=1699204928"},{"product_id":"quinine-3d","title":"quinine necklace | silver","description":"\u003ch2\u003eQuinine necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you have ever managed a patient with severe falciparum malaria in a region where chloroquine resistance has rewritten the protocol, quinine is the molecule the textbook still falls back to. Older than every modern antimalarial, still on the WHO essential medicines list, still active when the newer drugs run out of options. Worn here as a 42 mm sterling silver pendant.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Quinine\u003c\/h2\u003e\n\u003cp\u003eQuinine is a cinchona alkaloid that kills Plasmodium parasites by interfering with heme detoxification inside the parasite's food vacuole. As the parasite digests host haemoglobin, free heme accumulates and is toxic to the parasite itself. Quinine and the related 4-aminoquinolines block the polymerisation of heme into inert hemozoin crystals, leaving free heme to kill the parasite from the inside. Plasmodium falciparum strains have evolved resistance to chloroquine across most of the tropics over the past fifty years, which is part of why quinine retains a clinical role: it predates the resistance landscape and remains effective against severe and complicated malaria when newer agents fail. Modern artemisinin combination therapy is now the first line in most places, but quinine sits behind it as a working second-line option.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003einfectious disease physicians and tropical medicine specialists\u003c\/li\u003e\n\u003cli\u003epharmacologists and medicinal chemists\u003c\/li\u003e\n\u003cli\u003eclinical researchers working on antimalarial resistance\u003c\/li\u003e\n\u003cli\u003escience historians and chemistry educators with an interest in the cinchona story\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who reaches for quinine when the conversation is about chloroquine resistance and what comes after, not about gin and tonic.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/quinine-necklace-gold-vermeil\"\u003eQuinine necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cyclosporine\"\u003eCyclosporine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/doxorubicin\"\u003eDoxorubicin necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/arsenic-trioxide\"\u003eArsenic trioxide necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/chlorophyll\"\u003eChlorophyll necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy pick the silver quinine over the gold?\u003c\/h3\u003e\n\u003cp\u003eThe silver suits daily clinical wear in a way the gold does not. Working ID and tropical medicine clinicians who treat malaria as part of their case mix tend to want the molecule on rotation rather than reserved for a milestone. The 42 mm pendant carries the structure at full clinical scale. The gold is the milestone-gift companion for a graduation or major appointment in pharmacology or infectious-disease medicine.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy does quinine still matter when artemisinin is the first line?\u003c\/h3\u003e\n\u003cp\u003eBecause resistance to artemisinin has emerged in Southeast Asia and is being tracked carefully elsewhere, and the pipeline of replacement antimalarials is thinner than the malaria-treatment community would like. Quinine is the historical fallback that pre-dates the modern resistance landscape. The WHO still lists it for severe complicated malaria when artemisinin combination therapy is not available or has failed. The molecule has held a clinical role for two centuries and is unlikely to be retired soon.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 42 mm pendant on a 45 cm sterling silver chain with a 5 cm extender. Larger scale than most pieces in the catalogue. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eYes. The same 42 mm quinine pendant is available in \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/quinine-necklace-gold-vermeil\"\u003e18K gold vermeil\u003c\/a\u003e at the same chain length. Silver tends to suit daily clinical wear, gold tends to suit graduation, retirement, or a major career milestone in pharmacology or infectious-disease medicine.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":33441303303,"sku":"NK0289-S","price":200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/quinine-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51397970493788.png?v=1699204754"},{"product_id":"juniper-3d","title":"juniper necklace | silver","description":"\u003ch2\u003eJuniper necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you have spent enough time on Juniperus communis to know why the seed cones are technically not berries, and to recognise α-pinene and sabinene as the volatile signature of a working juniper extract, you already know what the pendant carries. The botanical that defines gin. Worn here as a 24 mm sterling silver pendant.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Botany of Juniper\u003c\/h2\u003e\n\u003cp\u003eJuniperus communis is a coniferous shrub or small tree of the Cupressaceae family, distributed widely across the temperate and boreal Northern Hemisphere. The cones often called juniper berries are not true berries but modified seed cones with fused fleshy scales, ripening from green to dark blue-purple over two to three years. The volatile profile is dominated by α-pinene, sabinene, myrcene, and limonene, the same monoterpenes that give gin its characteristic aromatic identity. Juniper has been used as a traditional medicine for diuretic and antiseptic effects for over two thousand years, and the genus Juniperus contains roughly fifty to seventy species depending on the taxonomy used. The botanical's central role in gin distillation traces back to seventeenth-century Dutch genever, where physicians and distillers used juniper-infused spirits as both medicine and beverage. The transition from genever to London Dry Gin in the eighteenth and nineteenth centuries kept juniper as the defining botanical.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ebotanists and dendrologists working on conifers or temperate forest ecology\u003c\/li\u003e\n\u003cli\u003eethnobotanists and pharmacognosy researchers tracing traditional plant medicines\u003c\/li\u003e\n\u003cli\u003edistillers, gin producers, and beverage scientists working with botanical extracts\u003c\/li\u003e\n\u003cli\u003ephytochemists working on monoterpene biosynthesis or plant volatile profiles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who reaches for juniper when the conversation is about Cupressaceae taxonomy or about why genever and London Dry diverged, rather than gin-and-tonic preferences.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/juniper-necklace-gold-vermeil\"\u003eJuniper necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/ethanol-necklace-gold-vermeil\"\u003eEthanol necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/caffeine\"\u003eCaffeine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/theobromine\"\u003eTheobromine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/scarab-beetle\"\u003eScarab beetle necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs the juniper pendant for working botanists or for gin enthusiasts?\u003c\/h3\u003e\n\u003cp\u003eBoth, in roughly equal measure. Working botanists and ethnobotanists buy it as a reference to a plant they study or teach. Distillers and beverage scientists buy it because juniper is the botanical that defines gin and the molecule of their working day. Gin enthusiasts who pick up the pendant tend to do so because they understand the botanical seriously rather than the cocktail casually. The piece works for any of those readings without committing to one.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy does juniper define gin specifically?\u003c\/h3\u003e\n\u003cp\u003eBecause seventeenth-century Dutch physicians and distillers used juniper-infused spirits as a medicinal preparation, and the resulting genever crossed the Channel with returning English soldiers in the late seventeenth century. The Gin Act of 1751 and successive London-distilling traditions kept juniper as the legally and culturally defining botanical of the spirit. By the time London Dry Gin emerged in the nineteenth century, juniper-forward formulation had become the regulatory and stylistic anchor that distinguishes gin from other spirits. Other botanicals can be added, but juniper has to lead.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 24 mm pendant on a 45 cm sterling silver chain (ø 1.8 mm) with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eYes. The same juniper pendant is available in \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/juniper-necklace-gold-vermeil\"\u003e18K gold vermeil\u003c\/a\u003e at the same 24 mm size and chain length. Silver tends to suit working botanical and lab use, gold tends to suit a botany graduation, ethnobotany research milestone, or gin-distillery anniversary.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":33441472391,"sku":"NK0191-S","price":160.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/juniper-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51397960368476.png?v=1699204751"},{"product_id":"purkinje-cell","title":"purkinje cell necklace | silver","description":"\u003ch2\u003ePurkinje cell necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe Purkinje cell is the largest neuron in the cerebellum and the most elaborate dendritic tree in the vertebrate brain. The sole output of the cerebellar cortex, the cell where motor learning lives. Worn here as a 47 mm sterling silver pendant.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Purkinje Cell\u003c\/h2\u003e\n\u003cp\u003ePurkinje cells are GABA-ergic neurons that form a single layer between the molecular layer and the granular layer of the cerebellar cortex. Their dendritic trees are flat, planar, and the most elaborate of any vertebrate neuron, with up to 200,000 parallel-fibre synapses on a single cell. They are the sole output of the cerebellar cortex, projecting to the deep cerebellar nuclei and from there to thalamus, motor cortex, brainstem, and spinal cord. Each Purkinje cell receives input from one climbing fibre (originating in the inferior olive) and from hundreds of thousands of parallel fibres (granule cell axons). Long-term depression at parallel-fibre-Purkinje synapses, induced by climbing-fibre activity, is the cellular substrate of cerebellar motor learning. Loss of Purkinje cells is the defining cellular pathology in spinocerebellar ataxia and several other cerebellar disorders.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ecerebellar neuroscientists working on motor learning, timing, or coordination\u003c\/li\u003e\n\u003cli\u003emovement-disorder neurologists treating spinocerebellar ataxia or other cerebellar pathology\u003c\/li\u003e\n\u003cli\u003eneuroanatomists who teach the cerebellum and recognise the cell type on sight\u003c\/li\u003e\n\u003cli\u003egraduate students whose thesis touches climbing-fibre or parallel-fibre physiology\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who can sketch the dendritic tree from memory, and who knows that long-term depression at the parallel-fibre synapse is what makes motor learning possible.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Neuroscience Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell-18k-gold-plated\"\u003ePurkinje cell necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron\"\u003eNeuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-18k-gold-plated\"\u003eNeuron necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spindle-neuron\"\u003eSpindle neuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/brain-sagittal\"\u003eSagittal brain necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy pick the Purkinje cell over the generic neuron pendant?\u003c\/h3\u003e\n\u003cp\u003eBecause the Purkinje cell is a specialist call within neuroscience. The generic neuron is the foundational unit recognised across the field. The Purkinje cell is recognised by people whose work specifically engages with the cerebellum, motor learning, or movement-disorder pathology. Buying the Purkinje cell tells the recipient you know the cell type they think about daily, not just the cell type that fits on a textbook cover.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat makes the Purkinje cell's dendritic tree so unusual?\u003c\/h3\u003e\n\u003cp\u003eTwo things. First, it is planar. The dendrites fan out in a single plane perpendicular to the parallel fibres, which means the Purkinje cell can integrate inputs from a long line of granule cells along that axis. Second, the parallel-fibre synapse count is roughly 200,000 per cell, the highest of any vertebrate neuron. The resulting computational capacity, combined with the climbing-fibre teaching signal from the inferior olive, makes the Purkinje cell the textbook example of supervised learning at the cellular level.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 47 mm pendant on a 45 cm sterling silver chain (ø 1.8 mm) with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eYes. The same Purkinje cell is available in \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell-18k-gold-plated\"\u003e18K gold vermeil\u003c\/a\u003e at the same 47 mm size and chain length. Silver tends to suit working clinical or lab use, gold tends to suit a milestone in cerebellar neuroscience or a major appointment in clinical neurology.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":39359231047,"sku":"NK0285-S","price":160.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/purkinje-cell-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51387282096476.png?v=1699093868"},{"product_id":"circle-of-willis","title":"circle of Willis necklace | silver","description":"\u003ch2\u003eCircle of Willis necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you have trained on stroke protocols, you know the circle of Willis before you know most other brain anatomy. The arterial ring at the base of the brain that provides collateral perfusion when one vessel is blocked. Thomas Willis described it in 1664, and it remains the key to understanding why some strokes are catastrophic and others are survivable.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Circle of Willis\u003c\/h2\u003e\n\u003cp\u003eThe circle of Willis is an anastomotic ring at the base of the brain formed by the anterior cerebral arteries, anterior communicating artery, internal carotid arteries, posterior communicating arteries, and posterior cerebral arteries (from the basilar artery). In theory, it provides complete collateral perfusion if one major vessel is occluded. In practice, a complete circle exists in fewer than 50 percent of people. Anatomical variants are common, and the clinical significance of collateral flow depends entirely on which vessels are patent. Intracranial aneurysms occur most frequently at the branching points of the circle, where haemodynamic stress is greatest. The circle of Willis is also a major site of vasospasm after subarachnoid haemorrhage.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eneurosurgeons treating intracranial aneurysms and cerebrovascular disease\u003c\/li\u003e\n\u003cli\u003einterventional neuroradiologists performing angiography and endovascular work\u003c\/li\u003e\n\u003cli\u003estroke neurologists and neurointensivists managing acute cerebrovascular events\u003c\/li\u003e\n\u003cli\u003emedical students navigating neurovasculature for the first time\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Neuroscience Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/circle-of-willis-18k-gold-plated\"\u003eCircle of Willis necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/brain\"\u003eBrain necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spindle-neuron\"\u003eSpindle neuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron\"\u003eNeuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWould a neurointerventionalist actually wear this?\u003c\/h3\u003e\n\u003cp\u003eYes. The circle of Willis is their working anatomy. Every angiogram traces this ring. Every intracranial intervention hinges on understanding its variants and collateral potential. A pendant that carries this structure is meaningful to anyone who navigates cerebrovascular space daily.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is the circle of Willis not the same in everyone?\u003c\/h3\u003e\n\u003cp\u003eBecause variants are developmentally common. A hypoplastic posterior communicating artery, an absent anterior communicating vessel, or other anatomical differences alter the ring's completeness. This variability determines whether collateral flow can occur when a major vessel is blocked. It's why understanding individual anatomy via imaging is critical in stroke prevention and treatment planning.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e43 mm pendant in 925 polished sterling silver, nickel-free and hypoallergenic. 45 cm sterling silver chain with 5 cm extender. Ships free worldwide via DHL Express in 1-5 business days. Comes ready-to-gift with the 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs the gold version available at the same size?\u003c\/h3\u003e\n\u003cp\u003eYes. The circle of Willis is available in 18k gold vermeil at 43 mm. Same anatomical ring, same collateral story, same clinical meaning. Material is the only difference. Many neurosurgeons pair the silver clinical version with the gold vermeil as a milestone upgrade.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":40631011975,"sku":"NK0066-S","price":145.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/circle-of-willis-necklace-silver.png?v=1726840779"},{"product_id":"hyoid-bone","title":"hyoid bone necklace | silver","description":"\u003ch2\u003eHyoid bone necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe hyoid bone is the only bone in the human body that does not articulate with another bone. It floats suspended in the anterior neck, anchored by ligaments and muscles, supporting the tongue and larynx. A solitary structure performing complex work, worn here as a 36 mm sterling silver pendant for those who recognise the power of the independent, unsupported, and essential.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Anatomy and Forensic Significance of the Hyoid Bone\u003c\/h2\u003e\n\u003cp\u003eThe hyoid bone is a U-shaped bone located in the anterior neck at approximately the level of the third cervical vertebra. It stands apart in human anatomy because it does not articulate with any other bone. Instead, it is suspended from the styloid processes of the temporal bones via the stylohyoid ligaments and supported by numerous muscles including the mylohyoid, stylohyoid, and geniohyoid muscles. The hyoid serves as an attachment point for muscles of the tongue (hyoglossus), pharynx, and larynx, making it essential for swallowing, phonation, and speech. The greater horns of the hyoid extend posterolaterally and provide attachment for muscles and ligaments involved in laryngeal elevation. In forensic pathology, hyoid bone fracture is recognised as a strong indicator of manual strangulation, particularly when fracture occurs in the greater horns or at the thyroid cartilage junction. While hyoid fracture is not pathognomonic of strangulation, its presence significantly supports the suspicion of ligature or manual strangulation in autopsy cases.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eforensic pathologists and medical examiners investigating traumatic death\u003c\/li\u003e\n\u003cli\u003eotolaryngologists specializing in laryngeal and pharyngeal anatomy and function\u003c\/li\u003e\n\u003cli\u003espeech-language pathologists understanding the anatomical basis of swallowing and phonation\u003c\/li\u003e\n\u003cli\u003eanatomists teaching the solitary independence and functional complexity of the hyoid\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWear it as a reminder that some of the most important structures in the body require no articulation with others to do their work.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Anatomy Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/knee\"\u003eKnee necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/humerus\"\u003eHumerus necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heart-section\"\u003eHeart-section necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/lungs\"\u003eLungs necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/uterus\"\u003eUterus necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat makes the hyoid bone anatomically distinct?\u003c\/h3\u003e\n\u003cp\u003eThe hyoid bone is the only bone in the human skeleton that does not articulate with any other bone. It is suspended in the anterior neck by the stylohyoid ligaments (which connect it to the temporal bones) and supported by several muscles including the mylohyoid, stylohyoid, geniohyoid, and hyoglossus muscles. This suspension system allows the hyoid to move freely during swallowing and speech without the constraints of a rigid joint. Most other skeletal elements either articulate with adjacent bones (movable joints) or are fused to them (fixed joints). The hyoid is a solitary exception, an independent structure held in place by ligaments and muscles rather than bone-to-bone connection.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is hyoid bone fracture significant in forensic pathology?\u003c\/h3\u003e\n\u003cp\u003eHyoid bone fracture is recognised as a strong indicator of manual strangulation or ligature asphyxia in forensic autopsy cases. When external pressure is applied to the anterior neck (as occurs during strangulation), the hyoid and thyroid cartilage can fracture, particularly at the greater horns of the hyoid. However, hyoid fracture is not pathognomonic (specific to a single cause) of strangulation because it can also occur from blunt trauma, falls, or other accidents. The presence of hyoid fracture significantly raises the suspicion of strangulation, particularly when combined with other autopsy findings such as ligature marks, petechiae (pinpoint haemorrhages), and bruising patterns consistent with manual or ligature asphyxia.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat material is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 36 mm pendant on a 45 cm sterling silver chain (ø 1.8 mm) with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this available in gold?\u003c\/h3\u003e\n\u003cp\u003eCurrently available in sterling silver only. If you are interested in a gold vermeil version, please contact us with a custom order inquiry.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":41102124871,"sku":"NK0179-S","price":195.