Decaffeination of oolong tea infusion by Kieselguhr column chromatography.
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چکیده
منابع مشابه
Polyphenolic Profile and Antioxidant Activities of Oolong Tea Infusion under Various Steeping Conditions
The phenolic profile and antioxidant activities of oolong tea extract were investigated after tea was steeped in 90 or 100 C water for 3 or 10 min. The extraction yield increased with increasing temperature and extended steeping time. However, higher temperature and longer time (100 C water for 10 min) led to loss of phenolics. The aqueous extract of oolong tea (AEOT) at 100 C for 3 min exhibit...
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OBJECTIVE To determine the efficacy of oolong tea for lowering plasma glucose in type 2 diabetic patients in Miaoli, Taiwan. RESEARCH DESIGN AND METHODS A total of 20 free-living subjects who had type 2 diabetes and took hyperglycemic drugs as prescribed were enrolled in the present study. Subjects consumed oolong tea (1,500 ml) or water for 30 days each in a randomized crossover design. Tea ...
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Several column chromatographic methods are available for the separation of aflatoxins (l-6). Most of these procedures are elaborate and involve several steps of purification. A rapid and simple method of obtaining pure aflatoxins was reported by Steyn (5); however, with this method, we were not able to obtain pure crystalline aflatoxins B, and G1 for our experimental studies on animals. When pu...
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Oolong tea is a traditional Chinese tea that has long been believed to be beneficial to health such as decreasing body fat. We were interested in this assertion and tried to evaluate the effect of oolong tea on energy expenditure (EE) in comparison with green tea. The subjects were eleven healthy Japanese females (age 20+/-1 y; body mass index (BMI) 21.2+/-2.5 kg/m2) who each consumed of three ...
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Oolong tea-polymerized polyphenols (OTPP) are characterized polyphenols produced from semi-fermented tea (oolong tea). In the present study, we evaluated the suppressive effects of oolong tea extract and OTPP on postprandial hypertriglyceridemia in rats and mice. Lymphatic recovery of triglycerides in rats cannulated in the thoracic duct was delayed by the administration of oolong tea extract a...
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ژورنال
عنوان ژورنال: Journal of the agricultural chemical society of Japan
سال: 1990
ISSN: 0002-1407,1883-6844
DOI: 10.1271/nogeikagaku1924.64.35