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水溶液中における茶カテキン類とカフェインのクリーミングダウン現象により生じる沈殿の解析(発表論文抄録(2012))
https://fukuyama-u.repo.nii.ac.jp/records/8763
https://fukuyama-u.repo.nii.ac.jp/records/8763f9f702bd-4b57-4bb8-ad4b-fd555ad4d5e7
名前 / ファイル | ライセンス | アクション |
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佐藤隆(発表論文抄録(2012)) (136.7 kB)
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Copyright (c) 2013 by Fukuyama University
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2017-12-20 | |||||
タイトル | ||||||
タイトル | 水溶液中における茶カテキン類とカフェインのクリーミングダウン現象により生じる沈殿の解析(発表論文抄録(2012)) | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Characterization of Creaming Precipitate of Tea Catechins and Caffeine in Aqueous Solution | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | creaming down | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | (−)-epicatechin | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | (−)-epicatechin-3-O-gallate | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | caffeine | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | π–π interaction | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | X-ray crystallographic analysis | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者 |
Sato, Takashi
× Sato, Takashi× Kinoshita, Yoshifumi× Tsutsumi, Hiroyuki |
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著者別名 | ||||||
識別子Scheme | WEKO | |||||
識別子 | 45818 | |||||
姓名 | 佐藤, 隆 | |||||
著者別名 | ||||||
識別子Scheme | WEKO | |||||
識別子 | 45819 | |||||
姓名 | 木下, 吉史 | |||||
著者別名 | ||||||
識別子Scheme | WEKO | |||||
識別子 | 45308 | |||||
識別子Scheme | CiNii ID | |||||
識別子URI | http://ci.nii.ac.jp/nrid/9000243751410 | |||||
識別子 | 9000243751410 | |||||
姓名 | 堤, 広之 | |||||
著者別名 | ||||||
識別子Scheme | WEKO | |||||
識別子 | 45309 | |||||
識別子Scheme | CiNii ID | |||||
識別子URI | http://ci.nii.ac.jp/nrid/9000014625768 | |||||
識別子 | 9000014625768 | |||||
姓名 | 山本, 英二 | |||||
著者別名 | ||||||
識別子Scheme | WEKO | |||||
識別子 | 45110 | |||||
識別子Scheme | CiNii ID | |||||
識別子URI | http://ci.nii.ac.jp/nrid/9000005188259 | |||||
識別子 | 9000005188259 | |||||
姓名 | 石津, 隆 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The content of a crude precipitate formed by creaming, which was made from a catechin mixture and caffeine, was investigated by an integral volume of H-2 proton signals of tea catechins in the 1H-NMR spectrum. Gallated catechins formed a crude precipitate more predominantly than non-gallated catechins. The 2,3-cis-non-gallated catechin (−)-epicatechin (EC) formed a 1 : 1 complex with caffeine, and 2,3-cis-gallated catechin (−)-epicatechin gallate (ECg) formed a 2 : 4 complex with caffeine. The π–π complexation site of EC with caffeine was only the A ring, whereas that of ECg included all aromatic rings, A, B, and B′. It was thought that the hydrophobicity of the 2 : 4 complex of ECg and caffeine was stronger than that of the 1 : 1 complex of EC and caffeine, with the result that the 2 : 4 complex of ECg and caffeine precipitated by creaming more predominantly than the 1 : 1 complex of EC and caffeine in aqueous solution. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | The content of a crude precipitate formed by creaming, which was made from a catechin mixture and caffeine, was investigated by an integral volume of H-2 proton signals of tea catechins in the 1H-NMR spectrum. Gallated catechins formed a crude precipitate more predominantly than non-gallated catechins. The 2,3-cis-non-gallated catechin (−)-epicatechin (EC) formed a 1 : 1 complex with caffeine, and 2,3-cis-gallated catechin (−)-epicatechin gallate (ECg) formed a 2 : 4 complex with caffeine. The π–π complexation site of EC with caffeine was only the A ring, whereas that of ECg included all aromatic rings, A, B, and B′. It was thought that the hydrophobicity of the 2 : 4 complex of ECg and caffeine was stronger than that of the 1 : 1 complex of EC and caffeine, with the result that the 2 : 4 complex of ECg and caffeine precipitated by creaming more predominantly than the 1 : 1 complex of EC and caffeine in aqueous solution. | |||||
書誌情報 |
福山大学薬学部研究年報 en : Annual report of the Faculty of Pharmacy & Pharmaceutical Sciences, Fukuyama University 号 31, p. 25-25, 発行日 2013-12-25 |
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出版者 | ||||||
出版者 | 福山大学薬学部 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0288-724X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN10064550 |