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/hyoid-bone-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51387896267100.png?v=1699097469"},{"product_id":"tooth","title":"tooth necklace | silver","description":"\u003ch2\u003eTooth necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eA tooth necklace for dentists, oral surgeons, and anyone who finds the architecture of enamel and dentine worth carrying. The most durable structure the human body produces, in sterling silver.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Anatomy of a Tooth\u003c\/h2\u003e\n\u003cp\u003eA tooth is built in three layers. Enamel on the outside, almost entirely hydroxyapatite, harder than bone and the only mineral structure the body makes that it cannot regrow. Dentine underneath, slightly softer, alive, and able to feel cold and pressure. At the centre, the pulp: blood vessels and a nerve, threaded down through the root. The roots anchor into alveolar bone through the periodontal ligament, one of the few ligaments in the body under continuous load. The pendant follows the basic tooth form: crown above the gumline, roots tapering below.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cp\u003eFor the people whose working day runs through other people's mouths.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003egeneral dentists, orthodontists, endodontists, and periodontists\u003c\/li\u003e\n\u003cli\u003eoral and maxillofacial surgeons\u003c\/li\u003e\n\u003cli\u003edental hygienists, dental assistants, and dental nurses\u003c\/li\u003e\n\u003cli\u003edental students and graduating dentists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who has spent years learning to read the structure they were looking at, and still finds it worth wearing.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Human Anatomy Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/tooth-18k-gold-plated\"\u003eTooth necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dental-mirror\"\u003eDental mirror necklace | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/rib-cage-necklace-gold-vermeil\"\u003eRib cage necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/rod-of-asclepius\"\u003eRod of Asclepius necklace | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWho is this tooth necklace for?\u003c\/h3\u003e\n\u003cp\u003eMostly dental professionals: general dentists, orthodontists, endodontists, periodontists, oral surgeons, hygienists, and the wider clinical team. It also tends to land with dental students, parents of someone graduating into the field, and the rare patient who walked out grateful enough to buy their dentist a real gift.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is enamel harder than bone?\u003c\/h3\u003e\n\u003cp\u003eEnamel is roughly 96 percent hydroxyapatite, packed into long mineral rods running from the dentine outward. Bone is closer to 70 percent mineral, with a more flexible protein matrix to handle load. Teeth need to handle direct, repeated, point-loaded force without flex, so the body trades flexibility for hardness. The result is the hardest substance the human body produces, and the only one it cannot regrow once it is gone.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 16 mm and weighs little enough to be unobtrusive. It comes on a 45 cm sterling silver chain (1.8 mm width, lobster clasp) with a 5 cm extender. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, packaged in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this a graduation gift or an everyday piece?\u003c\/h3\u003e\n\u003cp\u003eBoth. A new dentist hanging their diploma on a wall will wear this in clinic the next morning. The pendant is small and clean enough to live under a shirt, and obvious enough to spark a conversation when it shows. Pairs with the dental mirror necklace if someone wants to lean further into the kit.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":41396409543,"sku":"NK0372-S","price":160.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/tooth-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51387304575324.png?v=1699094051"},{"product_id":"scalpel","title":"scalpel necklace | silver","description":"\u003ch2\u003eScalpel necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe scalpel is one of the few surgical instruments that hasn't fundamentally changed in two thousand years. Egyptian and Roman surgeons used bronze and iron versions of essentially the same shape. Material science improved the edge. The form did not need improving.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Scalpel\u003c\/h2\u003e\n\u003cp\u003eThe modern surgical scalpel uses standardised disposable steel blades in numbered sizes: blade 10 is the workhorse for skin incisions, blade 11 for stab cuts and arteriotomies, blade 15 for delicate work, and blades 20-22 for larger general incisions. Carbon-steel blades hold a finer edge but corrode, which is why stainless steel is standard for disposables. The Bard-Parker handle and blade system, developed in the 1920s, established the interchangeable format still used in operating rooms worldwide. Top-grade surgical blades are ground to an edge of just a few nanometres, thinner than the diameter of a single cell, which is why a fresh blade cuts skin without crushing the surrounding tissue.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cp\u003eSurgical training has its own quiet identity.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003esurgeons and surgical residents\u003c\/li\u003e\n\u003cli\u003emedical students entering surgical specialties\u003c\/li\u003e\n\u003cli\u003eveterinary surgeons\u003c\/li\u003e\n\u003cli\u003eoperating theatre nurses and surgical technologists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAbout a third of orders go to working surgeons or surgical trainees. The rest go to medical-school graduates who chose surgery and to family members marking the milestone.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Medical Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/scalpel-18k-gold-plated\"\u003eScalpel necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/scalpel-earrings\"\u003eScalpel earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/stethoscope\"\u003eStethoscope necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/syringe\"\u003eSyringe necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dental-mirror\"\u003eDental mirror necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this a fitting gift for a surgeon?\u003c\/h3\u003e\n\u003cp\u003eSpecifically, yes. The scalpel is the instrument surgeons reach for first, and the symbol carries the weight of the work without needing a logo or a slogan. We see it bought as a graduation gift, as a chief-residency present, and as a thank-you from teams to surgeons they have worked with.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy has the scalpel design barely changed?\u003c\/h3\u003e\n\u003cp\u003eBecause the function is settled. A thin, sharp edge for a controlled cut. Material science improved the steel, the standardised handles made blades interchangeable, and the disposable blade system made sterilisation routine. The geometry that does the actual cutting has been right for centuries.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat about size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e42 mm pendant in 925 polished sterling silver, nickel-free. 45 cm sterling silver chain with a 5 cm extender. Free worldwide DHL Express, 1-5 business days, all duties and taxes covered. 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eYes. The gold vermeil counterpart is the same 42 mm size, same design. Sterling silver core with 2.5 micron 18K gold plating. The silver here is solid 925 sterling. Pick by which metal the recipient already wears, or pair with another medical pendant from the same finish.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":41470613319,"sku":"NK0317-S","price":135.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/scalpel-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51381950218588.png?v=1699038790"},{"product_id":"dna-earrings","title":"DNA earrings | silver","description":"\u003ch2\u003eDNA earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eDNA earrings for molecular biologists, geneticists, biology students, and anyone who wants the double helix as a daily piece rather than a statement. The structure that stores every inheritable instruction in every living cell, scaled down to 20 mm and rendered in 925 sterling silver.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind DNA\u003c\/h2\u003e\n\u003cp\u003eDNA replication is remarkably accurate. The error rate of DNA polymerase itself is roughly one mistake per 100,000 base pairs. After proofreading by the polymerase and a second round of mismatch repair by dedicated repair enzymes, the final error rate drops to approximately one per billion base pairs per replication cycle. This fidelity is what makes multicellular life possible: the human genome contains about 3.2 billion base pairs, and any given cell divides thousands of times over a lifetime, so even small failures of repair would accumulate into chaos. The molecular machinery responsible for identifying and repairing mismatches was characterised by Tomas Lindahl, Paul Modrich, and Aziz Sancar, who shared the 2015 Nobel Prize in Chemistry for their work on DNA repair. The double helix on the pendant is the same structure those repair enzymes act on, every time a cell divides.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cp\u003eFor the people who recognise an accurate helix on sight.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003emolecular biologists, geneticists, and biochemists\u003c\/li\u003e\n\u003cli\u003egenetics and biology students through their first dissection of the central dogma\u003c\/li\u003e\n\u003cli\u003escience teachers, communicators, and anyone who explains heredity for a living\u003c\/li\u003e\n\u003cli\u003eanyone whose own diagnosis or family history made the molecule personal\u003c\/li\u003e\n\u003cli\u003eshoppers looking for science earrings or biology earrings as a daily piece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who wants the most foundational structure in biology in a small, wearable form, including for the bench, the lecture room, or anywhere else they spend their working day.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Genetics Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna-earrings-gold-vermeil\"\u003eDNA earrings | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna-earring-hoops-small\"\u003eDNA earring hoops S | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna-earring-hoops-crossed\"\u003eDNA earring hoops crossed | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna\"\u003eDNA necklace V | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat style of DNA earrings are these?\u003c\/h3\u003e\n\u003cp\u003eDrop earrings rendering the DNA double helix in three dimensions, on standard sterling silver leverback hooks. The helix hangs cleanly from the lobe and reads as a proportioned structure rather than a stylised silhouette. People who wear earrings daily tend to like that the helix is recognisable from the side without being heavy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWho typically wears DNA earrings?\u003c\/h3\u003e\n\u003cp\u003eMostly people who work with the molecule: molecular biologists, geneticists, biochemists, lab researchers, and biology or medical students well into their training. Outside the field, the earrings tend to land with science teachers, with anyone whose family history of a hereditary condition made the molecule personal, and with shoppers searching for science earrings or biology earrings as a daily piece. Quiet enough for daily wear, specific enough to spark recognition from someone who knows.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are the earrings and what material?\u003c\/h3\u003e\n\u003cp\u003eEach earring is 20 mm tall, sized so the double helix is readable as a structure rather than a vague twist. They are 925 sterling silver, nickel-free and hypoallergenic, on sterling silver leverback hooks for secure daily wear. The pair comes in a ready-to-gift jewelry box. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eDo you also have DNA earrings as studs, hoops, or in gold?\u003c\/h3\u003e\n\u003cp\u003eYes. The gold vermeil version of these drop earrings is the warmer counterpart of this pair. The DNA earring hoops are a separate piece, available in a smaller and a larger size and in a crossed-helix version, for shoppers who prefer the helix wrapped into a hoop rather than hanging from a leverback. The DNA necklace is the matching pendant for anyone building a fuller set.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":49518912327,"sku":"ER0023-S","price":190.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/dna-earrings-silver-earrings-science-jewelry-sciencejewelry1824-51357049160028.png?v=1698825308"},{"product_id":"bacteriophage-earrings","title":"bacteriophage earrings | silver","description":"\u003ch2\u003eBacteriophage earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you teach microbiology or molecular biology, the bacteriophage is usually the first model organism you put in front of students. T-series phages taught the field that DNA is the genetic material, that the code is read in triplets, and how a virus actually assembles. Simple enough for a semester, complex enough that phage research still lands in high-impact journals.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science of the Bacteriophage\u003c\/h2\u003e\n\u003cp\u003eBacteriophages are viruses that infect bacteria, and they are the most abundant biological entity on Earth. Twort discovered them in 1915. D'Hérelle independently rediscovered and named them two years later. The Hershey-Chase experiment in 1952 used radioactively labelled T2 phage to prove that DNA, not protein, carries genetic information. T4 phage went on to become the model for viral structure, the lytic cycle, and the regulation of replication. Phage display now drives selection of proteins and peptides with specific binding properties. Phage therapy is back in serious clinical conversation as multi-drug resistance worsens, with FDA compassionate-use approvals and active trials. Lysogenic phages and lateral gene transfer remain central to bacterial evolution.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cp\u003eThe audience clusters around microbiology and virology:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003emicrobiologists and molecular biologists teaching the central dogma\u003c\/li\u003e\n\u003cli\u003ephage researchers and phage therapy specialists\u003c\/li\u003e\n\u003cli\u003evirologists studying viral structure and assembly\u003c\/li\u003e\n\u003cli\u003eundergraduate biology teachers and doctoral students\u003c\/li\u003e\n\u003cli\u003einfectious disease pharmacists exploring phage-based therapeutics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often given alongside the silver bacteriophage necklace as a paired set for a department gift, or matched with another virus or phage design as a collection.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Cellular Biology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/bacteriophage-18k-gold-plated\"\u003eBacteriophage necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/coronavirus\"\u003eCoronavirus necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/tardigrade-earrings\"\u003eTardigrade earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWill a microbiologist recognise this?\u003c\/h3\u003e\n\u003cp\u003eImmediately. The T4 phage structure is one of the most iconic images in molecular biology. Anyone who has taught or studied molecular biology, genetics, or virology will recognise it on sight. It reads as a peer-specific piece rather than generic science jewelry, especially for researchers and educators whose work touches phage biology or the history of molecular discoveries.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy did the Hershey-Chase experiment use phage?\u003c\/h3\u003e\n\u003cp\u003eBecause phage are simple. T2 phage infect bacteria, inject their genetic material, and take over the cell machinery to make new phages. By labelling phage protein with radioactive sulphur and phage DNA with radioactive phosphorus, Hershey and Chase could track which molecule entered the bacterial cell and directed replication. The radioactive phosphorus alone appeared in the offspring phage, proving DNA was the genetic material. The elegance of the experiment lay in the simplicity of the system and the directness of the question it answered.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the size, material, and earring type?\u003c\/h3\u003e\n\u003cp\u003e23 mm pendants in 925 sterling silver, nickel-free, with leverback hooks (no posts, no chain). Ships free worldwide via DHL Express in 1-5 business days, with all import duties prepaid. Comes in a ready-to-gift jewelry box with the 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold or different format version?\u003c\/h3\u003e\n\u003cp\u003eThe bacteriophage necklace is available in gold vermeil and silver if a pendant format is preferred. These earrings are leverback hooks only. Custom formats (studs, different materials) can be explored through the custom jewelry form.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":52976940615,"sku":"ER0008-S","price":180.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/bacteriophage-earrings-silver-earrings-science-jewelry-sciencejewelry1824-51402647830876.png?v=1699274232"},{"product_id":"purkinje-cell-earrings","title":"purkinje cell earrings | silver","description":"\u003ch2\u003ePurkinje cell earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe Purkinje cell is the largest neuron in the cerebellum and the most elaborate dendritic tree in the vertebrate brain. Where motor learning lives, worn here as a 39 mm sterling silver leverback earring for cerebellar specialists and those who know the climbing-fibre teaching signal by heart.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Purkinje Cell\u003c\/h2\u003e\n\u003cp\u003ePurkinje cells are GABA-ergic neurons forming a single layer between the molecular and granular layers of cerebellar cortex. Their dendritic trees are planar and elaborate, extending up to 200,000 parallel-fibre synapses on a single cell. Each Purkinje cell is the sole output of the cerebellar cortex, projecting to the deep cerebellar nuclei and from there to thalamus, motor cortex, brainstem, and spinal cord. They receive input from one climbing fibre originating in the inferior olive and hundreds of thousands of parallel fibres from granule cell axons. Long-term depression at the parallel-fibre-Purkinje synapse, triggered by climbing-fibre activity, is the cellular substrate of cerebellar motor learning. Loss of Purkinje cells defines spinocerebellar ataxia and other cerebellar disorders.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ecerebellar neuroscientists working on motor learning, timing, and coordination\u003c\/li\u003e\n\u003cli\u003emovement-disorder neurologists treating spinocerebellar ataxia and cerebellar pathology\u003c\/li\u003e\n\u003cli\u003eneuroanatomists who teach the cerebellum and recognise this cell type at a glance\u003c\/li\u003e\n\u003cli\u003egraduate students whose thesis touches climbing-fibre or parallel-fibre physiology\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who can sketch the dendritic tree from memory and knows that motor learning happens at the parallel-fibre synapse.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Neuroscience Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell\"\u003ePurkinje cell necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell-18k-gold-plated\"\u003ePurkinje cell necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron\"\u003eNeuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/brain-sagittal\"\u003eSagittal brain necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spindle-neuron\"\u003eSpindle neuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is special about the Purkinje cell's dendritic tree?\u003c\/h3\u003e\n\u003cp\u003eTwo defining features. First, the dendrites are planar. They fan out in a single plane perpendicular to the parallel fibres, allowing the Purkinje cell to integrate inputs from a long line of granule cells along that axis. Second, the parallel-fibre synapse count reaches approximately 200,000 per cell, the highest of any vertebrate neuron. This computational capacity, combined with the climbing-fibre teaching signal from the inferior olive, makes the Purkinje cell the textbook example of supervised learning at the cellular level.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy choose the Purkinje cell earrings over generic neuron pendants?\u003c\/h3\u003e\n\u003cp\u003eThe Purkinje cell is a specialist call within neuroscience. The generic neuron is the foundational unit recognised across the field. The Purkinje cell is recognised by people whose work specifically engages with cerebellar physiology, motor learning, or movement-disorder pathology. Buying the Purkinje cell earrings tells the recipient you know the cell type they think about daily, not just the cell type that fits on a textbook cover.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are these earrings and what comes with them?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 39 mm leverback earrings. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a Purkinje cell pendant necklace as well?\u003c\/h3\u003e\n\u003cp\u003eYes. The same Purkinje cell is available as a \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell\"\u003enecklace pendant in sterling silver\u003c\/a\u003e at 47 mm and as a \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell-18k-gold-plated\"\u003enecklace in gold vermeil\u003c\/a\u003e. The earrings suit daily lab or clinical wear, while the pendants work well for seminars or milestone celebrations in cerebellar neuroscience.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":1777813618695,"sku":"ER0044-S","price":200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/016_purkinje_earrings.png?v=1700035711"},{"product_id":"antibody-earrings","title":"antibody earrings | silver","description":"\u003ch2\u003eantibody earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you can generate 100 billion different antibodies from a single B cell through somatic hypermutation and combinatorial rearrangement, you already know why the Y-shaped immunoglobulin is worn by immunologists and cell biologists. Two antibodies, one for each ear, a pair for someone whose work is recognising and binding antigens.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Antibody\u003c\/h2\u003e\n\u003cp\u003eEach antibody is a Y-shaped immunoglobulin built from two heavy chains and two light chains joined by disulfide bonds. The Fab arms bind antigens with exceptional specificity, a product of somatic hypermutation and combinatorial gene rearrangement. A single B cell clone can produce over 100 billion distinct antibody sequences through somatic hypermutation alone, with the hypervariable complementarity-determining regions changing with each iteration. These earrings render that molecular precision in sterling silver, honouring a system that can respond to almost any pathogen.