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Ishizumi, Taichiro*; Usuda, Jitsuo*; Inoue, Tatsuya*; Iijima, Yoshihito*; Maehara, Sachio*; Furumoto, Hideyuki*; Oka, Kiyoshi; Ikeda, Norihiko*
no journal, ,
no abstracts in English
Furumoto, Hideyuki*; Usuda, Jitsuo*; Maehara, Sachio*; Imai, Kentaro*; Ishizumi, Taichiro*; Honda, Hidetoshi*; Oka, Kiyoshi; Kajiwara, Naohiro*; Ohira, Tatsuo*; Ikeda, Norihiko*
no journal, ,
no abstracts in English
Oka, Kiyoshi; Seki, Takeshi*; Usuda, Jitsuo*; Maehara, Sachio*; Furumoto, Hideyuki*; Otani, Keishi*; Shigetomi, Hiroshi*; Kobayashi, Hiroshi*
no journal, ,
no abstracts in English
Koarai, Kazuma; Matsueda, Makoto; Fujiwara, Kenso; Ono, Takumi*; Kino, Yasushi*; Oka, Toshitaka; Okutsu, Kenichi*; Takahashi, Atsushi*; Suzuki, Toshihiko*; Shimizu, Yoshinaka*; et al.
no journal, ,
We have investigated incorporation of 
Sr and 
Cs in teeth of cattle and otoliths of fish. Specific activity of Sr in the dentin tissue was higher than that in the enamel tissue. The result shows change of Sr incorporation in cattle even within a tooth. Concentrations of stable Sr and Cs were 94 ppm and 3 ppb. Distributions of stable Sr and Cs were uniform in the otolith of fish. If distribution of Sr and Cs in the otolith was measured, change of Sr and Cs incorporation into the fish would be found. These findings suggest that distribution patterns of Sr and Cs in the environment could be estimated from distribution of the radionuclides in the tooth and otolith.
Koarai, Kazuma; Matsueda, Makoto; Aoki, Jo; Yanagisawa, Kayo*; Fujiwara, Kenso; Terashima, Motoki; Kino, Yasushi*; Oka, Toshitaka; Okutsu, Kenichi*; Yamashita, Takuma*; et al.
no journal, ,
We demonstrated a method of Sr measurement in small pieces of hard tissues with radioactivity measurement or ICP-MS measurement. Interference elements of the measurements were removed by chemical separation. We could determine Sr in 0.1 g of hard tissues by radioactivity measurement method and ICP-MS method. Limit of detection of the ICP-MS method was lower than that of the radioactivity measurement. The ICP-MS method is adequate method for distribution analysis of Sr in the hard tissues.