Bell violation using entangled photons without the fair-sampling assumption.

abstract：:In associative learning, the activated neurones undergo a variety of concomitant functional alterations--increases or decreases of firing activity and modifications of membrane potential or resistance and of synaptic responsiveness. Synaptic transmission which can be strengthened only when there is paired activity in ...

journal_title：Nature

authors： Baranyi A,Fehér O

更新日期：1981-04-02 00:00:00

abstract：:In mice gamma delta T-cell populations with distinct T-cell receptor (TCR) repertoires and homing properties have been identified. Diversified populations are found in lymphoid organs and intestinal epithelia. By contrast, the gamma delta T-cells that have been found in the murine skin are homogeneous. They express a ...

journal_title：Nature

authors： Itohara S,Farr AG,Lafaille JJ,Bonneville M,Takagaki Y,Haas W,Tonegawa S

更新日期：1990-02-22 00:00:00

abstract：:A 7-A resolution map of the purple membrane has been obtained by electron microscopy of tilted, unstained specimens. The protein in the membrane contains seven, closely packed, alpha-helical segments which extend roughly perpendicular to the plane of the membrane for most of its width. Lipid bilayer regions fill the s...

journal_title：Nature

authors： Henderson R,Unwin PN

更新日期：1975-09-04 00:00:00

abstract：:An Amendment to this paper has been published and can be accessed via a link at the top of the paper. ...

journal_title：Nature

authors： Schwörer S,Becker F,Feller C,Baig AH,Köber U,Henze H,Kraus JM,Xin B,Lechel A,Lipka DB,Varghese CS,Schmidt M,Rohs R,Aebersold R,Medina KL,Kestler HA,Neri F,von Maltzahn J,Tümpel S,Rudolph KL

更新日期：2019-08-01 00:00:00

abstract：:The nicotinic acetylcholine receptor (AChR) from the electroplax of the ray Torpedo californica is composed of five subunits present in a molar stoichiometry of alpha 2 beta gamma delta (refs 1-3) and contains both the binding site for the neurotransmitter and the cation gating unit (reviewed in refs 4-6). We have rec...

journal_title：Nature

authors： Noda M,Takahashi H,Tanabe T,Toyosato M,Kikyotani S,Furutani Y,Hirose T,Takashima H,Inayama S,Miyata T,Numa S

更新日期：1983-04-07 00:00:00

abstract：:The yeast nuclear protein Yra1p is an essential export factor for mRNA. Yra1p interacts directly with the mRNA transport factor Mex67p/Mtr2p, which is associated with the nuclear pore. Here, we report a genetic interaction between YRA1 and SUB2, the gene for a DEAD box helicase involved in splicing. Mutation of SUB2 a...

journal_title：Nature

authors： Strässer K,Hurt E

更新日期：2001-10-11 00:00:00

abstract：:A putative growth hormone receptor from rabbit liver and the growth hormone binding protein from rabbit serum have the same amino-terminal amino-acid sequence, indicating that the binding protein corresponds to the extracellular hormone-binding domain of the liver receptor. The complete amino-acid sequences derived fr...

journal_title：Nature

authors： Leung DW,Spencer SA,Cachianes G,Hammonds RG,Collins C,Henzel WJ,Barnard R,Waters MJ,Wood WI

更新日期：1987-12-10 00:00:00

abstract：:Stable associations of more than one species of symbiont within a single host cell or tissue are assumed to be rare in metazoans because competition for space and resources between symbionts can be detrimental to the host. In animals with multiple endosymbionts, such as mussels from deep-sea hydrothermal vents and ree...

journal_title：Nature

authors： Dubilier N,Mülders C,Ferdelman T,de Beer D,Pernthaler A,Klein M,Wagner M,Erséus C,Thiermann F,Krieger J,Giere O,Amann R

更新日期：2001-05-17 00:00:00

abstract：:The growth of plants depends on continuous function of the meristems. Shoot meristems are responsible for all the post-embryonic aerial organs, such as leaves, stems and flowers. It has been assumed that the phytohormone cytokinin has a positive role in shoot meristem function. A severe reduction in the size of merist...

journal_title：Nature

authors： Kurakawa T,Ueda N,Maekawa M,Kobayashi K,Kojima M,Nagato Y,Sakakibara H,Kyozuka J

更新日期：2007-02-08 00:00:00

abstract：:An emerging concept in the field of cancer biology is that a rare population of 'tumour stem cells' exists among the heterogeneous group of cells that constitute a tumour. This concept, best described with human leukaemia, indicates that stem cell function (whether normal or neoplastic) might be defined by a common se...