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Audience\u003c\/h2\u003e\n\u003cp\u003eFor anyone who appreciates the elegance of the immune system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eimmunologists, cell biologists, and biomedical researchers\u003c\/li\u003e\n\u003cli\u003estudents and academics finishing a science degree\u003c\/li\u003e\n\u003cli\u003ehealthcare professionals who want to carry something from their field\u003c\/li\u003e\n\u003cli\u003eanyone who works with antibodies in the lab or clinic\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Immunology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/antibody\"\u003eAntibody necklace in sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/antibody-studs\"\u003eAntibody studs in sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/red-blood-cell-studs\"\u003eRed blood cell studs in sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat do you wear when your work is immunity?\u003c\/h3\u003e\n\u003cp\u003eAntibody earrings. Y-shaped immunoglobulin structures with hypervariable Fab regions capable of recognising almost any foreign antigen. Any biomedical researcher or immunologist will understand immediately.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is somatic hypermutation such a powerful mechanism?\u003c\/h3\u003e\n\u003cp\u003eSomatic hypermutation introduces targeted mutations into antibody genes, generating over 100 billion possible sequences from a single B cell clone. The complementarity-determining regions can change with each iteration, allowing the immune system to generate antibodies with binding affinities that improve over time. This is why your immune response gets stronger against pathogens you have encountered before.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat are the material and size?\u003c\/h3\u003e\n\u003cp\u003e15 mm sterlig silver leverback hooks, 925 sterling silver, nickel-free and hypoallergenic, high-polish finish. Ships free worldwide via DHL Express in 1-5 business days. Comes in a ready-to-gift jewelry box with all import duties covered and the 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eCan I exchange if the fit is off?\u003c\/h3\u003e\n\u003cp\u003eYes. All our earrings are covered by a 30-day Love It or Return It policy. If the fit or style do not suit you, we will help you find an alternative or process a return.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":1784294506503,"sku":"ER0005-S","price":150.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/antibody-earrings-silver-earrings-science-jewelry-sciencejewelry1824-51402631020892.png?v=1699274049"},{"product_id":"petri-dish-earrings","title":"petri dish earrings | silver","description":"\u003ch2\u003ePetri dish earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIn 1887 Julius Richard Petri, working as Robert Koch's assistant at the Royal Prussian Institute for Infectious Diseases in Berlin, designed the cylindrical glass dish that now carries his name. Microbiology became standardised in a single year. Worn here as 20 mm sterling silver leverback earrings.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Petri Dish\u003c\/h2\u003e\n\u003cp\u003eJulius Petri's 1887 dish was a small, flat, cylindrical container with a slightly larger overlapping lid that protects the culture surface from airborne contamination while permitting gas exchange. Before Petri, microbial culture relied on flat plates, gelatin sheets, or sealed flasks, none of which combined sterility, observability, and routine handling. The Petri dish enabled the standard streak-plate technique that allowed isolation of pure bacterial strains, which in turn made Koch's postulates operationally useful and helped establish the germ theory of disease. The basic design has barely changed: 90 to 100 mm glass dishes were standard for nearly a century, with disposable plastic versions taking over from the 1960s. The dish remains a daily working tool across clinical microbiology, environmental microbiology, food safety testing, antibiotic susceptibility testing, and microbiology teaching laboratories.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Audience\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003emicrobiologists across clinical, environmental, food, and industrial subfields\u003c\/li\u003e\n\u003cli\u003elaboratory technicians and biomedical scientists running daily plate work\u003c\/li\u003e\n\u003cli\u003einfectious-disease physicians and clinical microbiologists\u003c\/li\u003e\n\u003cli\u003emicrobiology educators and graduate students learning culture techniques\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often picked by working microbiologists who have streaked enough plates to recognise good colony separation by sight, with the rest going to gift-givers buying for someone whose research career is built on plate-based microbial isolation.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Medical and Lab Tools Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/microscope-earrings\"\u003eMicroscope earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/eppendorf-earrings\"\u003eEppendorf earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/scalpel-earrings\"\u003eScalpel earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/microscope\"\u003eMicroscope necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/syringe\"\u003eSyringe necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre these for working microbiologists or for science enthusiasts?\u003c\/h3\u003e\n\u003cp\u003eAbout a third of orders ship to working microbiologists or laboratory technicians who handle plates daily. The rest go to gift-givers buying for a microbiology graduate, a clinical microbiology fellow, or a recipient whose research career is built on plate-based microbial isolation. The earrings work cleanly in either context. The piece reads as the working tool rather than as a generic biology reference.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy has the Petri dish design barely changed since 1887?\u003c\/h3\u003e\n\u003cp\u003eBecause the basic geometry already solves the practical problems of routine microbiology. A flat plate gives observable colonies and easy access for streaking. A slightly larger overlapping lid prevents airborne contamination while allowing gas exchange. A small, stackable form factor fits incubators efficiently. The plastic disposable variants from the 1960s changed the material but not the dimensions or the working principle. Specialised variants exist (compartmented plates, triple-vented plates, glass-bottom plates for microscopy) but the standard 90 to 100 mm dish covers most of microbiology.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are the earrings and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 20 mm Petri dish earrings on sterling silver leverback hooks. Nickel-free and hypoallergenic, no chain. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a necklace version?\u003c\/h3\u003e\n\u003cp\u003eNot at present. The Petri dish design is currently available as silver leverback earrings only. Other Medical and Lab tools designs in the catalogue exist as both pendants and earrings, including the \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/microscope\"\u003emicroscope\u003c\/a\u003e + \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/microscope-earrings\"\u003emicroscope earrings\u003c\/a\u003e set, if a matched pendant-and-earring format is the goal.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":1784320393223,"sku":"ER0043-S","price":195.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/015_petridish_earrings.png?v=1700035635"},{"product_id":"cloning-vector-earrings","title":"cloning vector earrings | silver","description":"\u003ch2\u003eCloning vector earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe same circular plasmid that founded recombinant DNA biology, in earring format. A pair of 20 mm sterling silver hoops carrying the iconic vector shape on each ear, sized for daily wear rather than statement piece. The molecular biology lab equivalent of wearing your tools on the way out the door.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Cloning Vector\u003c\/h2\u003e\n\u003cp\u003eA cloning vector is a small circular DNA molecule used to carry foreign genetic material into a bacterial host for replication and study. The vector carries an origin of replication, a selectable marker like antibiotic resistance, and a multiple cloning site with restriction enzyme recognition sequences for inserting the gene of interest. The Cohen-Boyer experiment in 1973, ligating tetracycline-resistance fragments into the pSC101 plasmid and recovering them from E. coli, was the founding moment for recombinant DNA biology. pBR322 and pUC19 followed as standard research workhorses. Modern descendants include shuttle vectors that cross between bacterial and mammalian hosts, expression vectors with strong promoters, and lentiviral vectors for stable mammalian integration. The plasmid map is the working object of any molecular biology lab.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003emolecular biologists who already own the cloning vector pendant and want a daily-scale pair\u003c\/li\u003e\n\u003cli\u003eprotein expression and biopharma scientists\u003c\/li\u003e\n\u003cli\u003egraduate students at the start or end of a cloning-heavy thesis\u003c\/li\u003e\n\u003cli\u003ecore-facility scientists and lab managers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAbout a third of orders ship to working molecular biologists or biotech researchers. The rest are gifts to graduate students at thesis milestones or to colleagues who already have the pendant version.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Medical \u0026amp; Lab Tools Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cloning-vector\"\u003eCloning vector necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cloning-vector-necklace-gold-vermeil\"\u003eCloning vector necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/eppendorf-earrings\"\u003eEppendorf earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/petri-dish-earrings\"\u003ePetri dish earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/microscope-earrings\"\u003eMicroscope earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy earrings rather than the necklace pendant?\u003c\/h3\u003e\n\u003cp\u003eThe earrings sit at a quieter daily scale on the ear, where the necklace pendant carries the vector at chest height. Buyers picking the earrings often already own the pendant or want a more subtle nod to the daily working object of their lab. The earring pair also works well alongside the eppendorf, petri dish, or microscope earrings as a small lab-tools set built up over time.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is the cloning vector iconic enough to be jewelry?\u003c\/h3\u003e\n\u003cp\u003eBecause the plasmid map has been the standard daily working object of molecular biology for fifty years. Any researcher running cloning workflows looks at vector maps multiple times a day, designing inserts, tracking restriction sites, planning ligation reactions. The shape becomes shorthand for the work. A piece of jewelry that captures it reads as a daily-life reference rather than a generic science motif.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are the earrings and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 20 mm pendants on sterling silver leverback hooks. Nickel-free and hypoallergenic, no chain. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre there pendant versions, or only earrings?\u003c\/h3\u003e\n\u003cp\u003eBoth. The cloning vector is available as a \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cloning-vector\"\u003esterling silver pendant\u003c\/a\u003e and in \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cloning-vector-necklace-gold-vermeil\"\u003e18K gold vermeil pendant\u003c\/a\u003e at the same 20 mm scale. The earrings are silver only. The three formats often go together as a set for a graduation gift.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":1901263224839,"sku":"ER0013-S","price":180.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/cloning-vector-earrings-silver-earrings-science-jewelry-sciencejewelry1824-51402652909916.png?v=1699274227"},{"product_id":"microscope-earrings","title":"microscope earrings | silver","description":"\u003ch2\u003eMicroscope earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eAntonie van Leeuwenhoek looked through a single-lens microscope of his own design in 1676 and saw bacteria for the first time. Nothing in biology was the same after that. These 18 mm sterling silver leverback earrings carry the instrument that made microbiology, histology, and most of cell biology possible. For someone who works at one daily.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Microscope\u003c\/h2\u003e\n\u003cp\u003eThe compound microscope was developed in the late 16th century in the Netherlands, with the first practical instrument attributed to Zacharias Janssen around 1590. Antonie van Leeuwenhoek in Delft, working between 1674 and 1683 with a single-lens microscope of his own construction, made the first observations of bacteria, red blood cells, sperm cells, and protozoa. He communicated the findings to the Royal Society of London, which verified them and published them in the Philosophical Transactions. Achromatic lenses arrived in the 19th century and eliminated the chromatic aberration that had limited resolution since Janssen. Electron microscopes now resolve atomic-scale structures, but the optical microscope Van Leeuwenhoek perfected remains the daily instrument of histology, microbiology, and cell biology.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003emicrobiologists and cell biologists who work at the microscope every day\u003c\/li\u003e\n\u003cli\u003ehistopathologists and clinical laboratory scientists\u003c\/li\u003e\n\u003cli\u003ebiology and medicine students in lab-based programmes\u003c\/li\u003e\n\u003cli\u003eeducators teaching cell biology or histology\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAbout a third of orders ship to working laboratory scientists. The rest go to gift-givers picking the instrument that defines someone's daily work.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Medical \u0026amp; Lab Tools Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/microscope\"\u003eMicroscope necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/microscope-18k-gold-plated\"\u003eMicroscope necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/microscope-1\"\u003eMicroscope bracelet charm | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/eppendorf-earrings\"\u003eEppendorf earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/petri-dish-earrings\"\u003ePetri dish earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy earrings rather than the microscope necklace?\u003c\/h3\u003e\n\u003cp\u003eSmaller, more daily, less ceremonial. The necklace works as a single statement piece. The earrings sit at a quieter scale and pair well with other lab-themed jewelry. People who already have a microscope necklace often pick up the earrings as the everyday version. People who prefer earrings over chains pick them up as the primary piece.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy an optical microscope rather than an electron one?\u003c\/h3\u003e\n\u003cp\u003eBecause the optical microscope is the daily instrument. Histopathology, clinical microbiology, parasitology, basic teaching laboratories, and most cell biology still run on light microscopes. Electron microscopes resolve smaller structures but live in dedicated facilities, used for high-resolution work rather than routine examination. The earrings carry the working tool, not the speciality instrument.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are the earrings and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver. Each microscope is 18 mm, suspended from a sterling silver leverback hook. Nickel-free and hypoallergenic, no chain. Ships free worldwide via DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs the microscope available in other formats?\u003c\/h3\u003e\n\u003cp\u003eYes. A microscope necklace exists in both sterling silver and 18K gold vermeil at a larger pendant size, plus a Pandora-compatible bracelet charm in sterling silver. Buyers building a microbiology or histology collection sometimes pick up the earrings alongside the necklace.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":1979435745287,"sku":"ER0038-S","price":185.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/010_microscope_earrings.png?v=1700035411"},{"product_id":"femur-earrings","title":"femur earrings | silver","description":"\u003ch2\u003efemur earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe femur is the longest and strongest bone in the human skeleton, the load-bearing centrepiece of the lower limb. As paired earrings, the design echoes the body's natural left-right symmetry. One femur on each side of the head, mirroring the femora that carry weight from hip to knee with every step.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Anatomy of the Femur\u003c\/h2\u003e\n\u003cp\u003eThe femora are mirror images, each transmitting half the body's weight during stance and dynamic load during gait. Small differences in femoral neck angle, anteversion, or length measurably affect gait mechanics and lower back loading. Orthopaedic surgeons restore leg length equality with precision because even millimetre differences disrupt biomechanics downstream. The femur connects the hip (acetabulum) to the knee (tibial plateau and patella), making it the structural link between the body's two largest weight-bearing joints. Femoral fractures, hip arthroplasty, and intramedullary nailing are core orthopaedic procedures.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eorthopaedic surgeons and physiotherapists\u003c\/li\u003e\n\u003cli\u003eanatomists and osteologists\u003c\/li\u003e\n\u003cli\u003edancers and movement specialists\u003c\/li\u003e\n\u003cli\u003emedical students who have studied skeletal mechanics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Human Anatomy Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/femur-1\"\u003eFemur necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/femur-necklace-gold-vermeil\"\u003eFemur necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/femur\"\u003eFemur ring | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat do bone earrings say about the wearer?\u003c\/h3\u003e\n\u003cp\u003eThey say you understand skeletal anatomy and you are not afraid to wear something precise. Bone earrings are playful and specific at the same time. A physiotherapist will look twice. A surgeon will recognize the structure immediately.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is femoral symmetry important?\u003c\/h3\u003e\n\u003cp\u003eEach femur bears half the body's weight during walking and standing. Even small asymmetries (in neck angle, length, or anteversion) cascade through the kinetic chain, affecting ankle alignment, knee tracking, and hip loading. Restoring leg length equality after hip surgery is a core principle in orthopaedics.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the material and earring type?\u003c\/h3\u003e\n\u003cp\u003e24 mm pendant in 925 polished sterling silver, nickel-free and hypoallergenic. Sterling silver leverback hooks for secure, comfortable wear. High-polish finish. Comes in a ready-to-gift, eco-friendly jewelry box with the 30-day “Love It or Return It” policy. Free worldwide DHL Express shipping (1-5 business days).\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre there other bone earrings?\u003c\/h3\u003e\n\u003cp\u003eYes. We offer other anatomical earrings. Check the Human Anatomy section for similar paired designs in different bones.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":6907303755839,"sku":"ER0030-S","price":185.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/008_femur_earrings.png?v=1700035036"},{"product_id":"mix-n-match-dopamine-serotonin","title":"dopamine serotonin earrings | silver","description":"\u003ch2\u003eDopamine-serotonin earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you have spent time in a psychiatry clinic or a psychopharmacology lab, the two molecules that come up most often are dopamine and serotonin. Together they cover most of the prescriptions written for mood disorders and most of the receptors anyone reaches for when explaining how the brain regulates feeling. Worn here as silver hoop earrings, one per ear.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Dopamine and Serotonin\u003c\/h2\u003e\n\u003cp\u003eDopamine and serotonin are both monoamine neurotransmitters that modulate broad neural circuits through volume transmission rather than precise point-to-point signalling. Their functional territories overlap. Both influence mood, cognition, reward, and arousal through different receptor families and different anatomical projections. The drugs that have most shaped modern psychiatry act on one or both: SSRIs for depression and anxiety, dopamine agonists for Parkinson's, stimulants for ADHD, antipsychotics for schizophrenia and mood instability. Wearing them as a paired set carries the two-molecule foundation of most of neuropsychopharmacology in two earrings.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Audience\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eneuroscientists and psychopharmacologists\u003c\/li\u003e\n\u003cli\u003epsychiatrists and clinical psychologists\u003c\/li\u003e\n\u003cli\u003escience educators teaching neurotransmitter systems\u003c\/li\u003e\n\u003cli\u003eanyone who wants the dopamine-serotonin pair as a paired set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOne for each ear: the pair that runs most of clinical psychopharmacology, in a paired format that mirrors the way the two systems work together in the brain.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin-vertical\"\u003eSerotonin necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/fluoxetine\"\u003eFluoxetine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/psilocybin\"\u003ePsilocybin necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/mix-n-match-adenine-thymine\"\u003eAdenine-thymine earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/mix-n-match-cytosine-guanine\"\u003eCytosine-guanine earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy pair dopamine and serotonin rather than picking one?