著者
松浦 正憲 加藤 優 犀川 陽子 乾 公正 橋本 貴美子 中田 雅也
出版者
天然有機化合物討論会
雑誌
天然有機化合物討論会講演要旨集
巻号頁・発行日
no.50, pp.415-420, 2008-09-01

Accidental ingestion of a toadstool, Russula subnigricans causes lethal poisoning to human. In the 1950's, the first poisoning caused by this mushroom was reported. Since then there have been no reports about lethal poisoning for 50 years, which was enough to raise doubts about its existence. However, in these three years, 2005 to 2007, the poisoning accidents were continuously happened and four people died. Although chemical studies on this fungus were reported using mushrooms distributed in Miyagi prefecture, the isolated compounds, russuphelins, russupherol, and hydroxybaikiain, have no toxicity on mouse. Accordingly, we studied the isolation of the toxic constituent of R. subnigricans. One of the reasons that such a strong toxin has not been revealed until now is the incomplete classification of this mushroom, that is, there are many resemble species distributed in Japan. We collected three species in Kyoto, Miyagi, and Saitama prefectures. The aforementioned compounds were found only in the Miyagi species. All three species show toxicity on mouse by intraperitoneal injection of the water extract; however, only the Kyoto species exhibits toxicity by oral injection. Accordingly, we estimated that the Kyoto species is the genuine R. subnigricans. During the separation steps, we found that the toxicity was remarkably decreased after concentration to dryness; therefore, all manipulations were carefully performed. The water extract was successively separated through ODS column chromatography, ion exchange chromatography, and gel filtration to give an aqueous solution of the toxic compound. The toxic compound was revealed to be unstable under concentration to dryness (polymerization occurs) and volatile, which was turned out to be the cause of decrease in toxicity after evaporation. The unstable toxin was converted to a stable derivative using diphenyldiazomethane. Taking ^1H, ^<13>C NMR and MS spectral analyses of the toxic compound and its derivative into consideration, the structure of the toxic compound was determined to be cycloprop-2-ene carboxylic acid. This compound was found only in the Kyoto species.
著者
林 農 加藤 優 田川 公太朗 原 豊
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集 B編 (ISSN:03875016)
巻号頁・発行日
vol.74, no.740, pp.841-849, 2008-04-25 (Released:2011-08-16)
参考文献数
11
被引用文献数
1

In recent years, the wind turbines have been installed actively and the suitable sites of wind farm have been decreased on land. On the other hand, a lot of wind energy resources are latent and it is expected that wind power will be installed in the future on the sea. This study aims to establish a measurement method of wind characteristics using a small ship for decision of suitable site for offshore wind power. We constructed the wind measurement system, which is composed of an ultrasonic anemometer, a differential GPS (DGPS) and an inertial measurement unit. The system was installed to a small ship and wind characteristics at 10 m height above the sea surface were measured by an ultrasonic anemometer on the Sea of Japan close to Tottori prefecture. Raw data of the wind velocity obtained in the proposed method includes the error caused by the pitching, rolling and yawing of the ship. In this study, the raw data of wind velocity was corrected by the data of the DGPS and the inertial measurement unit. Conclusively, the raw wind velocity contaminated by the oscillation and cruising of the ship was corrected and the wind velocity maps were obtained.
著者
成田 伸 大原 良子 鈴木 幸子 遠藤 俊子 齋藤 益子 吉沢 豊予子 野々山 未希子 水流 聡子 跡上 冨美 矢野 美紀 西岡 啓子 加藤 優子 森島 知子 齋藤 良子 角川 志穂 段ノ上 秀雄 黒田 裕子 工藤 里香
出版者
自治医科大学
雑誌
基盤研究(B)
巻号頁・発行日
2007

望まない妊娠や性感染症罹患の予防を専門的に支援する避妊・性感染症予防カウンセラー育成プログラムを構築した。プログラムは6日間の集合教育と専用のウエブサイトを活用した自己学習からなり、2008年度と2009年度の2回にわたって助産師を対象に開催した。育成プログラムの成果を評価するために、受講者と非受講の比較群で学習成果を比較した結果、受講者に知識の増加や態度の変容がみられた。また受講者のカウンセリング能力が向上した。今後は、育成されたカウンセラーの実践自体を評価する研究が必要である。
著者
阿部良行 中村 雅登 加藤 優子 小川 純一 井上 宏司 多田 伸彦
出版者
日本肺癌学会
雑誌
肺癌 (ISSN:03869628)
巻号頁・発行日
vol.32, pp.279-284, 1992
被引用文献数
15

症例は56才男性.胸部異常陰影を指摘され, 肺癌の術前診断で, 左下葉切除・リンパ節郭清術施行(病理診断:大細胞癌, T2NlM0).術後6ヵ月, 急性腹症で緊急入院し, 諸検査で肺癌の副腎転移が疑われた.はっきりした感染がないにもかかわらず, 白血球数は21, 800/μlと異常高値を示した.疼痛軽減を目的に腹部腫瘤摘出術施行し, 病理学的に肺癌の転移と診断された.術直後, 白血球数は低下傾向を示したが, 再上昇し, 術後23日目に腫瘍死した.死亡直前の白血球数は46, 500/μlであった.血清中の顆粒球コロニー刺激因子(G-CSF)は146pg/ml(正常<60)と高値を示し原発巣および転移巣の腫瘍組織より抽出したRNAをノザンブロット法で解析し, 両者にG-CSFのmRNAの発現を認めた.本症例では, 腫瘍細胞での自律的なG-CSF遺伝子の発現と血清中へのG-CSFの過剰分泌が分子生物学的に証明され, 白血球増多症に対する腫瘍産生性G-CSFの関与が明らかにされた.