Journal
MOLECULES
Volume 14, Issue 1, Pages 46-52Publisher
MDPI
DOI: 10.3390/molecules14010046
Keywords
Flavonoid; Structure-Activity Relationship; Quantum Chemistry; Antioxidant
Funding
- National Natural Science Foundation of China [20806029]
- Science and Technology Plan of Henan Institute of Science and Technology [7040]
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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: Delta H-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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