ScienceJohn Michels (Journalist) 1951 |
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Стр. 86
... evidence for active maintenance of ionic concentration gradients ( 35 ) . Neurophysiologists have usually considered that sodium plays the active role in resting nerve . Recently Hodgkin and Katz ( 36 ) have provided strong evidence ...
... evidence for active maintenance of ionic concentration gradients ( 35 ) . Neurophysiologists have usually considered that sodium plays the active role in resting nerve . Recently Hodgkin and Katz ( 36 ) have provided strong evidence ...
Стр. 240
... evidence was secured that some strains mutate and others do not . The conclusion has been reached that the yellow spots occurring only occasionally , or frequently , in green tobacco mosaic strains are usually the result of ...
... evidence was secured that some strains mutate and others do not . The conclusion has been reached that the yellow spots occurring only occasionally , or frequently , in green tobacco mosaic strains are usually the result of ...
Стр. 411
... evidence by the analysis of the Sr / Ca ratio in unaltered fossils . Since Sr / Ca in the calcareous skeleton ... evidence that the oceanic Sr / Ca ratio has been of about the same order of magnitude at least since the early Paleozoic ...
... evidence by the analysis of the Sr / Ca ratio in unaltered fossils . Since Sr / Ca in the calcareous skeleton ... evidence that the oceanic Sr / Ca ratio has been of about the same order of magnitude at least since the early Paleozoic ...
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The Potentiation of DDT against Resistant Houseflies | 6 |
Book Reviews | 21 |
AAAS Administration | 26 |
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