{"title":"Birthday gifts","description":"\u003cp\u003eA birthday gift for someone who loves science works best when it points at what they actually love. Not a generic token, but the molecule, the cell, or the structure they would recognise across a room.\u003cbr\u003e\u003cbr\u003eThis is a selection of the pieces people reach for most: DNA, the neuron, dopamine and serotonin, the antibody, the anatomical heart, in necklaces, rings, and earrings, sterling silver and 18K gold vermeil. Choose by the field or the idea they are drawn to, and it reads as paying attention rather than guessing.\u003cbr\u003e\u003cbr\u003eThere's much more across the \u003ca href=\"\/collections\/all\"\u003efull catalogue\u003c\/a\u003e if you'd like to keep looking.\u003c\/p\u003e","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":155.0,"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":"horizontal-dna","title":"DNA necklace H | silver","description":"\u003ch2\u003eDNA necklace H | sterling silver\u003c\/h2\u003e\n\u003cp\u003eTwo backbones, ten base pairs per turn, one continuous spiral. The horizontal pendant captures the double helix at its most readable, both strands extended at full width with the major and minor grooves spread across the pendant. Sterling silver, 30 mm, the form of the molecule everyone draws on a whiteboard.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind the Horizontal Helix\u003c\/h2\u003e\n\u003cp\u003eThe major groove and the minor groove are the two channels running along the helix where the backbone strands sit farther apart or closer together. The major groove is wide enough for proteins to read the DNA sequence directly, without separating the strands. That is how every transcription factor finds its target gene, how restriction enzymes locate their cut sites, how zinc-finger and homeodomain proteins recognise their motifs. The minor groove is narrower and harder to read directly, but several drugs slide into it and disrupt DNA function from there: distamycin, netropsin, and a class of antibiotics that target bacterial replication. The horizontal orientation of this pendant shows both grooves clearly because the helix sits with its full width visible. It is also the orientation almost everyone draws by default, the textbook form, the conference-poster form, the classroom-whiteboard form.\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 every week\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 by working scientists who want the molecule on them in the lab and at conferences. Sterling silver because gold reads as the gift version of the same piece.\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-18k-gold-plated\"\u003eDNA necklace H | 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\/dna-18k-gold-plated\"\u003eDNA necklace V | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/circular-dna\"\u003eCircular DNA necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dna-earrings\"\u003eDNA 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;\"\u003eWhat's the difference between the horizontal and vertical DNA necklaces?\u003c\/h3\u003e\n\u003cp\u003eThe molecule is identical. The orientation isn't, and neither is the way the chain attaches. The horizontal version (H, this one) 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 backbones extend at full width across the pendant, with the major and minor grooves spread across the visible face. The vertical version (V) 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. Both show the molecule from the side. H tends to be the choice when people want the structure unmistakable from across a room. 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 is 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. At any other orientation, one groove obscures the other.\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 in sterling silver (925), nickel-free and hypoallergenic, on a 45 cm sterling silver 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: H silver, H gold, V silver, or V gold?\u003c\/h3\u003e\n\u003cp\u003ePick by orientation first, material second. If you want the helix unmistakable from across a room, go horizontal (H). If you want it discreet, go vertical (V). After that, sterling silver reads as the working scientist's everyday choice, the lab and conference piece. Gold vermeil reads as the milestone version of the same molecule, more often picked as a gift or after a defence. The silver H, this one, is the most-bought of the four. It is the form most people picture when they think of DNA jewelry.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":26432752327,"sku":"NK0097-S","price":155.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/dna-necklace-h-silver-necklaces-science-jewelry-sciencejewelry1824-51351786160476.png?v=1698775995"},{"product_id":"oxytocin-flat","title":"oxytocin necklace | silver","description":"\u003ch2\u003eOxytocin necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eOxytocin is the molecule that holds humans together. Labour contractions and milk letdown at birth. Mother-infant attachment in the first hours of life. Pair bonding, social trust, the neurochemistry of touch and recognition. One small peptide doing the work that holds families and partnerships together.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Oxytocin\u003c\/h2\u003e\n\u003cp\u003eOxytocin is a cyclic nonapeptide with the sequence Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2, with a disulfide bond between the two cysteine residues at positions 1 and 6. Vincent du Vigneaud determined oxytocin's structure and synthesized it in 1953, the first peptide hormone to be sequenced and synthesized, earning him the 1955 Nobel Prize in Chemistry. Oxytocin's structural relative, vasopressin (antidiuretic hormone), differs at only two amino acid positions yet has entirely different functions: vasopressin regulates water retention and vasoconstriction, while oxytocin drives labour contractions and social bonding. The structural similarity creates some cross-reactivity at each other's receptors. Oxytocin is used clinically as Pitocin for labour induction and postpartum haemorrhage, saving countless lives since its synthesis.