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Updated: Jun 26, 2026

Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
Published on: August 14, 2019
Structure-activity relationship of flavonoids active against lard oil oxidation based on quantum chemical analysis
Ji-Guo Yang1, Ben-Guo Liu, Gui-Zhao Liang
1College of Light Industry and Food Science, South China University of Technology, Guangzhou 510640, P R China. yjgscut@263.net
Abstract:
In this study, the antioxidant activities of 15 flavonoids against lard oil oxidation were determined by using the Rancimat test. Quercetin, dihydromyricetin, luteolin and kaempferol showed the strongest antioxidant activity, with protection factor values (PF) of 11.50, 11.29, 4.24 and 2.49, respectively. The role of conjugated hydroxyl groups of the B and C ring is discussed. By using the following descriptors: DeltaH(f) (the difference in heat of formation between flavonoids and their free radicals resulted after hydrogen atom donation) and H(BC) (the number of conjugated hydroxyl groups of the B and C ring), the result obtained in the antioxidant Rancimat test could be successfully explained.
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