Kinetic Study of the Quenching Reaction of Singlet Oxygen by α-, β-, γ-, δ-Tocotrienols and Palm Oil and Soybean Extracts in Solution
Kinetic Study of the Quenching Reaction of Singlet Oxygen by α-, β-, γ-, δ-Tocotrienols and Palm Oil and Soybean Extracts in Solution
复制标题
α-、β-、γ-、δ-生育三烯酚与棕榈油和大豆提取物在溶液中猝灭单线态氧反应的动力学研究
DOI：
10.1080/09168451.2014.943653
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and T. Koike
中科院分区：
文献类型：
--
作者：
K. Mukai;E. Ishikawa;A. Ouchi;S. Nagaoka;T. Suzuki;K. Izumisawa;and T. Koike
对 11 种抗氧化剂 (AO)（八种维生素 E 同系物（α-、β-、γ-和 δ-生育酚和-生育三烯酚（-Tocs 和 -Toc-3s））、两种维生素 E 的单线态氧 (1O2) 猝灭速率 (kQ(S)) 和相对单线态氧吸收能力 (SOAC) 值进行了测量 代谢物（α-和γ-羧乙基-6-羟基苯并二氢吡喃）和trolox）在乙醇/氯仿/D2O（50:50:1，v/v/v）和乙醇溶液中于35°C。对五种棕榈油提取物 1-5 和一种大豆提取物 6 进行了类似的测量，其中包含不同浓度的 Tocs、Toc-3s 和类胡萝卜素。此外，还测定了提取物 1-6 中包含的 Tocs、Toc-3s 和类胡萝卜素的浓度 (wt%)。结果表明，提取物 1-6 获得的 1O2 猝灭速率 (kQ(S))（即相对 SOAC 值）可以解释为速率常数 (kQAO-i(S)) 与 AO-i(Tocs，Tocs， 包括 Toc-3s 和类胡萝卜素）。
Measurements of the singlet oxygen (1O2) quenching rates (kQ(S)) and the relative singlet oxygen absorption capacity (SOAC) values were performed for 11 antioxidants (AOs) (eight vitamin E homologues (α-, β-, γ-, and δ-tocopherols and -tocotrienols (-Tocs and -Toc-3s)), two vitamin E metabolites (α- and γ-carboxyethyl-6-hydroxychroman), and trolox) in ethanol/chloroform/D2O (50:50:1, v/v/v) and ethanol solutions at 35 °C. Similar measurements were performed for five palm oil extracts 1–5 and one soybean extract 6, which included different concentrations of Tocs, Toc-3s, and carotenoids. Furthermore, the concentrations (wt%) of Tocs, Toc-3s, and carotenoids included in extracts 1–6 were determined. From the results, it has been clarified that the1O2-quenching rates (kQ(S)) (that is, the relative SOAC value) obtained for extracts 1–6 may be explained as the sum of the product {ΣkQAO-i(S) [AO-i]/100} of the rate constant (kQAO-i(S)) and the concentration ([AO-i]/100) of AO-i(Tocs, Toc-3s, and carotenoid) included.