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ebiochemists and peptide chemists who have studied peptide synthesis\u003c\/li\u003e\n\u003cli\u003eobstetricians and reproductive medicine specialists\u003c\/li\u003e\n\u003cli\u003eneuroscientists studying social behaviour and bonding\u003c\/li\u003e\n\u003cli\u003eanyone who wants to carry the first peptide hormone ever synthesized\u003c\/li\u003e\n\u003c\/ul\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-18k-gold-plated\"\u003eOxytocin necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/oxytocin-3d-1\"\u003eOxytocin 3D 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\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin-vertical\"\u003eSerotonin necklace V | 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 peptide chemist recognise this?\u003c\/h3\u003e\n\u003cp\u003eYes. Oxytocin is the landmark peptide. Du Vigneaud's synthesis proved you could make a complex peptide hormone with biological activity using chemistry alone. For anyone who has studied peptide chemistry or biochemistry, this ring shape is the definition of achievement.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the difference between this flat version and the 3D structure?\u003c\/h3\u003e\n\u003cp\u003eThe flat version shows the amino acid sequence and the disulfide bond in two dimensions, emphasizing chemical identity and the ring closure. The 3D version shows the actual three-dimensional conformation and molecular geometry. Both are accurate. One is schematic, one is sculptural. Many buy both to show the progression from sequence to structure.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size, material, and chain?\u003c\/h3\u003e\n\u003cp\u003e62 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 the same size?\u003c\/h3\u003e\n\u003cp\u003eYes. Oxytocin flat is available in 18k gold vermeil at 62 mm. Same Nobel-winning peptide structure, same ring closure, same meaning. Material is the only difference. Many biochemists pair both the silver and gold as a tribute to du Vigneaud's achievement.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":26503846535,"sku":"NK0257-S","price":175.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/oxytocin-necklace-silver-necklaces-science-jewelry-sciencejewelry1824-51377614127452.png?v=1699008553"},{"product_id":"dopamine-polished-silver","title":"dopamine ring | silver","description":"\u003ch2\u003eDopamine ring | sterling silver\u003c\/h2\u003e\n\u003cp\u003eDopamine on the hand. The same hand that Parkinson's patients lose fine motor control of as the dopamine neurons in the substantia nigra are progressively lost. The molecule of voluntary movement, worn where movement happens. A ring for the neurologist, the movement-disorder specialist, or the researcher who carries that significance daily.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Dopamine\u003c\/h2\u003e\n\u003cp\u003eParkinson's disease is the cleanest demonstration that dopamine is essential for voluntary movement. The nigrostriatal pathway, dopamine neurons projecting from the substantia nigra pars compacta to the caudate and putamen, provides the tonic dopamine signal that allows the basal ganglia to facilitate movement. As these neurons die through mechanisms still being unpicked (alpha-synuclein aggregation is part of the story), the basal ganglia circuit loses its permissive dopamine tone and becomes locked in inhibitory overdrive. The result is the characteristic motor signature: bradykinesia, rigidity, resting tremor, postural instability. L-DOPA partially compensates by giving surviving neurons a precursor to convert. As neuron loss progresses, L-DOPA efficacy wanes and dyskinesias emerge.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eneurologists and movement disorder specialists\u003c\/li\u003e\n\u003cli\u003eParkinson's disease researchers\u003c\/li\u003e\n\u003cli\u003eneuroscience students and educators\u003c\/li\u003e\n\u003cli\u003epatients and families whose lives have been shaped by Parkinson's\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor the movement-disorder specialist who thinks in dopamine pathways, on the hand that prescribes L-DOPA.\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-vertical\"\u003eDopamine necklace V | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-horizontal\"\u003eDopamine necklace H | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-studs\"\u003eDopamine studs | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin-polished-silver\"\u003eSerotonin ring | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/mix-n-match-dopamine-serotonin\"\u003eDopamine-serotonin 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;\"\u003eIs this a clinician's piece or a patient's piece?\u003c\/h3\u003e\n\u003cp\u003eBoth, in roughly equal measure. People who prescribe L-DOPA, manage deep brain stimulation, or run movement-disorder clinics buy it as professional identification. People living with Parkinson's, or close to someone with it, buy it as a way of carrying the molecule whose loss has shaped daily life. The pendant reads honestly to both audiences without overclaiming for either.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is dopamine in Parkinson's, not just in reward?\u003c\/h3\u003e\n\u003cp\u003eBecause the neurons that die in Parkinson's are nigrostriatal dopamine neurons, not the mesolimbic dopamine neurons associated with reward and motivation. The reward story is real but partial. The motor story is the story Parkinson's tells: dopamine is the neurotransmitter the basal ganglia need to permit movement at all. Without it, voluntary motor control degrades from the bottom up.