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Luca Turin

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deuterated odorant in a deuterated/normal pair, indicating a difference in odor. Furthermore, drosophila trained to avoid one deuterated odorant also avoided other deuterated odorants, chemically unrelated, indicating that the deuterated bond itself had a distinct smell. The authors identified a vibrational frequency that could be responsible and found it close to one found in nitriles. When flies trained to avoid deuterated odorants were exposed to the nitrile and its non-nitrile counterpart, the flies also avoided the nitrile, consistent with the theory that fly olfaction detects molecular vibrations.
476:, Turin et al. raise concerns about Block et al. and Block et al. respond. A recent study describes the responses of primary olfactory neurons in tissue culture to isotopes and finds that a small fraction of the population (<1%) clearly discriminates between isotopes, some even giving an all-or-or -none response to H or D isotopomers of octanal. The authors attribute this to "hypersensitivity" of some receptors to differences in hydrophobicity between normal and deuterated odorants. 485:
a special case of a more general involvement of electron currents in GPCRs. A 2019 preprint argues that the highest-resolution x-ray diffraction structure of rhodopsin, considered the ancestor of all GPCRs, contains the elements of an electronic circuit. He has also reported detection of non-equilibrium electron spins in Drosophila by their radiofrequency emissions, though this is described as a "work in progress".
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Turin filed one of the first patents for a semiconductor device made with protein. Turin's recent work focuses on the relevance of his olfaction theory to more general mechanisms of G-protein coupled receptor activation. In an article in Inference Review, he proposed that the electronic mechanism was
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in double-blind tests. The team chose musks due to the high number of carbon-hydrogen bonds available for deuteration. They replicated the earlier results of Vosshall and Keller showing that humans cannot reliably distinguish between acetophenone and its deuterated counterpart, with 8 hydrogens, and
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fruit flies can distinguish between odorants and their deuterated counterparts. Tests on drosophila differ from human experiments by using an animal subject known to have a good sense of smell and free from psychological biases that may complicate human tests. Drosophila were trained to avoid the
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and its deuterated counterpart. The study was accompanied by an editorial, which considered the work of Keller and Vosshall to be "refutation of a theory that, while provocative, has almost no credence in scientific circles." It continued, "The only reason for the authors to do the study, or for
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The vibration theory received possible support from a 2004 paper published in the journal Organic Biomolecular Chemistry by Takane and Mitchell, which shows that odor descriptions in the olfaction literature correlate more strongly with vibrational frequency than with molecular shape.
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Je leur ai expliqué la situation. J'ai dit que le devoir d'un scientifique était d'établir la vérité et que je m'étais trouvé dans un laboratoire dont le directeur agissait comme un faussaire. On m'a répondu que j'avais cinq jours pour me trouver un autre poste, de préférence hors de
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where he was a Visiting Professor. He is a Stavros Niarchos Researcher in the neurobiology division at the Biomedical Sciences Research Center Alexander Fleming in Greece. In 2021 he moved to the University of Buckingham, UK as Professor of Physiology in the Medical School.
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Block, Eric; Jang, Seogjoo; Matsunami, Hiroaki; Sekharan, Sivakumar; Dethier, Bérénice; Ertem, Mehmed Z; Gundala, Sivaji; Pan, Yi; Li, Shengju; Li, Zhen; Lodge, Stephene N; Ozbil, Mehmet; Jiang, Huihong; Penalba, Sonia F; Batista, Victor S; Zhuang, Hanyi (2015).
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writes "In PNAS, Block et al…. shift the "shape vs. vibration" debate from olfactory psychophysics to the biophysics of the ORs themselves. The authors mount a sophisticated multidisciplinary attack on the central tenets of the
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Havens, Barry R; Meloan, Clifton E (1995). "The application of deuterated sex pheromone mimics of the american cockroach (Periplaneta americana, L.), to the study of wright's vibrational theory of olfaction".
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Turin, Luca; Sotgiu, Antonello; Gaitanidis, Alexandros (10 July 2019). "Spontaneous Radiofrequency Emission from Electron Spins within Drosophila: a preliminary report on a novel biological signal".
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mechanism of the vibrational frequencies of odorants could be easily suppressed by quantum effects of nonodorant molecular vibrational modes. The authors conclude: "These and other concerns about
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diplomat and chief architect of the Palestinian refugee camps, and his mother, Adela Turin (born Mandelli), is an art historian, designer, and award-winning children's author. Turin studied
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was based on fabricated results. After Turin made a formal request that the CNRS investigate the allegations, he was told to find work outside France; Ropert was also asked to leave.