\u003c\/h3\u003e\n\u003cp\u003eBecause the clinical reality of mood and behaviour involves both. Most psychiatric medications target one or the other and often both. The two systems modulate each other in the prefrontal cortex, the basal ganglia, and the brainstem nuclei. A serotonin-only pendant or a dopamine-only pendant captures half of the picture. The earring pair captures the way the two are studied, prescribed, and thought about in working clinical neuroscience.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy are these two specifically the foundation of psychopharmacology?\u003c\/h3\u003e\n\u003cp\u003eBecause the drugs that work act on these systems. SSRIs raise synaptic serotonin. Stimulants and dopamine agonists raise dopamine. Antipsychotics block dopamine receptors and often serotonin receptors too. MDMA releases both. The full receptor pharmacology is more complicated, but the headline molecules are dopamine and serotonin. A psychiatrist who prescribes outside the noradrenaline and GABA systems is mostly working with these two.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are the earrings and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver. Each pendant is 15 mm, suspended from a 17.5 mm sterling silver hoop. Nickel-free and hypoallergenic, no chain. Ships free worldwide via DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre there matching DNA earring sets?\u003c\/h3\u003e\n\u003cp\u003eYes. The adenine-thymine and cytosine-guanine earring sets follow the same paired format, with one base per ear, in sterling silver. Buyers who want a paired-molecule earring collection sometimes pick up the dopamine-serotonin set alongside the DNA base pairs.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":7136448938047,"sku":"ER0026-S","price":150.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/dopamine-serotonin-earrings-silver-earrings-science-jewelry-sciencejewelry1824-51402720837980.png?v=1699274971"},{"product_id":"eppendorf-earrings","title":"eppendorf earrings | silver","description":"\u003ch2\u003eeppendorf earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eSix hours a day in the non-dominant hand. PhDs are partly measured in tubes handled (pipetted into, vortexed, centrifuged, frozen, thawed). This particular tube has been every molecular biologist's bench partner since the 1970s, doing the same job whether the experiment is a Western blot, a CRISPR screen, or a sample heading into mass spectrometry.\u003c\/p\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind the Eppendorf Tube\u003c\/h2\u003e\n\u003cp\u003eThe standard 1.5 mL polypropylene microcentrifuge tube became universal in molecular biology for three reasons. First, polypropylene is chemically inert across the pH and solvent range of most biology assays. Second, the conical base concentrates pelleted material at a single point under centrifugation, which makes DNA precipitation, protein concentration, and cell pelleting reproducible. Third, the snap-cap with a friction-fit hinge withstands repeated freeze-thaw cycles without leaking. By the time PCR and DNA sequencing went mainstream in the late 1980s, the format was already standard. Today, several billion tubes are manufactured each year, in a dozen sizes, with the 1.5 mL version still the workhorse.\u003c\/p\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cp\u003eBench science has its own uniform, and it now stretches to a tiny pair of tubes on each ear.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003emolecular biologists and biochemists\u003c\/li\u003e\n\u003cli\u003ePhD students at any career stage\u003c\/li\u003e\n\u003cli\u003elab technicians and senior bench scientists\u003c\/li\u003e\n\u003cli\u003escience communicators and lab life photographers\u003c\/li\u003e\n\u003cli\u003ebiotech and pharmaceutical R\u0026amp;D scientists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe most-asked question about these earrings is below.\u003c\/p\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Lab Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/eppendorf\"\u003eeppendorf necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/eppendorf-18k-gold-plated\"\u003eeppendorf necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/petri-dish\"\u003epetri dish necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/pipette\"\u003epipette necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre these too niche to wear outside the lab?\u003c\/h3\u003e\n\u003cp\u003eFor most settings, no. At distance the tubes read as small geometric earrings. The reference lands close up, which works in academic and biotech-adjacent environments without standing out as costume. People outside molecular biology rarely identify what they are without prompting. People inside it usually get there in under three seconds.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy exactly 1.5 mL?\u003c\/h3\u003e\n\u003cp\u003eIt became the default by convention rather than by design. Eppendorf AG manufactured tubes in several sizes in the 1960s and 1970s, but the 1.5 mL size proved the most useful for nucleic acid and protein work, where typical reaction volumes sit between 10 µL and 1 mL. Centrifuge rotors got built around it. The size locked in once the rotor designs locked in.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eSize, material, type?\u003c\/h3\u003e\n\u003cp\u003e24 mm in 925 polished sterling silver, nickel-free and hypoallergenic, with sterling silver leverback hooks. High-polish finish. Free DHL Express shipping worldwide in 1-5 business days, all duties and taxes covered, 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a necklace or gold version?\u003c\/h3\u003e\n\u003cp\u003eThe eppendorf necklace exists in both sterling silver (31 mm) and 18k gold vermeil (31 mm). The earrings format is currently silver only. A gold vermeil version of the earrings can be made on request through our custom design service (around 4-6 weeks total).\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":7341801668671,"sku":"ER0028-S","price":190.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/019_eppendorf_earrings.png?v=1700035947"},{"product_id":"mix-n-match-t3-t4","title":"T3 - T4 earrings | silver","description":"\u003ch2\u003eT3 - T4 earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you have ever discussed thyroid hormone replacement with a patient or argued about levothyroxine dosing in endocrinology rounds, this pair will land. Two molecules, two iodine counts, two functional roles, paired on the ears as the body uses them.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind T3 and T4\u003c\/h2\u003e\n\u003cp\u003eThyroxine (T4) is the prohormone secreted predominantly by the thyroid. Triiodothyronine (T3) is the active form generated by peripheral deiodination via the DIO1, DIO2, and DIO3 enzymes. T3 enters cells, binds TRalpha and TRbeta nuclear receptors, and regulates transcription of hundreds of genes affecting metabolism, heart rate, and development. Standard hypothyroidism treatment replaces T4 only and relies on adequate peripheral conversion. The clinical debate over combination T3\/T4 therapy reflects real variation in conversion efficiency, particularly in patients homozygous for the DIO2 Thr92Ala polymorphism, who may experience persistent symptoms despite normalised TSH on T4 monotherapy.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cp\u003eThyroid medicine has its own steady audience.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eendocrinologists and thyroid specialists\u003c\/li\u003e\n\u003cli\u003eendocrine nurses and clinical researchers\u003c\/li\u003e\n\u003cli\u003epatients with thyroid disease who identify with their replacement medication\u003c\/li\u003e\n\u003cli\u003epharmacology students working on nuclear receptor signalling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe most common pairing is the silver earrings with the matching T3-T4 ring, often given together as a thyroid-themed set.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/t3-t4-thyroid-hormones\"\u003eT3 - T4 ring | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/t3\"\u003eT3 thyroid hormone necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/t4\"\u003eT4 thyroid hormone necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/t3-thyroid-hormone-necklace-gold-vermeil\"\u003eT3 thyroid hormone necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/t4-thyroid-hormone-necklace-gold-vermeil\"\u003eT4 thyroid hormone necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWho tends to wear thyroid hormone earrings?\u003c\/h3\u003e\n\u003cp\u003eEndocrinologists, thyroid patients, and biochemists working on nuclear receptor pharmacology. The audience is narrower than for general molecule jewelry, but the recognition rate within that audience is unusually high.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy are T3 and T4 worn as separate earrings?\u003c\/h3\u003e\n\u003cp\u003eBecause they function as a pair. T4 is the reservoir, T3 is the active form, and the body converts between them constantly. Wearing them on separate ears reflects the system as a coupled pair rather than as a single molecule.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat about size, material, and ear sensitivity?\u003c\/h3\u003e\n\u003cp\u003e33 mm pair on 17.5 mm sterling silver hoops, nickel-free, hypoallergenic. Free worldwide DHL Express, 1-5 business days, duties and taxes covered. 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a matching ring or necklace?\u003c\/h3\u003e\n\u003cp\u003eYes. The catalog has T3 and T4 each as separate necklaces in silver or gold vermeil (37 mm pendants), and a T3-T4 ring in silver. The earrings are the format for someone who wants the molecules close to the head, where the receptors actually are.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":8698490486847,"sku":"ER0053-S","price":150.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/035_T3T4earrings.png?v=1709035410"},{"product_id":"neuron-18k-gold-plated","title":"neuron necklace | gold vermeil","description":"\u003ch2\u003eNeuron necklace | 18K gold vermeil\u003c\/h2\u003e\n\u003cp\u003eIn 1906 the Nobel Prize in Physiology or Medicine was awarded jointly to Santiago Ramón y Cajal and Camillo Golgi, the two scientists whose decade-long disagreement about whether the brain is a continuous reticulum or a network of discrete cells settled the foundational question of neuroscience in Cajal's favour. Worn here as a 39 mm 18K gold vermeil pendant.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Neuron\u003c\/h2\u003e\n\u003cp\u003eThe neuron doctrine, the principle that the brain is composed of discrete cellular units rather than a continuous reticulum, was settled by Santiago Ramón y Cajal's silver-staining studies in the 1880s and 1890s. Cajal's silver impregnation revealed individual neurons in cortex, cerebellum, retina, and spinal cord, settling a long debate with Camillo Golgi (who maintained the reticular theory). The two shared the 1906 Nobel Prize in Physiology or Medicine. Each neuron computes through dendritic input integration, cell-body summation, and axonal action potential propagation, with myelination by oligodendrocytes (CNS) or Schwann cells (PNS) speeding conduction. Synapse counts in the human cortex run between 10¹⁴ and 10¹⁵. The diversity is enormous: pyramidal cells, interneurons, motor neurons, sensory neurons, Purkinje cells, granule cells, each tuned to a particular computational role.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eneuroscientists at career milestones across cellular, systems, and computational subfields\u003c\/li\u003e\n\u003cli\u003eretiring neurologists or clinical neuroscience consultants closing a long career\u003c\/li\u003e\n\u003cli\u003eacademic neuroscientists at major appointments or named lectureships\u003c\/li\u003e\n\u003cli\u003egraduate students at thesis defence or doctoral graduation in neuroscience\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often given on a neuroscience graduation, on retirement from a long clinical or academic career, or on a major appointment in a neuroscience-adjacent field.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Neuroscience Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron\"\u003eNeuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-earrings\"\u003eNeuron earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spindle-neuron\"\u003eSpindle neuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell\"\u003ePurkinje cell necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/sagittal-brain-18k-gold-plated\"\u003eSagittal brain necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy pick the gold neuron over the silver?\u003c\/h3\u003e\n\u003cp\u003eGold and silver mark different occasions in this catalogue. The gold neuron reads as recognition: graduation, retirement, named appointment, or the closing of a long teaching or clinical career. The silver neuron is the working-day pendant, the one a researcher or clinician wears at the bench or in the clinic. Same scale, same chain length, same iconic neuron. The choice is about what the gift is meant to mark, not about what the cell type represents in neuroscience.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat did Cajal and Golgi disagree about?\u003c\/h3\u003e\n\u003cp\u003eWhether the nervous system is a continuous syncytium of fused cells (Golgi's reticular theory) or a network of physically separate cells communicating through specialised contacts (Cajal's neuron doctrine). Cajal won the argument with technique. His refinement of Golgi's silver-staining method revealed cell-by-cell structure in cortex, cerebellum, and retina that the reticular theory could not accommodate. The synapse, the specialised contact between neurons, was named by Sherrington in 1897 and then visualised electron-microscopically by Sanford Palay in the 1950s. The 1906 joint Nobel acknowledged the technique even as it acknowledged that Cajal's interpretation was the correct one.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e18K gold vermeil over a sterling silver core, 39 mm pendant on a 45 cm gold vermeil chain (ø 1.8 mm) with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a silver version?\u003c\/h3\u003e\n\u003cp\u003eYes. The same neuron is available in \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron\"\u003esterling silver\u003c\/a\u003e at the same scale and chain length, with the silver carrying a quiet methodological link to Cajal's 1873 silver-staining technique. Many neuroscientists who own the gold version eventually pick up the silver for daily wear, or the other way round.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":12972519751743,"sku":"NK0238-GV","price":185.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/gold_vermeil_neuron_necklace.png?v=1727356414"},{"product_id":"horizontal-dna-18k-gold-plated","title":"DNA necklace H | gold vermeil","description":"\u003ch2\u003eDNA necklace H | 18k gold vermeil\u003c\/h2\u003e\n\u003cp\u003eThe double helix, in horizontal orientation, in 18k gold vermeil. Both backbones spiral at full width with the major and minor grooves visible. The form that makes the helix easiest to read.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind the DNA Helix\u003c\/h2\u003e\n\u003cp\u003eThe major groove and minor groove are the two channels running along the helix where the backbone strands are farther apart or closer together. The major groove is wide enough for proteins to read the sequence without opening the strands, which is how transcription factors find their target genes and how restriction enzymes locate their cut sites. Some antibiotics work by sliding into the minor groove and disrupting bacterial replication. The horizontal orientation captures both grooves clearly at scale.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Audience\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003emolecular biologists, structural biologists, and biophysicists\u003c\/li\u003e\n\u003cli\u003egenetics researchers and biotech professionals\u003c\/li\u003e\n\u003cli\u003ebiology and medical students through their first genetics rotation\u003c\/li\u003e\n\u003cli\u003escience teachers and communicators who draw the helix on a whiteboard for a living\u003c\/li\u003e\n\u003cli\u003eanyone whose work or family history makes the molecule personal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often bought by people who already own the silver version and want a more deliberate piece for outside the lab.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Genetics Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/horizontal-dna\"\u003eDNA necklace H | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna-18k-gold-plated\"\u003eDNA necklace V | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna\"\u003eDNA necklace V | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/interlocked-dna-18k-gold-plated\"\u003eInterlocked DNA necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the difference between the horizontal and vertical DNA necklaces?\u003c\/h3\u003e\n\u003cp\u003eThe molecule is the same. The orientation isn't. The horizontal version (H) is 30 mm wide and shows both backbones at full extension, with the major and minor grooves spread across the pendant. That's the form most people picture when they see DNA in a textbook. The vertical version (V) is 20 mm tall and shows the helix from end-on, which reads slightly more abstract on a chain. H tends to be the choice when people want the structure to be unmistakable. V tends to be the choice when they want it more discreet.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy do the major and minor grooves matter?\u003c\/h3\u003e\n\u003cp\u003eThe major groove is wide enough for proteins to read the DNA sequence without unwinding the helix. That's how every transcription factor finds its target gene, how restriction enzymes recognise their cut sites, and how some antibiotics target bacterial replication. The minor groove is narrower and harder for proteins to read directly, but several drugs slide into it and disrupt DNA function from there. The horizontal pendant shows both grooves clearly because the helix sits with its full width visible.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 30 mm wide, sized so both backbones and the grooves between them read clearly. It comes in 18k gold vermeil, a 2.5 micron gold layer over a sterling silver core, nickel-free and hypoallergenic, on a 45 cm gold-plated chain with a 5 cm extender and lobster clasp. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhich DNA necklace is right for me: the horizontal gold, the vertical gold, or one of the silver versions?\u003c\/h3\u003e\n\u003cp\u003eMost people pick by orientation first and material second. If you want the helix unmistakable from across a room, go horizontal. If you want it discreet, go vertical. After that, gold vermeil reads as the more deliberate choice and silver reads as the everyday one. The silver versions are the most-bought by lab researchers. The gold versions tend to be gifts or after-PhD pieces. All four are the same molecule, drawn the same way.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":12972716916799,"sku":"NK0096-GV","price":195.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/dna-necklace-h-gold-vermeil.png?v=1727075754"},{"product_id":"dna-18k-gold-plated","title":"DNA necklace V | gold vermeil","description":"\u003ch2\u003eDNA necklace V | 18k gold vermeil\u003c\/h2\u003e\n\u003cp\u003eA 20 mm vertical double helix in 18k gold vermeil. The pendant dangles from a single top loop, with the helix oriented in textbook-column form, the narrower of the two DNA orientations, the version drawn vertically rather than laid across the page.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind the Vertical Helix\u003c\/h2\u003e\n\u003cp\u003eThe vertical orientation is the way the double helix first appeared in print. Watson and Crick's 1953 Nature paper showed the structure as a vertical column rotating around its long axis, with base pairs stacking like rungs of a ladder between the two sugar-phosphate backbones. Every textbook since has reproduced that orientation. B-form DNA, the dominant biological structure rendered on this pendant, completes one full turn every ten base pairs and rises 3.4 nanometres per turn. The genetic code itself is universal: A pairs with T, G pairs with C, three-letter codons specify amino acids, and the same codons mean the same amino acids in a bacterium, a yeast cell, a fruit fly, and a human. Watson and Crick built their 1953 model on Erwin Chargaff's base-ratio rules and Rosalind Franklin's Photograph 51, the X-ray diffraction image that made the helical structure unambiguous. Franklin died of ovarian cancer in 1958, aged 37, before the Nobel Prize was awarded to Watson, Crick, and Wilkins in 1962.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cp\u003eThe molecule that unifies biology under a single structural principle, in the more discreet of the two orientations.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003emolecular biologists, geneticists, and biochemists\u003c\/li\u003e\n\u003cli\u003estructural biologists who actually work with the diffraction patterns\u003c\/li\u003e\n\u003cli\u003ebiology and medical students through their first genetics rotation\u003c\/li\u003e\n\u003cli\u003escience teachers and communicators who draw the helix on a whiteboard for a living\u003c\/li\u003e\n\u003cli\u003eanyone whose work or family history makes the molecule personal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often picked up as a milestone gift after a PhD or a thesis defence. Gold reads as the more deliberate choice, and the V orientation reads as the more discreet of the four configurations.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Genetics Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna\"\u003eDNA necklace V | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/horizontal-dna-18k-gold-plated\"\u003eDNA necklace H | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/horizontal-dna\"\u003eDNA necklace H | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/circular-dna-18k-gold-plated\"\u003eCircular DNA necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna-earrings-gold-vermeil\"\u003eDNA earrings | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the difference between the vertical and horizontal DNA necklaces?\u003c\/h3\u003e\n\u003cp\u003eThe molecule is identical. The orientation isn't, and neither is the way the chain attaches. The vertical version (V, this one) is 20 mm tall, with the helix oriented vertically and the chain attached at a single loop on top, so the pendant dangles in textbook-column orientation. The horizontal version (H) is 30 mm wide, with the helix laid horizontally and the chain attaching at two side loops, one at each end of the helix. Both show the molecule from the side. V tends to be picked when people want the structure more discreet. H tends to win when they want it unmistakable from across a room.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is the helix drawn this way?