590 



KADlA'i'lON HlOLOfiY 



Spciiii.itozoa. 251 25:^. 2")t> 'l'^~ . 277 

 SpcniiMtozoids, swiiiiniiiin. 2"):^ 2") I. 



274. 280-281 

 Sphan-orfiri>iis (livciwoits i. 2 I'.t. 2"):{, 



274, 2S() 2S1 

 Spirostomum, 316, 320-322 

 Sporofioiiia, sphaor<)eari>us, 2S0 

 S([U;Ulioiis cell, r>X\. ryiW 

 Steady-state approximation, 21-26 

 Stop wcdfics. 134 

 Stcradiaiicy, ilolinitioii of. 122 

 Sterility, ultraviolet induced, 2y>i\. 258, 



277 

 Stirring, effect on photochemical reac- 

 tions, 20 

 Stokes's law, 3 

 Stream birefringence. 411 

 Streptomyces fiaveolus, 437, 43*), 445. 

 446 



(jriseus, 437, 441, 445 

 StrongylocentrolHS. 2<)!), 300, 301, 3()(i, 



314, 318. 322 

 Sti/Ionychia. 292. 316. 321 

 Substrate, chemical trc-itnicnt of. 412 



irradiation of, 412 

 Sun. chromo.sphero. 97, 98 



corona, 97, 99 



infrared spectrum. 114-117 



photosphere. 95, 96 



radio emission. 99 



reversing layer. 97 



spectral intensity. 102, 103. 108 



ultraviolet spectrum. 97, 98. 103 



X-rav emission. 100 

 Sunburn. 487. 508 



of eyes. 488. 520 



inflammation substances. 518 



inHammatory processes, 489 



inflammatory responses. 518 



protection, 508 

 Sunlamps, 90-91 

 Sunlight, 488. 492. 522, 553, 557 



absorption of ozone, 520 



active hyperplasia, 550 



optics of skin, 488 



jjrophylactic measures, 557 

 Survival curves, bacteria, 472 



bacteriophages, 457, 459 



exponential, 368 



in fungi, 437, 438, 445, 446 



Target theory, 287, 288. 338-343, 370, 



372. 374. 415 

 TCA (see Trichloroacetic acid) 

 Temperature, effects of, on radiation 

 injtiry, 299. 300. 304. 317. 318 



on ultraviolet killing. 442 



Termolecular steps. 19, 22 

 Thermocou|)le (see Detectors, tlicrnial) 

 Thiamine, speeilic ab.sorption, 208 

 'I'hiourea, 33() 

 Tobacco niosiac virus, 336, 340, 344, 



346, 380 

 Tobacco necrosis virus. 340. 395 

 Toluidine blue, metachromasia, 215 

 Tomato (Lycopersicum esculentutu), 265- 



2()6 

 Tomato bushy st\int virus, 340 

 Torulopsis cremoris, 445. 447, 448 

 Toxic substances produced l)y radiation, 



290 

 Tradescantin, 249, 254-255, 268-274, 

 278. 381. 387 

 ultraviolet-induced aberrations in, 

 249. 254-255, 2()8-274. 278 

 Transfer of excitation. 13-14 

 Transmi.ssion. 205. 236 

 carbon dioxide. 1 16 

 coefficient of, 96 

 ozone, 116 

 water, 115 



water vapor, 115-117 

 Transmutation, mutagenic effects of, 



314 

 Tricliloroacetic acid (TCA) as cyto- 

 chemical reagent, 214, 221, 222 

 Trichophyton. 276 



nientnyrophytcs, 435, 437, 438, 446, 

 447 

 Triosephosphate deliydrogenase, reacti- 

 vation, 456-457 

 Triplet states of complex molecules, 7, 



9-12 

 Trypanosoma, 286, 288, 319, 320 

 Tryptophane, 336 



specific absorption, 208, 218 

 Tumors, 530, 533-535, 542, 551, 552 

 development, 537, 548 

 development time of discontinuation 



of dose, 548 

 growth of, 543 



progressive acceleration of, 548 

 induced by spectacles, 552 

 sebaceous gland, 534, 535 

 (See also Cancer) 

 Two-hit killing curves, 369, 370 

 Tyrosine, specific absorption, 208, 218, 

 237 



U 



Ultraviolet-irradiated culture medium, 



436, 437 

 peroxide in, 437 

 Ultraviolet killing, temperature effect 



on, 442 



