i02 



BADIATIOX IJTOT.OOY 



Ultraviolet radiation, sliort-vi.siV)le, 3GG 

 spoctnim, 97, 98, 102, 103 

 .st(Mility, induction of, 25()-258. 277 

 stimulation by. 433 

 suppression of enzymatic .•ulai>t:it ion 



by, 441 

 translocations, induction of, 2')ti 257, 

 259-2()0, 2ti4 2()(), 2()8. 270 272 

 variations in sensitivity to, 292, 304 

 wave-length dependence for muta- 

 tions, 250, 256-258, 2(1()-2()1, 

 273-281 

 window-glass filter, 488 

 Ultraviolet scattering in tissues, 221, 



222, 231 

 Ultraviolet sources, 55-57, 86-90 

 mercury, 55 



high-pressure, 86-90 

 characteristics, 86 

 low-iiressure, 55-58 

 characteristics, 56-57 

 metals other than mercury, 88, 89 

 simlamps, characteristics, 89 

 fluorescent, mercury, 90 

 Ultraviolet survival curves (see Sur- 

 vival curves) 

 Unimolecular steps, 19 

 Unto, 321, 322 

 Ustilago zeae, 433, 434, 437 



Vacuolization, radiation-produced, 286, 



321 

 Vascular dilation, 502 



effects of histamine, 517-518 

 Vasodilation, 517 

 Viruses. 333-364 



bacteriophage, 380, 405 



active, 420 



synthesis, 400 

 bacteriophage-resistant, 402 

 composition, 333 

 foot and mouth, 340 

 inactivation, 334-345 



by deuterons. 340, 342 



by ionizing radiations, 335-343 



by P^^ 343, 345 



quantum yield of, 342, 344, 345 



rate of, 335 



by ultraviolet, 343-345 



by visible light, 345 

 inactivation dose, 335, 340 

 interference, 348, 350, 351 

 intracellular irradiation, 356-360 

 latent, 358-360 

 mutations of, 346 



Viruses, nonlethal cfTects on. 340 

 papilloma, 335, 340, 3.58 

 phage svnthesis, 400 

 phage Tl. 103 



photoreactivation of, 315, 351, 3.55 

 plant, crystals of, 349 

 ral)l)it iia))illoma, 380 

 reactivation, 335. 351-356 

 hy multiplicity, 351-356 

 reprothictive delay, 346 

 sensitive cros.s-section, 338 

 sensitive volume, 338 

 separation of properties of, 346-350 

 Tl l)acteriophage, 405 



in E. colt B/r, 403 

 titration, 334 

 tobacco mosaic, 336, 340, 344, 346, 



380 

 tobacco necrosis, 340, 395 

 tomato bushy stunt, 340 

 vaccinia, 340. 341 

 (See also Bacteriophages) 

 Viscosity, protoplasmic. efTect of radia- 

 tion on. 304, 322 

 Visible light, biochemical changes in 

 protozoa induced by, 322 

 division delay by, 297 

 modification of radiation effects by, 



294, 304. 306 

 photodynamic action, 297, 302, 315, 



317, 318, 320, 321 

 photoreactivation. 304, 306 

 virus inactivation by. 345 



w 



Wall effects. 20-22 



Water, irradiated, effect of, 295. 296 ^ 



Water vapor, transmission of, 1 15-117 



X 



X-ray survival curves in fimgi, 445 

 X rays, 335, 340-342, 355 

 absorption analvsis, 211 

 cleavage delav by, 298-302, 304, 305 

 division delay by, 297. 303 

 effect of intensity, 299, 300 

 fractionated dose, 292, 293 

 genetic effects of, on cell motility, 

 286 

 on cell permeability, 294 

 in combination with idtraviolet, 



272-273 

 in comparison with ultraviolet. 

 259-260. 262-264. 266-268. 271- 

 272 



