Fig. 1. Free radical scavenging activity of MeOH, HX, DCM and EA fractions of Alnus firma by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method.
Fig. 2. Superoxide anion radical scavenging activity of MeOH, HX, DCM and EA fractions of Alnus firma by PMS/ NADH-NBT method.
Fig. 3. Antioxidant activities of Alnus firma extracts using the β-carotene linoleate model system. L-ascorbic acid and BHA were used as positive controls.
Fig. 4. Reducing power of MeOH, HX, DCM, EA and BuOH fractions of Alnus firma.
Fig. 5. Inhibition of lipid peroxidation of Alnus firma extracts. Ferric thiocyanate (FTC) method was used for determination of lipid peroxidation.
Fig. 6. Metal chelating effect of organic solvent-fractions of Alnus firma.
Table 1. Extraction yields, total phenolic contents, total flavonoid contents, total antioxidant contents and total reducing power in crude Alnus firma extracts
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