文章基本信息

标题：Energy-dependent RBE of Neutrons to Induce Micronuclei in Root-tip Cells of Allium cepa Onion Irradiated as Dry Dormant Seeds and Seedlings.
其他标题：Energy-dependent RBE of Neutrons to Induce Micronuclei in Root-tip Cells of Allium cepa Onion Irradiated as Dry Dormant Seeds and Seedlings.
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作者：WENYI ZHANG ; KAZUO FUJIKAWA ; SATORU ENDO 等
期刊名称：Journal of Radiation Research
印刷版ISSN：0449-3060
电子版ISSN：1349-9157
出版年度：2003
卷号：44
期号：2
页码：171-177
DOI：10.1269/jrr.44.171
摘要：The relative biological effectiveness (RBE) of various energy neutrons produced from a Schenkel-type accelerator at the Research Institute for Radiation Biology and Medicine, Hiroshima University (HIRRAC), compared with 60Co gamma-ray radiation was determined. The neutron radiations and gamma-ray radiation produced good linear changes in the frequency of micronuclei induced in the root-tip cells of Allium cepa onion irradiated as dry dormant seeds (seed assay) and seedlings (seedling assay) with varying radiation doses. Therefore the RBE for radiation-induced micronuclei can be calculated as the ratio of the slopes of the fitted linear dose response for the neutron radiations and the 60Co gamma-ray radiation. The RBE values by seed assay and seedling assay decreased to 174 7, from 216 9, and to 31.4 1.0, from 45.3 1.3 (one standard error), respectively, when neutron energies increased to 1.0 MeV, from 0.2 MeV, in the present study. Furthermore, the ratio of the micronucleus induction rates of seed assay to seedling assay by gamma-ray radiation was much lower than that by neutron radiations.
关键词：RBE; Neutron; Micronucleus; Onion