{"title":"The longest day","description":"\u003cp\u003eOn 21 June the Northern Hemisphere leans as far toward the sun as it gets. The longest day of the year. These pieces fit the moment: serotonin rises with sunlight, chlorophyll only exists because of it, and the rest are the designs people come back for all year.\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":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":"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":145.0,"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":165.0,"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":"serotonin-horizontal","title":"serotonin necklace H | silver","description":"\u003ch2\u003eSerotonin necklace H | sterling silver\u003c\/h2\u003e\n\u003cp\u003eSerotonin (5-hydroxytryptamine) is the neurotransmitter that runs the moods of mood, the gut motility of digestion, and the platelet-aggregation switch of the bloodstream all from the same simple indole structure. The horizontal layout of the molecule reads as a quieter, more wearable version of the more familiar vertical pendant.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Chemistry of Serotonin\u003c\/h2\u003e\n\u003cp\u003eSerotonin is a monoamine neurotransmitter synthesised from tryptophan via 5-hydroxytryptophan (5-HTP), with the rate-limiting step catalysed by tryptophan hydroxylase. About 90% of the body's serotonin is in the gut, where enterochromaffin cells regulate motility and secretion. The remaining 10% in the central nervous system arises mostly from the raphe nuclei in the brainstem, projecting widely to cortex, limbic system, and spinal cord. Modern psychiatry depends on the serotonin system: SSRIs (fluoxetine, sertraline, escitalopram), SNRIs, MAOIs, triptans for migraine (5-HT1B\/1D agonists), 5-HT3 antagonists for chemo-induced nausea, atypical antipsychotics with 5-HT2A activity. The molecule is small, the receptor diversity is enormous (14 known subtypes), and the clinical reach extends from depression to nausea to migraine to autism research.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eWorn By\u003c\/h2\u003e\n\u003cp\u003eThe audience clusters around neuroscience and psychiatry:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003epsychiatrists and clinical psychologists\u003c\/li\u003e\n\u003cli\u003eneuroscientists studying mood, anxiety, or reward circuits\u003c\/li\u003e\n\u003cli\u003epharmacologists working on serotonergic drugs\u003c\/li\u003e\n\u003cli\u003egastroenterologists studying gut motility and the enteric nervous system\u003c\/li\u003e\n\u003cli\u003emedical students and residents through psychiatry rotations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOften picked by partners or family of working psychiatrists and psychopharmacologists, with the horizontal layout chosen as the quieter daily-wear version of the vertical pendant.\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\/serotonin\"\u003eSerotonin necklace V | silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin\"\u003eDopamine-serotonin 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\/molecules-collection\"\u003eMolecules 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;\"\u003eWhat is the difference between the horizontal and vertical serotonin pendants?\u003c\/h3\u003e\n\u003cp\u003eLayout and chain attachment. The H version sits horizontally on the chest, with the molecule reading left to right. The V version sits vertically, reading top to bottom. Same molecule, same chemistry, same nickel-free silver. Most buyers pick H as the quieter daily-wear option and V as the more pendant-style statement piece.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is gut serotonin so much higher than brain serotonin?\u003c\/h3\u003e\n\u003cp\u003eBecause most serotonin in the body is not about mood, it is about digestion. Enterochromaffin cells in the gut epithelium produce 90% of total body serotonin, regulating motility, secretion, and the vomiting reflex. The blood-brain barrier prevents this gut serotonin from reaching the central nervous system, which is why eating tryptophan-rich food does not directly raise brain serotonin. The two pools (gut and brain) operate independently. Most serotonergic drugs target receptor subtypes that are expressed in one or the other, allowing relatively selective action.\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\u003eYes, in the vertical layout. The horizontal serotonin is silver only for now. The catalog has gold versions of dopamine, dopamine-serotonin, and the vertical serotonin if a paired silver-gold gift in neuroscience is the goal.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":30809286471,"sku":"NK0326-S","price":130.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/serotonin-necklace-h-silver-necklaces-science-jewelry-sciencejewelry1824-51377608196444.png?v=1699008562"},{"product_id":"dopamine-horizontal","title":"dopamine necklace H | silver","description":"\u003ch2\u003eDopamine necklace H | sterling silver\u003c\/h2\u003e\n\u003cp\u003eA dopamine necklace for neuroscientists, psychiatrists, and anyone who recognises the molecule behind reward, motivation, and learning. The horizontal version of the molecule that tells the brain something was worth doing again, in 925 sterling silver.