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat sizes are available, and what is the return policy?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, available in US ring sizes 5 to 9 (including a half-size 5.5). 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 necklace or studs version?\u003c\/h3\u003e\n\u003cp\u003eYes. Dopamine is available as a sterling silver necklace in two orientations (vertical and horizontal), as silver studs, and paired with serotonin in the mix-and-match earring set. Buyers building a daily-wear neurotransmitter set sometimes pick the ring alongside one of the necklace formats.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"5","offer_id":56545554039170,"sku":"RG0012-S-5","price":145.0,"currency_code":"EUR","in_stock":true},{"title":"5.5","offer_id":56545554071938,"sku":"RG0012-S-55","price":145.0,"currency_code":"EUR","in_stock":true},{"title":"6","offer_id":56545554104706,"sku":"RG0012-S-6","price":145.0,"currency_code":"EUR","in_stock":true},{"title":"7","offer_id":56545554137474,"sku":"RG0012-S-7","price":145.0,"currency_code":"EUR","in_stock":true},{"title":"8","offer_id":56545554170242,"sku":"RG0012-S-8","price":145.0,"currency_code":"EUR","in_stock":true},{"title":"9","offer_id":56545554203010,"sku":"RG0012-S-9","price":145.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/009_dopamine_silver.png?v=1699374696"},{"product_id":"heartbeat-2","title":"heartbeat ring | silver","description":"\u003ch2\u003eHeartbeat ring | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe QRS complex is the most reproduced waveform in clinical medicine, the spike that signals normal sinus rhythm and the line that everyone, from intensivists to first responders to anxious patients, watches first on the monitor. As a ring, it sits on the finger as a quiet daily reminder of the rhythm that keeps the rest of the body running.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science of the Heartbeat Trace\u003c\/h2\u003e\n\u003cp\u003eThe standard ECG waveform follows a fixed sequence: P wave (atrial depolarisation), QRS complex (ventricular depolarisation), T wave (ventricular repolarisation), and sometimes a U wave at the end. The shape is the surface manifestation of the spread of electrical activity from the sinoatrial node to the atria, through the atrioventricular node, down the bundle of His and Purkinje fibres into the ventricular myocardium. Cardiologists, emergency physicians, intensivists, and paramedics read these traces dozens of times a day, looking for ST-elevation in acute MI, QT prolongation, atrial fibrillation, ventricular tachycardia, hyperkalaemia, and the long catalogue of conduction abnormalities. The same waveform plotted in real time runs continuously on every cardiac monitor in every ICU and operating room in the world. It sits somewhere between the stethoscope and the white coat as a near-universal medical signifier.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cp\u003eThe audience clusters around acute and cardiac medicine:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ecardiologists, electrophysiologists, and EP fellows\u003c\/li\u003e\n\u003cli\u003eemergency physicians, paramedics, and prehospital teams\u003c\/li\u003e\n\u003cli\u003eICU and CCU nurses, intensivists, and respiratory therapists\u003c\/li\u003e\n\u003cli\u003eanesthesiologists and CRNAs\u003c\/li\u003e\n\u003cli\u003ecardiac sonographers, ECG technicians, and medical students through cardiology rotations\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\/heartbeat\"\u003eHeartbeat necklace | silver\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\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heartbeat-earring-hoops\"\u003eHeartbeat earring hoops | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/heartbeat-studs\"\u003eHeartbeat studs | 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 cardiology fellow actually wear a ring like this?\u003c\/h3\u003e\n\u003cp\u003eMore often than the format would suggest. Rings sit lower-profile than pendants and tend to read as professional shorthand rather than as overt jewelry, which works well in clinical settings. Cardiology, electrophysiology, and ICU clinicians are the strongest cluster. Anesthesiologists and ECG technicians also tend to recognise the trace immediately. The ring works as a quiet professional in-joke for someone whose week is built around reading rhythm strips.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is the QRS complex always drawn as the largest deflection?\u003c\/h3\u003e\n\u003cp\u003eBecause ventricular depolarisation involves much more myocardial mass than atrial depolarisation. The two ventricles together account for roughly two-thirds of the heart's muscle, and the rapid spread of excitation through the bundle branches and Purkinje system depolarises that mass within about 80 to 100 milliseconds. The summed electrical vector is large and brief, which produces the tall narrow QRS spike. The P wave, by contrast, is the slower depolarisation of a much smaller mass of atrial muscle, which is why it shows up as a low rounded bump.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the size and material?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver, nickel-free, available in US ring sizes 5, 6, 7, 8, and 9. 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;\"\u003eHow do I pick the right ring size?\u003c\/h3\u003e\n\u003cp\u003eThe five available sizes (US 5 through 9) cover most adult fingers. If the recipient's ring size is unknown, US 7 is the most commonly bought middle-of-the-range size for women and US 9 is more typical for men. A printable ring sizer or a quick measurement around the intended finger with a strip of paper gives the closest fit. The 30-day return policy also covers exchanges if the size is off.