著者

安元 健 中島 一郎 Raymond BAGNIS 安達 六郎

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.43, no.8, pp.1021-1026, 1977-08-25 (Released:2008-02-29)

参考文献数

7

被引用文献数

201 274

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Experiments were designed to see whether a dinoflagellate, Diplopsalis sp. nov, found in a toxic sample of detritus collected from a ciguatera-endemic area is the cause of ciguatera. The dinoflagellate in the detritus was separated from other materials by means of sedimentation and sieving through sieves of various mesh sizes. Bioassay of the dinoflagellaterich samples thus obtained proved that the toxicity of each sample was proportionally related to the number of the dinoflagellate cells in the sample. Subsequent extraction of the dinoflagellate sample followed by fractionation of the extracts with solvents afforded two major toxins; a diethyl ether soluble toxin and an acetone precipitable toxin. The former toxin was judged to be identical, or closely related, to ciguatoxin, a major toxin in ciguatera, on the basis of various column and thin layer chromatographic properties. A close similarity was also observed between the acetone precipitable toxin and maitotoxin, a secondary toxin isolated from ciguateric surgeonfish. Judging from these results, it was concluded that Diplopsalis sp. nov is very likely to be the cause of ciguatera.

著者

伊木 正二 服部 三郎 田島 一幸 神野 哲一 広部 亮一郎 肥田野 親男 安達 六郎 神谷 国輝 平塚 欣蔵 宮崎 義一 紫雲 千鶴雄 大渡 介一郎 石本 強 小島 鴻次郎 佐藤 喜輔 野上 辰之助 山口 哲二 久保 正明 原 俊郎 白水 護 稲永 守 永江 光夫 徳原 光信 御厨 美年 坪田 督之助 斎藤 義博 渡辺 尚三

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.74, no.843, pp.585-640, 1958-09-25 (Released:2011-07-13)

参考文献数

10

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As in about ten years the new mining machines and technics were imported, the mining method in Japan were changed remarkably.Natural condition of coal seam in Japan (1956)Working depth (Average) 334.7m(Maximum) 836mAverage thickness of seam 1.71mAverage thickness of coal 1.31mOutput from coal face 48.281Mill. t.About 65% of output is worked by longwall method. About 36% of output is gotten by blasting, and 36% by coal picks in coal face, but coal cutters are used pretly well. Hobels are used in Emukae, Takashima, Kogayama and Mitsubishi-Bibai. 55% of output is conveyed Panzer conveyor at coal face.Hydraulic stowing is carried out at Onoura and pneumatic stowing is used at Yamano, Akabira and Sakito coal mines. Slicing method for thick seam is carried out at Hojo and Takashima coal mines.We must decrease the number of coal faces in one pit and increase the output per one coal face, and use the practical working time effectively.