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eThe Science Behind Dopamine\u003c\/h2\u003e\n\u003cp\u003eDopamine is a catecholamine neurotransmitter synthesised from tyrosine. The reward pathway runs from dopamine neurons in the ventral tegmental area to the nucleus accumbens in the ventral striatum. Wolfram Schultz's recordings in primates in the 1990s showed that these neurons fire not in response to reward itself but to reward prediction error, the difference between what was expected and what arrived. Dopamine signals through five receptor subtypes, all G-protein-coupled, divided into D1-like (D1, D5) and D2-like (D2, D3, D4) families. Loss of dopaminergic neurons in the substantia nigra causes the motor symptoms of Parkinson's disease. Dysregulated mesolimbic dopamine signalling is central to the neuroscience of addiction.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top:2em;\"\u003eA Meaningful Gift for Science Lovers\u003c\/h2\u003e\n\u003cp\u003eFor people who can name the receptor subtypes without effort.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eneuroscientists working on reward, motivation, addiction, or motor control\u003c\/li\u003e\n\u003cli\u003epsychiatrists, neurologists, and movement disorder specialists\u003c\/li\u003e\n\u003cli\u003epharmacologists and medicinal chemists working on dopaminergic drugs\u003c\/li\u003e\n\u003cli\u003ePhD students and postdocs in cognitive or systems neuroscience\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor the colleague whose entire research programme rests on understanding why this molecule makes the brain do what it does next.\u003c\/p\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\/dopamine-horizontal-18k-gold-plated\"\u003eDopamine necklace H | gold vermeil\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine\"\u003eDopamine necklace V | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/serotonin-horizontal\"\u003eSerotonin necklace H | sterling silver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-interlocked-1\"\u003eDopamine-Serotonin interlocked 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 neuroscientist actually appreciate this?\u003c\/h3\u003e\n\u003cp\u003eYes. Dopamine is one of the molecules people in the field carry in their heads as a chemical structure, not just a label, and getting the geometry right matters. The pendant renders the molecule with its catechol ring and ethylamine side chain in the recognisable orientation, the same shape that lives in every neuroscience textbook. People who teach this on a slide every semester tend to notice.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat is the difference between the horizontal and vertical dopamine pendants?\u003c\/h3\u003e\n\u003cp\u003eThe molecule is the same. The horizontal version sits sideways on the chain, with the catechol ring and side chain extending across the chest. The vertical version stands upright. The horizontal cut tends to read as quieter and more contemporary, especially open-collar; the vertical reads more emblematic. Both are 925 sterling silver. Neither is more correct than the other, the choice is about how the piece sits.\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 wide, sized to read clearly without dominating the neckline. 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 just the \"happy molecule\" cliche, or is there more to it?\u003c\/h3\u003e\n\u003cp\u003eThe cliche misses what dopamine actually does. It is the molecule of wanting and anticipation, the chemical that tells the brain what to do next, less about pleasure itself than about pursuit. Once you know that, \"happy chemical\" stops being the point. Most people who buy this know the difference, which is why it tends to land well as a gift inside the field rather than outside it.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":38148981639,"sku":"NK0104-S","price":130.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/dopamine-necklace-h-silver-necklaces-science-jewelry-sciencejewelry1824-51379683033436.png?v=1699022048"},{"product_id":"dopamine-serotonin-interlocked-1","title":"dopamine serotonin necklace H | silver","description":"\u003ch2\u003eDopamine serotonin necklace H | sterling silver\u003c\/h2\u003e\n\u003cp\u003eThe horizontal version of the interlocked design, the silver counterpart to the gold-H pendant. Daily-wear scale for someone whose work runs on the dopamine-serotonin axis: psychiatry, neurology, neuropharmacology, the wide field where these two molecules balance against each other across most of clinical practice. Worn here as a 40 mm sterling silver pendant.\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.\u003c\/p\u003e\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Will Recognise It\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003epsychiatrists and clinical psychologists working with monoamine pharmacology\u003c\/li\u003e\n\u003cli\u003eneurologists at the dopamine end of the axis (movement disorders, Parkinson's)\u003c\/li\u003e\n\u003cli\u003eneuropharmacologists and translational researchers\u003c\/li\u003e\n\u003cli\u003emedical students and residents learning the dopamine and serotonin systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe silver-H is the working clinical pair partner to the gold-H milestone version, picked daily by clinicians who prefer the horizontal hang or who already own the silver-V.\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-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\"\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\u003csection class=\"product-faq\"\u003e\n\u003ch2 style=\"margin-top:2em;\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat's the difference between H and V interlocked silver?\u003c\/h3\u003e\n\u003cp\u003eThe orientation, not the molecules. 