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"5","offer_id":56545552269698,"sku":"RG0019-S-5","price":140.0,"currency_code":"EUR","in_stock":true},{"title":"6","offer_id":56545552302466,"sku":"RG0019-S-6","price":140.0,"currency_code":"EUR","in_stock":true},{"title":"7","offer_id":56545552335234,"sku":"RG0019-S-7","price":140.0,"currency_code":"EUR","in_stock":true},{"title":"8","offer_id":56545552368002,"sku":"RG0019-S-8","price":140.0,"currency_code":"EUR","in_stock":true},{"title":"9","offer_id":56545552400770,"sku":"RG0019-S-9","price":140.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/heartbeat-ring-silver-rings-science-jewelry-sciencejewelry1824-51402443161948.png?v=1699272256"},{"product_id":"saturn-1","title":"saturn ring | silver","description":"\u003ch2\u003eSaturn ring | sterling silver\u003c\/h2\u003e\n\u003cp\u003eSaturn is the only planet in the Solar System whose rings are visible through a backyard telescope, and the most distinctive object the unaided human eye has ever recognised as something other than a star. As a ring on a finger, it lands as a small joke that scientists tend to enjoy: one of Saturn's rings, worn as a ring.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Astronomy of Saturn\u003c\/h2\u003e\n\u003cp\u003eSaturn is the sixth planet from the Sun and the second-largest in the Solar System. The ring system extends from about 7,000 km to 80,000 km above the equator (some 280,000 km from edge to edge), but its vertical thickness is only 10 metres to 1 kilometre, which is what makes the rings essentially disappear when viewed edge-on every 14-15 years. The rings are predominantly water ice with rocky and dusty inclusions, ranging from sub-millimetre particles to chunks several metres across. The major divisions (A, B, C rings, with the Cassini Division between A and B) are gaps maintained by orbital resonances with Saturn's moons. The Cassini-Huygens mission (2004 to 2017) transformed our understanding of the rings, the moons, and the polar hexagonal jet stream, and Saturn remains a flagship target for planetary science.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cp\u003eThe audience clusters around astronomy and planetary science:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eprofessional astronomers and planetary scientists\u003c\/li\u003e\n\u003cli\u003eNASA, ESA, and JAXA mission scientists, especially Cassini-Huygens veterans\u003c\/li\u003e\n\u003cli\u003eamateur astronomers whose first telescope view of Saturn became a personal landmark\u003c\/li\u003e\n\u003cli\u003eastronomy educators, planetarium staff, and outreach professionals\u003c\/li\u003e\n\u003cli\u003escience teachers using Saturn as a default example of planetary geometry\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe ring form is part of the meaning. A Saturn ring is not a symbol of the planet, it is a wearable reference to the planet's own ring system.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eExplore Related Math \u0026amp; Physics Jewelry\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/saturn-18k-gold-plated\"\u003eSaturn necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/orion\"\u003eOrion necklace L | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/ursa-major\"\u003eUrsa Major necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/math-physics-collection\"\u003eMath \u0026amp; Physics collection\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 ring rather than a pendant for Saturn?\u003c\/h3\u003e\n\u003cp\u003eBecause the planet itself wears its own rings, and a ring on a finger reads as a wearable version of that. Most astronomy jewelry takes constellations or planet shapes and renders them flat as pendants. The Saturn ring uses the form to do the work the picture would have done: the geometry is the meaning, the wearer is wearing one of Saturn's rings.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat are Saturn's rings actually made of?\u003c\/h3\u003e\n\u003cp\u003eMostly water ice, with rocky and dusty inclusions. Particle sizes range from sub-millimetre to several metres, distributed in a layer that is 280,000 kilometres across at its widest but only 10 metres to 1 kilometre thick vertically. The Cassini Division (the dark gap visible in even small telescopes) is maintained by an orbital resonance with the moon Mimas. The rings are remarkably young in geological terms: Cassini measurements suggest they may only be 10 to 100 million years old, which means the planet has not always looked the way we see it now.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size does the ring come in?\u003c\/h3\u003e\n\u003cp\u003eAvailable in US sizes 5, 6, 7, 8, and 9. If you are between sizes, size up. The ring sits against the finger comfortably and a slightly loose fit reads better than a tight one. Crafted in 925 sterling silver, nickel-free, with a high-polish finish. 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 astronomer get the joke?\u003c\/h3\u003e\n\u003cp\u003eYes. The ring-on-a-ring read is one of the most consistently appreciated things in the astronomy range. People who have spent a career on Saturn (or on any of the Cassini-era missions) tend to register the form immediately and like it more for being subtle.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"5","offer_id":56545549091202,"sku":"RG0025-S-5","price":145.0,"currency_code":"EUR","in_stock":true},{"title":"6","offer_id":56548235837826,"sku":"RG0025-S-6","price":145.0,"currency_code":"EUR","in_stock":true},{"title":"7","offer_id":56548235870594,"sku":"RG0025-S-7","price":145.0,"currency_code":"EUR","in_stock":true},{"title":"8","offer_id":56548235903362,"sku":"RG0025-S-8","price":145.0,"currency_code":"EUR","in_stock":true},{"title":"9","offer_id":56548235936130,"sku":"RG0025-S-9","price":145.