title: Polyphenol composition and antioxidant capacity from different extracts of Aster scaber.
abstract: Phenolic contents and antioxidant capacities from different solvent extracts (petroleum ether, ethyl acetate, methanol, butanol and water) of Aster scaber leaf were investigated. Antioxidant activity was evaluated by three different methods, namely DPPH radical scavenging activity, reducing power assay and phosphomolybdenum activity. A total of twenty-three polyphenolic compounds were identified and quantified from A. scaber leaf extracts, including hydroxybenzoic acids, hydroxycinnamic acids, flavonols and other groups of phenolic compounds. Ultra high performance liquid chromatography (UHPLC) analysis of the leaf extract revealed that myricetin (4850.45 μg/g) was the most dominant flavonols, compared to quercetin and kaempferol. Caffeic acid was the dominant phenolic compound in A. scaber leaf extracts, it constituted about 104.20 μg/g, followed by gentisic acid (84.50 μg/g), gallic acid (61.05 μg/g) and homogentisic acid (55.65 μg/g). The total phenolic and flavonoid content was the highest in ethyl acetate extract (322.43 and 6.51 mg/g). The decreasing order of antioxidant activity among the A. scaber leaf extracts assayed through all the three methods was found to be ethyl acetate > butanol > methanol > petroleum ether > water extract.
authors.affiliation: Konkuk University Department of Applied Bioscience, College of Life and Environmental Science Seoul 143 701 South Korea.
authors.forename: M
authors.initials: M
authors.lastname: Thiruvengadam
authors.affiliation: Konkuk University Department of Applied Bioscience, College of Life and Environmental Science Seoul 143 701 South Korea.
authors.forename: N
authors.initials: N
authors.lastname: Praveen
authors.affiliation: Konkuk University Department of Applied Bioscience, College of Life and Environmental Science Seoul 143 701 South Korea.
authors.forename: B R
authors.initials: BR
authors.lastname: Yu
authors.affiliation: Konkuk University Department of Applied Bioscience, College of Life and Environmental Science Seoul 143 701 South Korea.
authors.forename: S H
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Konkuk University Department of Applied Bioscience, College of Life and Environmental Science Seoul 143 701 South Korea.
authors.forename: I M
authors.initials: IM
authors.lastname: Chung
mesh_terms: D000975:Antioxidants / Q000032:analysis*; D031173:Aster Plant / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D008982:Molybdenum / Q000737:chemistry; D010084:Oxidation-Reduction; D010710:Phosphates / Q000737:chemistry; D008517:Phytotherapy; D010851:Picrates / Q000737:chemistry; D018515:Plant Leaves; D028321:Plant Preparations / Q000032:analysis*; D010946:Plants, Medicinal; D059808:Polyphenols / Q000032:analysis*; D012997:Solvents / Q000737:chemistry
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D010710:Phosphates; D010851:Picrates; D028321:Plant Preparations; D059808:Polyphenols; D012997:Solvents; D008982:Molybdenum; C004931:1,1-diphenyl-2-picrylhydrazyl
keywords: Aster scaber; Leafy vegetables; antioxidant activity; flavonoids; phenolic compounds