\u003c\/h3\u003e\n\u003cp\u003eWatson and Crick's 1953 paper showed the double helix in vertical orientation, and that became the canonical drawing, the form reproduced in every textbook ever since. The vertical pendant follows that convention. The horizontal version is the same molecule rotated and laid across the chain; the vertical version is the molecule as it first appeared in print, the way most scientists picture it the moment someone says \"DNA.\"\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 20 mm tall in 18k gold vermeil, a 2.5 micron gold layer over a sterling silver core, nickel-free and hypoallergenic, on a 45 cm gold vermeil chain (1.8 mm width, lobster clasp) with a 5 cm extender, so it sits at the collarbone or a little below. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhich DNA necklace is right for me: V gold, V silver, H gold, or H silver?\u003c\/h3\u003e\n\u003cp\u003ePick by orientation first, material second. If you want the helix discreet, go vertical (V). If you want it unmistakable from across a room, go horizontal (H). After that, gold vermeil reads as the more deliberate choice and tends to be picked as a milestone or a gift; silver reads as the everyday lab piece. The silver versions are most often bought by working scientists. The gold versions tend to mark a finished thesis or a tenured chair. All four are the same molecule, drawn the same way, sized to read clearly at the orientation chosen.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13092317855807,"sku":"NK0099-GV","price":165.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/dna-necklace-v-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51378181865820.png?v=1699013411"},{"product_id":"copy-of-dna-18k-gold-plated","title":"cardiac conduction system necklace | gold vermeil","description":"\u003ch2\u003eCardiac conduction system necklace | 18k gold vermeil\u003c\/h2\u003e\n\u003cp\u003eA signal starts in the sinoatrial node, sweeps across both atria, slows at the atrioventricular node, then races down the bundle of His and out through the Purkinje fibres to fire both ventricles in synchrony. That signal is the cardiac conduction system, the heart's electrical circuit. The pendant traces the entire path, in 18k gold vermeil.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind the Cardiac Conduction System\u003c\/h2\u003e\n\u003cp\u003eThe cardiac conduction system is the specialised electrical pathway that synchronises every heartbeat. The sinoatrial (SA) node, in the wall of the right atrium, is the heart's intrinsic pacemaker. The cells there depolarise spontaneously about 60 to 100 times a minute and set the rhythm. The signal spreads through both atria, then converges at the atrioventricular (AV) node, where it deliberately slows down to give the atria time to empty into the ventricles. From the AV node it travels into the bundle of His, which splits into left and right bundle branches, then fans out through the Purkinje fibres to depolarise the ventricular muscle in a coordinated wave from apex to base. Cardiac electrophysiology, the clinical specialty built around this system, uses catheter ablation to interrupt aberrant conduction circuits in atrial fibrillation, atrial flutter, ventricular tachycardia, and Wolff-Parkinson-White syndrome. The same anatomy that the pendant traces is the territory those catheters work in every day.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ecardiac electrophysiologists who ablate arrhythmias and implant pacemakers\u003c\/li\u003e\n\u003cli\u003ecardiologists, cardiac surgeons, and cardiac anaesthetists\u003c\/li\u003e\n\u003cli\u003ecardiac nurses, cardiac physiologists, and electrophysiology fellows\u003c\/li\u003e\n\u003cli\u003ecardiovascular researchers studying conduction biology, channelopathies, or arrhythmia genetics\u003c\/li\u003e\n\u003cli\u003emedical students whose first ECG made the system click\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often picked as a milestone gift after fellowship completion, after a first solo ablation, or for an electrophysiologist who has spent years inside this exact anatomy.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Cardiology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/electrical-circuit-of-heart\"\u003eCardiac conduction system necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heart-18k-gold-plated\"\u003eHeart necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heart-section-18k-gold-plated\"\u003eHeart section necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/aorta-18k-gold-plated\"\u003eAorta necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heartbeat-18k-gold-plated\"\u003eHeartbeat necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the cardiac conduction system, exactly?\u003c\/h3\u003e\n\u003cp\u003eThe specialised tissue inside the heart that generates and propagates the electrical impulse driving each beat. It is not the same as the coronary arteries (the blood supply to the heart muscle) or the cardiac chambers themselves. The conduction system has five named components: the sinoatrial node, the atrioventricular node, the bundle of His, the left and right bundle branches, and the Purkinje fibres. An arrhythmia almost always traces back to a specific point along that path. The pendant shows the full pathway from atrial origin down to the ventricular Purkinje network.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat does the pendant actually depict?\u003c\/h3\u003e\n\u003cp\u003eA stylised rendering of the conduction-system pathway rather than a literal anatomical view of the heart. The atrial conduction loops at the top, the bundle of His descends through the centre, and the Purkinje fibres fan out at the base. The pendant focuses on the electrical pathway itself. The chambers, valves, and surrounding heart muscle are not drawn, so the rendering reads more as a 3D version of the circuit diagram you'd see in a cardiology textbook than as a literal heart. That is closer to how electrophysiologists already think about the system.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 35 mm in 18k gold vermeil, a 2.5 micron gold layer over a sterling silver core, nickel-free and hypoallergenic, on a 45 cm gold vermeil chain (1.8 mm width, lobster clasp) with a 5 cm extender, so it sits at the collarbone or a little below. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the difference between this and the silver cardiac conduction necklace?\u003c\/h3\u003e\n\u003cp\u003eThe anatomy is identical: same circuit, same 35 mm scale, same conduction landmarks. Material is the only difference. The silver version tends to be the everyday EP-lab piece, worn into procedures, rounds, and clinic. The gold tends to mark a fellowship completion, a first independent ablation, or a long career in electrophysiology. Both ship on a 45 cm chain in matching material.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13092682563647,"sku":"NK0054-GV","price":185.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/cardiac-conduction-system-necklace-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51378483298652.png?v=1699015750"},{"product_id":"heartbeat-18k-gold-plated","title":"heartbeat necklace | gold vermeil","description":"\u003ch2\u003eHeartbeat necklace | gold vermeil\u003c\/h2\u003e\n\u003cp\u003eThe ECG trace is the densest single measurement in everyday medicine. From one line a clinician can read rhythm, conduction, ischaemia, electrolyte disturbances, and chamber strain. The gold vermeil version is the same line as the silver, in a warmer key.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science of the ECG Trace\u003c\/h2\u003e\n\u003cp\u003eThe trace on the pendant is one full cardiac cycle. The small upward bump is the P wave, atrial depolarisation. The tall, sharp QRS complex is the ventricles contracting, the moment that pushes blood out into the body. The rounded T wave that follows is repolarisation, the ventricles resetting. The whole cycle takes roughly 0.8 seconds at rest. From this single line a clinician can read rhythm, conduction, ischaemia, electrolyte disturbances, and chamber strain. It is the densest single measurement in everyday medicine, and the line has stayed iconic because it is the shape every healthy ECG draws.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cp\u003eThe audience is the same as the silver version, with a tone shift toward the more formal and the more deliberately worn:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ecardiologists, electrophysiologists, and cardiac surgeons\u003c\/li\u003e\n\u003cli\u003eICU and cardiac-care nurses, paramedics, and EMTs\u003c\/li\u003e\n\u003cli\u003emedical students and residents through cardiology rotations\u003c\/li\u003e\n\u003cli\u003efamily members marking a graduation, a fellowship, or a cardiology milestone\u003c\/li\u003e\n\u003cli\u003eanyone whose own heartbeat changed something they remember\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe gold tends to land as the gift version of the line, picked when the silver is already the working piece or when the moment calls for something a little more formal.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Cardiology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heartbeat\"\u003eHeartbeat necklace | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/anatomical-heart-necklace-gold-vermeil\"\u003eAnatomical heart necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/electrical-circuit-of-heart\"\u003eElectrical circuit of the heart necklace\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heart-section\"\u003eHeart section necklace | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eSame model as the silver heartbeat?\u003c\/h3\u003e\n\u003cp\u003eYes. Same 36 mm pendant, identical PQRST trace, identical proportions. Material is the only difference. The silver is the everyday clinical piece. The gold reads more formal and is more often picked as a milestone gift after a cardiology fellowship or a major cardiac milestone in the family.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the line on the pendant?\u003c\/h3\u003e\n\u003cp\u003eOne full PQRST cardiac cycle. The small upward bump is the P wave (atria firing), the tall spike is the QRS complex (ventricles contracting), and the rounded curve at the end is the T wave (ventricles repolarising). Roughly 0.8 seconds of electrical activity in a resting heart, captured as a single line. It is the same shape on every healthy ECG, which is why it works as a symbol.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e36 mm pendant in 18K gold vermeil (sterling silver core with 2.5 micron gold plating), nickel-free and hypoallergenic. 45 cm gold vermeil chain with a 5 cm extender. Ships free worldwide via DHL Express in 1-5 business days, with all import duties prepaid. Comes in a ready-to-gift jewelry box with the 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWill another clinician actually appreciate this?\u003c\/h3\u003e\n\u003cp\u003eYes. Most science-themed jewelry leans aesthetic and skips the medicine. This pendant is a clean, accurate PQRST. People who have read thousands of these tend to notice when the trace is right, and this one is.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13125915738175,"sku":"NK0171-GV","price":165.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/heartbeat-necklace-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51378199134556.png?v=1699191262"},{"product_id":"atlas-18k-gold-plated","title":"atlas necklace | gold vermeil","description":"\u003ch2\u003eAtlas necklace | 18k gold vermeil\u003c\/h2\u003e\n\u003cp\u003eThe atlas is named for the Titan condemned to hold up the heavens, because it holds up the skull. Greek anatomy gave it the name. Vesalius documented it in detail in De Humani Corporis Fabrica in 1543. The C1 vertebra has done the same job ever since. An atlas necklace, in 18k gold vermeil.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Anatomy of the Atlas (C1)\u003c\/h2\u003e\n\u003cp\u003eThe atlas is the most specialised vertebra in the spine. Unlike all other vertebrae, it has no body. It's a ring of bone with two lateral masses joined by anterior and posterior arches. Its superior articular facets receive the occipital condyles of the skull, forming the atlanto-occipital joint where nodding (the \"yes\" movement) happens. Below, the atlas rotates around the odontoid process of the axis (C2), forming the atlanto-axial joint responsible for rotation (the \"no\" movement). The atlas is vulnerable in axial-loading injuries: a Jefferson fracture, the classic atlas injury, typically occurs from diving into shallow water.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eanatomists, physiotherapists, and orthopaedic surgeons working with the cervical spine\u003c\/li\u003e\n\u003cli\u003espine surgeons and neurosurgeons who operate at C1\u003c\/li\u003e\n\u003cli\u003echiropractors and manual therapists\u003c\/li\u003e\n\u003cli\u003emedical students who have studied the atlanto-axial complex\u003c\/li\u003e\n\u003cli\u003epeople drawn to anatomy through its history rather than its illnesses\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe gold version tends to be picked when someone wants the bone, refined.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Anatomy Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/atlas\"\u003eAtlas necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cervical-vertebra-necklace-gold-vermeil\"\u003eCervical vertebra necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spine-18k-gold-plated\"\u003eSpine necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/skull\"\u003eSkull necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this an appropriate gift for a graduating spine surgeon?\u003c\/h3\u003e\n\u003cp\u003eOften a strong choice. Spine surgery is one of the few specialties where the atlas (C1) shows up almost daily, in cervical fusions, paediatric craniocervical instability, and atlanto-axial revisions. The piece has the substance to read as a personal gift rather than a generic medical one. A short note that names the case, the year, or the institution tends to land well.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is a Jefferson fracture, exactly?\u003c\/h3\u003e\n\u003cp\u003eA Jefferson fracture is a burst fracture of the atlas: the C1 ring breaks at multiple points (typically the anterior and posterior arches) under axial loading. The classic mechanism is diving head-first into shallow water, which transmits the body's deceleration force directly through the skull onto the atlas. The injury was first systematically described by Geoffrey Jefferson in 1920. Most are stable and treated conservatively in a hard collar; unstable cases require surgical fixation.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 26 mm wide in 18k gold vermeil, a 2.5 micron gold layer over a sterling silver core, nickel-free and hypoallergenic, on a 45 cm gold-plated chain with a 5 cm extender and lobster clasp. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the difference between the gold and silver atlas?\u003c\/h3\u003e\n\u003cp\u003eThe structure is identical: same dorsal view of the C1 vertebra, same 26 mm size. Material is the only difference. The gold reads as the more deliberate piece, often picked as a milestone or graduation marker. The silver tends to be the choice for clinic and daily wear. Most spine specialists buy the silver for clinic and the gold for events. Both ship on a 45 cm chain in matching material.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13168135929919,"sku":"NK0027-GV","price":175.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/atlas-necklace-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51378454036828.png?v=1699015392"},{"product_id":"serotonin-horizontal-18k-gold-plated","title":"serotonin necklace H | gold vermeil","description":"\u003ch2\u003eSerotonin necklace H | 18K gold vermeil\u003c\/h2\u003e\n\u003cp\u003eSerotonin is the molecule SSRIs target, the most-prescribed-against neurotransmitter in modern psychiatry. The horizontal version of the pendant is the gold milestone variant, the recognition-piece counterpart to the working silver-H. Worn here as a 26 mm 18K gold vermeil pendant.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Serotonin\u003c\/h2\u003e\n\u003cp\u003eSerotonin (5-hydroxytryptamine, 5-HT) was first isolated by Vittorio Erspamer in 1937 from intestinal enterochromaffin cells, then re-isolated and named in 1948 by Maurice Rapport, Arda Green, and Irvine Page from blood serum. About 90% of the body's serotonin sits in the gut, where it regulates motility. The neural fraction, synthesised in the raphe nuclei of the brainstem, projects widely across cortex and limbic structures and modulates mood, sleep, satiety, and impulse control. Selective serotonin reuptake inhibitors block the SERT transporter and have been the dominant treatment for major depression and several anxiety disorders for over thirty years. Triptans on 5-HT1B and 1D treat acute migraine, atypical antipsychotics depend on 5-HT2A modulation, and ondansetron on 5-HT3 covers chemotherapy-induced nausea.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003epsychiatrists working with major depression, anxiety, or SSRI pharmacology\u003c\/li\u003e\n\u003cli\u003eclinical psychologists and psychotherapists in pharmacology-adjacent practice\u003c\/li\u003e\n\u003cli\u003eneurologists at the migraine end of the serotonin axis\u003c\/li\u003e\n\u003cli\u003emedical and nursing students learning the SSRI class as the dominant antidepressant family\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often given on a psychiatry or neuropsychopharmacology milestone, where the gold-H reads as recognition rather than daily wear.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin-horizontal\"\u003eSerotonin necklace H | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin-vertical-18k-gold-plated\"\u003eSerotonin necklace V | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin-vertical\"\u003eSerotonin necklace V | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin-earring-hoops\"\u003eSerotonin earring hoops | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-interlocked-18k-gold-plated\"\u003eDopamine serotonin necklace H | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy pick the gold serotonin H over the silver?\u003c\/h3\u003e\n\u003cp\u003eThe most common reason is the milestone framing. Gold reads as recognition where silver reads as daily wear. Same 26 mm pendant, same chain length, same molecule. The choice marks an occasion: a psychiatry residency completion, a major appointment in psychopharmacology, or a marker for a long course of treatment the recipient wants to commemorate. The silver-H is the pair partner picked for the working day.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy does serotonin sit at the centre of psychiatric pharmacology?\u003c\/h3\u003e\n\u003cp\u003eBecause the serotonin system reaches further into clinical medicine than any other monoamine. SSRIs are the most-prescribed antidepressant class for major depression and several anxiety disorders. Triptans on 5-HT1B\/1D are the standard acute migraine treatment. Atypical antipsychotics depend on 5-HT2A modulation. The 5-HT3 receptor is the target of ondansetron in chemotherapy-induced nausea. One molecule, four distinct prescribing pillars across psychiatry, neurology, oncology, and primary care.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e18K gold vermeil over a sterling silver core, 26 mm pendant on a 45 cm gold vermeil chain (ø 1.8 mm) with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the difference between H and V serotonin in gold?\u003c\/h3\u003e\n\u003cp\u003eThe orientation, not the molecule. The horizontal (H) version sits across the chest with the longer dimension running left-to-right. The vertical (V) version hangs along the chest axis with the longer dimension running top-to-bottom. Same molecule, same chain length, same 18K gold vermeil. H tends to suit fuller necklines and a more conversational visual. V tends to suit longer necklines and a more formal hang.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13211012923455,"sku":"NK0325-GV","price":155.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/serotonin-necklace-h-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51379587973468.png?v=1699267637"},{"product_id":"awareness-ribbon","title":"awareness ribbon necklace | silver","description":"\u003ch2\u003eAwareness ribbon necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIn 1991 the Visual AIDS Artists' Caucus pinned looped red ribbons to their lapels at the Tony Awards. Within a year the looped ribbon had become the standard symbol of solidarity for any cause anyone wanted to attach a colour to.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Awareness Ribbon as Symbol\u003c\/h2\u003e\n\u003cp\u003eThe looped ribbon traces back further than 1991. Yellow ribbons tied to trees as signs of hope for absent soldiers were popularised by a 1973 song. The format crossed over to the AIDS movement at the start of the nineties and from there to dozens of other causes. Each colour carries its own meaning: red for HIV\/AIDS, pink for breast cancer, purple for pancreatic cancer and Alzheimer's, green for mental health, orange for multiple sclerosis and self-harm awareness, gold for childhood cancer. The format works because it's simple enough to be recognised at a glance and ambiguous enough to belong to whoever wears it.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Audience\u003c\/h2\u003e\n\u003cp\u003ePeople who carry a cause without wanting to talk about it constantly:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eresearchers, clinicians, and patient advocates working in cancer, rare disease, or public health\u003c\/li\u003e\n\u003cli\u003esurvivors and people who have lost someone\u003c\/li\u003e\n\u003cli\u003efundraisers and campaigners who want a year-round version of a one-day pin\u003c\/li\u003e\n\u003cli\u003eanyone who'd rather wear their cause than explain it\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhat cause is it for? Whichever one you wear it for.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Symbolic Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/awareness-ribbon-18k-gold-plated\"\u003eAwareness ribbon necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/rod-of-asclepius\"\u003eRod of Asclepius necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heartbeat\"\u003eHeartbeat necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/caduceus\"\u003eCaduceus necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eCan I wear this for any specific cause?\u003c\/h3\u003e\n\u003cp\u003eYes. The looped ribbon has been adopted by so many causes that it's become a generic symbol of solidarity. The meaning you give it is the meaning it carries. People often choose it as a private marker of something they don't want to label out loud.