SUBJECT INDEX 



1245 



Ion density, 315, 920, 923 

 Ion pairs, definition of, 5 



per cluster, 81 

 Ionic yield, 259n. 



of dry substances, 272 

 of small and macromolecules, 272 

 and solute concentration, 268 

 Ionization, 32, 234-244 

 biological effect, 920 

 and chromosome breakage, 480-488 



number required, 488-492 

 in condensed systems, 241-243 

 definition of, 5 

 density of, 197, 243-244, 248 

 dissociation following, 225, 235, 238- 



239 

 and gross chromosomal rearrange- 

 ments, 480-488 

 mean energy per ion pair, 65, 66, 158, 



165, 166, 237, 241, 251 

 measurement of, 5 

 multiple, 196, 243 

 and point mutation, 475-479 

 recombination of, 194n., 239-240 

 spatial distribution of, 194, 197 

 specific (see Specific ionization) 

 by X-ray beam, 113 

 yield, 65 

 Ionization chambers, 6 



air wall or thimble, 154, 157-161 

 calibration in roentgens, 177-179 

 correction factors, 155, 156 

 extrapolation, 176, 182 

 standard air, 151-154, 179 

 Ionization potential, 28, 29 

 Ionizing radiations (see Radiation) 

 Ions, charge of, 67-68 



columnar distribution of, 83 

 hydration of, 232, 242-243, 247, 250- 



251 

 negative, 80 



formation of, 69 

 positive, 7 



sources of, 10 

 recombination, 68 

 spatial distribution of, 194, 197 

 Iron, 574 



uptake by bone marrow, 962 

 Iron 59 uptake by rat erythrocytes, 1037 

 Iron pigment, 1096 

 Iron porphyrin, 287 



Irradiation (see Alpha irradiation; Beta 

 irradiation ; Gamma radiation ; Radi- 

 tion; X radiation) 

 Ischemia, 939, 945 

 Isochromatid breaks, 632, 660, 717 

 relation of, to radiation dose, 724 

 to radiation intensity, 727 



Isotopes, 27 



radioactive (see Radioactive isotopes) 



Japanese bomb casualties, 996, 998, 999, 

 1005 

 (See also Hiroshima) 

 Jaw abnormalities following prenatal 

 irradiation, 880-881, 892 



Karyorrhexis, 1097 

 Ketones, 417 



17-Ketosteroids, excretion, 990 

 Kidney, 306, 1128 



carcinogenesis in, 1154, 1155, 1161 



chick, damage to, 989 



failure of, 925 



radiation effects, 982, 988-989 

 and shielding, 1070, 1072, 1073 

 Knock-on collisions, 51, 56, 63 

 Kynurenic acid excretion, 988 



Lactate, 305 



Lactation suppression in mammary gland, 



1123 

 Lactic acid formation, 305 

 Larynx, carcinogenesis in, 1151, 1180 

 Latent period, 922, 1136 



in adrenal, 1132 



in epidermis, 1119 



in eye, 1131 

 lens, 1136 



in lung, 1129 



in lymphatic tissue, 1104 



of protein denaturation, 294 



in skin, 1121 

 Lead, 574 



Lens, cysteine protection, 943 

 Lethal action, acute, 336 

 Lethal dose (LD 5 o), at birth, following 

 prenatal irradiation, 875, 912 



for mammals, 930 



(See also specific animals) 

 Lethal effects, cell (see Viability effects, 



cell) 

 Lethal mutations (see Mutations) 

 Leukemia, 1153, 1154, 1162-1167, 1170, 

 1191 



induction of (see Leukemogenesis) 



lymphoid, 1164, 1165 



myeloid, 1162, 1163, 1165, 1166, 1184 



among physicians, 1162, 1163, 1165 



in radium workers, 1162 



