著者

渡利 一夫 星野 忠也 木下 睦 岩島 清 本田 嘉秀

出版者

Atomic Energy Society of Japan

雑誌

日本原子力学会誌 (ISSN:00047120)

巻号頁・発行日

vol.18, no.6, pp.336-345, 1976

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原子力開発,それに伴う核燃料再処理工場の稼動,そして低レベル放射性廃液の海洋放出による環境汚染等の問題から放射性Ruの重要性が認識されている。本稿は,放射化学,核燃料再処理,保健物理あるいは海洋放射生態学等の分野における放射性Ruの研究の実情を,それぞれの観点からまとめたものである。

著者

西村 義一 魏 仁善 金 絖崙 渡利 一夫 今井 靖子 稲葉 次郎 松坂 尚典

出版者

公益社団法人 日本アイソトープ協会

雑誌

RADIOISOTOPES (ISSN:00338303)

巻号頁・発行日

vol.40, no.6, pp.244-247, 1991-06-15 (Released:2010-09-07)

参考文献数

14

被引用文献数

4 5

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Chitosan derived from chitin which is a cellulose-like biopolymer distributed widely in nature, especially in shellfish, insects, fungi and yeast, is known to be one of the natural chelating agents. The purpose of the present study is to investigate whether chitosan can be applied to the animal and human body in order to reduce the bioavailability of radiostrontium in foods.Chitosan solution was orally given and immediately after then 85SrCl2 was administered to rats using a stomach tube. The whole-body retention of 85Sr determined by in vivo counting was lower than that of control rats which were not given chitosan. The activity ratio in urine and f eces f or chitosan-treated rats was higher than control rats.Ten percent of alginate food was given to rats during 10 days and 85Sr was administered orally. The whole-body retention of 85Sr alginatetreated rats was decreased sharply compared with control rats.These results suggested that chitosan and alginate can be used as a drug to reduce bioavailability from gastrointestine of ingested radio strontium.

著者

山県 登 岩島 清 永井 輝夫 渡利 一夫 飯沼 武

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.7, no.1, pp.29-46, 1966 (Released:2006-08-29)

参考文献数

13

被引用文献数

9 13

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Two single doses of coupled radioisotopes of 132Cs-86Rb and 132Cs-42K were orally administered to a human subject. Body retention, urinary and fecal excretions as well as the plasma and erythrocytes contents of radioisotopes were determined. The proportion of urinary to fecal excretion was found different in cesium and rubidium, the urinary excretion being 85.3% of the total in the former and only 68.1% in the latter. Loss of cesium in the sweat amounted to 1.5 and 3.5% of the total excretion for the first two days. Uptake by the plasma of oral dose was rapid and the whole blood content reached max. 11.4% of the dose of cesium at 1 hour, while 2.9 and 2.4% respectively of rubidium and potassium was reached. The levels in the erythrocytes seemed to grow at a slower rate in cesium than in the other alkali elements. The different feature of blood metabolism found in the alkali elements was interpreted by the slow rate of clearance of ingested cesium from blood. Daily fluctuations of fall-out 137Cs in blood and the errors involved in the assessment of the total body burden of 137Cs by blood analysis were also discussed.