Antioxidant and Antibacterial Activity of Commercially Available Herbs in Korean Markets
2010
Chae, I.G., Keimyung University, Daegu, Republic of Korea | Kim, H.J., Keimyung University, Daegu, Republic of Korea | Yu, M.H., Keimyung University, Daegu, Republic of Korea | Kim, H.I., Keimyung University, Daegu, Republic of Korea | Lee, I.S., Keimyung University, Daegu, Republic of Korea
In this study, we investigated the antioxidant and antibacterial activity of methanol extracts from 6 plants which were Chrysanthemum zawadskii Herb. var. latilobum (Maxim.) Kitamura (Gu-jeol-cho), Lavandula spica L. (Lavender), Rosmainus offcinals L. (Rosemary), Cymbopogon citrates (Lemongrass), Saussureae radix Mok-hyang), Calendular officinalis L. (Calendular). Antioxidative effects of herbal extracts were measured by polyphenols, flavonoids contents and DPPH radical scavenging activity assay. We also evaluated the antibacterial activity against Staphylococcus aureus and Escherichia coli O157:H7. Methanol extracts from Gu-jeol-cho, lavender, rosemary and lemongrass showed high polyphenols contents as well as strong DPPH scavenging activity. In particular, rosemary extract contained highest polyphenol levels as 126.69±2.62 ㎍/mg compared to other herbs. As for DPPH radical scavenging activities, IC∧50 values of rosemary extracts were 6.23±0.58 ㎍/mL. The rosemary extracts also showed higher antibacterial effects against S. aureus and E. coli O157:H7. These results indicate that rosemary could be used as natural antioxidant and antibacterial agents.
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