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy did the looped ribbon become the universal awareness symbol?\u003c\/h3\u003e\n\u003cp\u003eBecause it's the lowest-friction symbol you can wear. A looped ribbon takes a second to recognise, doesn't require any text, and works across languages and contexts. The 1991 red ribbon at the Tony Awards proved it scaled, and within a few years it had been adopted by enough other causes that the format itself, rather than any one colour, became the symbol.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e21 mm pendant in 925 sterling silver, nickel-free. 45 cm chain with a 5 cm extender. Ships free worldwide via DHL Express in 1-5 business days, with all import duties prepaid. Comes in a ready-to-gift jewelry box with the 30-day \"Love It or Return It\" policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eSame design as the gold vermeil version?\u003c\/h3\u003e\n\u003cp\u003eYes. Same 21 mm size and same model. The gold vermeil version sits at a more formal register, and the silver tends to read as the everyday option.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13732071276607,"sku":"NK0034-S","price":140.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/silver_awareness_ribbon_necklace.png?v=1727875364"},{"product_id":"spine-18k-gold-plated","title":"spine necklace | gold vermeil","description":"\u003ch2\u003eSpine necklace | 18k gold vermeil\u003c\/h2\u003e\n\u003cp\u003eThe spine is the part of the body you only notice when something has gone wrong with it. Thirty-three vertebrae stacked into an S-curve, holding up the skull and the central nervous system at the same time, doing all the work of a structural column and a neural cable simultaneously. The pendant captures the full vertebral column at scale, in 18k gold vermeil, every vertebra rendered from the atlas to the sacrum.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Anatomy of the Spine\u003c\/h2\u003e\n\u003cp\u003eThe vertebral column has 33 vertebrae: 7 cervical, 12 thoracic, 5 lumbar, 5 sacral fused into the sacrum, and 3 to 4 coccygeal fused into the coccyx. Four curves run in the sagittal plane: cervical lordosis, thoracic kyphosis, lumbar lordosis, sacral kyphosis. Together they form a spring system that absorbs axial load during walking and running. The thoracic and sacral curves are present at birth; the cervical and lumbar curves develop in infancy as the child first lifts the head and then begins to walk. The vertebral foramina align to form the spinal canal, and the spinal cord runs through that canal until roughly the L1 to L2 level, where it ends and the cauda equina continues to the sacrum as a bundle of nerve roots. Damage at any level produces predictable neurological deficits below that level, which is why spinal level determination is one of the most consequential clinical skills in neurology and emergency medicine.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003espine surgeons, neurosurgeons, and orthopaedic surgeons\u003c\/li\u003e\n\u003cli\u003ephysiotherapists, chiropractors, and manual therapists\u003c\/li\u003e\n\u003cli\u003eanatomists, kinesiologists, and pain medicine specialists\u003c\/li\u003e\n\u003cli\u003emedical students through their first full back anatomy\u003c\/li\u003e\n\u003cli\u003epeople who have come through major spinal surgery or a long rehabilitation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often picked as a milestone gift after a fellowship, a difficult surgery, or a hard-won recovery. Gold reads as the version you mark something with, where the silver tends to be the everyday clinical piece.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Anatomy Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spine\"\u003eSpine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/atlas-18k-gold-plated\"\u003eAtlas vertebra necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cervical-vertebra-necklace-gold-vermeil\"\u003eCervical vertebra necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/lumbar-vertebra-18k-gold-plated\"\u003eLumbar vertebra necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/thoracic-vertebra-18k-gold-plated\"\u003eThoracic vertebra necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy the full spine instead of a single vertebra?\u003c\/h3\u003e\n\u003cp\u003eSpecific vertebrae make sense when the work or the story is about one level, an atlas for the craniocervical junction, a lumbar vertebra for low-back specialists. The full column makes sense when the story is about the whole structure: the way the curves balance each other, the way the spinal cord runs through it, the way scoliosis or a long fusion shows up across multiple levels at once. Both versions are valid pieces. This is the comprehensive one.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is the S-curve important?\u003c\/h3\u003e\n\u003cp\u003eThe S-curve is what lets the spine carry vertical loads without breaking. A perfectly straight column would transmit every footstep up to the skull as a shock; the alternating cervical, thoracic, lumbar, and sacral curves act as a leaf-spring system that absorbs and redistributes the impact. Loss of the lumbar curve (flat-back syndrome) or excessive curvature (hyperkyphosis, hyperlordosis) is biomechanically expensive: it forces compensation elsewhere in the chain. The pendant is rendered from posterior view, where the column reads mostly straight; the sagittal curves are clearer in lateral view than at this angle, but the vertebral spacing and proportions are anatomically accurate.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 60 mm tall, sized to make the full vertebral column readable as a single piece. It comes in 18k gold vermeil, a 2.5 micron gold layer over a sterling silver core, nickel-free and hypoallergenic, on a 45 cm gold vermeil chain (1.8 mm width, lobster clasp) with a 5 cm extender, so the pendant sits at the centre of the chest where the spine itself runs. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the difference between the silver and gold spine?\u003c\/h3\u003e\n\u003cp\u003eThe anatomy is identical: same 33 vertebrae, same S-curve, same 60 mm scale. Material is the only difference. The silver version tends to be the daily clinical piece, worn into theatre, clinic, and rounds. The gold reads as the more deliberate piece, often picked as a milestone marker after a fellowship completion, a difficult surgery, or a long recovery. Both ship on a 45 cm chain in matching material.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13806865350719,"sku":"NK0339-GV","price":255.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/spine-necklace-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51387334033756.png?v=1699094228"},{"product_id":"lumbar-vertebra-18k-gold-plated","title":"lumbar vertebra necklace | gold vermeil","description":"\u003ch2\u003eLumbar vertebra necklace | 18k gold vermeil\u003c\/h2\u003e\n\u003cp\u003eThe lumbar vertebrae are the largest bones in the spine. They carry the load of everything above them, and they take the brunt of every lift, twist, and decade of standing. Most of the chronic back pain in the world traces back to wear in this region.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Anatomy of the Lumbar Spine\u003c\/h2\u003e\n\u003cp\u003eThe lumbar vertebrae are large, weight-bearing bones with thick bodies, short pedicles, and laminae arranged for stability under compression. Between each pair sits an intervertebral disc with a hydrated proteoglycan core (the nucleus pulposus) wrapped in concentric rings of collagen (the annulus fibrosus). Under load, the nucleus distributes pressure hydrostatically. Under flexion, it migrates posteriorly toward the spinal canal. Disc degeneration, the loss of water content and proteoglycan, reduces disc height, alters facet loading, and is one of the leading causes of chronic back pain worldwide. The five lumbar segments together carry roughly 60% of upper-body weight in standing, and considerably more during lifting.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cp\u003eThe audience is narrower than for most anatomical pieces:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003espine surgeons, orthopaedic surgeons, and neurosurgeons working at L1 to L5\u003c\/li\u003e\n\u003cli\u003ephysiotherapists, chiropractors, and osteopaths whose clinical day centres on the lumbar spine\u003c\/li\u003e\n\u003cli\u003epain medicine physicians working with chronic low back pain\u003c\/li\u003e\n\u003cli\u003emusculoskeletal radiologists who read lumbar imaging daily\u003c\/li\u003e\n\u003cli\u003epatients and clinicians for whom a lumbar diagnosis became a personal milestone\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOften bought as a gift after fellowship completion in spine or orthopaedic surgery, or as a self-purchase by clinicians whose careers have been built on this part of the column.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Human Anatomy Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/lumbar-vertebra\"\u003eLumbar vertebra necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/thoracic-vertebra-necklace-gold-vermeil\"\u003eThoracic vertebra necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spine-18k-gold-plated\"\u003eSpine necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/pelvis-18k-gold-plated\"\u003ePelvis necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWill a spine surgeon actually wear this?\u003c\/h3\u003e\n\u003cp\u003eMost do. The lumbar vertebra is unmistakable to anyone who works with the column, and a piece that names this segment specifically rather than the whole spine reads as well-chosen rather than generic. The gold vermeil makes it appropriate for theatre rounds, faculty dinners, or conferences without losing the technical specificity of the bone itself.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is the lumbar spine where most chronic back pain comes from?\u003c\/h3\u003e\n\u003cp\u003eTwo reasons stack. The lumbar vertebrae carry the heaviest mechanical load in the spine, and the discs between them are the largest and most metabolically demanding. Discs are essentially avascular by adulthood, so they rely on diffusion through the cartilage end-plates for nutrient exchange. That diffusion slows with age, the discs lose water, and the load distribution shifts onto the facet joints. Most degenerative back pain follows from there.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e27 mm pendant in 18k gold vermeil over a sterling silver core, nickel-free. 45 cm gold vermeil chain with a 5 cm extender. Ships free worldwide via DHL Express in 1-5 business days, with all import duties prepaid. Comes in a ready-to-gift jewelry box with the 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eSame design as the silver lumbar vertebra?\u003c\/h3\u003e\n\u003cp\u003eYes. Same model, same 27 mm size. Material is the only difference. The silver tends to be the working clinician's piece. The gold reads more formal, more often a milestone gift or a self-purchase after fellowship.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13808808329279,"sku":"NK0204-GV","price":215.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/lumbar-vertebra-necklace-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51387666858332.png?v=1699095848"},{"product_id":"astrocyte-18k-gold-plated","title":"astrocyte necklace | gold vermeil","description":"\u003ch2\u003eAstrocyte necklace | 18K gold vermeil\u003c\/h2\u003e\n\u003cp\u003eIn 2002 you published your first paper on glial cells and the astrocyte felt invisible. Decades later the field caught up. The astrocyte is not just scaffolding. It is the most abundant cell type in the central nervous system and an active player. The 29 mm gold necklace marks that shift in understanding.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Astrocyte\u003c\/h2\u003e\n\u003cp\u003eAstrocytes are star-shaped glial cells and the most abundant cell type in the central nervous system by some counts. Historically positioned as passive support, recent research has revealed active roles in brain function. Astrocytes form the blood-brain barrier, buffer extracellular potassium, take up and recycle glutamate from synapses, provide metabolic support to neurons, and modulate the tripartite synapse. They are marked by glial fibrillary acidic protein (GFAP). Activated astrocytes in response to stroke, neurodegeneration, and neuroinflammation may both help and harm neural tissue depending on context. Contemporary neuroscience increasingly recognizes astrocyte heterogeneity and the cell's role as a non-linear signaling partner in neural circuits, not merely a background support structure.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eneuroscientists and glia researchers who study astrocyte biology, signaling, or metabolism\u003c\/li\u003e\n\u003cli\u003eclinical neurologists treating stroke, neurodegeneration, or neuroinflammation\u003c\/li\u003e\n\u003cli\u003eresearchers who work on blood-brain barrier function or glial-neural interactions\u003c\/li\u003e\n\u003cli\u003epeople whose understanding of the astrocyte shifted over time and want to mark that evolution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often given at the moment someone's research recognizes what the astrocyte does.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Neuroscience Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell-18k-gold-plated\"\u003ePurkinje cell necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-18k-gold-plated\"\u003eNeuron necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spindle-neuron-18k-gold-plated\"\u003eSpindle neuron necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/microglia-18k-gold-plated\"\u003eMicroglia necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWho wears the astrocyte necklace?\u003c\/h3\u003e\n\u003cp\u003eGlia researchers, neurobiologists, clinical neurologists, and anyone whose career touches the blood-brain barrier or glial-neural signaling. Also people who remember when astrocytes were treated as invisible background and recognize how much the field has changed. The astrocyte necklace is often a personal piece, not just a professional one.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy did the astrocyte stay invisible for so long?\u003c\/h3\u003e\n\u003cp\u003eAstrocytes don't fire action potentials the way neurons do, so early electrophysiology missed them. They don't have a single clearly mapped function the way neurons have synaptic transmission. For decades they were thought of as glue, not signal-carrying cells. Modern two-photon imaging, calcium imaging, and patch-clamp recording of astrocytes revealed that they were active all along. We were just using the wrong tools to see them. The shift from \"scaffolding\" to \"active signaling partner\" is one of the major recalibrations in neuroscience of the past 20 years.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size and material?\u003c\/h3\u003e\n\u003cp\u003e18K gold vermeil, 29 mm pendant on a 45 cm gold vermeil chain (ø 1.8 mm) with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a silver version of the astrocyte?\u003c\/h3\u003e\n\u003cp\u003eNot currently. The astrocyte is positioned as a gold milestone piece, typically worn by researchers whose careers have shifted in tandem with the field's understanding of glial cells. If silver is your material preference, let us know and we can explore that for you.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13809181950015,"sku":"NK0025-GV","price":175.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/040_astrocyte_vermeil.png?v=1709033187"},{"product_id":"stethoscope-18k-gold-plated","title":"stethoscope necklace | gold vermeil","description":"\u003ch2\u003eStethoscope necklace | gold vermeil\u003c\/h2\u003e\n\u003cp\u003eThe stethoscope is the most photographed instrument in medicine. White-coat ceremonies, graduation portraits, hospital portraits, every cliché of the working clinician. Two centuries on, it has survived imaging, ultrasound, and digital monitoring. Nothing has replaced its role as the first physical instrument applied to most patients.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Stethoscope\u003c\/h2\u003e\n\u003cp\u003eRené Laennec invented the stethoscope in Paris in 1816 after rolling a sheet of paper into a tube to listen to a young female patient's heart, uncomfortable about applying his ear directly to her chest. He named the device from the Greek 'stethos' (chest) and 'skopein' (to examine), and published a comprehensive treatise on its diagnostic use in 1819. The modern binaural stethoscope with two earpieces and a flexible tube was developed by George Philip Cammann in New York in 1851. Today's acoustic stethoscopes use a diaphragm for high-frequency sounds and a bell for low-frequency sounds, with electronic models offering digital amplification for telemedicine.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cp\u003eFor people who own multiple stethoscopes and have an opinion about which one.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003edoctors, medical students, and physicians at any career stage\u003c\/li\u003e\n\u003cli\u003enurses, nurse practitioners, and physician assistants\u003c\/li\u003e\n\u003cli\u003emedical educators and clinical preceptors\u003c\/li\u003e\n\u003cli\u003epartners, parents, and friends marking a graduation or board certification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often given as a medical-school graduation gift, or to mark a board certification or a hospital-leadership transition.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Medical Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/stethoscope\"\u003eStethoscope necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/stethoscope-studs\"\u003eStethoscope studs | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/scalpel-18k-gold-plated\"\u003eScalpel necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dental-mirror-18k-gold-plated\"\u003eDental mirror necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat do you give a doctor who already has everything?\u003c\/h3\u003e\n\u003cp\u003eSomething specific to the calling, not generic to the profession. The stethoscope necklace is more particular than a pen or a watch. It names the work directly. We see it most often as a medical-school graduation gift, a board-certification marker, or a partner's gift after a difficult residency.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is the stethoscope still a universal symbol of medicine?\u003c\/h3\u003e\n\u003cp\u003eBecause the instrument has not been replaced. Imaging, lab tests, and electronic monitoring exist in parallel, but the stethoscope remains the first physical instrument applied to most patients during most clinical encounters. The symbol carries the same weight as the work it does.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat about size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e33 mm pendant in 18K gold vermeil (sterling silver core, 2.5 micron gold plating), nickel-free. 45 cm gold vermeil chain with a 5 cm extender. Free DHL Express anywhere in the world, 1-5 business days, all duties and taxes covered. 30-day “Love It or Return It” policy if it does not fit how you wear gold.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eHow does the gold compare to the silver stethoscope necklace?\u003c\/h3\u003e\n\u003cp\u003eSame design, same 33 mm size. Sterling silver core with 2.5 micron 18K gold plating versus solid 925 sterling silver. The gold reads warmer and tends to be chosen for graduation and milestone gifts. The silver reads cleaner and tends to be daily wear.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13809201840191,"sku":"NK0341-GV","price":160.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/stethoscope-necklace-gold-vermeil.png?v=1726839898"},{"product_id":"antibody-18k-gold-plated","title":"antibody necklace | gold vermeil","description":"\u003ch2\u003eAntibody necklace | gold vermeil\u003c\/h2\u003e\n\u003cp\u003eThe Y-shape of an immunoglobulin, at 15 mm in 18K gold vermeil. The molecule that recognises every pathogen the immune system has ever met, every monoclonal therapy on the market, and every Western blot ever stained. The pendant is small because the molecule is small. The reach of what it represents is anything but.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Antibody\u003c\/h2\u003e\n\u003cp\u003eAntibodies are Y-shaped proteins built from two heavy chains and two light chains, joined by disulfide bonds. The two arms of the Y are the variable regions, generated by V(D)J recombination during B-cell development to produce a repertoire of roughly 10^11 different binding specificities. The stem of the Y is the constant region, which determines the antibody's class (IgG, IgM, IgA, IgE, IgD) and its effector function. Therapeutic antibodies, from rituximab to pembrolizumab, exploit this same architecture: a tailored variable region binds the disease-relevant target, and the constant region recruits immune effectors. Monoclonal antibodies are now among the highest-revenue drug classes in pharmaceutical history.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cp\u003eImmunologists, oncologists, and people who work with antibodies as both research tools and therapeutics.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eimmunologists and B-cell biologists\u003c\/li\u003e\n\u003cli\u003emedical oncologists prescribing monoclonal therapies\u003c\/li\u003e\n\u003cli\u003ebiotech and pharmaceutical scientists in antibody discovery\u003c\/li\u003e\n\u003cli\u003eclinical lab staff who run flow cytometry or immunoassays daily\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe gold vermeil version tends to be chosen as a milestone object: a defended PhD on antibody engineering, a clinical board pass in oncology, or a long-career marker.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Cellular Biology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/antibody\"\u003eAntibody necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/antibody-1\"\u003eAntibody bracelet | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/antibody-studs\"\u003eAntibody studs | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/igm\"\u003eIgM necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/insulin-18k-gold-plated\"\u003eInsulin necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat does the pendant show?\u003c\/h3\u003e\n\u003cp\u003eAn immunoglobulin in its classic Y-shape: two heavy chains plus two light chains, with the variable binding regions at the tips of the Y and the constant region at the stem. The geometry is standard textbook orientation, simplified for jewelry scale.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy an antibody rather than a specific Ig class?