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AAAS Acad acetylcholine acid activity American amino acids animals annual Association Atomic Energy biochemical biochemistry biological bone brain Calif cells Chem chemical chemistry Chicago chlorothiazide chlorpromazine clinical College Colorimeters Committee concentration culture Department Dept director drugs effect electric electrodes electron ence engineering enzymes equipment experimental experiments field galactose gram helium hydrocortisone hypothalamus increase industrial Institute instrument Klopsteg laboratory lysergic acid diethylamide mathematics measured Medical Medicine ment method National neutron nuclear operation optical organic papers particles percent Ph.D physical present President problems production professor radiation rats References and Notes reported reserpine response retinene rhodopsin samples School Science scientific scientists serotonin Service session Society stimulation strontium-90 superfluid symposium tektites temperature tion tissue tube United Univ University Usselo vitamin B12 volume Vriezenveen Washington York