篇名 | 臺灣蜂膠乙醇萃出物之抗菌與清除DPPH自由基活性 |
---|---|
卷期 | 11:4 |
並列篇名 | Antibacterial and DPPH Free Radical-scavenging Activities of the Ethanol Extract of Propolis Collected in Taiwan |
作者 | 盧立章 、 陳裕文 、 周正俊 |
頁次 | 277-282+354 |
關鍵字 | 蜂膠乙醇萃出物 、 抗菌活性 、 DPPH自由基清除活性 、 熱穩定性 、 Ethanolic extract of propolis 、 Antibacterial and DPPH free radical-scavenging activity 、 Thermal stability 、 MEDLINE 、 Scopus 、 SCIE |
出刊日期 | 200312 |
In the present study, ethanolic extracts of propolis (EEP) collected from various regions (Taipei, Mingchen and Fangliao) in Taiwan during different time periods (June, August and October-November, 2000) were tested for their antibacterial and antioxidative activities. In addition, the thermal stabilities of these activities exerted by EEP were also investigated. It was found that the EEP samples, depending on collecting location and time period, exerted various antioxidative activities in terms of scavenging α,α-diphenyl-2-piorylhydrasyl (DPPH) free radicals and showed various extents of antibacterial activity against Staphylococcus aureus and Listeria monocytogenes, but not against Escherichia coli and Salmonella typhimurium. In general, the Taiwanese propolis extract collected in June showed the most profound antibacterial and free radical-scavenging activities than those collected during other time periods. Among all of the samples tested, EEP collected from the Mingchien area in June exhibited the highest antibacterial activity, while that collected from the Taipei area during the same time period showed the highest free radical-scavenging activity. Further tests of EEP collected from Taipei in June revealed that its DPPH free radical-scavenging effects reduced significantly after heating at 50, 80 or 100ûC for 1 hr, while its antibacterial activity remained unchanged.