SUBJECT INDEX 



591 



Ultraviolet potentiation, bj' cyanide, 

 442 

 by dinitrophenol, 442 

 by nitrogen mustard, 442 

 Ultraviolet radiation, absorption, 251, 



253, 258, 273-274 

 amino acids, 184, 185 

 anthocyanin pigments, 193, 194 

 ascorbic acid [see vitamin C, below) 

 carotenoids, 188, 189 

 catechins, 194-195 

 by cells, 250, 253, 273-274 

 by chitin, 252-253 

 coefficient of, 104 

 coenzymes I and II, 191, 192 

 cross section, 179 

 cytosine, 181 



desoxyriljonucleotides, 187 

 dichroism, 172, 173, 177, 183, 230 

 "end", 171 

 b.y extranuclear components, 251, 



"253 

 "fairly clear" air, 105 

 flavins, 190-191 

 flavone pigments, 193, 194 

 "forbidden" transition, 170 

 Franck-Condon principle, 170 

 intracellular localization by, 219- 



224 

 Kundt's rule, 180 

 molecular orbital, 173-177 

 nucleolus, 221, 234, 240 

 oxygen, 105 

 ozone, 105 



Planck's relation, 166 

 in pollen grains, 258, 273 

 by pollen tubes, 254-255 

 porphyrins, 189-190 

 pterins, 190, 191 



steroids, 186-189 

 tissues, apparatus, 226-229 



living cells, 233 



nucleic acid in, 185-187, 344, 

 434-436, 516 



proteins, 172, 184-186, 208. 219, 

 222-224, 435, 436 



reproducibility, liver nuclei, 240 

 triplet state, 168 

 vitamin A, specific, 208 

 vitamin Be (pyridoxine), 192 

 vitamin B12, 192 

 vitamin C (ascorbic acid), 192, 193, 



208 

 vitamin E, 193 

 vitamin K, 193 

 actinic rays, 522 

 action spectrum, 286, 287, 290. 307- 



309, 314-317, 384. 38() 



Ultraviolet radiation, action spectrum, 

 for K saltants, 43() 

 for killing of fungi, 434-436 

 for mutation in fungi, 434-437 

 activation of eggs by, 314, 315 

 chemical rays, 487 

 chromosome aberrations, 257-258, 



268-273 

 cleavage delav by, 298, 300-302, 304, 



305, 307 

 in combination with X rays, 272-273 

 cosmetic filter, 511 

 development time, 546-547 

 disinfection by (see Disinfection by 



ultraviolet) 

 division delav by, 285, 289, 293, 297, 



300, 302-304, 307-309 

 dose D, 546, 547 

 dose-effect curves for mutation in 



fungi, 438-440 

 dose fractionation, effects of, 257 

 dose-reduction ratio, 394, 395 

 doses genetically effective, 256, 269, 



275-281 

 effects of, on development, 290 

 on fermentation, 434 

 genetic, 249-281 



in comparison with X rays, 250, 

 256-260, 262-264, 266-268, 

 271-272 

 on growth of fungi, 433 

 inheritable, 310-312 

 lethal, 286, 287, 289, 292, 294, 319 

 microscopical preparations, 232, 



233 

 miscellaneous, on protozoa, 316-321 

 on respiration in fimgi, 433, 434 

 experimental procedure, biological, 



251-255 

 extreme, 396 

 gross chromosomal changes, induction 



of, 264 

 inactivation by, definition, 456 

 of enzymes, 516 

 of viruses, 343-345 

 intense flashes of, 286, 292, 320, 321 

 intensity of, 109-114 



effect on, of haze, 108-109 



of smoke, 111 

 reflectors to increase, 63 

 internal filtration, 254, 259, 274-275, 



277-279 

 lethals, induction of, 255-257 

 long, 366 



physiological damage l)y, 251-253, 

 256-257, 277 

 (See also Mutations) 

 quartz transmission of, 488 



