588 



RADIATION BIOLOGY 



Photosynthesis, 37 

 rhysar'iuin. 320. 321 

 Pi(;inonted ncvi, 552 

 IManck constant, 497 

 Phmt viruses, photoreactivation, 470 

 Phisnionucleic acid, 213 

 Polar cap te( liiii(nie, 251, 258, 273, 277 

 Pole cells, irradiation with ultraviolet, 

 251-252 

 multiplication of, 252 

 mutations induced in, 252 

 techniques of exposure to ultra\ iolrt, 

 251, 255, 258 

 Pollen, 253, 259, 200. 204, 273-274 

 defective, 259-200, 204, 200 

 transmission of ultraviolet throuffli, 



254. 270, 273-274, 279 

 tube chromosomes, 208-273 

 tube culture, 254 255 

 Pollen tube, limitations of culture tecli- 



nique, 254-255, 208 

 Polymerization reactions, photoclienii- 



cal, 30-31 

 Polytoma, 287, 288, 307, 320 

 Postirradiation treatment, increasinfi; 

 temperature of incubation, 300, 394 

 photoreactivation, 300 

 Potential energy diagrams, 3, 7—8 

 Predissociation, 5 



induced, 6, 14 

 Primarv photochemical process, 389, 



492, 502 

 Primary steps, 1 

 Probability of transition, 2, 4 

 Proliferation, 543 

 Prophage, 359 

 Protamine, 218 



Protection, of products, antibiotics, 

 molds, 84 

 meat storage, aging or curing, 85 

 syrups, juices, 85 

 wine storage, 85 

 sunburn, 508 



(See also Modification of radiation 

 effects) 

 Protective agents, 335 

 Protein synthesis, 400 

 Proteins, denaturation of, 33-34 

 staining and tests, 217-219 

 ultraviolet absorption, 208, 219, 

 222-224 

 Proton transfer reactions, 10-17 

 Protoplasmic constituents, 414 

 Protozoa, 285if. 



motility and l)ehavior, 280, 288, 316, 



317, 320 

 mutations, 289, 309, 310, 312-314 

 nitrogen mustard effects, 311-313 



Protozoa, parasitic, 288, 291, 319 

 photoreactivation, 479-481 

 radiation effects, inheritable, 289, 



309-314 

 radium effects, 292, 297, 303, 310, 

 322 



Q 



Quantum efficiency, 385 

 Quantum-hit interpretation, 387 

 (Quantum yield, 342 



of fluorescence, 5, 10-11 



of photochemical reactions, 10-11, 

 14, 30 

 (Quenching of fluorescence, 12-13, 20 



R 



Uadiant flux, definition of, 122 

 Uadiant intensity, definition of, 122 

 Radiation, alpha (sec Alpha radiation) 

 bactericidal effects, lethal, killing, 



inactivation, 30() 

 beta (see Beta radiation) 

 coagidation of protoplasm l)v, 286, 



287 

 effect of, on cytoplasmic particles, 

 311, 312 

 on development, 290, 300, 303 

 on excystment of protozoa, 315-317 

 on infectivity, 288. 291. 319 

 inheritable, on protozoa, 289, 309- 



314 

 lethal {see Cell death) 

 on macronucleus, 288, 313 

 on mating type. 312, 310, 317 

 recovery from, 292, 293, 297-303 

 {See also Modification of radia- 

 tion effects) 

 on respiration, 290, 322 

 erythemal {see Erythemal radiation) 

 exposure to, chronic, 303, 310, 311 

 gamma (see Gamma radiation) 

 infrared, 502 

 ionizing, 335-337 

 ionizing protons, 369 

 mercury-arc, 529. 532 

 oxygen-dependent effects, 420 

 oxygen-independent effects, 420 

 sensitivity to {see Sensitivity to ra- 

 diation) 

 toxic substances produced by, 290 

 ultraviolet (see Ultraviolet radiation) 

 X rays, 367/. 

 copper-K, 368 

 40-kvp, 368 

 soft, 367 

 "Y" and "Z" ray.s, 522 



