1244 



RADIATION BIOLOGY 



Hydrocarbons, carcinogenic, 422 

 Hydrocephalus following prenatal irra- 

 diation, 879-881, 883, 909 

 Hydrogen atoms, 285 

 Hydrogen bonding in protein, breaking 



of, by radiation, 250-252 

 Hydrogen chloride, 291 

 Hydrogen effect on radiation-induced 



chromosome aberrations, 746, 753 

 Hydrogen ion concentration and radio- 

 sensitivity, 939 

 Hydrogen peroxide, 256, 271, 274, 275- 

 277, 303, 306, 939 

 formation of, 285, 286, 328 

 and mutation, 547-552, 581 

 origin in irradiated water, 750 

 in relation to radiation-induced chro- 

 mosome aberrations, 751 

 Hydroperoxyl radicals, 294 

 origin in irradiated water, 751 

 in relation to radiation-induced chro- 

 mosome aberrations, 752 

 Hydrosulfite, 942, 945 

 Hydroxyapatite and bone, 1108 

 /3-Hydroxyglutamic acid, 292 

 Hydroxyl groups, 292 

 Hydroxyl radicals, 285 



origin in irradiated water, 750 

 in relation to radiation-induced chro- 

 mosome aberrations, 752jf. 

 Hydroxylation of benzene, 257 

 Hydroxyproline, 292 

 Hymenoptera, 454 

 Hyperesthesia, 996 

 Hypertension and adrenal irradiation, 



991 

 Hyperthermia, 996 



Hypopharynx, carcinogenesis in, 1172 

 Hypophysectomy, 1005 

 Hypophysis, 1132 

 anterior lobe, 1132 

 growth, 1132 

 Hypotension, 980 



Hypoxia, effect on radiation-induced 

 genetic damage, 856 

 and radiation sensitivity of embryos, 

 904-906, 913 



Immunity to radiation effects, 1002-1004 



Immunization, 935 



Implantation process, radiation effect on, 



868 

 Inactivation of viruses, 324, 329-330 

 Indirect action of radiations, 960 

 Indirect action theory of radiation, 257- 



260, 272 



Indirect effects of radiation, biological, 

 244-245, 1136 

 on chromosomes, 753, 754, 756 

 as related to radiodecomposition of 

 water, 750 

 Individual radiosensitivity, 932 

 Infections, 934, 960, 1002 



enterogenous, 982-983, 1002 

 Inflammation facilitating carcinogenesis, 



1186-1187 

 Inflammatory reaction in skin, 1121, 1122 

 Infrared effects in combination with X 



rays, 739 

 Inheritance, cytoplasmic, 595, 596 

 Intensity, duration factor, 925 



(See also Dosage rate) 

 Interference, 356 

 Internal conversion, 34, 225, 226-228, 



246-249 

 Interphase, 628, 682, 684 

 Interphase nucleus, 1096 

 Interstitial cells, 1116-1118 

 of ovary, 1117, 1118 

 of testis, 999, 1116, 1117 

 Interstitial deletions, 717 



in relation to X-ray dose, 726 

 Intestinal absorption, 986 

 Intestinal edema, 983 

 Intestines, 929, 982-983, 1006, 1124 

 acquired radioresistance of, 1127 

 duodenum, 1125 

 effect on, of, Ba 140 -La 140 , 1127 

 of fast neutrons, 1126 

 of fission products, 1127 

 of phosphorus 32 , 1127 

 of plutonium, 1127 

 of radium, 1127 

 of shielding, 1070, 1072, 1073 

 of slow neutrons, 1126 

 of sodium 24 , 1127 

 of strontium 89 , 1127 

 of yttrium 91 , 1127 

 of Zr 93 -Cb 93 , (Zr 95 -Nb 95 ), 1127 

 epithelium of, 929 

 hemorrhages, 1124 

 motility of, 985 

 small, 306, 307, 1124 

 ulceration, 1124 

 Inversion, paracentric and pericentric, 



374 

 Iodine, 414, 552 



Iodine 131 , effect of, on lymphopoiesis, 

 1057 

 on thyroid, 1132 

 toxicity of, 993 

 uptake, 992-993 

 Iodoacetate, 941, 946 

 Ion beams, 3 



