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タイトル: Striped dolphin detoxificates mercury as insoluble Hg(S, Se) in the liver
著者: Ng, Poh-Sing
Ji, Hui
Matsumoto, Kazuko
Yamazaki, Sunao
Kogure, Toshihiro
Tagai, Tokuhei
Nagasawa, Hiromichi
著者(別言語): 長澤, 寛道
キーワード: Striped dolphin
Stenella coeruleoalba
marine mammal
発行日: 2001年
出版者: Japan Academy
掲載誌情報: Proceedings of the Japan Academy. Ser. B, 77(9), 2001, pp. 178-183
抄録: Sea mammals are known to contain high concentrations of mercury and selenium especially in the liver with no apparent symptoms of poisoning. We examined the chemical form of mercury and selenium in the liver of striped dolphin, Stenella coeruleoalba. Neither mercury nor selenium could be extracted with acetone, 80% ethanol or 0.2 M ammonium acetate. The residue after extraction was digested most effectively with alkaline protease, resulting in solubilization of almost all the material (99% by weight) but still leaving a small amount of insoluble material (1%), which contained 80% of mercury and 66% of selenium of the original amount. This insoluble material was subjected to transmission electron microscopic analysis, X-ray microanalysis, X-ray diffraction analysis and elemental analysis, which revealed that the material contained spherical crystals of Hg(S 0.34, Se 0.66) with 5-10 nm in diameter as a major component. These crystals may be the final detoxification product of mercury.
URI: http://hdl.handle.net/2261/7404
ISSN: 03862208
出現カテゴリ:1160410 学術雑誌論文
014 自然科学


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