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responds "Embryonic kidney cells are not identical to the cells in the nose .. but if you are looking at receptors, it's the best system in the world." In a Letter to the Editor of
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versions of a compound should smell different due to unique vibration frequencies, despite having the same shape. A 2001 study by Haffenden et al. showed humans able to distinguish
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showed that humans only begin to detect the isotope odor of the musks beginning at 14 deuteriums, or 50% deuteration. Because Turin's proposed mechanism is a biological method of
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to publish it, is the extraordinary -- and inappropriate -- degree of publicity that the theory has received from uncritical journalists." The journal also published a review of
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in 1992 and became a member of the National Academy of Sciences in the U.S. and the French Academy of Sciences. Then in 2007, re-analysis of Korn's data by
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of these compounds in vitro. Furthermore, the mouse (methylthio)methanethiol-recognizing receptor, MOR244-3, as well as other selected human and mouse
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Brookes, Jennifer C; Hartoutsiou, Filio; Horsfield, A. P; Stoneham, A. M (2007). "Could Humans Recognize Odor by Phonon Assisted Tunneling?".
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Haffenden, L.J.W; Yaylayan, V.A; Fortin, J (2001). "Investigation of vibrational theory of olfaction with variously labelled benzaldehydes".
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In 2001 and 2004, Turin won the Prix Jasmin, the highest honor for perfume writing in France. He won the Jasmine Prize in the UK in 2009.
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Gane, Simon; Georganakis, Dimitris; Maniati, Klio; Vamvakias, Manolis; Ragoussis, Nikitas; Skoulakis, Efthimios M. C; Turin, Luca (2013).
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Takane, Shin-ya; Mitchell, John B. O (2004). "A structure–odour relationship study using EVA descriptors and hierarchical clustering".
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on 20 November 1953 into an Italian-Argentinian family, and raised in France, Italy and Switzerland. His father, Duccio Turin, was a
1141: 123: 2042: 2536: 1593: 542:(2006), which details the history and science of his theory of olfaction; an acclaimed critical guide to perfume in French, 826: 416: 297: 245: 185: 954: 505:. There, Turin and his colleague Nicole Ropert reported to their superiors that they believed some of Korn's research on 104: 54: 46: 2201: 76: 461: 35: 521: 83: 39: 257: 229: 1126:
Food Flavors: Generation, Analysis and Process Influence, Proceedings of the 8th International Flavor Conference
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at olfactory receptors, together with our extensive experimental data, argue against the plausibility of the
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Keller, Andreas; Vosshall, Leslie B (2004). "A psychophysical test of the vibration theory of olfaction".
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comments that Block used "cells in a dish rather than within whole organisms" and that "expressing an
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Turin, Luca; Skoulakis, Efthimios M. C.; Horsfield, Andrew P.; Gehrckens, Angela S. (26 May 2019).
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and writer with a long-standing interest in bioelectronics, the sense of smell, perfumery, and the
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Turin, Luca; Gane, Simon; Georganakis, Dimitris; Maniati, Klio; Skoulakis, Efthimios M. C (2015).
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and earned his PhD in 1978. He worked at the CNRS from 1982-1992, and served as lecturer in
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Hara, J (1977). "Olfactory discrimination between glycine and deuterated glycine by fish".
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does not apply to the human musk receptor OR5AN1, mouse thiol receptor MOR244-3, or other
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Block, Eric; Jang, Seogjoo; Matsunami, Hiroaki; Batista, Victor S; Zhuang, Hanyi (2015).
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Franco, Maria Isabel; Turin, Luca; Mershin, Andreas; Skoulakis, Efthimios M. C (2011).
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The Emperor of Scent: A Story of Perfume, Obsession, and the Last Mystery of the Senses
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examined. Additionally, theoretical analysis by the authors shows that the proposed
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Buss, V.; Entel, P.; Elstner, M.; Bondar, A. N.; Sugihara, M.; Okada, T. (2004).
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Since 2003, Turin has also written a regular column on perfume, "Duftnote," for
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failed to support this prediction, with human subjects unable to distinguish
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After leaving the CNRS, Turin first held a visiting research position at the
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Perfumes: The A-Z Guide - Paperback (new reviews(~450) and new Top 10 lists)
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showed serious anomalies that suggested the results were indeed fabricated.
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in 2007 suggest that Turin's proposal is viable from a physics standpoint.
