ScienceJohn Michels (Journalist) 1952 |
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Стр. 50
... increase of selection pressure always proportional to the concentration of toxic agent al- ready attained . A gradual increase in the toxicity of the environment is of relatively great significance in attainment of the penicillin ...
... increase of selection pressure always proportional to the concentration of toxic agent al- ready attained . A gradual increase in the toxicity of the environment is of relatively great significance in attainment of the penicillin ...
Стр. 102
... increase in the costs of services and equip- ment , as well as by salary increases in the postwar period . The net increase in research resources is there- fore much smaller than at first sight appears , but even so it has been ...
... increase in the costs of services and equip- ment , as well as by salary increases in the postwar period . The net increase in research resources is there- fore much smaller than at first sight appears , but even so it has been ...
Стр. 251
... increase in the vertical movement of the hori- izontal tail flukes , accompanied by a lunge forward , or sudden increase in swimming speed . This increase in speed would last for several seconds after the ter- mination of the stimulus ...
... increase in the vertical movement of the hori- izontal tail flukes , accompanied by a lunge forward , or sudden increase in swimming speed . This increase in speed would last for several seconds after the ter- mination of the stimulus ...
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AAAS acid activity American amino acid animals Annual appointed Association awarded Bentley Glass Biol biological blastocyst blood Cancer catalase cells chairman Chem Chemical Chemistry Chicago chlorophyll clinical colchicine College Committee compounds concentration Conference Congress cortisone Council culture cursor curve cytochrome Department director Division effect engineering enzyme experimental experiments Exptl field glucuronic acid glutathione growth helium hesperidin Hospital Ibid Illus indicated injection Institute insulin International investigation Laboratory Manuscript received measured Medical Medicine ment methanol method mice midden mo pregnant National normal observed obtained organic oxide paper Patient penicillin physical physiology pipettes plant polymyxin present president problems production professor protein reaction samples School Science scientific scientists Section Sept Society sodium solution specific spectra strain streptomycin Table temperature tion tissue tracking tube tuberculosis tumor tyrosinase University uraninite volume Washington York zinc