著者

松葉 満江 石井 紀明 中原 元和 中村 良一 渡部 輝久 平野 茂樹

出版者

公益社団法人 日本アイソトープ協会

雑誌

RADIOISOTOPES (ISSN:00338303)

巻号頁・発行日

vol.49, no.7, pp.346-353, 2000-07-15 (Released:2011-03-10)

参考文献数

11

被引用文献数

5 6

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誘導結合プラズマ質量分析法を用いて61種の海洋生物中のウラン濃度を定量するとともに沿岸水も分析して被曝線量推定に重要なパラメータである濃縮係数を算定した。海洋動物の軟組織中においてウラン濃度は, 湿重量当たり0.077から5040ng/g生の範囲にあり, 生物種の違いや部位でウラン濃度が大きく異なった。頭足類のエラ心臓には高濃度のウランが含まれていた。特にマダコのエラ心臓が最も高い値を示したが, 沿岸水のウラン濃度の平均値は3.1ng/mlであったので濃縮係数は1.6×103と計算された。海産魚の硬組織中のウラン濃度は軟組織よりも高く, 硬組織の存在割合が個体中のウラン濃度を支配していると考えられた。海藻中のウラン濃度は湿重量当たり2.0-310ng/g生の範囲にあったが, ワカメが最も高い値を示し濃縮係数は102と計算された。

著者

磯山 直彦 及川 真司 御園生 淳 中原 元和 中村 良一 鈴木 奈緒子 吉野 美紀 鈴木 千吉 佐藤 肇 原 猛也

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.57, no.9, pp.763-769, 2008 (Released:2008-11-07)

参考文献数

13

被引用文献数

2 4

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For the purpose of marine environmental radioactivity monitoring, stable Cs and 137Cs concentrations were obtained from 214 marbled flounder (Pleuronectes yokohamae) samples collected from off the coast of Ibaraki prefecture in Japan in 2005 and 2006. Prior to the investigation, an analytical method for the determination of Cs in muscle of marbled flounder samples by inductively coupled plasma mass spectrometry (ICP-MS) was seriously considered from the view point of sample preparation (wet way) to a Cs measurement. Since major problems in determining Cs by the ICP-MS is the interference of matrix materials and molecular ions on Cs peak area (m/z 133), a known amount of In (m/z 115) was added to the sample solutions as an internal standard. To check the accuracy of the determination, duplication analysis and standard reference materials were used. Analytical results of Cs in muscles samples by ICP-MS agreed well with duplicated samples, and standard reference materials. The standard length and body weight were obtained from a total of 214 flounder samples. The stable Cs, stable K and 137Cs concentrations in muscle were determined by ICP-MS, flame photometry and radiochemical analysis, respectively. The mean standard length correlates closely with the mean body weight. The stable Cs concentration was in proportion to the body weight, also, the 137Cs concentration correlated closely with the stable Cs concentration in muscle. On the other hand, a stable K concentration was found to be uniform, and unrelated with 137Cs and stable Cs concentrations. The specific activities, the ratio of 137Cs/stable Cs in muscle, was found to be 5.5∼6.7 with an average of 6.2±0.35 (SD) among five different size groups of the standard length of marbled flounder samples. From these results, ICP-MS provided useful tools for the determination of a trace amount of Cs in muscle samples, combined with wet way pretreatment techniques. In addition, marbled flounder proved to be a useful species for comparing the radioactivity of fishes in coastal seas around Japan with each other in the environmental radioactivity monitoring program.

