Abstract
THE data reported by Barendsen and Broerse1 for the oxygen enhancement ratios in human cell cultures subjected to neutron radiation have prompted us to report the values which we have obtained for a completely different biological system—that of induction of somatic mutation in the staminal hair cells of a diploid clone (02) derived from a variety of Tradescantia occidentalis. Briefly, the irradiation induces the appearance of homozygous recessive mutant cells of a red colour which are distinguishable from the normal heterozygous blue cells. The system has been used previously to obtain relative biological effectiveness (RBE) values for negative µ mesons (ref. 2) and 650 keV neutrons (ref. 3).
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References
Barendsen, G. W., and Broerse, J. J., Nature, 212, 722 (1966).
Davies, D. R., Sparrow, A. H., Woodley, R. G., and Maschke, A., Nature, 200, 277 (1963).
Davies, D. R., and Bateman, J. L., Nature, 200, 485 (1963).
White, D. A. F., and Smith, S. E., Inert Atmospheres, 191 (Butterworths Scientific Publications, 1962).
Davies, D. R., Radiat. Res., 20, 726 (1963).
Congar, A. D., and Giles, N. H., Genetics, 35, 397 (1950).
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DENNIS, J., BOOT, S. Dependence of the Oxygen Enhancement Ratio on Neutron Energy. Nature 215, 310–311 (1967). https://doi.org/10.1038/215310a0
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DOI: https://doi.org/10.1038/215310a0