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/021_saturn_silver.png?v=1699716453"},{"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":200.0,"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":"anatomical-heart-necklace","title":"anatomical heart necklace | silver","description":"\u003ch2\u003eAnatomical heart necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eAn anatomical heart necklace for cardiologists, surgeons, and anyone who prefers the real thing to the cartoon. The four-chambered pump that beats roughly 100,000 times a day without instruction, in sterling silver.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Anatomy of the Heart\u003c\/h2\u003e\n\u003cp\u003eThe heart is two pumps in one organ. The right side moves deoxygenated blood to the lungs, the left side pushes oxygenated blood through the body. Four chambers, four valves, and a small bundle of specialised cells in the right atrium that sets the rhythm. The structure most people draw with two curves and a dimple is, in fact, an asymmetric muscle about the size of a closed fist, sitting slightly left of centre and tilted forward. The pendant follows the real anatomy: apex pointing down, two atria above, two ventricles below, the great vessels exiting at the top.\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 study, treat, or repair the heart for a living.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ecardiologists, cardiac surgeons, and electrophysiologists\u003c\/li\u003e\n\u003cli\u003enurses and technicians in cardiac care or perfusion\u003c\/li\u003e\n\u003cli\u003emedical students and residents through the cardiology rotation\u003c\/li\u003e\n\u003cli\u003epartners or parents of anyone in the above list\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor the colleague who knows the difference between a textbook heart and a real one.\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\/heart-18k-gold-plated\"\u003eAnatomical heart necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/ventricular-system-necklace-gold-vermeil\"\u003eVentricular system necklace | gold vermeil\u003c\/a\u003e\u003c\/li\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\/electrical-circuit-of-heart\"\u003eElectrical circuit of the heart necklace\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 anatomical heart necklace for?\u003c\/h3\u003e\n\u003cp\u003eIt tends to land with cardiologists, cardiac surgeons, and electrophysiologists, but also with the wider circle around them: cardiac nurses, perfusionists, medical students mid-rotation, and the partners who have learned the difference between an MI and an arrhythmia by osmosis. It also speaks to anyone who finds the cartoon heart a bit thin and prefers the real one.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy doesn't a real heart look like a heart shape?\u003c\/h3\u003e\n\u003cp\u003eThe classic heart symbol probably has nothing to do with the organ. The most common theory traces it to silphium, an extinct plant from ancient Cyrene whose seedpod looked exactly like a Valentine. The real heart is asymmetric, with a rounded base and a pointed apex tilted to the left. Once you have seen one, the cartoon version stops looking right.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size and chain does this come with?\u003c\/h3\u003e\n\u003cp\u003eThe pendant is 20 mm and weighs roughly the same as a coin. It sits on a 45 cm sterling silver chain with a 5 cm extender, so it works at collarbone or just below. Free worldwide DHL Express shipping in 1-5 business days, all import duties included, ships in a ready-to-gift jewelry box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs the anatomy accurate enough for a medical professional?\u003c\/h3\u003e\n\u003cp\u003eYes. The proportions, the chamber positions, and the great vessels are modelled on a real heart, not a stylised one. It will pass inspection from someone who has held one. If accuracy is the worry, this is the version you want.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":52035665927,"sku":"NK0168-S","price":200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/anatomical_correct_heart_necklace_silver.png?v=1726840321"},{"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":160.0,"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":"mitochondrion-silver-and-18k-gold-plated","title":"mitochondrion necklace | silver \u0026 gold vermeil","description":"\u003ch2\u003emitochondrion necklace | silver \u0026amp; gold vermeil\u003c\/h2\u003e\n\u003cp\u003eA mitochondrion necklace for cell biologists, biochemists, and anyone who has spent time staring at the electron transport chain. The organelle that produces the ATP every cell in your body runs on, rendered with a silver outer membrane and a gold vermeil inner cristae structure.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind the Mitochondrion\u003c\/h2\u003e\n\u003cp\u003eMitochondria are the descendants of an ancient bacterium swallowed by an early eukaryotic cell, an idea Lynn Margulis put forward in 1967 and which is now textbook endosymbiotic theory. They have their own circular DNA, divide on their own schedule, and produce roughly 90% of the cell's ATP through oxidative phosphorylation across the inner membrane. The folded inner membrane (the cristae) is where the electron transport chain runs, and where ATP synthase, the rotary enzyme that spins like a tiny molecular turbine, generates the cell's energy currency. Mitochondrial dysfunction sits at the centre of conditions ranging from Leigh syndrome to Parkinson's disease.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cp\u003eFor people whose work touches cellular energy, metabolism, or the long shadow of endosymbiosis.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ecell biologists and biochemists\u003c\/li\u003e\n\u003cli\u003emetabolism researchers and clinicians working on mitochondrial disease\u003c\/li\u003e\n\u003cli\u003emedical students who have memorised the Krebs cycle three times\u003c\/li\u003e\n\u003cli\u003eanyone who refers to mitochondria as \"the powerhouse\" with a slight smile\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor the colleague who would prefer their cellular energy in two metals.