Premium
Composition of Flavonoids and Phenolic Acids in Lychee ( Litchi Chinensis Sonn.) Flower Extracts and Their Antioxidant Capacities Estimated with Human LDL, Erythrocyte, and Blood Models
Author(s) -
Chen Y.C.,
Lin J.T.,
Liu S.C.,
Lu P.S.,
Yang D.J.
Publication year - 2011
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1750-3841.2011.02164.x
Subject(s) - chemistry , flavonoid , antioxidant , acetone , hemolysis , food science , ethanol , composition (language) , dpph , chromatography , biochemistry , biology , linguistics , philosophy , immunology
Lychee ( Litchi chinensis Sonn.) flower is a major nectar source in Taiwan. Antioxidant activities of acetone, ethanol, and hot‐water extracts of the flower were estimated through three biochemical models: inhibition of Cu 2+ ‐induced oxidation of human low‐density lipoprotein, scavenging ability of oxygen radicals in human blood, and inhibition of human erythrocyte hemolysis induced by peroxyl radicals. Composition and content of flavonoids and phenolic acids in these extracts were also determined by high‐performance liquid chromatography. Results showed that antioxidant effects of all test models as well as contents of flavonoids and phenolic acids for the lychee flower extracts were in the order: acetone extract > ethanol extract > hot‐water extract. Gentistic acid and epicatechin were the major phenolic acid and flavonoid in the extracts, respectively.