{"title":"α-生育酚自由基在乙醇溶液中的脉冲辐射分解机理研究","authors":"Daniel Jore , L.K. Patterson , C. Ferradini","doi":"10.1016/S0748-5514(86)80043-5","DOIUrl":null,"url":null,"abstract":"<div><p>Pulse radiolytic studies of α-tocopherol (αTH) oxidation-reduction processes were carried out with low doses (5 Gy) of high-energy electrons in O<sub>2−</sub>, N<sub>2−</sub>, and air-saturated ethanolic solutions. Depending on the concentration of oxygen in solution, two different radicals, A· and B·, were observed. The first, A·, was obtained under N<sub>2</sub> and results from aTH reaction with solvated electron (<em>k</em><sub>aTH+c<sub>solv</sub><sup>−</sup></sub> = 3.4 × 10<sup>8</sup> mol<sup>−1</sup> liter s<sup>−1</sup>) and with H<sub>3</sub>C-ĊH-OH, (R·) (<em>k</em><sub>aTH + R·</sub> = 5 × 10<sup>5</sup> mol<sup>−1</sup> liter s<sup>−1</sup>). B·, observed under O<sub>2</sub>, is produced by αTH reaction with RO<sub>2</sub> peroxyl radicals (<em>k</em><sub>a</sub>TH + RO<sub>2</sub><sup>.</sup> = 9.5 × 10<sup>4</sup> mol<sup>−1</sup> liter s<sup>−1</sup>).</p></div>","PeriodicalId":77737,"journal":{"name":"Journal of free radicals in biology & medicine","volume":"2 5","pages":"Pages 405-410"},"PeriodicalIF":0.0000,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0748-5514(86)80043-5","citationCount":"11","resultStr":"{\"title\":\"Pulse radiolytic study of α-tocopherol radical mechanisms in ethanolic solution\",\"authors\":\"Daniel Jore , L.K. Patterson , C. Ferradini\",\"doi\":\"10.1016/S0748-5514(86)80043-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Pulse radiolytic studies of α-tocopherol (αTH) oxidation-reduction processes were carried out with low doses (5 Gy) of high-energy electrons in O<sub>2−</sub>, N<sub>2−</sub>, and air-saturated ethanolic solutions. Depending on the concentration of oxygen in solution, two different radicals, A· and B·, were observed. The first, A·, was obtained under N<sub>2</sub> and results from aTH reaction with solvated electron (<em>k</em><sub>aTH+c<sub>solv</sub><sup>−</sup></sub> = 3.4 × 10<sup>8</sup> mol<sup>−1</sup> liter s<sup>−1</sup>) and with H<sub>3</sub>C-ĊH-OH, (R·) (<em>k</em><sub>aTH + R·</sub> = 5 × 10<sup>5</sup> mol<sup>−1</sup> liter s<sup>−1</sup>). B·, observed under O<sub>2</sub>, is produced by αTH reaction with RO<sub>2</sub> peroxyl radicals (<em>k</em><sub>a</sub>TH + RO<sub>2</sub><sup>.</sup> = 9.5 × 10<sup>4</sup> mol<sup>−1</sup> liter s<sup>−1</sup>).</p></div>\",\"PeriodicalId\":77737,\"journal\":{\"name\":\"Journal of free radicals in biology & medicine\",\"volume\":\"2 5\",\"pages\":\"Pages 405-410\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1986-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0748-5514(86)80043-5\",\"citationCount\":\"11\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of free radicals in biology & medicine\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0748551486800435\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of free radicals in biology & medicine","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0748551486800435","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11
摘要
采用低剂量(5 Gy)高能电子在O2−、N2−和空气饱和乙醇溶液中进行了α-生育酚(αTH)氧化还原过程的脉冲辐射分解研究。根据溶液中氧浓度的不同，可以观察到两种不同的自由基A·和B·。第一个是在N2条件下得到的A·，这是aTH与溶剂化电子(kaTH+csolv−= 3.4 × 108 mol−1 l s−1)和H3C-ĊH-OH (R·)(kaTH+ R·= 5 × 105 mol−1 l s−1)反应的结果。在O2条件下，α - th与RO2过氧自由基(kaTH + RO2)反应生成B·。= 9.5 × 104 mol−1 l s−1)。
Pulse radiolytic study of α-tocopherol radical mechanisms in ethanolic solution
Pulse radiolytic studies of α-tocopherol (αTH) oxidation-reduction processes were carried out with low doses (5 Gy) of high-energy electrons in O2−, N2−, and air-saturated ethanolic solutions. Depending on the concentration of oxygen in solution, two different radicals, A· and B·, were observed. The first, A·, was obtained under N2 and results from aTH reaction with solvated electron (kaTH+csolv− = 3.4 × 108 mol−1 liter s−1) and with H3C-ĊH-OH, (R·) (kaTH + R· = 5 × 105 mol−1 liter s−1). B·, observed under O2, is produced by αTH reaction with RO2 peroxyl radicals (kaTH + RO2. = 9.5 × 104 mol−1 liter s−1).
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