\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\/mitochondrion-18k-gold-plated\"\u003eMitochondrion necklace | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/chloroplast\"\u003eChloroplast necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/nuclear-pore\"\u003eNuclear pore necklace | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/ribosomes-necklace-gold-vermeil\"\u003eRibosomes 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 two metals on one piece?\u003c\/h3\u003e\n\u003cp\u003eThe mitochondrion has two distinct membranes, and they do different jobs. The silver outer membrane is permeable and structurally simpler. The gold vermeil inner membrane (folded into cristae) is where the electron transport chain and ATP synthase do the actual energy work. The two-metal design carries the same biological logic as the structure itself.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eIs the cristae geometry biologically accurate?\u003c\/h3\u003e\n\u003cp\u003eThe folded pattern matches what you would see in an electron micrograph: the inner membrane invaginated to maximise surface area, since more cristae mean more room for the respiratory complexes. The shape is stylised for jewelry, but the principle is intact.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat are the materials and chain details?\u003c\/h3\u003e\n\u003cp\u003eSterling silver outer membrane with an 18K gold vermeil inner structure (sterling silver core with 2.5 micron gold plating). The pendant is 28 mm wide. Comes on a 45 cm sterling silver chain with a 5 cm extender. 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;\"\u003eWill the two finishes age at the same rate?\u003c\/h3\u003e\n\u003cp\u003eThe silver portion will develop a faint patina over time, which most people prefer to a brand-new shine. The vermeil holds its colour for years with normal wear. A soft-cloth wipe-down after exposure to perfume or sweat keeps both metals looking right. If the silver darkens more than wanted, a silver polishing cloth restores it without affecting the vermeil.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":13459242778687,"sku":"NK0227-SGV","price":225.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/mitochondrion_necklace.png?v=1750749845"},{"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":155.0,"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":"glucose-earrings","title":"glucose earrings | silver","description":"\u003ch2\u003eGlucose earrings | sterling silver\u003c\/h2\u003e\n\u003cp\u003eGlucose is the primary fuel for every cell. The aldohexose at the centre of metabolism, energy, and the systems that keep us alive. Precision crystal structure, worn as 14 mm sterling silver hoops.\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;\"\u003eA Quiet Symbol For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ebiochemists and cell biologists who teach or study 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 carbohydrate counting\u003c\/li\u003e\n\u003cli\u003eanyone who has sat in biochemistry and suddenly understood how their cells stay alive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor someone who looks at glucose and sees the foundation of everything.\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\/glucose\"\u003eGlucose 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\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\/atp\"\u003eATP 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 gift appropriate for a type 1 diabetic?\u003c\/h3\u003e\n\u003cp\u003eYes, absolutely. Many people living with type 1 diabetes describe glucose as the thing they think about daily, the molecule they manage from infancy onward. For them, the glucose earrings mark that relationship as something meaningful, not something to hide. It's also a strong gift for researchers in diabetes, endocrinology, or metabolic disease.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's different about glucose that makes it so central to metabolism?\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 without degrading, but its six carbons are arranged in a way that makes them easy to break apart and oxidize. Nearly every organism on Earth has evolved glucose metabolism, from bacteria to humans. In humans specifically, the brain burns roughly 120 grams of glucose daily just at rest. Glucose isn't just fuel. It's the fuel.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size and material?\u003c\/h3\u003e\n\u003cp\u003e925 sterling silver hoops, 14 mm pendant size. Come as a pair with surgical steel ear posts. 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 size is the necklace glucose?\u003c\/h3\u003e\n\u003cp\u003eThe glucose necklace is 21 mm, significantly larger than the earrings. Same molecule, different scale and format. The earrings sit at hand distance for conversation. The necklace is centered at the chest. Both are sterling silver unless you prefer gold vermeil.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":30933682094143,"sku":"ER0032-S","price":160.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/044_glucoseearrings.png?v=1709033980"},{"product_id":"serotonin-vertical-18k-gold-plated","title":"serotonin necklace V | gold vermeil","description":"\u003ch2\u003eSerotonin necklace V | gold vermeil\u003c\/h2\u003e\n\u003cp\u003eSerotonin in 18K gold vermeil at 25 mm, hung along the chain axis (the V layout). The molecule that runs through depression, anxiety, and the SSRIs prescribed for both. For people who have spent enough years in clinical psychiatry that the chemical structure has become part of how they think about their patients.