The present study was performed to investigate antioxidant and antimicrobial activities of Schizandra chinensis Baillon under different extraction conditions. Extraction yield of water extract, 70% ethanol extract, and methanol extract from S. chinensis was 17.7, 32.9, and 36.6% respectively. Total polyphenol content was 9.2-16.3 mg/g in S. chinensis extracts and was increased significantly by ethanol and methanol extraction (p < 0.05). Radical scavenging activity against DPPH and ABTS ·+ was significantly higher in ethanol and methanol extracts than in water extract (p < 0.05). Ethanol and methanol extracts from S. chinensis also showed effective superoxide dismutase-like activity compared with water extract (p < 0.05). S. chinensis water extract exhibited strong antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Salmonella typhimurium, which was increased significantly by ethanol and methanol extraction (p < 0.05). On the other hand, inhibitory effect of S. chinensis water extract on nitric oxide production was more effective than ethanol and methanol extract.
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