152 



Phosphoglyceraldehyde dehydro- 

 genase, 87 



radiosensitivity of SH 



groups, 31 

 Phosphorus 



importance in macromolecu- 



lar chain, 131 



metabolism in irradiated 



yeast, 60 

 Phosphorus-32 



inactivation of phage, 4 



incorporation into DNA-P 



molecules of irradiated rats, 



121 



incorporation into nucleic 



acid molecule, 120 



origin of RNA, 77 

 Photosynthesis, 43 

 Plants 



chromosome breaks in Ca- 



deficiencies, 115 

 Pneumococcus 



DNA transforming principle, 



6 

 PoUister-Mirsky procedure, 115 

 Polymerization 



induced by radiation, 34 

 Polynucleotide chains 



consequences of splitting, 



136 

 Polypeptide chain 



migration of positive charge, 



15 



random walk of electron, 15 

 Polysaccharides 



protein synthesis, 74 

 Positive charge 



migration, 10 



migration in polypeptide 



chain, 15 



time of transfer, 16 

 Potassium 



role in metabolism of 



E. coli, 60 

 Precursor 



incorporation into molecule, 



120 

 Prepartioned heat, 112 

 Proteins 



dielectric absorption in "dry" 



state, 20 



direct effect of radiation, 1 



effects of radiation, 34, 56 



relation of synthesis to DNA 



pool, 136 



role of RNA in synthesis, 73 



Protein denaturation 



analysis of stages, 9 



Augenstines' theory, 17 

 Purines 



effects of radiation on light 



absorption, 35 

 Pyrimidine ring 



UV absorption, 36 

 Pyrimidines 



effect of radiation on light 



absorption, 35 

 Pyruvate, 87 



Radiation 



attempts to remove indirect 

 effects, 23 



attempts to screen biochemi- 

 cal effects, 90 

 chromosome breaks, 110 

 differential tissue suscepti- 

 bility, 92 



direct effect on large mole- 

 cules, proteins and viruses, 1 

 effects distant from locus of 

 exposures, 109 

 effects in varying concentra- 

 tions of solutions, 49 

 effects of P^^ pattern in 

 adenylic, cytidylic, guanylic, 

 and uredylic acids, 66 

 effect of single vs. fractionat- 

 ed dose on thymic weight, 81 

 effects on activity of nucleic 

 acids, 126 



effects on aqueous solutions, 

 30 



effects on ATP, cytochrome 

 oxidase, malic dehydrogenase, 

 and succinic dehydrogenase, 

 96 



effects on carbohydrate me- 

 tabolism, 88 



effects on cell division, 56 

 effects on chromosomes con- 

 trasted with UV, 113 

 effects on DNA synthesis, 69 

 effects on DNA synthesis in 

 relation to thymic involution, 

 94, 99 



effects on "dried" proteins, 23 

 effects on enzymes in vivo, 86 

 effects on extent of ionization 

 and ionic yields, 31 

 effects on 5-adenylic acid in 

 spleen, 100 



