查詢結果分析
相關文獻
- Correlation of Major Components and Radical Scavenging Activity of Commercial Tea Drinks in Taiwan
- 市售罐裝茶飲料中兒茶素類及咖啡因含量之分析
- 茶飲料成分分析方法之研究
- 液相層析法分析茶飲料中兒茶素
- High Performance Liquid Chromatographic Determination of Sodium Saccharin, Caffeine, Aspartame and Sodium Benzoate in Tea Drinks
- 室內萎凋靜置時間對包種茶製茶過程中兒茶素類成分與咖啡因含量變化之影響
- The Effects of Catechin on Superoxide Dismutase Activity and Its Gene Expression in Pheochromocytoma Cells
- 兒茶素抑制葡萄糖攝取及降血糖之效應
- 茶類飲料中咖啡因及其他添加物之定性分析
- 以甘蔗汁製造機能性低聚果糖及其在混合果汁飲料上之應用
頁籤選單縮合
題名 | Correlation of Major Components and Radical Scavenging Activity of Commercial Tea Drinks in Taiwan=臺灣市售茶飲料主要成份與清除自由基活性之相關性 |
---|---|
作者 | 吳佳娟; 江孟燦; 張毅偉; 陳佳音; 楊惠婷; 李宗貴; 林佳璇; 姚賢宗; | 書刊名 | Journal of Food and Drug Analysis |
卷期 | 19:3 2011.09[民100.09] |
頁次 | 頁289-300+378 |
分類號 | 412.37 |
關鍵詞 | 茶飲料; 兒茶素; 清除自由基; 糖; 咖啡因; Tea drinks; Catechins; Free radical scavenging; Sugar; Caffeine; |
語文 | 英文(English) |
英文摘要 | ABSTRACT Correlation of major components with free radical scavenging activities of 27 commercial tea drinks prepared from green, Oolong, and black teas in Taiwan were investigated. Green tea drinks contained the highest level of total catechins including epigallocatechin gallate (EGCG), epigallocatechin (EGC), epicatechin (EC), epicatechin gallate (ECG), and gallocatechin gallate (GCG), while these components were low in black tea drinks and moderate in Oolong tea drinks. EGC and EGCG were the major catechins in the three types of tea drinks, and gallic acid showed the highest abundance in black tea drinks. Caffeine concentrations were comparable in the three types of tea drinks. All black tea drinks contained sugars, and sucrose was the main sweetener added. The scavenging abilities against 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) radicals were used to determine the antioxidant potential of tea drinks, and the ranked order of potency was green tea > Oolong tea > black tea. Total phenolics, total catechins, and EGC of tea drinks were positively and significantly (r > 0.8) correlated to the scavenging abilities against DPPH and ABTS radicals. Our results show that green tea drinks have higher free radical scavenging activity than black and Oolong tea drinks may be related to their high levels of total phenolics and catechins. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。