著者

木村 健二郎 南 英一 本田 雅健 横山 祐之 池田 長生 不破 敬一郎 夏目 晴夫 石森 達二郎 佐々木 行美 酒井 均 水町 邦彦 浅田 正子 阿部 修治 馬淵 久夫 鈴木 康雄 小松 一弘 中田 賢次

出版者

公益社団法人 日本分析化学会

雑誌

分析化学 (ISSN:05251931)

巻号頁・発行日

vol.3, no.4, pp.335-348, 1954-08-15 (Released:2010-01-14)

参考文献数

15

被引用文献数

16 14 13

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In order to find the proper method of medical treatment for the afflicted men on board the No.5 Fukuryu Maru on March 1, 1954, it was necessary to know the species and amounts of radioactive elements in the dust of the so-called Bikini Ashes which had fallen on board.At the request of the Hospital of Tokyo University, the authors started analyses on March 18.A combined method of chemical separation with the use of carriers and separation with the use of ion exchange resin was applied;17 nuclides were detected and the results of quantitative estimation of alkaline earth metals were reported on March 31.The main constituent of the ashes was found to be calcium hydroxide and its radioactivity was 0.37mC/g (April 23) which was decayed proportionally to -1.37 power of the time elapsed.The chemical group separation was carried out as shown in Table 3; the second, third(especially rare earth metals)and fifth(alkaline earth metals)analytical groups showed strong radioactivity.By ion exchange method(Fig. 4), the fraction of anions, Zr and Nb fraction, U fraction, the fraction of rare earth metals and the fraction of alkaline earth metals were separated.Furthermore, each constituent of those fractions was estimated quantitatively.In order to confirm the presence of 129mTe, 129Te, 131I, 132I, 103Rn, 106Ru, 106Rh, 95Zr and 95Nb, the chemical method was used.The members of alkaline earth metals, e.g.45Ca, 89Sr, 90Sr, (90Y), 140Ba and (140La), and the members of rare earth metals, e.g.91Y, 141Ce, 143Pr, 144Ce, 144Pr and 147Nd were estimated after the separation with the use of ion exchange resin.The presence of 237U was confirmed from its radioactivity and chemical properties.Also α-tracks of 239Pu.were detected by autoradiograph ic method.Table 6 indicates the summary of the results.

著者

不破 敬一郎 松本 和子

出版者

一般社団法人 日本生体医工学会

雑誌

医用電子と生体工学 (ISSN:00213292)

巻号頁・発行日

vol.22, no.4, pp.285-289, 1984-08-30 (Released:2011-10-14)

参考文献数

6

著者

松本 和子 不破 敬一郎

出版者

The Society of Synthetic Organic Chemistry, Japan

雑誌

有機合成化学協会誌 (ISSN:00379980)

巻号頁・発行日

vol.39, no.11, pp.1053-1061, 1981-11-01 (Released:2009-11-13)

参考文献数

34

被引用文献数

2 2

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The history of the study of zinc enzymes and their characteristics and the classification are briefly surveyed, together with the general remarks on the structure and function of metals in metalloenzymes. Among about 90 zinc enzymes so far discovered, special emphasis is placed on horse liver alcohol dehydrogenase and the recent experimental results of UV-VIS spectra, circular dichroism and X-ray crystallography are presented. The M. W. of horse liver alcohol dehydrogenase is 80, 000 and the enzyme consists of two subunits, each of which contains two zinc atoms, and 2 mols of NAD+ is necessary as cofactor for the enzyme. The details of the structure and the function of zinc in the enzyme are discussed and the possible reaction mechanism is explained. The paper also briefly introduces the recently extracted human liver alcohol dehydrogenase.