journal_title：Nature

authors： Lessard J,Sauvageau G

更新日期：2003-05-15 00:00:00

abstract：:Monocular lid suture during the sensitive period early in the life of a kitten disrupts normal development of inputs from the two eyes to the visual cortex, causing a decrease in the fraction of cortical cells responding to the deprived eye. Such an ocular dominance shift has been assumed to depend on patterned visual...

journal_title：Nature

authors： Chapman B,Jacobson MD,Reiter HO,Stryker MP

更新日期：1986-11-13 00:00:00

abstract：:The sensation of pain is carried to the central nervous system by small-diameter fibres which terminate in the superficial layers of the spinal grey matter, particularly the substantia gelatinosa. Opiate drugs administered into the substantia gelatinosa inhibit the excitation of deeper dorsal horn neurones by noxious ...

journal_title：Nature

authors： Yoshimura M,North RA

更新日期：1983-10-06 00:00:00

abstract：:Fluctuations in the counting rate of photons originating from uncorrelated point sources become, within the coherently illuminated area, slightly enhanced compared to a random sequence of classical particles. This phenomenon, known in astronomy as the Hanbury Brown-Twiss effect, is a consequence of quantum interferenc...

journal_title：Nature

authors： Kiesel H,Renz A,Hasselbach F

更新日期：2002-07-25 00:00:00

abstract：:Growth factors such as platelet-derived growth factor (PDGF) elicit the transcriptional activation of a large number of immediate early genes (many of which encode transcription factors), and ultimately DNA synthesis. Both AP1 and Myc are activated in fibroblasts in response to growth factor stimulation, and various e...

journal_title：Nature

authors： Barone MV,Courtneidge SA

更新日期：1995-11-30 00:00:00

abstract：:Transposable elements of DNA that are structurally defined and genetically discrete units seem to have an important role in the evolution of bacterial plasmids. Recombination occurring at the termini of such elements can result in the joining together of unrelated DNA segments that lack extensive nucleotide sequence h...

journal_title：Nature

authors： Cohen SN

更新日期：1976-10-28 00:00:00

abstract：:Transition-metal perovskite oxides exhibit a wide range of extraordinary but imperfectly understood phenomena. The best known examples are high-temperature superconductivity in copper oxides, and colossal magnetoresistance in manganese oxides ('manganites'). All of these materials undergo a range of order-disorder tra...

journal_title：Nature

authors： Renner Ch,Aeppli G,Kim BG,Soh YA,Cheong SW

更新日期：2002-04-04 00:00:00

abstract：:We have previously identified a structurally abnormal insulin in the serum and pancreas of a middle-aged man with diabetes mellitus which arose from a leucine for phenylalanine substitution at position 24 or 25 of the insulin B chain; further analysis of the patient's leukocyte DNA showed that one of the patient's ins...

journal_title：Nature

authors： Shoelson S,Haneda M,Blix P,Nanjo A,Sanke T,Inouye K,Steiner D,Rubenstein A,Tager H

更新日期：1983-04-07 00:00:00

abstract：:A re-analysis of published data on mouse mutation rates induced by X and gamma rays suggests that the kinetics of induction can be analysed by fitting the data to a parabolic curve. We interpret this to mean that a substantial proportion of the induced mutations results from gross chromosomal changes such as deletions...

journal_title：Nature

authors： Abrahamson S,Wolff S

更新日期：1976-12-23 00:00:00

abstract：:High-pressure transitions are thought to modify hydrogen molecules to a molecular metallic solid and finally to an atomic metal1, which is predicted to have exotic physical properties and the topology of a two-component (electron and proton) superconducting superfluid condensate2,3. Therefore, understanding such trans...

journal_title：Nature

authors： Ji C,Li B,Liu W,Smith JS,Majumdar A,Luo W,Ahuja R,Shu J,Wang J,Sinogeikin S,Meng Y,Prakapenka VB,Greenberg E,Xu R,Huang X,Yang W,Shen G,Mao WL,Mao HK

更新日期：2019-09-01 00:00:00

abstract：:The computations performed by local neural populations, such as a cortical layer, are typically inferred from anatomical connectivity and observations of neural activity. Here we describe a method-influence mapping-that uses single-neuron perturbations to directly measure how cortical neurons reshape sensory represent...

journal_title：Nature

authors： Chettih SN,Harvey CD

更新日期：2019-03-01 00:00:00

abstract：:A long-standing hypothesis on tumorigenesis is that cell division failure, generating genetically unstable tetraploid cells, facilitates the development of aneuploid malignancies. Here we test this idea by transiently blocking cytokinesis in p53-null (p53-/-) mouse mammary epithelial cells (MMECs), enabling the isolat...

