Abstract
SOME years ago, Thoday and Read1,2 discovered that the frequency of chromosome aberrations produced by X-rays in root tips of Vicia faba is dependent on oxygen tension during irradiation, while that produced by α-rays is not. Since then this discovery has been confirmed by several investigations, and a similar effect of oxygen was found also, when other tissues and organisms were used as experimental material (for references, see Giles3 or Gray4). In the case of X-rays, therefore, it seems to be a general rule that much less chromosome damage of the physiological, as well as of the structural, type is obtained when the irradiations are performed in the absence than in the presence of oxygen.
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References
Thoday, J. M., and Read, J., Nature, 160, 608 (1947).
Thoday, J. M., and Read, J., Nature, 163, 133 (1949).
Giles, N. H., “Symp. on Radiobiology” 267, ed. J. J. Nickson (J. Wiley and Sons, New York, 1952).
Gray, L. H., Brit. J. Radiol., 26, 609 (1953).
Fabergé, A. C., Genetics, 35, 104 (1950).
Kihlman, B., Symb. Bot. Upsal., 11, No. 2, 1–40 (1951).
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Revell, S. H., Symp. on Chromosome Breakage (Supp. Heredity, 6), 107 (1953).
McLeish, J. Symp. on Chromosome Breakage (Supp. Heredity, 6), 125 (1953).
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KIHLMAN, B. Effect of Oxygen on the Frequency of Chromosome Aberrations produced by 8-Ethoxycaffeine. Nature 174, 561–562 (1954). https://doi.org/10.1038/174561a0
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DOI: https://doi.org/10.1038/174561a0
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