328 ItADIATION UIOLOGY 



Kimball, R. F., R. P. r.ccklcr, aiid N. (1. (iaithc-r (1952) Division delay by radiation 

 and nitrogen ninstard in I'artimcrium. .1. Celhdar ('oni|). i'liysiol., JO: 127 loil. 



Koohring, V. (H>40) The additive effects of radon and neutral r«(| upon Chiios rhnos. 

 Radiology, :55: 22<t 2:i5. 



Laeassagne, A. (HKMa) Le i)rol>lenie des (pianta en radiohiologie (point de vue 

 biologique). Radiopliysiol. et radiotluTapie, :<: 215 2:51. 



(1934b) Le probleine des (pianta en radiobiologic. J. radiol. <'t eleetrol., 



18: 55:i-5()(). 



I,a\vrie, N. R., and M. Robertson (l'.):{5) The effect of 7-ray irradiation upon the 

 growth and nitrogenous metabolism of the protozoon, Undo raudatu.s. Biochem. 

 J., 29: 1017-1020. 



Lea, D. E. (1938a) A theory of the action of radiations on biological matorials 

 capable of recovery. Brit. .1. Radiol., 1 1 : 489 497. 



(1938b) A theory of the action of radiations on biological materials capable 



of recovery. Part II. Delay in cellular division. Brit. J. Radiol., 11: 554 500. 



(1947) Actions of radiations on living cells. The Macinillan Company, New- 



York. Pp. 282-306; 307-344 (also Cambridge University Press, London, 194G). 

 Lee, H. (1949) Change of mating type in Paramecium bnrsaria following exposure to 



X rays. J. Exptl. Zool., 112: 125-130. 

 Levaditi, J. C, and R.-O. Prudhomme (1945) Xature du rayonnement lumineux 



que suprime la niobilite des micro-organisms doues de fluorescence secondaire en 



presence de thioflavine. Ann. inst. Pasteur, 71: 422-430. 

 Levin, B.-S., and C. Piffault (1934a) Augmentation de la radio-resistance des proto- 



zoaires, par la lecithine en solution colloidale. Compt. rend. 198: 2024-2026. 

 (1934b) Augmentation de la radio-resistance des protozoaires cultivcs dans 



un milieu cholestcrine. Compt. rend. soc. biol., 116: 627-629. 



(1934c) Action des milieux de culture contenant des melanges de I6cithine 



et de cholestcrine sur la radio-resistance des protozoaires. Compt. rend, .soc 

 biol., 116: 861 864. 

 Litwer, G. (1935a) Von der hemmenden Wirking der Ultraviolett-Strahlung auf die 

 Sporulation der Coccidien. .\rch. Protistenk., 85, 384-394. 



(1935b) Der Einfluss von geringen Dosen der I'ltraviolett-strahlen auf die 



Stabilitate des Sporulation.s-i'yklus bei Kannincoccidien. Arch. Protistenk., 85: 



395-411. 

 Loeb, J. (1914) Activation of the unfertilized egg by ultraviolet rays. Science, 40: 



68t)-681. 

 Loofbourow, J. (1948) Effects of ultraviolet radiation on cells. Growth, 12, Suppl.: 



77-149. 



Luck6, B., R. A. Ricca, and A. K. Parpart (1951) Differential effects of roentgen 

 rays on cell permeability and on cell cleavage. Experiments with eggs of Arharia 

 punctulata. J. Natl. Cancer Inst., 11: 1007-1023. 



McAulay, A. L., and M. C. Taylor (1939) Lethal and (juasi-lethal effects produced 

 by monochromatic ultraviolet irradiation. J. I'^xptl. Biol., Ki: 474-482. 



MacDougall, M. 8. (1929) Modifications in Chilodon iinrinalu.s produced by ultra- 

 violet radiation. J. Exptl. Zool., 54: 95-109. 



(1931) .Vnother mutation of Chilodon uncinatus produced by ultraviolet 



radiation with a description of its maturation processes. J. Exptl. Zool., 58: 

 229-236. 



Marshak, A. (1949a) Recovery from ultra-violet light-induced delay in cleavage in 

 Arhacia eggs by irradiation with visible light. Biol. Bull., 97: 244. 



(1949b) Recovery from ultra-violet light-induced delay in cleavage of 



Arbacia eggs by irradiation with visible light. Biol. Bull., 97: 315-322. 



Mazia, D., and H. L Hirshfield (1951) Nucleus-cytoplasm relationships in the action 

 of ultraviolet radiation on Amoeba proteus. Exptl. Cell Research, 2: 58-72. 