著者

中村 良一

出版者

公益社団法人 日本獣医師会

雑誌

日本獣医師会雑誌 (ISSN:04466454)

巻号頁・発行日

vol.34, no.9, pp.440-445, 1981-09-20 (Released:2011-06-17)

参考文献数

22

著者

中村 良一

出版者

公益社団法人 日本獣医師会

雑誌

日本獣医師会雑誌 (ISSN:04466454)

巻号頁・発行日

vol.34, no.8, pp.395-398, 1981-08-20 (Released:2011-06-17)

著者

中村 良一

出版者

公益社団法人 日本獣医師会

雑誌

日本獣医師会雑誌 (ISSN:04466454)

巻号頁・発行日

vol.34, no.7, pp.336-341, 1981-07-20 (Released:2011-06-17)

著者

中村 良一 小野 威 磯田 政恵

出版者

公益社団法人 日本獣医師会

雑誌

日本獣医師会雑誌 (ISSN:04466454)

巻号頁・発行日

vol.6, no.9, pp.309-311, 1953-09-20 (Released:2011-06-17)

参考文献数

29

著者

中村 良一 加藤 昭男

出版者

公益社団法人 日本獣医師会

雑誌

日本獣医師会雑誌 (ISSN:04466454)

巻号頁・発行日

vol.6, no.6, pp.199-201, 1953-06-20 (Released:2011-06-17)

参考文献数

27

著者

中村 良一

出版者

公益社団法人 日本獣医師会

雑誌

日本獣医師会雑誌 (ISSN:04466454)

巻号頁・発行日

vol.10, no.2, pp.86-90, 1957-02-20 (Released:2011-06-17)

著者

中村 良一

出版者

公益社団法人 日本獣医師会

雑誌

日本獣医師会雑誌 (ISSN:04466454)

巻号頁・発行日

vol.34, no.10, pp.501, 1981-10-20 (Released:2011-06-17)

著者

中村 良一 中原 元和 石井 紀明 上田 泰司 清水 千秋

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.45, no.6, pp.757-762, 1979-06-25 (Released:2008-02-29)

参考文献数

18

被引用文献数

3 1

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The relations between the accumulation-elimination of radionuclides and the constituent materials of marine algae were studied to determine more precisely the mechanism of the radioactive contamination of marine organisms. This will increase the information about the behavior of radionuclides in marine organisms in relation to the environmental conditions (temperature, physico-chemical state of radioisotope, and so on) and the biological conditions (feeding habits, species, and so on). Eisenia contaminated by 137Cs and 106Ru-106Rh was fractionated by solvent extraction into 6 fractions. The largest portion of 137Cs was in the boiling water fraction; 106Ru-106Rh was most extracted by 24% KOH solution. Elution patterns by Sephadex G-100 gel-filtration of samples differed largely from each other, both among the 3 kinds of radionuclides and between the 2 species of the algae. Therefore, the accumulation of the radionuclides by the marine algae was proved to be not only due to a physical adsorption to the surface of the algae but also to the biological combining of the radionuclides with the constituents of the algae. Furthermore, it was found that radionuclides which combine with a few constituents of alga are not eliminated equally. This is considered to be useful for the physiological analysis of elimination curves.

著者

長谷 弘記 中村 良一 海老根 東雄 赤池 真 露木 和夫 米田 一平

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.39, no.5, pp.341-349, 1990-10-01

被引用文献数

1

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A study was performed to evaluate the physical exsrcise characterristics of 29 Japanese elite judo athletes by treadmill exercise test. Functional aerobic impairment (FAI), heat rate impairment (HRI) and peripheral circulatory impairment (PCI) in the judo athletes were not significantly different from those of normal sendntary subjects. Howevar, myocardaial aerobic impairment (MAI) was lower than in normal sedentary subjects. %V^O_2max at the anaerobic threahold (AT) was 57.5±3.3% in male, and 57.0±4.3% in female judo athletes. %HRmax at AT was 72.4±3.8% in males, and 75.2±5.3% in females. These findings suggest that functional aerobic capacity and peripheral circulatory function in Japanese elite judo athletes are not significantly different from those of normal sedentary subject, but that judo athletes have high left ventricular function. The blood biochemical profile and urinalysis date revealed that values of muscle injury enzymes plasma uric acid and cholesterol were increased with relatively high freqency in elite judo athletes. Similar data were also obtained in individuals with suspected diabetic nephropathy and rhabdomyolysis.

著者

長谷 弘記 中村 良一 海老根 東雄 露木 和夫 赤池 真

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.38, no.6, 1989-12-01