ScienceJohn Michels (Journalist) 1954 |
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Стр. 142
... growth where a steady increase in C13 concentration is observed ; this is the period of most rapid growth , and it is an interesting question whether a growth effect or a real atmospheric effect operated at this point . The problem is ...
... growth where a steady increase in C13 concentration is observed ; this is the period of most rapid growth , and it is an interesting question whether a growth effect or a real atmospheric effect operated at this point . The problem is ...
Стр. 217
... growth regulating properties . The relative activity of the B - naphthylalanines as possible growth regulators was determined by em- ploying a biological test . Alamercery ( 1 ) has demon- strated that cucumber seeds during germination ...
... growth regulating properties . The relative activity of the B - naphthylalanines as possible growth regulators was determined by em- ploying a biological test . Alamercery ( 1 ) has demon- strated that cucumber seeds during germination ...
Стр. 397
... growth to diameter ; ( b ) sparse foliage ; ( c ) relatively smooth and thin bark ; ( d ) gnarled or spiral growth in some species ; ( e ) centuries - long longitudinal retreat of the cambium- edge from the leaders ( here called ...
... growth to diameter ; ( b ) sparse foliage ; ( c ) relatively smooth and thin bark ; ( d ) gnarled or spiral growth in some species ; ( e ) centuries - long longitudinal retreat of the cambium- edge from the leaders ( here called ...
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AAAS acid activity Agriculture alloxan American animals Association Atomic Energy awarded Biochemistry biological Bureau California Cancer carbon cells Center chairman Chem chemical chemistry College Committee concentration Conference cortisone Department Dept director discussion dose effect electron engineering enzyme experimental experiments fellowships field Foundation gamma rays Geological graphite Harvard Health Illus industrial Institute interest investigation irradiation isatin isotopic Laboratory material measurements Medical meeting ment metacinnabar method mice National neutron nitrogen nuclear nucleic acid observed obtained organization papers percent phototube physics Piltdown plants present president problems produced professor protein radiation radio radioactive rats reactor received recent reported sample saponin School of Medicine Science scientific scientists Section sessions Society solar solution specific sulfaguanidine symposium Table temperature thorium tion tissue triple response triuret U.S. Geological Survey Univ University uranium versity virus Washington WBNS x-ray York zirconium