1258 



RADIATION BIOLOGY 



Repeated X irradiation of lymph nodes, 



1104 

 Reproduction, convariant, 352 



in mammals, effect of radiation on, 

 826-831 

 Reproductive system, effects of prenatal 

 irradiation on, 889-890, 896-898, 

 909, 912 

 Resonance, 16, 46 

 Resonance effect, neutron collisions, 114 



nuclear, 58 

 Resonance radiation, 199, 202, 206, 216 

 Resonance rule in collisions, 205, 207, 



208, 220, 235, 237-238 

 Resonating current, 17, 20 

 Resorption, of bone, 1110 



of embryos after irradiation, 864, 866, 

 873 

 (See also Mortality, prenatal) 

 Respiration, endogenous, 302 

 of intestinal tissue, 984 

 single cells, 300 

 Restitution, average time for, 728 



of chromosome breaks, 363, 483, 499, 



500, 722 

 oxygen effect on, 749 

 proportion of breaks undergoing, 731 

 space factor in, 730 

 Retardation, of breathing, 940 



of growth, 339, 340, 869, 876-877, 879, 

 896, 900, 905, 912, 922 

 Reticular cells, 930, 1135 

 bone marrow, 1099 

 lymphatic organs, 1101, 1103 

 radioresistance of, 1133, 1135 



bone marrow, 1100 

 spleen, 1106 

 thymus, 1104 

 Reticuloendothelial system, 926, 1004- 



1005 

 Reticulocytes, effect on, of fast neutrons, 

 1043, 1048 

 of gamma radiation, 1055 

 of spleen shielding, 1078 

 and splenectomy, 1078 

 of X radiation in phenylhydrazine- 

 induced anemia, 1036 

 Retina, 306, 339 



damage to, following prenatal irradia- 

 tion, 880, 889, 891, 897-898, 909, 

 912 

 degeneration in, 338 

 Reunion of chromosome breaks, 722 

 oxygen effect on, 749 

 space factor in, 730 

 Reversible degenerative phenomena, 1092 

 Rhodanase, 987 



Rili abnormalities following prenatal 



irradiation, 882, 884, 887, 892, 904 

 Ribonuclease, 299 



inactivation of, 944 

 Ribonucleic acids, 289, 305, 929 



synthesis of, 962 

 Rodents, 686, 687 

 Roentgen rays, 3 

 Roentgen units, 120, 319 



definition of, 149 

 Root-mean-square deviation, 80 

 Roots, pea, 341 



sunflower, 340 



tomato, 341 



Vicia faba, 322, 325, 340, 341 



wheat, 339 

 Rotifers, 583 

 Ruminants, 444 



Rutherford scattering, 41, 43, 44, 51 

 Rutin, 968, 969, 979 



S 



Salamander, 335, 554, 776, 811, 816 

 Salivary-gland chromosomes in animal 

 cells, 635-637, 646, 648-652, 660, 

 661, 663-665, 668-670, 673, 677-679, 

 689 

 Salivary-gland secretion, 1127 

 Salivation, excessive, 995 

 Salmon, 448, 628, 629 

 Saltants, 593 

 Sarcoma, Jensen, 305 



rat, 693 

 Saturation effect, 140 

 Scatterer recoil, 43 

 Scattering, a-particle, 42 



coherent, 104 



Compton, 37, 38, 44 



angular distribution of, 39 

 distribution of energy, 38 



of electromagnetic radiation, 37, 45-48 



probability of, 39 



Rutherford, 41, 43, 44, 51 

 Schwann cells, 996 

 Sciara, 484, 689, 690 

 Scilla, 776, 799, 804 

 Scintillation counters, 233 

 Scintillations, 4 

 Sclerosis in skin, 1122 

 Sea urchins (Arbacia), 554, 766, 769, 771, 

 772, 784, 785, 789, 796, 803, 812, 814 



sperm, 300, 301, 304 

 Sea water, 576 

 Sebaceous glands, 1119, 1123 



carcinogenesis in, 1176 

 Secede, 363 

 Secondary radiation, 72 



