Antioxidant Activities Of Several Chinese Edible And Medicinal Herbs

In this study, antioxidant activities and antioxidant contents of the water and ethanol extracts of Cynanchum bungei Decne., C. auriculatum Royle ex Wight, Portulaca oleracea Linn., Talinum paniculatum (Jacp.) Gaerth.,shanyao and lingyuzi were evaluated, supplying some foundation for the exploring of natural free radical scavenger.1 Antioxidant compontents and antioxidant activityEthanol extracts of C. bungei and C. auriculatum showed higher total phenolic contents than that of each extract of C. bungei and C. auriculatum, and ethanol extract of C. auriculatum showed the highest total phenolic contents and four acetophenones.Ethanol extracts of P. oleracea, T. paniculatum, shanyao and lingyuzi showed both higher total phenolic contents and total flavonoid contents than their water extracts.2 The antioxidant activities of C. bungei and C. auriculatum Between the ethanol extracts of C. auriculatum and C. bungei, ethanol extract of C. auriculatum exhibited the highest scavenging activities in 2,2.-azinobis-(3-ethylbenzthiazoline-6-sulfonicacid) diammoniumsalt (ABTS), ferric reducing/antioxidant power (FRAP) and non-enzymatic lipid peroxidation of liver homogenates assays than the ethanol extract of C. bungei, and lower scavenging activities on superoxide anion radical scavenging activity, hydroxyl anion radical scavenging activity andβ-carotene bleaching inhibition activity. Between the ethanol extracts of C. auriculatum and C. bungei, water extract of C. auriculatum exhibited the highest scavenging activities in ABTS and non-enzymatic lipid peroxidation of liver homogenates assays than the water extract of C. bungei, and the water extract of C. bungei exhibited higher antioxidant activities in FRAP,β-carotene bleaching, superoxide anion radical scavenging and hydroxyl anion radical scavenging assays.3 The antioxidant activities of P. oleracea and T. paniculatumBetween the ethanol extracts of P. oleracea and T. paniculatum, the ethanol extract of T. paniculatum exhibited higher antioxidant activities in ABTS, FRAP,β-carotene bleaching and non-enzymatic lipid peroxidation of liver homogenates assays than the ethanol extract of T. paniculatum, and the ethanol extract of T. paniculatum showed higher effective scavenging activities on both superoxide anion radical and hydroxyl anion radical. Between the water extracts of P. oleracea and T. paniculatum, the water extract of T. paniculatum exhibited higher antioxidant activities in ABTS, FRAP,β-carotene bleaching assay, and the water extract of T. paniculatum showed higher effective scavenging activities on both superoxide anion radical and hydroxyl anion radical and higher inhibition activities on lipid peroxidation of liver homogenates.4 The antioxidant activities of shanyao and lingyuziBetween the ethanol extracts of shanyao and lingyuzi, ethanol extract of lingyuzi exhibited higher antioxidant activities in in ABTS, FRAP,β-carotene bleaching assays than the ethanol extract of shanyao, and they had little difference on scavenging superoxide anion radical and hydroxyl anion radical. Between the water extracts of shanyao and lingyuzi, extract of lingyuzi exhibited higher activities in all the antioxidant test systems including ABTS, ferric reducing/antioxidant power, superoxide radical and hydroxyl radical scavenging, and inhibition of lipid peroxidation induced by Fe2+/ascorbate in rat liver homogenate.