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Serotonin\u003c\/h2\u003e\n\u003cp\u003eSerotonin (5-hydroxytryptamine) is synthesised from the amino acid tryptophan via tryptophan hydroxylase and aromatic amino acid decarboxylase. Roughly 90 percent of body serotonin is in the gut, where it regulates motility. The remaining fraction in the central nervous system is produced by neurons in the raphe nuclei and projects throughout the brain. Selective serotonin reuptake inhibitors block the SERT transporter, increasing synaptic serotonin and producing the antidepressant effect that became standard care in the 1990s. The simple monoamine hypothesis of depression has not held up under scrutiny, and the actual mechanism is now thought to involve neuroplasticity changes that take weeks to develop. The molecule is at the centre of that debate.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cp\u003eFor people who think about serotonin as more than a metaphor for happiness.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003epsychiatrists and psychopharmacologists\u003c\/li\u003e\n\u003cli\u003edepression and anxiety researchers\u003c\/li\u003e\n\u003cli\u003eclinical psychologists working on medication management\u003c\/li\u003e\n\u003cli\u003erecipients with personal experience of SSRI therapy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe gold vermeil version is most often given as a milestone gift after a residency, a fellowship, or a personal therapy threshold.\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 V | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-vertical-18k-gold-plated\"\u003eDopamine necklace V | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine\"\u003eDopamine bracelet | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/gaba-necklace-gold-vermeil\"\u003eGABA 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\u003c\/ul\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy serotonin in gold rather than silver?\u003c\/h3\u003e\n\u003cp\u003eThe silver version reads more clinical. The gold vermeil reads as a milestone object: a residency-finish gift, a fellowship marker, or a personal piece for someone whose career has centred on mood disorders.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat does the V (vertical) refer to?\u003c\/h3\u003e\n\u003cp\u003eThe orientation of the pendant. The vertical layout shows the molecule along the chain axis rather than across it. A horizontal version of serotonin exists separately. Same molecule, different way of wearing it.\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, 25 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 25 mm serotonin V 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":31570503270463,"sku":"NK0327-GV","price":165.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/serotonin-necklace-v-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51379659637084.png?v=1699021875"},{"product_id":"caffeine-18k-gold-plated","title":"caffeine necklace | gold vermeil","description":"\u003ch2\u003eCaffeine necklace | 18K gold vermeil\u003c\/h2\u003e\n\u003cp\u003eIn 1819, Friedlieb Ferdinand Runge isolated caffeine from coffee beans at the request of Goethe, who had given him the beans to analyse. The result was the first pure isolation of the world's most-consumed psychoactive molecule. The 18K gold vermeil version of the structure, at 25 mm, the milestone-gift companion to the silver pendant.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Caffeine\u003c\/h2\u003e\n\u003cp\u003eCaffeine is 1,3,7-trimethylxanthine, a methylxanthine that acts as a competitive antagonist at adenosine A1 and A2A receptors. By blocking adenosine signalling, caffeine prevents the gradual sleep pressure adenosine accumulation produces over a waking day. Downstream effects on dopamine and noradrenaline release follow. The wakefulness effect is upstream of dopamine, not direct on it. This is why caffeine and amphetamine, which both increase alertness, work through completely different mechanisms.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ebiochemists and pharmacologists at career milestones\u003c\/li\u003e\n\u003cli\u003ephysicians and researchers in sleep medicine, neuroscience, or metabolism\u003c\/li\u003e\n\u003cli\u003egraduates marking the end of a long thesis fuelled by the molecule itself\u003c\/li\u003e\n\u003cli\u003epartners and family of working scientists looking for a meaningful gold gift\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMost often given on a science graduation, where the gold version reads as recognition of the long hours, often by people who shared the coffee.\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\/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\/dopamine-18k-gold-plated\"\u003eDopamine necklace | gold vermeil\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\/glucose-18k-gold-plated\"\u003eGlucose 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 caffeine over the silver?\u003c\/h3\u003e\n\u003cp\u003eTwo reasons in roughly equal measure. The first is the milestone framing: gold reads as recognition where silver reads as daily wear. The second is straightforward aesthetic preference. Same 25 mm pendant, same chain length, same molecule. The choice is about what the gift is meant to mark, not what caffeine does in the brain.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy does caffeine work on adenosine receptors rather than directly on dopamine?\u003c\/h3\u003e\n\u003cp\u003eBecause adenosine is the molecule that builds up during waking hours and produces sleep pressure. Caffeine fits the adenosine receptor binding pocket well enough to block it without activating it, which is the textbook definition of a competitive antagonist. Once adenosine signalling is blunted, downstream dopamine release is no longer suppressed. The wakefulness effect is upstream of dopamine, not direct on it. This is why caffeine and amphetamine, which both increase alertness, work through completely different mechanisms.