\u003c\/h3\u003e\n\u003cp\u003eBecause the Y-shape is shared across IgG, IgM, IgA, IgE, and IgD. The pendant reads as the canonical antibody, the architecture rather than a specific isotype. The catalog includes a separate IgM necklace and an antibody bracelet for people who want a more specific reference.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat are the specs and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e18K gold vermeil with sterling silver core and 2.5 micron gold plating, 15 mm pendant, 45 cm chain with a 5 cm extender. Nickel-free and hypoallergenic. Ships free worldwide via DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this also available in silver?\u003c\/h3\u003e\n\u003cp\u003eYes. The same 15 mm antibody pendant is available in 925 sterling silver at the same size and chain length.\u003c\/p\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13815773495359,"sku":"NK0016-GV","price":145.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/antibody-necklace-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51379824066908.png?v=1699023314"},{"product_id":"4-cell-embryo-18k-gold-plated","title":"4 cell embryo | gold vermeil","description":"\u003ch2\u003e4 cell embryo necklace | 18k gold vermeil\u003c\/h2\u003e\n\u003cp\u003eFor many parents, the first photograph of their child is a 4-cell embryo on day 3 of an IVF cycle. Four cells, equal in size, dividing under the microscope at the morphology check before transfer. The pendant captures that exact stage in 18k gold vermeil, the moment when an entire developmental potential is visible in a single image.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Biology of the 4-Cell Stage\u003c\/h2\u003e\n\u003cp\u003eThe 4-cell stage occurs at roughly 40 to 44 hours after fertilisation, after two rounds of cleavage. The cells, called blastomeres, are still totipotent: in principle, each one could give rise to a complete individual on its own. This is the basis for monozygotic twinning at the 2 to 4-cell stage. The cleavage divisions are unusual because they increase cell number without increasing total cell mass: each blastomere is half the size of its predecessor. By day 3 the embryo has typically reached the 8-cell stage, and by day 5 it has compacted into a blastocyst, the form transferred in most modern IVF protocols. In clinical IVF, embryo morphology at the 4-cell stage is one of the early selection points before transfer, with symmetry, fragmentation, and cell size predicting implantation success. Time-lapse imaging systems now monitor the kinetics of the first divisions continuously, and the timing of those early cleavages is independently predictive of which embryos will implant.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eembryologists working with IVF and early embryo selection\u003c\/li\u003e\n\u003cli\u003ereproductive endocrinologists and fertility specialists\u003c\/li\u003e\n\u003cli\u003edevelopmental biologists studying cell fate, totipotency, and cleavage kinetics\u003c\/li\u003e\n\u003cli\u003ewomen carrying their own IVF story, including a successful transfer\u003c\/li\u003e\n\u003cli\u003epartners and families marking the moment that began everything\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOften picked to mark a specific day: a transfer, a successful round, a positive beta. Increasingly chosen in gold over silver when the moment being marked is the one that worked.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Embryology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/4-cell-embryo\"\u003e4 cell embryo necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/blastocyst-necklace-gold-vermeil\"\u003eBlastocyst necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/embryo\"\u003eEmbryo necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/uterus-18k-gold-plated\"\u003eUterus necklace H | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/egg-and-sperm\"\u003eEgg and sperm necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this an appropriate gift after a successful IVF cycle?\u003c\/h3\u003e\n\u003cp\u003eOften yes, especially in gold. The 4-cell embryo is the stage most often photographed in IVF clinics at the first morphology check, and many parents have a small printout of that exact image somewhere, sometimes the only \"first photograph\" they have. Gold tends to be the version chosen when the cycle worked, when there is a baby, or when an anniversary of a transfer comes around. A short note that names the date or the cycle usually does more than the pendant alone.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat does totipotent mean?\u003c\/h3\u003e\n\u003cp\u003eIt means each of the four cells can give rise to a complete individual on its own. The blastomeres at the 4-cell stage have not yet committed to becoming any particular tissue, including the placenta. After compaction at the 8 to 16-cell stage, the cells begin to differentiate. The inner ones become the embryo, the outer ones become the placenta. The 4-cell stage is the last point where each cell could theoretically still become anything.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 20 mm in 18k gold vermeil, a 2.5 micron gold layer over a sterling silver core, nickel-free and hypoallergenic, on a 45 cm gold vermeil chain (1.8 mm width, lobster clasp) with a 5 cm extender, so it sits at the collarbone or a little below. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the difference between the silver and gold versions?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is identical: same four blastomeres, same 20 mm scale, same morphology. Material is the only difference. The silver tends to be the choice during a journey that is still in progress, quietly meaningful, daily wear. The gold tends to be the choice when the journey resolved: a completed transfer, a baby, an anniversary worth marking. Both ship on a 45 cm chain in matching material.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13815814029375,"sku":"NK0002-GV","price":220.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/4-cell-embryo-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51382009168220.png?v=1699039512"},{"product_id":"mendels-peas","title":"Mendel's peas necklace | silver","description":"\u003ch2\u003eMendel's peas necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you can recite a 9:3:3:1 ratio from memory, you have spent enough time inside Mendelian genetics to recognise this. The story behind it (the monastery garden in Brno, the friar who failed his teaching exams twice, the work that was correct and ignored for 35 years) is more interesting than any textbook version.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Mendel's Peas\u003c\/h2\u003e\n\u003cp\u003eGregor Mendel conducted roughly 28,000 pea plant crosses between 1856 and 1863 in the monastery garden of St. Thomas's Abbey in Brno. He published his findings in \"Versuche über Pflanzen-Hybriden\" (Experiments in Plant Hybridisation) in 1866. Mendel deliberately chose Pisum sativum: the plants self-fertilise by default, generation time is short, offspring number is large, and the seven traits he studied assort independently across chromosomes. Remarkably, all seven traits he selected happen to assort independently, a coincidence that continued to fuel debate about whether Mendel manipulated data. Ronald Fisher raised this possibility in 1936. The probability of this happening by chance remains disputed. Mendel's laws were independently rediscovered by de Vries, Correns, and Tschermak around 1900.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cp\u003eFor genetics educators, biology teachers, students who study inheritance, and science historians who appreciate both the elegance and the complexity of Mendel's legacy.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003egenetics professors and biology teachers\u003c\/li\u003e\n\u003cli\u003egenetics and cell biology students\u003c\/li\u003e\n\u003cli\u003escience historians and science communicators\u003c\/li\u003e\n\u003cli\u003eanyone who teaches or studies the foundations of heredity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Genetics Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna\"\u003eDNA necklace H | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/chromosome-flat\"\u003eFlat chromosome necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/metaphase\"\u003eMitosis necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/darwins-phylogenetic-tree\"\u003eDarwin's phylogenetic tree necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat are the F2 ratios Mendel discovered?\u003c\/h3\u003e\n\u003cp\u003eWhen Mendel crossed hybrid peas, he got a 3:1 ratio in the second generation: three dominant traits to one recessive. That ratio, and the laws behind it, founded modern genetics. This pendant shows the pea pods he studied.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy was Mendel's work ignored for so long?\u003c\/h3\u003e\n\u003cp\u003eHis paper was published in an obscure journal and his statistical thinking was a century ahead of his peers. It was not until 1900, when three researchers independently rediscovered the same principles, that his work was recognised as genius.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003eSterling silver pendant at 34 mm, nickel-free and hypoallergenic. 45 cm sterling silver chain with a 5 cm extender and lobster clasp. Ships free worldwide via DHL Express in 1-5 business days. Comes in a ready-to-gift jewelry box with the 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this specific enough for someone who is not a geneticist?\u003c\/h3\u003e\n\u003cp\u003eYes. Mendel's monastery garden in Brno is where modern genetics began. It is a piece of intellectual heritage that anyone who respects the history of science can wear.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":14213282431039,"sku":"NK0219-S","price":160.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/mendel-s-peas-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51400691155292.png?v=1699252989"},{"product_id":"gfp","title":"GFP necklace | silver","description":"\u003ch2\u003eGFP necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eA GFP necklace for molecular and cell biologists, structural biologists, and anyone who has stared at green fluorescence under a microscope and known exactly what they were looking at. The 11-stranded beta-barrel from Aequorea victoria, in 925 sterling silver.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science of GFP\u003c\/h2\u003e\n\u003cp\u003eGreen fluorescent protein is a 238-amino acid protein originally isolated from the jellyfish Aequorea victoria by Osamu Shimomura in 1962. Its defining structure is an 11-stranded beta-barrel with a central alpha helix carrying the chromophore, formed autocatalytically from the tripeptide Ser65-Tyr66-Gly67 without any cofactors. Once folded, the barrel shields the chromophore from the solvent and lets it fluoresce green when excited by blue light. Martin Chalfie showed in 1994 that GFP could be expressed in other organisms and used as a genetically encoded reporter, and Roger Tsien engineered the colour variants and improved folding kinetics that made the toolkit truly general. The 2008 Nobel Prize in Chemistry was awarded jointly to Shimomura, Chalfie, and Tsien for the discovery and development of GFP. Few molecules have done more to make invisible biology visible.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cp\u003eFor the people who have run a Western with anti-GFP and trusted the band.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003emolecular and cell biologists who use GFP as a fusion tag, reporter, or live-cell marker\u003c\/li\u003e\n\u003cli\u003estructural biologists who appreciate the elegance of the barrel\u003c\/li\u003e\n\u003cli\u003emicroscopists, imaging specialists, and biophysicists\u003c\/li\u003e\n\u003cli\u003ePhD students and postdocs whose entire project depends on a fluorescent fusion working\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor the colleague whose first successful GFP image they still have on a slide somewhere.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eExplore Related Cellular Biology Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/gfp-necklace-gold-vermeil\"\u003eGFP necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/beta-sheet\"\u003eBeta sheet necklace | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/mammalian-cell\"\u003eMammalian cell necklace | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/nuclear-pore\"\u003eNuclear pore necklace | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWill a working cell biologist actually appreciate this?\u003c\/h3\u003e\n\u003cp\u003eYes. GFP is one of those proteins where the structure has lived in the field's collective memory for thirty years: a green can with the chromophore tucked inside. The pendant renders the 11-stranded beta-barrel cleanly, which is the version on every textbook slide. People who have spent a career building fusion constructs tend to recognise it across a room.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is the structure a barrel, and why does that matter?\u003c\/h3\u003e\n\u003cp\u003eThe barrel architecture is what protects the chromophore from the surrounding water and lets it fluoresce. Pull the protein apart and the green disappears within seconds. The chromophore itself forms autocatalytically, just from the right three amino acids and oxygen, which is why GFP works as a single-gene reporter without any added cofactors. The barrel is also why GFP folds so robustly across organisms, from yeast to plants to mammalian cells. It is a self-contained piece of optical hardware.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what does it ship with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 28 mm tall, sized so the beta-barrel architecture reads clearly at a glance. It comes on a 45 cm sterling silver chain (1.8 mm width, lobster clasp) with a 5 cm extender. Free worldwide DHL Express shipping in 1-5 business days, all import duties covered, in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy GFP and not one of the other fluorescent proteins?\u003c\/h3\u003e\n\u003cp\u003eThe colour palette has expanded enormously since the original wild-type protein, and most labs now use mEGFP, mCherry, mScarlet, or one of the far-red variants for serious imaging. The original GFP is still the structure that started it all, the one that the 2008 Nobel was awarded for, and the version most people in the field would draw if asked. The pendant is the foundational shape, not a specific colour variant.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":14233066438719,"sku":"NK0156-S","price":200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/gfp-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51400685453660.png?v=1699252812"},{"product_id":"neuron-earrings","title":"neuron earrings | silver","description":"\u003ch2\u003eNeuron earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe neuron is the unit of neural computation, and the earring scale puts the cell at conversation distance rather than chest height. Two neurons on the wearer, mirroring across the head as the cells mirror across cortical hemispheres. Worn here as a pair of 31 mm sterling silver leverback earrings.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Neuron\u003c\/h2\u003e\n\u003cp\u003eThe neuron doctrine, the principle that the brain is composed of discrete cellular units rather than a continuous reticulum, was settled by Santiago Ramón y Cajal's silver-staining studies in the 1880s and 1890s. Cajal's silver impregnation revealed individual neurons in cortex, cerebellum, retina, and spinal cord, settling a long debate with Camillo Golgi (who maintained the reticular theory). The two shared the 1906 Nobel Prize in Physiology or Medicine. Each neuron computes through dendritic input integration, cell-body summation, and axonal action potential propagation, with myelination by oligodendrocytes (CNS) or Schwann cells (PNS) speeding conduction. Synapse counts in the human cortex run between 10¹⁴ and 10¹⁵. The diversity is enormous: pyramidal cells, interneurons, motor neurons, sensory neurons, Purkinje cells, granule cells, each tuned to a particular computational role.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eneuroscientists who want a daily-wear neuron format that does not require unbuttoning a collar\u003c\/li\u003e\n\u003cli\u003eclinical neurologists and neuroscience trainees who already own one of the neuron pendants\u003c\/li\u003e\n\u003cli\u003emedical and graduate students in neuroscience programmes\u003c\/li\u003e\n\u003cli\u003escience educators teaching brain biology at any level\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who already owns the neuron pendant in silver or gold and wants a second daily-wear format, or who finds the earring scale easier than a chest pendant for working clinical and lab use.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Neuroscience Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron\"\u003eNeuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-18k-gold-plated\"\u003eNeuron necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/spindle-neuron\"\u003eSpindle neuron necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/purkinje-cell\"\u003ePurkinje cell necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/sagittal-brain-18k-gold-plated\"\u003eSagittal brain necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy pick the earrings over the pendant?\u003c\/h3\u003e\n\u003cp\u003eThe earring scale sits closer to conversation distance than a chest pendant. Visible to the wearer in the mirror, visible to anyone looking directly. Buyers who already own one of the neuron pendants (silver or gold) often pick up the earring hoops as a second daily-wear format that does not interact with a stethoscope, a sterile field, or a collar. Buyers who want a quieter signal than a chest pendant tend to start with the earrings.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre these for working neuroscientists or for science enthusiasts?\u003c\/h3\u003e\n\u003cp\u003eBoth, in roughly equal measure. Working neuroscientists buy them as a daily-wear reference to the cell type their work depends on. Clinical neurologists wear them in clinic where a chest pendant would catch a stethoscope. Neuroscience educators wear them in lectures and seminars, where the earring scale reads at the distance students see them. Recipients outside neuroscience tend to be people whose family or friends study brain biology and who pick up the molecule as a quieter wearable than the pendant.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are the earrings and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 31 mm neuron earrings on sterling silver leverback hooks. Nickel-free and hypoallergenic, no chain. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre there other formats of the neuron design?\u003c\/h3\u003e\n\u003cp\u003eYes, two pendants. The neuron is available as a \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron\"\u003esilver pendant\u003c\/a\u003e (the daily-wear silver counterpart, with the Cajal silver-staining link) and as a \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/neuron-18k-gold-plated\"\u003egold vermeil pendant\u003c\/a\u003e (the milestone-gift version). Many neuroscientists who own the earrings build the set with one of the pendants over time, picking the silver for everyday continuity and the gold for graduations or career markers.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":14532373774399,"sku":"ER0041-S","price":190.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/neuron-earrings-silver-earrings-science-jewelry-sciencejewelry1824-51402781065564.png?v=1699275498"},{"product_id":"hummingbird-skull","title":"hummingbird skull necklace | silver","description":"\u003ch2\u003eHummingbird skull necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eA heart that beats up to 1,260 times a minute. A body that drops into near-ambient torpor overnight to survive on the metabolic edge. A tongue that licks nectar at 18 laps a second. The hummingbird is a study in physiological extremes, and it all begins at the skull. Worn here as a 40 mm sterling silver pendant.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Anatomy of the Hummingbird Skull\u003c\/h2\u003e\n\u003cp\u003eThe hummingbird skull is built for precision nectar extraction at speed while hovering. Unlike most birds, hummingbirds can flex the lower beak downward mid-flight via rhynchokinesis, opening the gape to fit a wider flower. Alejandro Rico-Guevara at UC Berkeley showed in 2015 that the tongue does not work by capillary action: it deforms elastically to trap nectar and springs back to load the next lap. The brain is approximately 4.2% of body weight, one of the highest ratios of any bird. The hippocampus is proportionally larger than in most birds, linked to the spatial memory the animal needs to track hundreds of individual flowers across a daily route.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Tends to Wear This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eornithologists and avian biologists\u003c\/li\u003e\n\u003cli\u003ebiomechanics researchers and comparative physiologists\u003c\/li\u003e\n\u003cli\u003efield biologists working on pollinator-flower coevolution\u003c\/li\u003e\n\u003cli\u003eanyone who has ever watched a hummingbird hover and wanted to know how\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor the researcher whose work touches the boundary between biomechanics, energetics, and sensory neuroscience.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Animal Skull and Skeleton Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/raven-skull\"\u003eRaven skull necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/fruit-bat-skull\"\u003eFruit bat skull necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/wish-bone\"\u003eWishbone necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/seahorse-skeleton-18k-gold-plated\"\u003eSeahorse skeleton necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/scarab-beetle\"\u003eScarab beetle necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this really a working ornithologist's gift, or a pretty bird piece?\u003c\/h3\u003e\n\u003cp\u003eWorking ornithologists who pick this up almost always frame it around the biomechanics. The hummingbird skull is one of the most studied avian morphologies because the trade-offs between size, mass, and metabolic rate are so extreme. Field biologists working on pollinator ecology buy it as a discipline marker. The pretty-bird audience is real but secondary, and the science the skull carries gives the pendant a different reading from a generic feather charm.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eHow does a hummingbird drink nectar so fast?