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Effect of extraction conditions on measured total polyphenol contents and antioxidant and antibacterial activities of black tea
(2007)
Black tea was extracted for 2, 8 and 18 h with absolute acetone, N,N-dimethylformamide (DMF), ethanol and methanol and their 50% aqueous solutions. The extracts were screened for total polyphenol contents, antioxidant and ...