1260 



RADIATION BIOLOGY 



Spectrum, 18 

 absorption, 47 

 albumin, 294 

 bands, 47 

 continuous, 47 

 line, 47 



mutational, 590, 594, 596 

 nuclei, 49 

 optical, 20 

 Sperm, fertilization power of, 301 

 formation of, 998-999 

 motility of, 455 

 restitution of breaks, 483 

 Spermatids, 828-831, 842, 1114 

 Spermatocytes, 828-830, 842, 844, 1114, 

 1116, 1133 

 radiosensitivity of, 929 

 Spermatogenesis, 829, 830, 842, 843, 854, 

 1114, 1116, 1136 

 cessation of, 1116 

 Spermatogonia, 829, 830, 837-839, 842, 

 843, 846, 847, 852, 855, 1114, 1116, 

 1133 

 radiosensitivity of, 929, 999 

 Spermatozoa, 826, 828, 830-832, 834, 

 835, 837, 839, 842-844, 846-848, 855, 

 856 

 Spermia, 1114 



Sphaerocarpus, 476, 531, 540, 553 

 Spiderwort, 484 

 Spin-conservation rule in collisions, 205, 



208, 220 

 Spindle, mitotic, destruction of, ultra- 

 violet-induced, 814, 815 

 suppression of, X-ray-induced, 804 

 Spleen, 306, 919, 926, 960-966, 979, 982, 

 1106 

 ectopic erythropoiesis, 963 

 ectopic myelopoiesis, 1106 

 effect on, of clamping off circulation 

 in shielding-irradiation procedure, 



1077, 1078 



of cutting distal vessel in shielding- 

 irradiation procedure, 1069, 1070, 

 1076 

 of transplants, 963, 965 

 effect of increments to, on survival, 



1078, 1079 

 erythropoiesis, 1107, 1108 

 germinal centers, 1106 

 hemocytoblasts, 1107 

 heterophil leukocytes, 1106 

 homogenates, 926, 963, 965 

 lymphatic tissue, 1106 

 lymphocytes, 1106 

 lymphopoiesis, 1106 



mast cells in, 1107 

 megakaryocytes, 1106, 1108 



Spleen, myelocytes, 1106 

 radiation effect on, 919 

 Ba 140 -La 140 , 1107 

 fast neutrons, 1 107 

 gamma rays, 1107 

 plutonium, 1107 

 radioactive isotopes, 1107 

 radium, 1107 

 slow neutrons, 1107 

 sodium 24 , 1107 

 strontium 89 , 1107 

 yttrium 91 , 1107 

 Zr 93 -Cb 93 (Zr 95 -Nb 95 ), 1107 

 radiation exposure, 982 



prenatal, sensitivity to, 880, 897-898 

 red pulp, 1106, 1108 

 regeneration of, 1106 

 retention of colloids, 979 

 reticular cells, 1106 

 sarcoma of, 1155, 1156 

 white pulp, 1106 



(See also Spleen shielding; Spleen 

 transplants) 

 Spleen shielding, 926, 963, 965, 1068-1073 

 comparison of, with head shielding, 

 1073 

 with intestine shielding, 1072 

 with limb shielding, 1073 

 with liver shielding, 1072 

 effect of, on peripheral blood, 1069- 

 1070 

 on survival of mice, 1068 

 and cysteine, 1079 



plus estrogen, 1079, 1080 

 and estrogen, 1079 

 hematopoietic recovery, 1069-1076 

 splenectomy effects after, 1077-1081 

 on antibody formation, 1080, 1081 

 before radiation and with spleen 



transplants, 1073-1074 

 on survival of mice, 1073, 1074, 1077, 

 1081 

 Spleen transplants, 926 



modification of radiation injury by, 



1074-1075 

 quantity of transplanted tissue on 

 survival, 1076 

 Splenic suspensions, 1074 

 Staphylococcus (Micrococcus aureus), 537, 



545, 548-552, 562 

 Stationary states, 29-30 



within a molecule or crystal, 32 

 oscillatory or rotary, 32 

 Stem cells in testis, 1117 

 Sterility, 826-831, 840-843, 854, 855 

 following prenatal irradiation, 897-898 

 (See also Reproductive system, effects 

 of prenatal irradiation on) 



