查詢結果分析
相關文獻
- Antibacterial and DPPH Free Radical-scavenging Activities of the Ethanol Extract of Propolis Collected in Taiwan
- Antibacterial Activity of Propolis Ethanol Extract Against Streptococcus Mutans as Influenced by Concentration, Temperature, pH and Cell Age
- Activity of Cefepime Compared with Other Antibiotics Against Gram-Positive Bacteria and Cefuroxime-Resistant Gram-Negative Bacteria
- 真鰺碎魚肉中肌紅蛋白及色澤的熱穩定性
- 棉纖維與Nomex纖維混紡織物熱穩定性分析
- 火力電廠氣渦輪機高溫油泥問題解決案例--含新油開發及水冷卻效率計算
- Benzalkonium chloride之抗菌力效果試驗
- 具側鏈雜環聚尿素--醯亞胺共聚合體之合成
- 具多機能性聚氨基甲酸聚合體
- 耐熱性聚醯胺--醯亞胺纖維合成之研究
頁籤選單縮合
題名 | Antibacterial and DPPH Free Radical-scavenging Activities of the Ethanol Extract of Propolis Collected in Taiwan=臺灣蜂膠乙醇萃出物之抗菌與清除DPPH自由基活性 |
---|---|
作者 | 盧立章; 陳裕文; 周正俊; | 書刊名 | 藥物食品分析 |
卷期 | 11:4 2003.12[民92.12] |
頁次 | 頁277-282+354 |
分類號 | 341.91 |
關鍵詞 | 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; |
語文 | 英文(English) |
中文摘要 | 本實驗係採用台農秈19號 (秈米) 及台中糯70號 (精米) 米澱粉為試驗材料,探討球磨處理對破損米澱粉理化特性之影響。連續糊化黏度分析顯示,在同一球磨時間下,台農秈19號之成糊溫度、最高黏度、崩壞度及最終黏度之下降程度皆較台中糯70號米澱粉顯著,相似之現象亦見於示差掃描熱分析之糊化尖峰溫度、吸熱焓值及X-ray繞射分析之波峰強度。然而,兩品種米澱粉之粒徑中央值,卻皆隨球磨時間增長而顯著升高 (p<0.05) 。偏極光顯微觀察發現破損澱粉失去十字複曲折性,顯示其澱粉顆粒結構受到破壞並破損。掃描式電子顯微結果顯示,球磨處理後米澱粉顆粒變形且表面較粗糙,並會相互聚集而使粒徑增大,兩品種皆然。整體而言,台農秈19號未澱粉之理化特性及顆粒結構受球磨處理之影響較台中糯70號為大。 |
英文摘要 | 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 100uC for 1 hr, while its antibacterial activity remained unchanged. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。