Widowati, Wahyu and Herlina, Tati and Ratnawati, Hana (2009) The Difference of Antioxidant Activity of Various Tea (Camellia sinensis L.) Methanol Extract. In: The International Conference on Pharmacy and Advanced Pharmaceutical Sciences, 2009, Yogyakarta.
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Abstract
The dried leaves of the plant Camellia sinensis L., is a popular beverage consumed worldwide and contained bioactive compounds. The three main categories of tea are black, green and oolong. Black tea, green tea and oolong tea came from the same tea plant species. The difference is the processing method of tea. Black tea undergoes several hours of oxidation during preparation, oolong tea is partially fermented and green tea is steamed to stop oxidation. This causes different bioactive content. This research was carried out to determine the antioxidant activity of tea methanol extracts. To evaluate various methanol extracts hydroxyl radical scavenging activity (*OH), and superoxide dismutase level (SOD) were used. To know the antioxidant activity of the methanol extract of black tea, green tea and oolong tea were arranged 6 level concentrations respectively 500 μg/mL; 250; 125; 62.5, 31.25 and 15.625 μg/mL and compared to quercetine as positive control. The results showed that oolong tea extract exhibited the highest hydroxyl radical scavenging acitivity at all level concentrations compared to green, black tea extract and quercetine, the highest hydroxyl scavenging activity was methanol extract at level of 500 μg/mL (92.593%). The oolong tea extract had the highest superoxide dismutase level at all level of concentrations compared to green, black tea extract and quercetine, the highest superoxide dismutase level was methanol extract at level of 500 μg/mL (157.067 U/mL).
| Item Type: | Conference or Workshop Item (Paper) |
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| Uncontrolled Keywords: | antioxidant, hydroxyl radical, superoxide dismutase, black tea, green tea, oolong tea |
| Subjects: | R Medicine > R Medicine (General) |
| Depositing User: | Perpustakaan Maranatha |
| Date Deposited: | 28 Mar 2022 07:23 |
| Last Modified: | 28 Mar 2022 07:23 |
| URI: | http://repository.maranatha.edu/id/eprint/30221 |
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