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Na, Mihwa; Liu, Min Ting; Nguyen, Minh Q.; Ryan, Kevin (16 January 2019).
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In response to Turin's 2013 paper, involving deuterated and undeuterated
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contains a short biographical note and links to articles by Luca Turin.
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expression system and robustly responding to cyclopentadecanone and
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Two years later, in 2013, Turin and colleagues published a study in
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The Secret of Scent: Adventures in Perfume and the Science of Smell
283:. In 2014 he moved to the Institute of Theoretical Physics at the 2064: 453: 280: 2071: 1128:. Developments in Food Science. Vol. 37. pp. 497–524. 473: 396: 392: 391:
of the musk cyclopentadecanone, Block et al. in a 2015 paper in
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using synthetic organic chemistry, heterologous expression of
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from the article and its talk page, especially if potentially
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and the 1995 BBC Horizons documentary "A Code in the Nose."
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This Web page is parked for FREE, courtesy of GoDaddy.com.
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TED Talk video of Turin explaining the "Science of Scent"
1794:"Smells, Spanners, and Switches – Luca Turin – Inference" 1476:"Implausibility of the vibrational theory of olfaction" 1296:
Ball, Philip (2011). "Flies sniff out heavy hydrogen".
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doesn't adequately reconstitute the complex nature of
1617:"Plausibility of the vibrational theory of olfaction" 778:"Duccio Turin: Biographical note and personal memoir" 2403: 2347: 2284: 2268: 2232: 2200: 2154: 2133: 1924:"Long-held theory is in danger of losing its nerve" 351:In 2011, Turin and colleagues published a paper in 181: 173: 145: 138: 1917: 1915: 554:(2011). He is also the subject of the 2002 book 1680:Proceedings of the National Academy of Sciences 1621:Proceedings of the National Academy of Sciences 1539:Proceedings of the National Academy of Sciences 1480:Proceedings of the National Academy of Sciences 1329:Proceedings of the National Academy of Sciences 407:(which has 30 hydrogens), fails to distinguish 747:Perfumes: The A-Z Guide - Paperback (reissued) 256:, where he became a lecturer in biophysics at 2111: 1594:"Receptor Research Reignites A Smelly Debate" 1535:"Laying a controversial smell theory to rest" 874: 872: 671:The Little Book of Perfumes: The 100 classics 236:at University College London from 1992-2000. 8: 493:In 1988, Turin began work at the lab led by 840: 838: 2118: 2104: 2096: 1994:de Pracontal, Michel (27 September 2007). 1971:de Pracontal, Michel (27 September 2007). 1798:Inference: International Review of Science 1321:"Molecular vibration-sensing component in 378:inelastic electron tunnelling spectroscopy 135: 53:about living persons that is unsourced or 2319:Research Institute of Fragrance Materials 1979:(in French). No. 2238. p. 110. 1947: 1903: 1843: 1750: 1709: 1699: 1650: 1640: 1568: 1558: 1509: 1499: 1420: 1410: 1358: 1348: 1213: 1107: 1066: 793: 728:Perfumes: Parfums Le guide 1994 (english) 315:However, experimental tests published in 124:Learn how and when to remove this message 2002:(in French). No. 2238. p. 108. 1468: 1466: 264:of start-up company Flexitral, based in 2446:Sensient Flavors & Fragrances Group 1380: 1378: 769: 367:showing that humans easily distinguish 2431:International Flavors & Fragrances 298:Turin's vibration theory of olfaction 279:using natural receptors, financed by 275:, working on a project to develop an 7: 2484: 709:Perfumes: The Guide 2018 - Paperback 2304:International Fragrance Association 745:Turin, Luca; Tania Sanchez (2019). 707:Turin, Luca; Tania Sanchez (2018). 669:Turin, Luca; Tania Sanchez (2011). 