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アイテム
Oxidation Potentials of Antioxidative Flavonoids and the Radical-Scavenging Abilities
https://repo.qst.go.jp/records/67687
https://repo.qst.go.jp/records/67687d357f77d-bfb8-440c-8a3c-be7e90f5f0d5
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2003-12-18 | |||||
| タイトル | ||||||
| タイトル | Oxidation Potentials of Antioxidative Flavonoids and the Radical-Scavenging Abilities | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Nakanishi, Ikuo
× Nakanishi, Ikuo× Miyazaki, Kentaro× Ohkubo, Kei× Urano, Shiro× Ueda, Junichi× Hakamata, Wataru× Okuda, Haruhiro× Ozawa, Toshihiko× Fukuzumi, Shunichi× Fukuhara, Kiyoshi× Ikota, Nobuo× 中西 郁夫× 上田 順市× 小澤 俊彦× 伊古田 暢夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The rate of hydrogen transfer from (+)-catechin, a planar catechin derivative, or quercetin to cumylperoxyl radical was accelerated significantly in the presence of scandium triflate in oxygen-saturated propipnitrile at 203 K. This indicates that the hydrogen-transfer reaction proceeds via an initial electron transfer from (+)-catechin, planar catechin, or quercetin to cumylperoxyl radical to produce the corresponding radical cation and cumylperoxylate anion followed by proton transfer. The second-harmonic alternting current voltammograms (SHACV) were recorded for the flavonoids to estimate their one-electron oxidation potentials in acetonitrile containing 0.1 M tetrabutylammonium perchlorate at 298 K. The more negatively shifted the oxidation potential, the faster the hydrogentransfer reaction becomes. On the other hand, no effect of scandium triflate was observed on the rate of hydrogen transfer from luteolin or kaempferol, which proceeds via onestep hydrogen atom transfer rather than electron transfer. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 10th Annual Meeting of the Society for Free Radical Biology and Medicine | |||||
| 発表年月日 | ||||||
| 日付 | 2003-11-24 | |||||
| 日付タイプ | Issued | |||||
