Long-Lived Radioiodine in Japanese Environment

被引：0
作者：
R. Seki
M. Watanabe
K. Kurihara
机构：
[1] University of Tsukuba,Department of Chemistry
[2] Tsukuba,Department of Chemistry
[3] University of Tsukuba,undefined
[4] Tsukuba,undefined
来源：
Journal of Radioanalytical and Nuclear Chemistry | 2000年 / 243卷
关键词：
Japan; Physical Chemistry; Europe; Inorganic Chemistry; Dietary Intake;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The amount of long-lived radioiodine, 129I (half-life 1.57·107 y) in the Japanese environment has been studied by measuring thyroids of humans and animals. The collected samples were thyroids of (1) humans in Ibaraki Prefecture, in Kanto district, the central part of Japan, (2) cattle in Aomori Prefecture, north part of Japan, and (3) wild deer in Chiba Prefecture, in Kanto district. The measured mean isotopic ratio 129I/127I for thyroids of cattle in Aomori Prefecture is 3.5±1.8·10-9. A higher value of 14±5·10-9 has been obtained for thyroids of wild deer in Kanto district. On the other hand, the measured ratio for human thyroids in Kanto district is 1±0.2·10-9. This value is significantly lower than that of cattle thyroids in Aomori and also those reported for human thyroids in Europe and USA. The higher mean ratio for cattle thyroid in Kanto district is possibly explained by the influence of nuclear reprocessing plant. Lower mean ratio for human thyroid might be due to higher dietary intake of algae.
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页码：383 / 386
页数：3
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