Production and HPLC analysis of black tea theaflavins and thearubigins during in vitro oxidation
β Scribed by Alastair Robertson; Derek S. Bendall
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 582 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0031-9422
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Thirty-three Argentinian black tea samples of three grades (BOP, BOPF and PF) obtained fortnightly were examined for their theaflavin ( T F ) , thearubigin ( T R ) and total and extractable caffeine contents during the 1985 186 season. Total and extractable caffeine contents decreased gradually duri
It has been shown that the theaΓavins and thearubigin hump of decaffeinated aqueous extracts of black tea remain virtually stable for up to 850 min, thus permitting their automated overnight analysis. Within-run coefficients of variation for the total chromatogram area and peak area for each of the
Theaflavin-2 (TF-2), a major component of black tea extract, induces apoptosis of human colon cancer cells and suppresses serum-induced cyclooxygenase-2 (COX-2) expression [1]. Here, we explored the mechanisms for activation of apoptosis, evaluated the impact on inflammatory genes in a broader panel