- 著者
-
定家 義人
井上 正
望月 肇
賀田 恒夫
- 出版者
- Journal of Radiation Research 編集委員会
- 雑誌
- Journal of Radiation Research (ISSN:04493060)
- 巻号頁・発行日
- vol.22, no.4, pp.387-394, 1981
- 被引用文献数
-
2
When spores of Bccillus subtilis were treated in a frozen state with tritiated glycerol of different concentrations (up to 160 μCi/ml), efficiencies of killing and mutation induction per absorption dose were higher in solutions of lower tritium concentrations where low dose-rate β-irradiations were performed. Similarly when transforming DNA of Bacillus subtilis was kept with tritiated glycerol solution of concentrations ranging 0.05-500 μCi/ml at 4°C, efficiency of inactivation of the arginine marker increased strikingly by lowering the tritium concentration. On the other hand, the RBE of DNA-strand scissions of colicin El plasmids exposed to tritiated glycerol of a relatively high concentration (680 μCi/ml) was found to be approximately 1, when compared at the same absorption dose of gamma-irradiation (36 kR/hr) from a <SUP>137</SUP>Cs source.