10 0 0 0 OA メカノケミカル反応を利用したSUS触媒的水素製造法と二酸化炭素完全分解法の開発
ステンレススチール(SUS304)製遊星型ボールミル中で水をミリングすると、メカノエネルギーとSUSを構成する金属の触媒作用効率良く協調して、非加熱、非加圧で水の全量分解反応が進行し、水素が定量的に生成する。反応の進行にはSUS合金を構成する金属とメカノエネルギーが重要である。水だけでなく炭化水素やエーテルでも同様に水素が効率良く生成することも明らかにした。特に芳香族化合物共存下、ジエチルエーテルをミリングすると芳香核の還元が定量的に進行する。さらにSUS304ボールとH2O、CO2をミリング処理するとCO2がSUSを構成する金属の炭酸塩を経て逐次的にメタンに定量的に変換されることも判った。
4 0 0 0 OA 砂糖ラジカル測定による東海村臨界事故の放射線被曝の推定
- 著者
- 葛谷 昌之 近藤 伸一 伊藤 幸祐 沢 崇史
- 出版者
- 公益社団法人 日本薬学会
- 雑誌
- YAKUGAKU ZASSHI (ISSN:00316903)
- 巻号頁・発行日
- vol.121, no.4, pp.289-293, 2001-04-01 (Released:2002-09-27)
- 参考文献数
- 33
- 被引用文献数
- 1 1
The area of radiation exposure by the nuclear accident occurred at Tokai village in 1999 was estimated by the ESR measurement of 95 household sugar samples collected from the accident area. These samples were roughly classified into three types of sugar, fine white sugar, fine brown sugar and coarse brown sugar. The control fine white sugar showed no radical in the ESR spectrum, while those of fine brown sugar and coarse brown sugar showed the presence of a small amount of radicals. It was also shown that, among these three kinds of sugar, the radical concentration of fine white sugar sampled from wooden houses at the area similar to each other did not vary much with the samples, while those of fine brown sugar and coarse brown sugar varied to a considerable extent. Thus, the fine white sugar is considered to be more suitable for the estimation of the level of radiation exposure. The radical concentration of each fine white sugar sample was plotted against the distance from the site of the nuclear accident with a correction of the difference in the shielding effect between concrete houses and wooden houses. The samples obtained at more than 2 km north of the site of nuclear accident showed no ESR spectral signal to a detectable extent. On the other hand, the ESR spectra were observed from the samples obtained within 10 km south and 4 km west of the accident site. These results suggest that the radiation exposure by the contaminant blown by the northeast wind blowing on the day of the accident may occur at the south and west areas.