\u003c\/h3\u003e\n\u003cp\u003eNot by capillary action, which was the textbook answer until 2015. Rico-Guevara's high-speed video and biomechanical modelling at UC Berkeley showed that the forked tongue deforms elastically as it enters the nectar pool, trapping liquid in flaps that fold open and shut. The tongue then springs back into the bill and the nectar is squeezed out by the beak's geometry. The full cycle repeats up to 18 times per second, which is what allows the bird to feed efficiently while hovering at metabolic rates no mammal could sustain.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 40 mm pendant on a 45 cm sterling silver chain with a 5 cm extender. Larger scale than most pieces in the catalogue. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eNot at present. The hummingbird skull is sterling silver only. If a gold animal-skeleton piece is the goal, the seahorse skeleton, raven skull, and T-Rex skull all exist in 18K gold vermeil with related stories from comparative biology.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":14911623364671,"sku":"NK0177-S","price":146.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/hummingbird-skull-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51400646000988.png?v=1699251918"},{"product_id":"embryo","title":"embryo necklace | silver","description":"\u003ch2\u003eEmbryo necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eWeeks 4 through 8 of human development are the most consequential 28 days of a body's existence. The neural tube closes, the heart starts beating, all major organ systems begin, the limb buds form, and the body plan is laid down. Almost everything about the structure of an adult human is decided in this window.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Biology of the Embryonic Period\u003c\/h2\u003e\n\u003cp\u003eThe embryonic period runs from week 3 (gastrulation) to week 8 of gestation. By week 4 the neural tube has closed, the heart tube has folded and started pumping, and the somites are segmenting along the length of the body to lay down the future vertebral column and skeletal muscle. By week 5 the limb buds have appeared. By week 6 the eyes, ears, and basic facial structure are recognisable. By week 8 organogenesis is largely complete: the embryo measures roughly 25 mm and from this point forward is called a foetus, with the remaining 32 weeks dedicated mostly to growth and maturation rather than new structure formation. The embryonic period is also the window of maximum vulnerability to teratogens (alcohol, retinoids, infections, radiation), which is why so much of obstetric medicine and birth-defect prevention concentrates on these few weeks.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cp\u003eThe audience splits cleanly between clinical specialists and personal:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eobstetricians, embryologists, and developmental biologists\u003c\/li\u003e\n\u003cli\u003efetal medicine and maternal-fetal medicine specialists\u003c\/li\u003e\n\u003cli\u003eIVF clinicians and clinical embryologists\u003c\/li\u003e\n\u003cli\u003egeneticists working on developmental biology and birth defects\u003c\/li\u003e\n\u003cli\u003eparents who reached this stage through fertility treatment or pregnancy and want to mark it\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOften a milestone gift in obstetrics, embryology, or reproductive medicine. Most often picked by partners marking a successful pregnancy after IVF, or by clinicians at the close of a fellowship in fetal medicine.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Human Anatomy Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/fetus\"\u003eFetus necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/blastocyst\"\u003eBlastocyst necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/4-cell-embryo\"\u003e4 cell embryo necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/uterus\"\u003eUterus necklace H | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy does the embryonic period matter so much clinically?\u003c\/h3\u003e\n\u003cp\u003eBecause almost every structural birth defect originates here. Neural tube defects (spina bifida, anencephaly) trace to a failure of neural-tube closure around week 4. Cardiac defects originate from week 4-7 heart-tube folding errors. Cleft lip and palate trace to facial-prominence fusion in weeks 5-7. Limb defects trace to the limb-bud signalling in weeks 4-8. The embryonic period is also the window of maximum teratogenic vulnerability, which is why folate supplementation, alcohol avoidance, and careful drug selection in early pregnancy matter so much. A single environmental exposure during these weeks can produce lifelong structural consequences that would be impossible later.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat changes when an embryo becomes a foetus?\u003c\/h3\u003e\n\u003cp\u003eThe vocabulary, mostly. Around week 9 (after fertilisation, week 11 from last menstrual period) the embryo is conventionally called a foetus, marking the end of organogenesis and the start of a long growth-and-maturation phase. The structural body plan is essentially complete by week 8, and from week 9 onward the foetus mostly grows, refines existing structures, and develops functional capacity (breathing movements, swallowing, cortical development). The embryonic-foetal boundary is a clinical convention more than a biological one, but it marks a real transition in the kind of changes happening week to week.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e24 mm pendant in 925 sterling silver, nickel-free. 45 cm sterling silver chain with a 5 cm extender. Ships free worldwide via DHL Express in 1-5 business days, with all import duties prepaid. Comes in a ready-to-gift jewelry box with the 30-day “Love It or Return It” policy.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eNot currently. The embryo pendant is silver only. The catalog has gold versions of the fetus and the blastocyst if a paired silver-gold gift in early human development is the goal.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":14963577421887,"sku":"NK0122-S","price":200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/172_embryo_silver.png?v=1709035019"},{"product_id":"platypus-skull","title":"platypus skull necklace | silver","description":"\u003ch2\u003eplatypus skull necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe platypus is the world's oldest secret. A mammal that lays eggs. A predator with a duck's bill and venomous spurs. A body containing the genetic code of reptiles, birds, and mammals all woven into one living fossil that has remained almost unchanged for a hundred million years. A 30 mm sterling silver pendant shaped like the skull of one of Earth's strangest survivors.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the Platypus Skull\u003c\/h2\u003e\n\u003cp\u003eOrnithorhynchus anatinus is a monotreme mammal found only in eastern Australia. It is one of only five egg-laying mammals in the world, along with four echidna species. The platypus combines traits so unusual that European naturalists who first encountered preserved specimens thought them to be elaborate hoaxes. The leathery bill is not a beak but a electroreceptor and mechanoreceptor organ, covered in sensitive pits that detect electrical fields and prey movement underwater. The platypus dives with its eyes closed, navigating by bill sensation alone. Males carry venomous spurs on the hind legs, a rare trait among living mammals. The genome is a chimera of reptilian, avian, and mammalian genes. The monotremes are considered the most basal living mammals, having split from the therian (placental and marsupial) lineage roughly 166 million years ago. The platypus has remained largely unchanged since the Miocene.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eevolutionary biologists and developmental geneticists studying monotreme evolution and the earliest mammalian lineages\u003c\/li\u003e\n\u003cli\u003ebehavioral ecologists interested in the sensory world of aquatic foragers and electroreception\u003c\/li\u003e\n\u003cli\u003econservation biologists working on Australian endemic species and freshwater ecosystem health\u003c\/li\u003e\n\u003cli\u003epeople who love the strange grace of animals that exist outside the familiar categories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who has always believed that the platypus is the most honest animal on Earth.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Animal Skull Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/seahorse-skeleton\"\u003eSeahorse skeleton necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/seahorse-skeleton-18k-gold-plated\"\u003eSeahorse skeleton necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/lizard-earrings\"\u003eLizard skeleton earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/raven-skull\"\u003eRaven skull necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/macaque-skull\"\u003eMacaque skull necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eHow is the platypus considered a mammal if it lays eggs?\u003c\/h3\u003e\n\u003cp\u003eMammals are defined by several traits including hair, milk production, and a specialized brain region (the neocortex). The platypus has all of these. It produces milk to feed its young, though it lacks nipples and instead secretes milk through pores in the skin for babies to lap up. Egg-laying is ancestral. The very earliest mammals 200 million years ago laid eggs. Most lineages evolved live birth, but monotremes retained the ancestral strategy. Classification is based on the entire evolutionary package, not one trait.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy does the male platypus have venomous spurs?\u003c\/h3\u003e\n\u003cp\u003eVenom in platypus males is used during breeding season when males compete for females. The venom is delivered by spurs on the hind legs and causes severe pain in rivals. The venom is seasonal and is produced only during the mating months. This is thought to be a weapon for male-male competition, not predation. Monotreme venom is an ancient trait, inherited from a reptilian ancestor and retained when other mammals lost it.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size is the pendant and what chain comes with it?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, 30 mm pendant on a 45 cm sterling silver chain (ø 1.8 mm) with lobster clasp and 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version?\u003c\/h3\u003e\n\u003cp\u003eThis pendant is currently available in silver only. No gold version exists at this time.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":15134275862591,"sku":"NK0276-S","price":195.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/175_platypus_silver.png?v=1709034200"},{"product_id":"mix-n-match-adenine-thymine","title":"adenine - thymine earrings | silver","description":"\u003ch2\u003eAdenine-thymine earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eAdenine on one ear, thymine on the other. The two bases that pair across every strand of every double helix in every cell, worn the same way they sit in DNA: paired but on opposite sides. A small piece of biochemistry that lands if you have spent time thinking about why these two bases recognise each other.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the A-T Pair\u003c\/h2\u003e\n\u003cp\u003eAdenine and thymine pair through two hydrogen bonds in the Watson-Crick geometry, one fewer than the cytosine-guanine pair. That smaller bond count makes AT-rich regions of DNA easier to unwind, which has functional consequences across genetics. Promoter regions in many genes are AT-rich because they need to open easily for transcription factors and RNA polymerase to access the template strand. The TATA box, a short conserved AT-rich sequence found upstream of many eukaryotic genes, is recognised by the TATA-binding protein, which kinks the DNA and helps position the polymerase. The physical tendency of AT-rich sequences to denature easily is therefore not a bug but a recurring evolutionary feature wherever DNA needs to open under control.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003emolecular biologists and geneticists\u003c\/li\u003e\n\u003cli\u003ebiochemists studying nucleic acid structure or transcription\u003c\/li\u003e\n\u003cli\u003escience educators teaching base pairing\u003c\/li\u003e\n\u003cli\u003eanyone wanting to wear the Watson-Crick pair as a paired set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOften paired with the cytosine-guanine earrings to cover all four DNA bases between two ear pairs.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/adenine\"\u003eAdenine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/thymine\"\u003eThymine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/mix-n-match-cytosine-guanine\"\u003eCytosine-guanine earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cytosine-guanine\"\u003eCytosine-guanine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna\"\u003eDNA double helix necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs this a working scientist gift or a science-fan gift?\u003c\/h3\u003e\n\u003cp\u003eBoth, but the audience tilts towards working scientists. Molecular biologists, geneticists, and biochemists tend to read the AT pair as a quiet reference to the topology of the DNA helix. Science educators wear it for the same reason. The earrings still work as a science-fan gift, especially if the recipient is the kind of person who can name the four bases and tell you which pair forms three hydrogen bonds and which forms two.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy pair adenine and thymine rather than picking one base?\u003c\/h3\u003e\n\u003cp\u003eBecause the pair is the unit of meaning in DNA. A single base on its own is half of a coded letter. The pair is the letter. Wearing one base on each ear references the way the two strands of DNA come together: each base on one strand is hydrogen-bonded to its complement on the other. The earrings carry that geometry.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are the earrings and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver. Each pendant is 12 mm, suspended from a 17.5 mm sterling silver hoop. Nickel-free and hypoallergenic, no chain. Ships free worldwide via DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre there matching earrings for the cytosine-guanine pair?\u003c\/h3\u003e\n\u003cp\u003eYes. The cytosine-guanine earrings exist as a parallel set, also in sterling silver, also 12 mm pendants on 17.5 mm hoops. Buyers who want all four DNA bases on one head usually pick up both pairs at once.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":15197628170303,"sku":"ER0001-S","price":150.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/032_adeninethymineearrings.png?v=1709033855"},{"product_id":"mix-n-match-cytosine-guanine","title":"cytosine - guanine earrings | silver","description":"\u003ch2\u003eCytosine-guanine earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eCytosine on one ear, guanine on the other. The stronger of the two Watson-Crick pairs, three hydrogen bonds rather than two. The base pair that holds the double helix together when AT-rich regions have already separated. Worn the same way the bases sit across the helix, paired but on opposite sides.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind the C-G Pair\u003c\/h2\u003e\n\u003cp\u003eCytosine and guanine pair through three hydrogen bonds in the Watson-Crick geometry, one more than the A-T pair. The thermodynamic consequence is that GC-rich DNA sequences melt at higher temperatures, which is one of the first things any molecular biologist learns to factor in when designing PCR primers or interpreting denaturation curves. Beyond simple stability, cytosine-guanine dinucleotides (CpG sites) are the targets of DNA methylation, the primary epigenetic modification in mammals. The combination of structural strength and chemical modifiability is what makes the G-C pair carry both the physical scaffold of the genome and a layer of regulatory information on top.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003emolecular biologists and epigenetics researchers\u003c\/li\u003e\n\u003cli\u003ebiochemists studying nucleic acid structure or DNA repair\u003c\/li\u003e\n\u003cli\u003escience educators\u003c\/li\u003e\n\u003cli\u003eanyone who wants the strong base pair as a paired earring set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOften paired with the adenine-thymine earrings to cover all four DNA bases, two pairs across two ear pairs.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cytosine\"\u003eCytosine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/guanine\"\u003eGuanine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/mix-n-match-adenine-thymine\"\u003eAdenine-thymine earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cytosine-guanine\"\u003eCytosine-guanine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/cytosine-guanine-18k-gold-plated\"\u003eCytosine-guanine necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre these for working scientists or for science fans?\u003c\/h3\u003e\n\u003cp\u003eBoth, but the audience leans towards working scientists. Molecular biologists, geneticists, and epigenetics researchers tend to read the C-G pair as a quiet reference to the topology and chemistry of the DNA helix. Science educators wear them for the same reason. The earrings still work for science fans, especially anyone who can name the four bases and tell you which pair forms three hydrogen bonds and which forms two.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy pair cytosine and guanine rather than picking one base?\u003c\/h3\u003e\n\u003cp\u003eBecause the pair is the unit of meaning in DNA. A single base on its own is half of a coded letter. The pair is the letter. Wearing one base on each ear references the way the two strands of DNA come together: each base on one strand is hydrogen-bonded to its complement on the other. The earrings carry that geometry, and the C-G pair specifically is the stronger of the two.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are the earrings and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver. Each pendant is 13 mm, suspended from a 17.5 mm sterling silver hoop. Nickel-free and hypoallergenic, no chain. Ships free worldwide via DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre there matching earrings for the adenine-thymine pair?\u003c\/h3\u003e\n\u003cp\u003eYes. The adenine-thymine earrings exist as a parallel set, also in sterling silver, with 12 mm pendants on the same 17.5 mm hoops. Buyers building both DNA base pairs as a paired collection usually pick up both sets at once.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":15197643046975,"sku":"ER0015-S","price":150.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/031_cytosineguanineearrings.png?v=1709035363"},{"product_id":"ethanol-earrings","title":"ethanol earrings | silver","description":"\u003ch2\u003eEthanol earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eTwo carbons and an oxygen, hydrogen-bonded enough to cross the blood-brain barrier within minutes of being absorbed in the gut. Ethanol is the most globally familiar psychoactive molecule, the one almost everyone has a personal pharmacology relationship with. Worn here as a 19 mm sterling silver leverback earring set.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Ethanol\u003c\/h2\u003e\n\u003cp\u003eEthanol acts on two main targets in the brain. It potentiates GABA-A receptors, the dominant inhibitory receptor system, and it inhibits NMDA glutamate receptors, the dominant excitatory receptor system. The net effect is reduced neural excitation, which produces sedation, anxiolysis, and at higher doses anaesthesia. In the liver, alcohol dehydrogenase converts ethanol to acetaldehyde, then aldehyde dehydrogenase converts acetaldehyde to acetic acid. The ALDH2*2 variant, common in East Asian populations, slows the second step. The result is the alcohol flush reaction: facial flushing, nausea, and tachycardia within minutes of even a small dose. Same molecule, different metabolic equipment, very different experience of the same drink.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ebiochemists and pharmacologists\u003c\/li\u003e\n\u003cli\u003eneuroscientists studying GABA or glutamate systems\u003c\/li\u003e\n\u003cli\u003echemistry students and educators\u003c\/li\u003e\n\u003cli\u003eanyone who likes the idea of wearing a molecule they encounter regularly and understand at depth\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOften paired with the silver or gold ethanol necklace as a matched set, especially as a milestone gift between two people who shared a chemistry programme.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Molecules Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/ethanol\"\u003eEthanol necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/ethanol-necklace-gold-vermeil\"\u003eEthanol necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/caffeine-earrings\"\u003eCaffeine earrings | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/glutamate\"\u003eGlutamate necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine\"\u003eDopamine necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs the ethanol pendant a serious gift, or is it a joke about drinking?\u003c\/h3\u003e\n\u003cp\u003eMost often a serious gift. Biochemists and neuroscientists who buy it almost always frame it as a reference to the molecule's pharmacology, not its recreational use. The earrings work the same way: a quiet nod to the molecule that more than half of clinical pharmacology depends on understanding. Whether the recipient also enjoys a glass of wine is incidental.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy earrings rather than a necklace for ethanol?\u003c\/h3\u003e\n\u003cp\u003eThe earrings sit at a smaller, more daily scale. The full ethanol necklace at \/products\/ethanol gives a single visible molecule on the chest. The earrings carry two of them, one per ear, which works for people who already have a chest pendant or who prefer ethanol as a smaller daily-wear reference rather than a statement piece.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size are the earrings and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver. Each pendant is 19 mm, suspended from a sterling silver leverback hook. Nickel-free and hypoallergenic, no chain. Ships free worldwide via DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs there a gold version of these earrings?\u003c\/h3\u003e\n\u003cp\u003eNot at present. Ethanol is available as a sterling silver or 18K gold vermeil necklace if a gold ethanol piece is the goal. The mix-and-match earring format currently comes in sterling silver only.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":15465341386815,"sku":"ER0029-S","price":190.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/046_ethanolearrings.png?v=1700037652"}],"url":"https:\/\/sciencejewelry1824.shop\/collections\/frontpage.oembed?page=11","provider":"sciencejewelry1824","version":"1.0","type":"link"}