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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