Evaluation of antioxidant properties of the different tissues of vine tea (Ampelopsis grossedentata) in stripped canola oil and sunflower oil

Journal of Food Science
Caihua JiaXiaohua Li

Abstract

The leaves of Ampelopsis grossedentata have a long history of use as a health tea and herbal medicine. Data on the distribution of active metabolites in, and antioxidant capacities of, different vine tea tissues remain incomplete. The aim of this work was to investigate the content of metabolites from A. grossedentata different tissues and evaluate the antioxidant capacities of the extraction of the species in vitro and in oil systems: canola oil and sunflower oil. To evaluate the degree of lipid oxidation, the peroxide value (POV) and thiobarbituric acid-reactive substance value (TBARS) were determined, and proton nuclear magnetic resonance (1 H-NMR) was performed. The results revealed a high total flavonoid content in each of the four extractions (>580 mg/g dried weigh). Leaf extractions exhibited higher antioxidant ability, followed by fruit extract and butylated hydroxytoluene (BHT). The POVs of oils bearing extracts of A. grossedentata and BHT maintained less than 21.08 meq/kg oil against to control with 1,406.33 ± 52.63 meq/kg oil on day 32 in canola oil, and 27.87 meq/kg oil comparing to 1,892.96 ± 48.63 meq/kg oil in control on day 24 in sunflower oil. Concurring results were also obtained in TBARS and 1 H-NMR analysis....Continue Reading

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