文献一覧: 中田賢 (著者)

12 0 0 0 OA 第五福龍丸に降った放射性物質について

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

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.

2 0 0 0 寄書

著者: 北野邦尋遠藤一夫大竹研至松浦明徳海野肇明畠高司上和野満雄斉藤良一大島伸夫本吉孝正西泰英葭村雄二上田光三郎森冬比古椎野和博川合誠一郎吉岡直哉桜井正明辻本清彦原納淑郎古崎新太郎中田賢一宮内照勝坂高芳大村朔平岩本紘武
出版者: The Society of Chemical Engineers, Japan
雑誌: 化学工学論文集 (ISSN:0386216X)
巻号頁・発行日: vol.5, no.2, pp.194-218, 1979

2021-09-28 03:30:10
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2 0 0 0 人工地盤と液状化-宮城県鳴瀬町の液状化事例を中心に-

著者: 原口強木村克己宮地良典高倉伸一国松直稲崎富士青野道夫野口剛宏中田賢
出版者: 公益社団法人地盤工学会
雑誌: 地盤工学研究発表会発表講演集
巻号頁・発行日: vol.39, pp.2075-2076, 2004

2003年宮城県の2回の地震では鳴瀬町の水田で規模の大きな液状化が発生した。地上型レーザースキャナーによる地表面高精度計測、電気探査、ボーリング、ジオスライサー等を実施した結果、液状化は砂採取跡の池を山砂で埋立てした地盤に限定して発生していた。新潟地震以降、国内の液状化発生代表事例を再検討した結果、人工地盤か、自然地盤かに関わらず、液状化は短期間の水中堆積で埋め立てられた新しい地盤で発生し易いという共通点が認められた。こうした場所は土地の履歴調査で特定できる。現在の液状化判定法に加えて、詳細な土地の履歴調査を行い埋立履歴と範囲・方法等が特定できれば、液状化の範囲をより精度よく予測可能となる。