\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, 25 mm pendant on a 45 cm gold vermeil chain 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 25 mm caffeine pendant comes in \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/caffeine\"\u003esterling silver\u003c\/a\u003e at the same chain length. Silver tends to suit daily wear, gold tends to suit graduation, retirement, or a major academic appointment.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":31585359724607,"sku":"NK0051-GV","price":170.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/caffeine-necklace-gold-vermeil-necklaces-science-jewelry-sciencejewelry1824-51377746215260.png?v=1699009825"},{"product_id":"dopamine-serotonin-interlocked-silver-gold","title":"dopamine serotonin necklace H | silver \u0026 gold vermeil","description":"\u003ch2\u003eDopamine serotonin necklace H | sterling silver and 18K gold vermeil\u003c\/h2\u003e\n\u003cp\u003eDopamine and serotonin are the two molecules that hold most of psychiatric pharmacology between them. The bicolour pendant is the only mixed-material variant within the wider dopamine-serotonin family, the single piece that carries both finishes on one 40 mm pendant. Worn here as a 40 mm pendant in sterling silver and 18K gold vermeil.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Dopamine and Serotonin\u003c\/h2\u003e\n\u003cp\u003eDopamine is synthesised in the substantia nigra and ventral tegmental area, with the nigrostriatal pathway controlling movement and the mesolimbic pathway encoding reward and motivation. L-DOPA replaces what is lost in Parkinson's disease. Serotonin (5-hydroxytryptamine) is synthesised mostly in the raphe nuclei in the brainstem, projecting widely across cortex and limbic structures, and modulates mood, sleep, satiety, and impulse control. Selective serotonin reuptake inhibitors are the most-prescribed class of antidepressants. The two systems balance against each other across a wide range of psychiatric and neurological conditions, which is why most psychotropic pharmacology targets one or both. Atypical antipsychotics, SNRIs, and bupropion all act somewhere on this two-molecule axis.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003epsychiatrists, clinical psychologists, and psychotherapists working with monoamine pharmacology\u003c\/li\u003e\n\u003cli\u003eneuropharmacologists and translational researchers\u003c\/li\u003e\n\u003cli\u003ebuyers who already own one of the single-material DS pieces and want the bicolour as the second-format pick\u003c\/li\u003e\n\u003cli\u003eanyone who likes the visual contrast of two finishes on one pendant without having to commit to silver or gold alone\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe bicolour variant is the mixed-material pick within the DS family, the one chosen when neither pure silver nor pure gold is the right answer.\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-serotonin-interlocked\"\u003eDopamine serotonin necklace V | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-interlocked-1\"\u003eDopamine serotonin necklace H | 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\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-interlocked-18k-gold-plated-1\"\u003eDopamine serotonin necklace V | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-earring-hoops\"\u003eDopamine serotonin earring hoops | 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 bicolour pendant over the single-material H or V variants?\u003c\/h3\u003e\n\u003cp\u003eFor most buyers, it is about format rather than meaning. The single-material pendants exist as four pieces (silver V, silver H, gold V, gold H), and the bicolour is the fifth option for someone who wants both finishes on a single piece without having to layer two pendants. Same molecules, same 40 mm size, same chain length. Many buyers who already own one of the four single-material pieces eventually pick up the bicolour as a second-format pick.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eAre dopamine and serotonin really the right pair to wear together?\u003c\/h3\u003e\n\u003cp\u003eFor most of practical psychiatry, yes. Atypical antipsychotics modulate D2 and 5-HT2A. SNRIs and bupropion target the dopamine-serotonin axis. Even the SSRI class, which looks pure on paper, has indirect effects on dopaminergic tone via serotonin's modulatory role. Pairing the two molecules captures more of the pharmacology than either one alone, which is why the dopamine-serotonin design exists as a six-format family across pendants and earrings.\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 and 18K gold vermeil over a sterling silver core, 40 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;\"\u003eWhat other formats of the dopamine-serotonin design exist?\u003c\/h3\u003e\n\u003cp\u003eFive others. The single-material pendants are \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-interlocked\"\u003esilver V\u003c\/a\u003e, \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-interlocked-1\"\u003esilver H\u003c\/a\u003e, \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-interlocked-18k-gold-plated\"\u003egold H\u003c\/a\u003e, and \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-interlocked-18k-gold-plated-1\"\u003egold V\u003c\/a\u003e, all 40 mm. The \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-earring-hoops\"\u003eearring hoops\u003c\/a\u003e are the daily-wear conversation-distance format. This bicolour piece is the sixth option for buyers who want both finishes on a single pendant.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":41542316064945,"sku":"NK0109-SGV","price":210.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/012_dop-serhorizontal_silver_vermeil.png?v=1699518482"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/collections\/05-birthday.png?v=1781771626","url":"https:\/\/sciencejewelry1824.shop\/collections\/birthday-gifts.oembed","provider":"sciencejewelry1824","version":"1.0","type":"link"}