{"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}
引用次数: 11
Abstract
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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