584 



RADIATION BIOLOGY 



Tndir.'ct .'ITccts. 3:^5 337 

 Iii(iu('('(l polyploidy, 443 

 Iiuluccd prcdissociat ion. ti. 11 

 Infectivity, cffei-t^; of r;idi:it ion on, '2HH. 



291, 319 

 Influenza virus, 349, 351 



separation of properties of, 349 

 Infrared intensity, 114-117 

 Infrared speetrum, 115, 116 

 Inheritable effects of radiation on i)ro- 

 tozoa, miscellaneous, iilO 312 



mutation, 289, 309, 310, 312-314 

 Inheritance of differences in sensitivity 



to radiation, 291 

 Inhibition of chain reactions. 30-31 

 Injury substances, 295 

 Intensities. 5 

 Intercombination rule, 2 

 Interference ph(>nomena, 348. 350, 351 

 Intermittent ilhnnination. 31 

 Internal conversion, 6-9, 27 



and dissociation, 15 



and isomerization, 33-34 

 Invertebrates, marine, 292, 298-300, 



303-305, 315. 321, 322 

 Iodine, 432 

 Ionization, 339 



densities, 372 



direct effect of, 416 



indirect effect of, 374 



quantum absorption, 415 



residual effect. 415 

 Ionizing radiations, 335 



direct effect of, 337 



indirect effects of, 335-337 

 Isomerization, photochemical, 31-34 



K 



K saltation, 434-436 



Kanpri cancers, 552 



Kappa inactivation by radiation, 311, 



312 

 Kinetics, first-order, 372 

 Kinetosomes, effect of alpha radiation 



on, 288 



Lagrange's law, 123 



Lambert's law in cytochemistry, 206, 



230 

 Latent viruses, 358-360 

 Lethal action (see Ciermicidal action) 

 Lethal effects of radiation {see Cell 



death) 

 Lethe, unit of kill, 43. 45, 49 



l.cMikotaxine, c!i|)illary i)erme!d)ility, 

 518 

 increase in, 518 

 Life time of excited state, actual. 5 



natural, 5 

 Light, inhibition of bacteriojjhage devel- 

 oi)ment by, 470 

 reactivation of injured organisms by, 



50 

 visible (see Visible light) 

 Light sources, energy output. 12()-128 

 life time of, 126-128 

 means of excitation, arc. 121 

 discharge, \2i\ 

 spark, 121 

 thermal, 126 

 power re(juirem(>nts, 126-128 

 source size, 12()-128 

 spectral distribution of emitted light, 

 126-128 

 Liverworts (Sphaerocarpus) , 249, 253, 



274, 280-281 

 Localization, intracellular, alkaline 

 phosphatase, 211 

 fixation for, 210-212 

 iron, 211 



nucleic acid, 212-217 

 protein, 217-219 



by ultraviolet absorption, 219-224 

 Localized irradiation of cells, 315 

 Long-lived em^rgetic states, 9-12 

 Luminescence, 400 

 Lycopersicum esculentutn (tomato), 265- 



266 

 Lysogenic bacteria, 351, 396 

 induction of, 359 

 photoreactivation, 470 



M 



Macronucleus, effect of radiation on, 



288, 313 

 xMaize (Zea mai/s), 249, 253-255, 258- 



268, 270, 273-277, 279-280 

 Maize pollen grains, 411 

 Malpighian layer, 535 

 Mastigophora, 287-289, 293, 297, 303, 



316, 320-322 

 Mating type, effects of radiation on, 



312, 316, 317 

 Mean lethal doses (MLD), 370, 372 



37 per cent survival dose, 372 

 Mean life of excited state, 5 

 Mechanism of reaction, 1, 20-21, 25-26 

 photosensitized reaction. 10 

 and steady-state approximation, 21- 

 26 



