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Antioxidant Activities of Extracts from Ophiopogon japonicus

Wang Zhaojing (Department of Bioengineering and Biotechnology,Huaqiao University,Quanzhou 362021,China)  
The ethanol soluble extracts,water soluble extracts and alkali extracts were obtained from the Ophiopogon japonicus by ethanol-cireumfluence extraction,boiling-water extraction and alkali extraction. On the basis of superoxide radical assay and hydroxyl radical assay,their antioxidant activities were investi- gated.Among them,alkali extracts and water soluble extracts had higher inhibitory activities than that of Vc for hydroxyl radical.In addition,alkali extracts has higher inhibitory activity of superoxide radical than Vc at low concentration.The ethanol-soluble extracts had remarkable antimicrobial activities for Bacillus subti- lis Cohn,and the MIC was lmg/mL.E.coli and Candida glycerolgenesis can be strongly inhibited by water soluble extracts,at the MIC 9.7mg/mL and 6.5mg/mL respectively.
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