منابع مشابه
Bio-hydrogen: microbes have their own agenda.
The international hydrogenase community stages a meeting every 3-4 years, and this time it was held in the University of Reading. Each congress has revealed new aspects of the complex nature of hydrogenases: their structure, molecular mechanisms and biosynthesis are all yielding up their secrets. This following introduction provides background information, and the highlights of the meeting are ...
متن کاملWhere have eye been? Observers can recognise their own fixations.
We are often not explicitly aware of the location of our spatial attention, despite its influence on our perception and cognition. During a picture memory task, we asked whether people could later recognise their eye fixations in a two-alternative test. In three separate experiments, participants performed above chance when discriminating their own fixation patterns from random locations or loc...
متن کاملNociceptive primary afferents: they have a mind of their own.
Nociceptive primary afferents have three surprising properties: they are highly complex in their expression of neurotransmitters and receptors and most probably participate in autocrine and paracrine interactions; they are capable of exerting tonic and activity-dependent inhibitory control over incoming nociceptive input; they can generate signals in the form of dorsal root reflexes that are tr...
متن کاملOrganisms can be proud to have been their own designers
Ab stract: Ac cord ing to H. F. Osborn, one of the three au thors of ‘Baldwin ef fect’, adap tive evo lu tion may not re quire nei ther nat u ral se lec tion nor the in her i tance of ac quired char ac ter is tics. An adap tive evo lu tion ary change in pop u la tion with out nat u ral se lec tion means that an iden ti cal adap tive change in ge net i cally dif fer ent or gan isms of a pop u la...
متن کاملMinds of their own.
L ike a miniature Segway with eyes, a robot built from 3D printed plastic does laps around a cubicle here at Brain Corporation, having learned in a matter of minutes to avoid bumping into walls as it roams. As eyeRover scoots away, Peter O'Connor, a staff scientist at the robotics software company, steps into its route. Using a remote control unit, he briefly takes control of the foot-tall robo...
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ژورنال
عنوان ژورنال: BMJ
سال: 1999
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.318.7193.1286