ScienceJohn Michels (Journalist) 1947 |
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Стр. 50
... placed in test tubes containing absorbent cotton on which the conical points rest . These containers are capped with unsized paper and then sterilized by dry heat , or by autoclaving followed by drying in an incubator . For testing ...
... placed in test tubes containing absorbent cotton on which the conical points rest . These containers are capped with unsized paper and then sterilized by dry heat , or by autoclaving followed by drying in an incubator . For testing ...
Стр. 312
... placed on a Kahn shaker for 30 minutes and the clumps permitted to settle . The upper portion of the liquid , containing the suspended bacteria , is pipetted into sterile tubes . The organisms from several tubes ( usually two or three ) ...
... placed on a Kahn shaker for 30 minutes and the clumps permitted to settle . The upper portion of the liquid , containing the suspended bacteria , is pipetted into sterile tubes . The organisms from several tubes ( usually two or three ) ...
Стр. 323
... placed over the fifth . Cage 1 , without a lead plate , and Cage 2 , with one lead plate , were placed on the top shelf of a metal rack on the fifth floor of a six - story concrete steel building . Cages 3 and 4 , a similar pair , were ...
... placed over the fifth . Cage 1 , without a lead plate , and Cage 2 , with one lead plate , were placed on the top shelf of a metal rack on the fifth floor of a six - story concrete steel building . Cages 3 and 4 , a similar pair , were ...
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AAAS acid activity administration American animals application appointed Association atomic awarded barbiturate biological blood cancer carbon cells cent centrioles chairman chemical chemistry Chicago chromosomes clinical College Commission Committee concentration Department director disease Division Edison effect electrical energy engineering enzyme estrone experimental experiments field Foundation glycerides grams Harlow Shapley Illustrated inactivation increase industrial injection Institute investigation isotopes Kirtley F Laboratory liver material Medical Medicine meeting ment method mice mustard gas National neutrons normal nutrition observed obtained operation organization patients penicillin period physical physiology pipette plants plutonium possible present president problems production professor protein radiation radioactive rats reactions record Roger Adams sample School Science scientific scientists Service smegma Society sodium solution specific stanine streptomycin subtilin technical temperature tests thermal neutrons thiamine tion tissue treatment tube tumors University uranium vitamin Washington York zirconium