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

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
小野 敦史 細矢 光亮 鈴木 奈緒子 木下 英俊 村井 弘通 前田 亮 菅野 修人 大原 信一郎 陶山 和秀 川崎 幸彦
出版者
一般社団法人 日本小児腎臓病学会
雑誌
日本小児腎臓病学会雑誌 (ISSN:09152245)
巻号頁・発行日
vol.30, no.2, pp.159-163, 2017

<p>前立腺囊胞性疾患は,外表奇形の合併がない場合,幼少期に発見されることは稀な疾患である。今回我々は,尿路感染症を契機に画像検査で偶発的に発見された前立腺小室囊胞の1 例を経験した。症例は1 歳男児。発熱と排尿時の啼泣,異常な尿臭を主訴に当科を受診した。膿尿の他,腹部の造影CT 検査と造影MRI 検査で膀胱と直腸の間に長径約40 mm の囊胞性病変を認めた。抗菌薬による治療で尿路感染症は改善し,その後の膀胱尿道鏡検査で前立腺小室囊胞と診断された。抗菌薬の予防投与で経時的に囊胞は縮小し,画像検査で確認できなくなったため,外科的切除は行っていない。現在,予防内服中止から1 年以上経過したが,再発は認めていない。小児の尿路感染症では,しばしば尿路異常を合併する例があるため,発症時には腎尿路系の精査を行うことも多い。自験例のように,前立腺小室囊胞が尿路感染症の合併症の1 つとして関与することを念頭に置く必要がある。</p>