151 



Monoethyl phosphate 



conversion to acetylphos- 

 phate, 49 



Movement 



molecular components, 18 



Myeloid tissue 



regeneration of lymphoid 



tissue, 144 

 Myosin 



effect of irradiation, 17 

 inactivation volume, 5 



National Research Council, 144 

 Newcastle disease, 1 

 Newcastle virus 



single hit activation, 22 



Newt cells 



chromosome breaks, Ho 



New York, 1 

 Nitrogen mustard 



effect on radioresistance, 



104 



Nitrogen 



effect on nucleic acid re- 

 sponse to radiation, 127 



Nuclear acid 



changes in viscosity, 127 



degradation, 23 



effect of radiation on activity, 



126 



effect of radiation on metabo- 

 lism, 119 

 inactivation, 3 „ 

 incorporation of P , 120 

 ionic yield from indirect ef- 

 fect of radiation, 3 

 location of breaks in molecu- 

 lar chain, 132 

 metabolism of intermediates, 



122 



molecular weight, 49 

 role of purine and pyrimidine 

 in radiation effects, 122 

 role of synthesis in lysogeny, 

 121 



synthesis induced by radia- 

 tion, 128 

 Nucleoprotein 



application of radiation re- 

 sponse data to cellular re- 

 sponse, 129 



changes in viscosity, 42 

 effect of radiation, 40 

 isolation at low ionic 

 strength, 116 



Nucleotide precursors 



acid soluble pool, 67 



Nucleotide . 



leakage from mitochondria, bB 

 response to radiation, 106 

 role in enzyme synthesis, 75 



Nutrients 



availability during cell divi- 

 sion, 58 



Organ weights 



reliability for measuring ra- 

 diation response, 101 



Oxalacetate, 87 



Oxidation-reduction reactions, 30 



Oxygen 



effect on radioresistance, 69, 



104 



protection of phage, 47 

 role in biologic effects of ra- 

 diation, 30 



role in response of nucleic 

 acid to radiation, 127 



Para-aminopropiophenone (PAPP) 



protection against radiation, 



100 

 Pathologic change 



relation to biochemical 



change, 88 

 Pauling diagrams, 131 



Pentose 



formation of cytidine, 36 



Pentose moiety 



site of radiosensitivity, 130 



Pepsin 



molecular weight, 5 

 Peptide bonds 



linkage of meromyosins, 17 



Peroxide 



degradation of nucleic acid, 



128 



purity, 129 



role in response to radiation, 



47 

 Phage 



inactivation by P , 4 

 inactivation by radiation in 

 hydrogen saturated solution, 



47 



influence of temperature on 

 radiosensitivity, 133 

 protective effect of oxygen, 47 

 Phenylhydrazine 



production of anemia, 144 



