Scavenging activity against 2,2-diphenyl-a-picrylhydrazyl free radical and interactions of α-tocophenol, oryzanol, and phytosterol

Lisha Zhang; Tao Zhang; Ming Chang; Mengyao Lu; Ruijie Liu; Qingzhe Jin; Xingguo Wang

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Scavenging activity against 2,2-diphenyl-a-picrylhydrazyl free radical and interactions of α-tocophenol, oryzanol, and phytosterol

Lisha Zhang,Tao Zhang,Ming Chang,Mengyao Lu,Ruijie Liu *,Qingzhe Jin,Xingguo Wang

Synergetic Innovation Center of Food Safety and Nutrition, International Joint Research Larboratory for Lipid Nutrition and Safety, School of Food Science and Technology

*Correspondence author

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Funding: National Natural Science Foundation of China （No.31872895）, National First-class Discipline Program of Food Science and Technology（No.JUFSTR20180202）

Opened online:17 January 2019

Accepted by: none

Citation: Lisha Zhang,Tao Zhang,Ming Chang.Scavenging activity against 2,2-diphenyl-a-picrylhydrazyl free radical and interactions of α-tocophenol, oryzanol, and phytosterol[OL]. [17 January 2019] http://en.paper.edu.cn/en_releasepaper/content/4747013

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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