Demand for tea is increasingly driven by its reported antioxidative properties. To ascertain such efficacy, the antioxidative activity (AA) of freshly brewed commercially available full-leaf white, green, oolong, and black tea was determined using a dynamic method. Various amounts (w/v) of tea were brewed at different temperatures for a constant period of time. The AA was calculated based on the ability of the brew to quench hydroxyl-radicals as quantified by chemiluminescence detection. Black tea had the strongest radical scavenging ability followed by green tea. Their AA was far greater than those of the other two types of tea tested. This efficacy finally eroded on serial dilution to a tea concentration of 0.15625 X 10-4 g/mL. The significant data clearly substantiate the sound premise that tea, particularly black tea, is unique in its dramatic ability to counter the adverse onslaught of radicals that are known contributors to human morbidity and mortality.
| Identifer | oai:union.ndltd.org:MSSTATE/oai:scholarsjunction.msstate.edu:td-5745 |
| Date | 11 May 2013 |
| Creators | Sreenivasan, Shreepriya |
| Publisher | Scholars Junction |
| Source Sets | Mississippi State University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | Theses and Dissertations |
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