منابع مشابه
Mountain excitement
theory? What is its legacy today in biology? Quite a few mathematical fads have burst onto the popular press, promising great new insights into biology: information theory, catastrophe theory, chaos theory, and most recently complexity theory, to name just a few. All were quite useful in their founding fields (except complexity, which has proven slippery to even define), but all failed to live ...
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on the shelves of any evolutionary biologist or student of the subject and you are likely to see a textbook by Mark Ridley. But Ridley, formerly at Emory University in Atlanta, and now in Oxford, has had another book in his mind for quite some time. He believes there are some ideas sparked by the Austrian monk, Gregor Mendel, that are of broader interest and has set out to explore some of them ...
متن کاملMaxwell’s Demon
This problem is prob. 2 of [1]. One of the earliest conceptual “supercomputers” was Maxwell’s Demon [2], who uses intelligence in sorting molecules to appear to evade the Second Law of Thermodynamics. To place the demon in a computational context, consider a computer “memory” that consists of a set of boxes (bits), each of volume V and each containing a single molecule. A (re)movable partition ...
متن کاملGABA Generates Excitement
In the CNS, gamma-aminobutyric acid (GABA) acts as an inhibitory transmitter via ligand-gated GABA(A) receptor channels and G protein-coupled GABA(B) receptors. Both of these receptor types mediate inhibitory postsynaptic transmission throughout the nervous system. For GABA(A) receptors, this inhibitory action is associated with a hyperpolarization due to an increase in conductance to chloride ...
متن کاملRetrograde Signaling Causes Excitement
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ژورنال
عنوان ژورنال: Nature
سال: 1982
ISSN: 0028-0836,1476-4687
DOI: 10.1038/296305a0