1236 



RADIATION BIOLOGY 



Chromosomes, euchromatic region in, 

 645, 663, 664, 677, 678, 681 

 extended, 447 

 fragmented, 1096 

 heterochromatic regions in, 635, 636, 



645, 651, 652, 663-665, 677-681 

 homologous, 370 



indirect radiation effects, 753, 754, 756 

 intranuclear disorientation, X-ray-in- 

 duced, 804 

 inversion in, 374 

 iso-, 363 

 metastable, 571 

 minute structural changes in, by 



ionizing radiation, 492-496 

 monocentric, 370 

 radiation effects in Tradescantia, 713- 



761 

 "shift" rearrangement in, 376 

 sticky (see Chromosome stickiness) 

 structural changes, 362 

 telomeres, 366, 446 

 terminal deficiency, 366 

 time of division, 721 

 translocation, 999 

 union of fragments, 446 

 variations in radiosensitivity, 721 

 X, 377, 378, 396, 407, 497, 498, 500, 

 514, 641, 644-648, 650, 654, 661, 

 663-668, 677, 678, 680, 682, 839, 

 842 

 Y, 455, 514, 641, 644, 645, 649, 651, 



654, 663, 668, 674, 842 

 (See also Chromosome aberrations; 

 Chromosome breaks) 

 Chronic-radiation effects (see Anemia; 



Erythrocytes) 

 Chylomicron count, 975 

 Ciliary motion, 1095 

 Circulation, radiation effects, 960, 976- 

 982 

 and radiosensitivity, 940 

 Citrate, and bone, 1108 



in liver, 988 

 Cleavage, irradiation during, 868 

 multipolar, X-ray induced, 803 

 retarded, following irradiation of early 

 mouse embryo, 866 

 Cleavage furrow, ultraviolet-induced 



change in position, 815, 816 

 Cleavage time, 304 



Clinical literature on prenatal irradia- 

 tion, 908-911, 913 

 Clot retraction, effect of irradiation on, 



1044 

 Clotting time, effect of irradiation on, 



1047 

 Cloud chamber, 4 



Cluster, 80 



Coat color, mammalian, 461 

 Cobalt, 946 



Cobalt-induced polycythemia, effect on, 

 of phosphorus 32 , 1065 

 and X radiation, 1067 

 of X radiation, 1067 

 erythropoiesis in, 1065 

 Cocarcinonogenesis factors, 1186-1188 

 Cohesive forces, 31 

 Colchicine, 577, 578 



effect on radiation-induced chromo- 

 some aberrations, 737 

 Cold environment, 935 

 Collagen changes, 1175 

 Collisions, average energy dissipated, 55 

 cooperative action, 138 

 distance, 77 



law of probability, 79-80 

 elastic, 42, 45, 49, 50 

 charged particles, 42 

 energy dissipation by, 67 

 neutrons, 74 

 fast, 50 



of first kind, 200 

 glancing, 51, 56, 62 



characteristics of, 63 

 inelastic, 49, 62 



energy dissipation by, 51 

 mechanism of, 50 

 probability of, 55 

 interval, 136 

 knock-on, 51, 56, 63 

 neutralizing one another, 140 

 radiative, 42, 49, 50, 63, 95 

 relative frequency, 55-56 

 resonance rule in, 205, 207, 208, 220, 



235, 237-238 

 of second kind, 200, 202-208, 219-220, 



228-229, 237-238 

 slow, 50 



spin-conservation in, 205, 208, 220 

 Colloid retention, 978 

 Coloboma following prenatal irradiation, 



879, 883, 887, 902, 909 

 Colon, 982, 1124 



carcinoma induced by Y 91 in, 1159 

 Colony formation, inhibition of, 330-331, 



333 

 Columnar epithelium of digestive system, 



1124 

 Compound (heterozygote), 404 

 Compound nucleus, 58 

 Compton effect, 38, 69 

 Compton scattering (see Scattering) 

 Conjunctiva, 1131 



radiation effects, 998 

 Con variant reproduction, 352 



