Research Article
Effect of Ethanol/Water Solvents on Phenolic Profiles and Antioxidant Properties of Beijing Propolis Extracts
Table 4
Antioxidant properties of different propolis extracts.
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Note: dates are mean ± standard deviation (). Values in the same column followed by the same lowercased letter are not significantly different by Duncan’s Multiple-Range Test (). DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS (2,2-azobis (2-amidinopropane) dihydrochloride) were both expressed as IC50 (concentration of total phenolics able to scavenger 50% of free radicals); ferric reducing/antioxidant power (FRAP) assay was expressed as microgram of Trolox equivalents per milligram of propolis (mg Trolox/mg); oxygen radical absorbance capacity (ORAC) was expressed as micromoles of Trolox equivalents per 100 g propolis (μmol Trolox/100 g) and cell antioxidant activity (CAA) was expressed as IC50. |