SUBJECT INDEX 



Abdomen, shielding of, 1072 

 Aberrations, chromatid, 715 



chromosome (see Chromosome aberra- 

 tions) 

 diagrams of types, 716, 718 

 distribution in nuclei, 720 

 effects of modifying factors on, 736jf. 

 efficiencies of radiations in producing, 



732 

 induced by absorbed radioisotopes, 733 

 induced by slow neutrons, 733 

 one-hit, 723 

 radiation-induced, in chromosomes of 



Tradescantia, 715-720 

 relation of yield, to dose, 723 



to intensity, 727 

 spontaneous vs. induced, 720 

 two-hit, 723 

 Abnormal bleeding, 966-969 

 Abnormal mitosis, 628-630, 632, 646, 647, 



664, 1092 

 Abnormalities, chromosome, induced, 

 627, 628 

 in tumors, 338 



(See also Chromosome aberrations; 

 Morphological changes follow- 

 ing irradiation; Mutations) 

 following prenatal irradiation, 879-912 

 critical periods for induction of, 

 880-887, 891-893, 901, 902, 904, 

 906, 909, 912, 913 

 Abortion following irradiation of embryo, 



866, 910-911 

 Absorption, of electromagnetic radiation, 

 17, 20, 45-48 

 energy (see Energy absorption) 

 fat, 986 



glucose, 307, 986 

 from intestine, 986 

 linear energy, 316 

 X rays, 49 



broad-beam, 108 

 narrow-beam, 107, 108 

 Absorption coefficient, /3-ray, 102 

 light, 118 

 linear, 104 



Absorption coefficient, mass, 104 



narrow-beam, 106 



neutrons, 114 



X rays, 103 



true (adjusted), 110 

 Absorption spectrum, 47 



albumin, 294 

 Accelerated atomic nuclei, 316-318 

 Accelerator, electrostatic, 11 



induction (betatron), 12 



linear, 12 

 Accidents, radiation, 998, 1005, 1006 

 Acenaphthene, 577 

 Acetic acid, 576 



Acetylcholine synthesis by brain, 996 

 Acetylene polymerization, 291 

 Acid-base balance, 974 

 Acquired radioresistance, 1136 



of intestine, 1127 

 Acridine orange, 542 

 Acrinavin, 596 

 Activated (intermediate) complex, 220, 



222, 223»., 224 

 "Activated water," 284, 937 

 Activation energy, 35, 60, 210, 215-216 



distribution of, 60 

 Activations, 60, 129 



distribution of, 135-136 



ionizing, 129 



mechanism of, 62 



and mutation, 490 



by secondary electrons, distribution of, 

 80 



spatial distribution of, 76 

 Acute radiation (see Radiation ; X radia- 

 tion) 

 Acute-radiation reaction, 980 

 Acute-radiation syndrome, 1005-1008 

 Adaptation syndrome, 989-990 

 Additivity, different radiations, 924 



radiobiological, 326 

 Adenosine triphosphate, 289, 987 

 Adenosinetriphosphatase (myosin), 298, 



922 

 Adenylic acid, 289 

 Adipose tissue, 1097 



Adrenal cortex, atrophy of, following pre- 

 natal irradiation, 889 



1229 