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 dopamine and serotonin structures, same 40 mm pendant size, same chain length. The choice is aesthetic. H tends to suit a fuller chest line and a slightly more conversational visual. V tends to suit longer necklines and a more formal hang.\u003c\/p\u003e\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy does the silver-H matter when the gold-H exists?\u003c\/h3\u003e\n\u003cp\u003eBecause silver and gold mark different occasions in this catalogue. The gold-H reads as recognition, given at milestones in psychiatry or neurology. The silver-H is the daily clinical-wear pair partner: same orientation, working scale for a lab coat or a clinical setting. Many of the people who already own the gold version eventually pick up the silver for the working day, or the other way round.\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. 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;\"\u003eAre there other versions of the interlocked design?\u003c\/h3\u003e\n\u003cp\u003eYes. The full set is available as \u003ca href=\"https:\/\/sciencejewelry1824.shop\/products\/dopamine-serotonin-interlocked\"\u003esilver V\u003c\/a\u003e, this silver H, \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. Same 40 mm pendant across all four, same interlocked geometry, four ways to wear it depending on material preference and orientation.\u003c\/p\u003e\n\u003c\/section\u003e\n","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":50478250887,"sku":"NK0108-S","price":150.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/silver_dopamine_serotonin_necklace.png?v=1727338825"},{"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":"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":"chlorophyll","title":"chlorophyll necklace | silver","description":"\u003ch2\u003eChlorophyll necklace | sterling silver\u003c\/h2\u003e\n\u003cp\u003eIf you trained on photosynthesis you know chlorophyll is the reason your food exists. The magnesium-centered porphyrin captures red and blue light to power the reaction that produces virtually all atmospheric oxygen and the base of nearly every food chain on Earth.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eThe Science Behind Chlorophyll\u003c\/h2\u003e\n\u003cp\u003eChlorophyll is a porphyrin ring with a magnesium ion at its centre, not iron as in haemoglobin. This substitution shifts the light absorption spectrum into the red and blue wavelengths useful for photosynthesis, while reflecting green light, which is why leaves look green. Photons strike the molecule, lift electrons to excited states, and transfer that energy through antenna complexes to the photosynthetic reaction centre. There, charge separation drives ATP synthesis and CO2 fixation. Richard Willstätter elucidated the chlorophyll structure and won the Nobel Prize in Chemistry in 1915. Chlorophyll exists in all photosynthetic organisms (plants, algae, cyanobacteria). Over billions of years it has generated most of the atmospheric oxygen. Without this molecule, there is no aerobic life.\u003c\/p\u003e\n\n\u003ch2 style=\"margin-top: 2em;\"\u003eWho Reaches For This\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eplant biologists and botanists studying photosynthesis\u003c\/li\u003e\n\u003cli\u003ebiochemists working with porphyrin chemistry or photosynthesis mechanisms\u003c\/li\u003e\n\u003cli\u003eenvironmental scientists and climate researchers\u003c\/li\u003e\n\u003cli\u003eanyone who recognises chlorophyll as the foundation of all terrestrial food chains\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\/caffeine\"\u003eCaffeine necklace | silver\u003c\/a\u003e\u003c\/li\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\/mendels-peas\"\u003eMendel's peas necklace | silver\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\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 a gift for plant scientists?\u003c\/h3\u003e\n\u003cp\u003eYes. Chlorophyll is the reason plants capture light and produce food. Any botanist, plant physiologist, or photosynthesis researcher will understand immediately why this pendant matters. The molecule is foundational to their work.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhy is chlorophyll's structure so important to photosynthesis?\u003c\/h3\u003e\n\u003cp\u003eThe porphyrin ring absorbs specific wavelengths of light (red and blue) and transfers that energy with high efficiency. The magnesium centre is essential to this function. Remove the magnesium or change the ring structure slightly, and the molecule stops working. Structure and function are inseparable.\u003c\/p\u003e\n\n\u003ch3 style=\"margin-top:1.75em;\"\u003eWhat size, material, and chain come with this?\u003c\/h3\u003e\n\u003cp\u003e45 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 there a gold version of chlorophyll?\u003c\/h3\u003e\n\u003cp\u003eCurrently no. Chlorophyll is available in sterling silver at 45 mm. If a gold vermeil version becomes available, we will announce it. Many plant biologists layer this with other molecules or pair it with related pieces like caffeine or glucose.\u003c\/p\u003e\n\n\u003c\/section\u003e","brand":"sciencejewelry1824","offers":[{"title":"Default Title","offer_id":31949989871679,"sku":"NK0062-S","price":145.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1411\/4806\/files\/203_chlorophyll_silver.png?v=1699507655"},{"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":200.0,"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"}],"url":"https:\/\/sciencejewelry1824.shop\/collections\/the-longest-day.oembed","provider":"sciencejewelry1824","version":"1.0","type":"link"}