journal_title：Nature

authors： Fujiwara T,Bandi M,Nitta M,Ivanova EV,Bronson RT,Pellman D

更新日期：2005-10-13 00:00:00

abstract：:T lymphocytes of the alpha/beta T-cell receptor (TCR) lineage mature in the thymus, where they undergo a series of differentiation, expansion and selection events. For normal T-cell ontogeny to occur, thymocytes must interact physically with cortical and medullary thymic stroma cells. In parallel, interactions of the ...

journal_title：Nature

authors： Holländer GA,Wang B,Nichogiannopoulou A,Platenburg PP,van Ewijk W,Burakoff SJ,Gutierrez-Ramos JC,Terhorst C

更新日期：1995-01-26 00:00:00

abstract：:Continental rifts are important sources of mantle carbon dioxide (CO2) emission into Earth's atmosphere1-3. Because deep carbon is stored for long periods in the lithospheric mantle4-6, rift CO2 flux depends on lithospheric processes that control melt and volatile transport1,3,7. The influence of compositional and thi...

journal_title：Nature

authors： Muirhead JD,Fischer TP,Oliva SJ,Laizer A,van Wijk J,Currie CA,Lee H,Judd EJ,Kazimoto E,Sano Y,Takahata N,Tiberi C,Foley SF,Dufek J,Reiss MC,Ebinger CJ

更新日期：2020-06-01 00:00:00

abstract：:Sea ice and dust flux increased greatly in the Southern Ocean during the last glacial period. Palaeorecords provide contradictory evidence about marine productivity in this region, but beyond one glacial cycle, data were sparse. Here we present continuous chemical proxy data spanning the last eight glacial cycles (740...

journal_title：Nature

authors： Wolff EW,Fischer H,Fundel F,Ruth U,Twarloh B,Littot GC,Mulvaney R,Röthlisberger R,de Angelis M,Boutron CF,Hansson M,Jonsell U,Hutterli MA,Lambert F,Kaufmann P,Stauffer B,Stocker TF,Steffensen JP,Bigler M,Siggaard-An

更新日期：2006-03-23 00:00:00

abstract：:A single base-pair mutation (beta s) in codon 6 of the human beta-globin gene, causing a single amino-acid substitution, is the cause of sickle cell anaemia. The mutant haemoglobin molecule, HbS, polymerizes when deoxygenated and causes deformation of the erythrocytes to a characteristic 'sickled' shape. Sickling of c...

journal_title：Nature

authors： Greaves DR,Fraser P,Vidal MA,Hedges MJ,Ropers D,Luzzatto L,Grosveld F

更新日期：1990-01-11 00:00:00

abstract：:The development of photolabile caged neurotransmitters has made possible the study of the split-second kinetics of receptor-ligand interactions. An instrument has now been developed for activating the neurotransmitter and measuring the neuron's response. ...

journal_title：Nature

authors： Marque JJ

更新日期：1989-02-09 00:00:00

abstract：:The central nervous system has extraordinary plasticity in early life. This is thought to involve N-methyl-D-aspartate (NMDA) receptors which, along with the non-NMDA receptors, mediate fast excitatory synaptic transmission. Although NMDA receptors may be transiently enhanced early in life, it has not been possible to...

journal_title：Nature

authors： Hestrin S

更新日期：1992-06-25 00:00:00

abstract：:There is still no universally accepted theory of high-temperature superconductivity. Most models assume that doping creates 'holes' in the valence band of an insulating, antiferromagnetic 'parent' compound, and that antiferromagnetism and high-temperature superconductivity are intimately related. If their respective e...

journal_title：Nature

authors： Bozovic I,Logvenov G,Verhoeven MA,Caputo P,Goldobin E,Geballe TH

更新日期：2003-04-24 00:00:00

abstract：:Transgenic mice bearing the cellular myc oncogene coupled to the immunoglobulin mu or kappa enhancer frequently develop a fatal lymphoma within a few months of birth. Since the tumours represent represent both immature and mature B lymphocytes, constitutive c-myc expression appears to be highly leukaemogenic at severa...

journal_title：Nature

authors： Adams JM,Harris AW,Pinkert CA,Corcoran LM,Alexander WS,Cory S,Palmiter RD,Brinster RL

更新日期：1985-12-12 00:00:00

abstract：:That animals and humans can accomplish the same goal using different effectors and different goals using the same effectors attests to the remarkable flexibility of the central nervous system. This phenomenon has been termed 'motor equivalence', an example being the writing of a name with a pencil held between the toe...

journal_title：Nature

authors： Kelso JA,Fuchs A,Lancaster R,Holroyd T,Cheyne D,Weinberg H

更新日期：1998-04-23 00:00:00