Brain mechanisms and vision; subcortical systems     

D J Ingle  G F Schneider 《Science (New York, N.Y.)》1970,168(938):1493-1494

  相似文献   

Sri Lanka: an amphibian hot spot     

Meegaskumbura M  Bossuyt F  Pethiyagoda R  Manamendra-Arachchi K  Bahir M  Milinkovitch MC  Schneider CJ 《Science (New York, N.Y.)》2002,298(5592):379

  相似文献   

Sex pheromone of the queen bufferfly: electroantennogram responses     

Schneider D  Seibt U 《Science (New York, N.Y.)》1969,164(3884):1173-1174

Olfactory receptor responses (electroantennograms) were recorded from antennae of danaid butterflies. Antennae of male and female queen butterflies (Danaus gilippus berenice) respond equally strongly to the hairpencil of queen males, to its crude extract, and to one of its two identified secretory components (the ketone). Responses to the second component (the diol) are weak. Hairpencils of a related species, Lycorea ceres, which also contain the ketone, are equally effective in eliciting electroantennograms from both sexes of the queen. Antennae of another related species, the monarch (Danaus plexippus), respond to the same stimuli as does the queen. Monarch hairpencils, which lack the ketone, do not elicit electroantennograms in monarch or queen antennae.  相似文献   

Philosophical barriers to ecological ideals     

H K Schneider  W Whipple  L Marx 《Science (New York, N.Y.)》1971,171(976):1095-1096

  相似文献   

Binocular unmasking: an analog to binaural unmasking?     

B Schneider  G Moraglia  A Jepson 《Science (New York, N.Y.)》1989,243(4897):1479-1481

A visual analog to binaural unmasking was explored. The observer's task was to detect, under stereoscopic viewing conditions, an apertured sinusoidal grating added to a square patch of visual noise. In the experimental condition, the square patch of noise was presented within a frame such that the right-eye noise was a shifted version of the left-eye noise. Because of the disparity in the noise images, subjects perceived, under stereoscopic viewing conditions, that the noise patch was located behind the frame. When sinusoidal signals were added to this noise patch, the signals were clearly more detectable when the signal disparity was zero than when the signal disparity equaled that of the noise patch, demonstrating the existence of visual unmasking. Hence, under appropriate circumstances, binocular processing, in addition to providing information about depth, can also enhance the detectability of visual patterns.  相似文献   

Pheromones     

Schneider D 《Science (New York, N.Y.)》1978,200(4343):757-758

  相似文献   

Recovery from retrograde amnesia: a learning process     

A M Schneider  J Tyler  D Jinich 《Science (New York, N.Y.)》1974,184(132):87-88

Retrograde amnesia was produced in rats by electroconvulsive shock. Memory recovered if the animals were given repeated test trials. Memory did not recover if steps were taken to reduce the conditioning properties of the test trials; the manipulations included eliminating the response, altering the apparatus cues, or extinguishing conditioned "fear" by confining animals to the apparatus during the first test trial.  相似文献   

Mutation in LDL receptor: Alu-Alu recombination deletes exons encoding transmembrane and cytoplasmic domains   总被引：79，自引：0，他引：79  

M A Lehrman  W J Schneider  T C Südhof  M S Brown  J L Goldstein  D W Russell 《Science (New York, N.Y.)》1985,227(4683):140-146

The molecular size of the plasma LDL (low density lipoprotein) receptor synthesized by cultured fibroblasts from a patient with the internalization-defective form of familial hypercholesterolemia (FH 274) was smaller by 10,000 daltons than the size of the normal LDL receptor. The segment of the gene encoding the truncated portion of the FH 274 receptor was cloned into bacteriophage lambda. Comparison of the nucleotide sequences of the normal and FH 274 genes revealed a 5-kilobase deletion, which eliminated the exons encoding the membrane-spanning region and the carboxyl terminal cytoplasmic domain of the receptor. The deletion appeared to be caused by a novel intrastrand recombination between two repetitive sequences of the Alu family that were oriented in opposite directions. The truncated receptors lack membrane-spanning regions and cytoplasmic domains; they are largely secreted into the culture medium, but a small fraction remains adherent to the cell surface. The surface-adherent receptors bind LDL, but they are unable to cluster in coated pits, thus explaining the internalization-defective phenotype.  相似文献   

Coherent two-dimensional nanoscopy     

Aeschlimann M  Brixner T  Fischer A  Kramer C  Melchior P  Pfeiffer W  Schneider C  Strüber C  Tuchscherer P  Voronine DV 《Science (New York, N.Y.)》2011,333(6050):1723-1726

We introduce a spectroscopic method that determines nonlinear quantum mechanical response functions beyond the optical diffraction limit and allows direct imaging of nanoscale coherence. In established coherent two-dimensional (2D) spectroscopy, four-wave-mixing responses are measured using three ingoing waves and one outgoing wave; thus, the method is diffraction-limited in spatial resolution. In coherent 2D nanoscopy, we use four ingoing waves and detect the final state via photoemission electron microscopy, which has 50-nanometer spatial resolution. We recorded local nanospectra from a corrugated silver surface and observed subwavelength 2D line shape variations. Plasmonic phase coherence of localized excitations persisted for about 100 femtoseconds and exhibited coherent beats. The observations are best explained by a model in which coupled oscillators lead to Fano-like resonances in the hybridized dark- and bright-mode response.  相似文献   

Mammalian genes are transcribed with widely different bursting kinetics   总被引：1，自引：0，他引：1  

Suter DM  Molina N  Gatfield D  Schneider K  Schibler U  Naef F 《Science (New York, N.Y.)》2011,332(6028):472-474

  相似文献