Antioxidative properties of Martynoside: Pulse radiolysis and laser photolysis study
文献类型：期刊论文
| 作者 | Miao, JL ; Wang, WF（王文峰） ; Yao, S（姚思德） ; Navaratnam, S ; Parsons, BJ |
| 刊名 | FREE RADICAL RESEARCH
 |
| 出版日期 | 2003 |
| 卷号 | 37期号:8页码:829 |
| ISSN号 | 1071-5762 |
| 英文摘要 | Free radical reactions of Martynoside (MAR), a phenylpropanoid glycoside, with a variety of oxidants were studied in the aqueous solution by laser photolysis and pulse radiolysis techniques. The pK(a) value of MAR in aqueous solution was measured from the pH dependent changes of the UV absorption at 384 run with value of pK(a) = 9.2. The phenoxyl radical of MAR which exhibits maximum absorption at 360 nm was generated by one-electron transfer to N-3(.) or Br-2(.-). Other important properties of phenoxyl radical such as extinction coefficient, formation and decay rate constants were also determined. The reaction rate constant of O-2(.-) with MAR, k = 8.5 x 10(4) dm(3) . mol(-1) . s(-1), was measured by the method of competition kinetics. By measuring time-resolved luminescence emission at 1270 nm, the quenching rate constant of singlet oxygen by MAR was obtained to be 3.3 x 10(6) dm(3) . mol(-1) . s(-1). Reduction potential of the MAR couple (MAR(.) /MAR), determined using rutin as reference compound, gave a value E=0.66V vs. NHE. The antioxidative properties of MAR were compared with those of some well-known antioxidants. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000184427500005 |
| 公开日期 | 2012-09-25 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/9868]  |
| 专题 | 上海应用物理研究所_中科院上海原子核所2003年前 |
| 推荐引用方式 GB/T 7714 | Miao, JL,Wang, WF,Yao, S,et al. Antioxidative properties of Martynoside: Pulse radiolysis and laser photolysis study[J]. FREE RADICAL RESEARCH,2003,37(8):829. |
| APA | Miao, JL,Wang, WF,Yao, S,Navaratnam, S,&Parsons, BJ.(2003).Antioxidative properties of Martynoside: Pulse radiolysis and laser photolysis study.FREE RADICAL RESEARCH,37(8),829. |
| MLA | Miao, JL,et al."Antioxidative properties of Martynoside: Pulse radiolysis and laser photolysis study".FREE RADICAL RESEARCH 37.8(2003):829. |
入库方式： OAI收割
来源：上海应用物理研究所
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