7G0 RADIATION BIOLOGY 



(1950a) The cytological effects of low-intensity radiation. Science. 112: 



332-333. 



(1950b) The effect of X-rays on chromosome structure. J. Cellular Comp. 



Physiol., 35 (Suppl. 1): 71-81. 



and R. T. Brumfield (1943) The relation between X-ray dosage and the 



frequency of chromosomal aberrations. Am. J. Botany, 30: 564-570. 



and H. W. Edmonds (1933) Development of the male gametophyte in 



Tradescantia. Botan. Gaz., 95: 156-163. 



— and E. V. Enzmann (1939) The effect of temperature on the frequency of 

 X-ray induced chromosome aberrations. Proc. Natl. Acad. Sci. U.S., 25: 397- 

 405. 



— - and H. Luippold (1952) The effect of fractional X-ray dosage on the fre- 

 quency of chromosome aberrations. Heredity, 6: 127-131. 



— and K. Mather (1939) An X-ray analysis of progressive chromosome split- 

 ting. J. Genetics, 37: 483-490. 



— and C. P. Swanson (1941) Differential sensitivity of cells to X-rays. Am. J. 



Botany, 28: 52-59. 

 Scholes, G., and J. Weiss (1950) Chemical action of ionizing radiations on nucleic 



acids in aqueous systems. Nature, 166: 640-642. 

 Sparrow, A. H. (1951) Radiation sensitivity of cells during mitotic and miotic 



cycles with emphasis on possible cytochemical changes. Ann. X.Y. Acad. Sci., 



51: 1508-1540. 

 — and M. Maldawer (1950) Differential rejoining as a factor in apparent sensi- 

 tivity of chromosomes to X-ray breakage. Proc. Natl. Acad. Sci. U.S., 36: 



636-643. 

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X rays and its relationship to the nucleic acid cycle in dividing cells. Cancer 



Research, 10: 241-242. 

 and F. M. Rosenfield (1946) X-ray-induced depolymerization of thymus 



nucleohistone and of sodium thymonucleate. Science, 104: 245-246. 

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Survey of biological progress, ed. G. S. Avery, Jr. Academic Press, Inc., New 

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 Swanson, C. P. (1940) A comparison of chromosomal aberrations induced by X-ray 

 and ultraviolet radiations. Proc. Natl. Acad. Sci. U.S., 26: 366-373. 



(1942) The effects of ultraviolet and X-ray treatment on the pollen tube 



chromosomes of Tradescantia. Genetics, 27: 491-503. 



(1943) Differential sensitivity of prophase pollen tube chromosomes to 



X-rays and ultraviolet radiation. J. Gen. Physiol., 26: 485-494. 



(1944) X-ray and ultraviolet studies on pollen tube chromosomes. I. The 



o 



effect of ultraviolet (2537 A) on X-ray induced chromosomal aberrations. Genet- 

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(1947) X-ray and ultraviolet studies on pollen tube chromosomes. II. The 



quadripartite structure of the prophase chromosomes of Tradescantia. Proc. 

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(1949) Further studies on the effect of infrared radiation on X-ray-induced 



chromatid aberrations in Tradescantia. Proc. Natl. Acad. Sci. U.S., 35: 237-244. 



and A. Hollaender (1946) The frequency of X-ray induced chromatid breaks 



in Tradescantia as modified by near infrared radiation. Proc. Natl. Acad. Sci. 

 U.S., 32: 295-302. 



and H. T. Yost, Jr. (1951) The action of infrared radiation on the chromo- 

 somes of Tradescantia. Genetics, 36: 579. 