650:Turin, Luca; Tania Sanchez (2009). 631:Turin, Luca; Tania Sanchez (2008). 851:. New York: Random House. p.  14: 512:Korn was awarded the prestigious 2493: 2483: 2474: 2473: 926:Institute of Theoretical Physics 538:Turin is the author of the book 20: 1598:Chemical & Engineering News 633:Perfumes: The Guide - Hardcover 435:." In commenting on this work, 2074:, his blog in January 2006. - 941:"Stavros Niarchos Researchers" 489:Role in the case of Henri Korn 1: 2025:Turin, Luca; Sanchez, Tania. 1232:10.1103/PhysRevLett.98.038101 1134:10.1016/S0167-4501(06)80176-7 994:10.1016/S0308-8146(00)00287-9 417:vibration theory of olfaction 312:from its deuterated version. 292:Vibration theory of olfaction 260:. In 2001 Turin was hired as 246:National Institutes of Health 196:(born 20 November 1953) is a 186:Vibration theory of olfaction 2070:Luca Turin stopped updating 1752:10.1021/acschemneuro.8b00416 1412:10.1371/journal.pone.0055780 795:10.1016/0197-3975(78)90029-2 462:human embryonic kidney cells 304:effect: that the normal and 271:In 2010, Turin was based at 31:biography of a living person 2324:Théâtre-MusĂ©e des Capucines 1792:Turin, Luca (19 May 2016). 1533:Vosshall, Leslie B (2015). 552:The Little Book of Perfumes 58:must be removed immediately 2558: 1092:"The Emperor's new theory" 1090:Gilbert, Avery N. (2003). 1051:"Testing a radical theory" 899:"Welcome to flexitral.com" 822:artandolfactionawards.com 593:Parfums. Le guide (french) 531: 522:Journal of Neurophysiology 2469: 2063:The official website for 1739:ACS Chemical Neuroscience 258:University College London 230:University College London 2329:The Fragrance Foundation 208:Early life and education 2298:Fragrances of the World 2065:Perfumes: The A-Z Guide 2028:Folio Columns 2003-2014 1922:Butler, Declan (2007). 1701:10.1073/pnas.1508443112 1642:10.1073/pnas.1508035112 1560:10.1073/pnas.1507103112 1501:10.1073/pnas.1503054112 1350:10.1073/pnas.1012293108 1323:Drosophila melanogaster 1202:Physical Review Letters 845:Burr, Chandler (2002). 690:Folio Columns 2003-2014 548:Perfumes: The A-Z Guide 514:Richard Lounsbery Award 342:Physical Review Letters 480:Biological electronics 395:report that the human 296:A major prediction of 252:before moving back to 45:Please help by adding 2537:Italian biophysicists 2041:perfumestheguide.com 2000:Le Nouvel Observateur 1977:Le Nouvel Observateur 1810:10.37282/991819.16.12 782:Habitat International 371:-purified deuterated 2250:Fragrance extraction 1306:10.1038/news.2011.39 888:, MIT, 23 April 2010 880:The science of smell 726:Turin, Luca (2019). 688:Turin, Luca (2015). 610:Turin, Luca (2006). 591:Turin, Luca (1992). 571:Neue ZĂĽrcher Zeitung 556:The Emperor of Scent 338:The Emperor of Scent 51:Contentious material 2380:Johann Maria Farina 2014:NZZ-Folio, Duftnote 1940:2007Natur.449..124B 1877:10.2210/pdb1u19/pdb 1692:2015PNAS..112E3155B 1633:2015PNAS..112E3154T 1551:2015PNAS..112.6525V 1492:2015PNAS..112E2766B 1403:2013PLoSO...855780G 1341:2011PNAS..108.3797F 1224:2007PhRvL..98c8101B 1096:Nature Neuroscience 1055:Nature Neuroscience 1009:Nature Neuroscience 788:(1–2): 3–18. 1978. 540:The Secret of Scent 534:Perfumes: The Guide 446:olfactory receptors 421:olfactory receptors 413:olfactory receptors 334:Nature Neuroscience 317:Nature Neuroscience 2214:Herbal distillates 2048:2016-01-26 at the 1171:10.1007/BF01946534 1109:10.1038/nn0403-335 1068:10.1038/nn0404-315 961:on 7 December 2015 829:2016-02-07 at the 749:. PerfĂĽĂĽmista OĂś. 730:. PerfĂĽĂĽmista OĂś. 711:. PerfĂĽĂĽmista OĂś. 616:. New York: Ecco. 458:olfactory receptor 401:olfactory receptor 369:gas-chromatography 228:and Biophysics at 212:Turin was born in 2507: 2506: 2395:Edmond Roudnitska 1934:(7159): 124–125. 1592:Everts S (2015). 1269:(22): 3250–3255. 1263:Org. Biomol. Chem 862:978-0-375-50797-7 673:. Profile Books. 661:978-0-143-11501-4 642:978-0-670-01865-9 623:978-0-06-113383-1 602:978-2-86665-163-3 577:Awards and honors 544:Parfums: Le Guide 507:neurotransmitters 503:Pasteur Institute 452:of smell." 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