Scavenging activity against 2,2-diphenyl-a-picrylhydrazyl free radical and interactions of α-tocophenol, oryzanol, and phytosterol
首发时间:2019-01-17
Abstract:Natural antioxidants are a complex system of molecules that interact to scavenge free radicals, and they often exist as minor compounds which are important for the nutritional benefits and functions of plant oils. In this study, the scavenging activity of α-tocopherol (α-T) in the presence of γ-oryzanol and phytosterol in radical medium was investigated. Experimental measurements were performed using 2,2-diphenyl-a-picrylhydrazyl assays. The compounds α-T, γ-oryzanol, and phytosterol were added to the reaction system separately and together at a range of concentrations. Interaction was calculated by comparing experimental and theoretical values. The results revealed an antagonistic interaction between α-T and γ-oryzanol, as well as phytosterol at all concentrations investigated. Additionally, hydrogen bonds and inhibitions of α-T regeneration played important roles in the polar system. These findings provide insight may be of interest in oil processing to ensure that the contents of the minor compounds should be in a suitable range.
keywords: α-tocopherol γ-oryzanol phytosterol antagonism hydrogen bond regeneration
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生育酚、谷维素和植物甾醇清除自由基相互作用
摘要:微量伴随物对植物油的营养功能很重要,它们在清除自由基时可能存在相互作用。本文研究了生育酚与谷维素和植物甾醇清除DPPH自由基的相互作用。将化合物生育酚、谷维素和植物甾醇按照一定浓度加入无水乙醇体系中,通过比较清除自由基的实验值和理论值来计算相互作用。结果显示,在配制的所有浓度下,生育酚和谷维素以及植物甾醇之间存在拮抗作用。这有可能因为在极性体系中,氢键和抑制生育酚重生起重要作用。这些发现为植物油的加工提供理论依据。
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