منابع مشابه
Orientation by Opposed Beams of Light
Computations of the effective angular inclination (H) of the photoreceptive surfaces of the two sides, based upon measurements of orientation angles under the action of beams of light directly opposed or crossing at right angles, show that with larvae of Calliphora and of Lucillia H declines as the total illumination decreases (i.e., as the angle of orientation away from the more intense light ...
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BACKGROUND The moral status of the human embryo is particularly controversial in the United States, where one debate has centered on embryos created in excess at in vitro fertilization (IVF) clinics. Little has been known about the disposal of these embryos. METHODS We mailed anonymous, self-administered questionnaires to directors of 341 American IVF clinics. RESULTS 217 of 341 clinics (64...
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OBJECTIVE To evaluate the awareness and response of fertility clinics in the UK to the National Institute for Health and Care Excellence (NICE) guideline recommendation that intrauterine insemination (IUI) should not be offered routinely, in order to report on current practice in the UK. DESIGN Online questionnaire survey of fertility clinics in the UK regarding their current clinical practic...
متن کاملHemispheric specialization for speech opposed, by contralateral noise
Twentv riaht-handed Ss listened to a dichotic tape in which one of six consonant-vowel syllables was paired with a burst of white noise on each trial. Eight blocks of 40 trials were presented. with the syllables within a block presented to the same ear. On each trial. Ss decided if /ba/ was presented. Mean RT to right-ear items was 440.0 msec. while mean left-ear RT was 453.6 msec. Responses in...
متن کاملT H E Orientation of Animals by Opposed Beams
To investigate the ffiechanism whereby central nervous organs function as adjustors in the control of behavior, there are at least two methods of approach at present very little utilized. Something may be gained by the measurement of suitable phenomena presumed to be direct manifestations of central nervous activity, such as states of tonic immobility (Crozier, 1923-24, a, 1924, a, b, 1924-25; ...
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ژورنال
عنوان ژورنال: Nature
سال: 1987
ISSN: 0028-0836,1476-4687
DOI: 10.1038/327092b0