Results 211 to 220 of about 16,811 (259)
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Determination of tea catechins
Journal of Chromatography A, 2000An overview of analytical methods for the measurement of biologically important tea catechins is presented. Liquid chromatography and capillary electrophoresis are the most cited techniques for catechin separation, identification and quantitation.
J J, Dalluge, B C, Nelson
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THE ESTIMATION AND SIGNIFICANCE OF CATECHIN AND DIMERIC CATECHIN IN BEER
Journal of the Institute of Brewing, 1975A gas-liquid chromatographic method for the estimation of monomeric and dimeric catechin in beer is described. This method has been used to estimate the concentrations of these compounds in a number of beers, which were found to contain 0·5 to 8·0 ppm of monomeric catechin and up to 22·0 ppm of dimeric catechin.
J. D. McGuinness +3 more
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World Journal of Microbiology & Biotechnology, 1993
An enzyme capable of cleaving catechin was present in the mycelium ofCheatomium cupreum. Maximum synthesis of the enzyme occurred after 15 days growth. Sucrose and maltose increased enzyme synthesis among the carbon sources tested. Catechol, protocatechuic acid and phloroglucinol carboxylic acid were the intermediates of catechin degradation.Cheatomium
T, Sambandam, A, Mahadevan
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An enzyme capable of cleaving catechin was present in the mycelium ofCheatomium cupreum. Maximum synthesis of the enzyme occurred after 15 days growth. Sucrose and maltose increased enzyme synthesis among the carbon sources tested. Catechol, protocatechuic acid and phloroglucinol carboxylic acid were the intermediates of catechin degradation.Cheatomium
T, Sambandam, A, Mahadevan
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A seco-catechin cyclization approach to 4→6-linked catechin dimers
Chem. Commun., 2014A viable approach for the selective synthesis of the 4→6-linked catechin dimers is described. The regioselective union of an acyclic catechin precursor (seco-catechin) and an electrophilic catechin unit was achieved. Subsequent pyran cyclization constructed the requisite 4→6-linked dimeric structure.
Watanabe, G., Ken OHMORI, Suzuki, K.
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Die Bestimmung von Catechin und Catechin‐Gerbstoff in Gambir
Recueil des Travaux Chimiques des Pays-Bas, 1939„Die Gewinnung von Gambir aus den Blättern von Uncaria Gambir Roxb. und die Gebrauchsanwendungen dieses Stoffes werden besprochenDie Qualitätsbeurteilung von Gambir wird erörtert und eine Übersicht der hauptsächlichsten Methoden gegeben, um Catechin und Catechin‐Gerbstoff nebeneinander zu bestimmen.Die Trennung von Catechin und Catechin‐Gerbstoff ...
C. J. van Hulssen, D. R. Koolhaas
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Interaction of catechins with aluminum in vitro
Journal of Zhejiang University-SCIENCE A, 2004Tea is one of the most popular beverages, consumed by over two thirds of the world's population; but the aluminum accumulation property of tea plant is becoming the focus of many researches because of aluminum's known adverse effect on human health.
De-song, Tang +4 more
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Catechin Transformation As Influenced by Aluminum
Journal of Agricultural and Food Chemistry, 2005Polyphenols (catechins) are vital biomolecules in tea plants (Camellia sinensis), which are well-known as typical Al accumulators. However, the interaction between Al and catechin remains obscured. The objective of the present study was to investigate the effect of Al on the transformation of (+)-catechin. Solutions with OH/Al molar ratios of 2.5 (pH 5.
Chen, Y. M., Wang, M. K., P. M. Huang
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Stereospecificity in membrane effects of catechins
Chemico-Biological Interactions, 2001Green tea catechins consisting of catechin stereoisomers and their derivatives have been suggested to show biological activities through the interactions with cellular membranes. Their effects on membrane fluidity were comparatively studied by measuring fluorescence polarization of liposomal membranes prepared with phospholipids and cholesterol.
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Isolation of Catechin and Catechin Glycoside from Indigofera welwitschii (Fabaceae)
BIMA JOURNAL OF SCIENCE AND TECHNOLOGY GOMBEProper phytochemical investigations of medicinal plants derived constituent has become of paramount importance owing to their versatile application as lead molecules in conventional medicine and as herbal medicine traditional practices. Indigofera welwitschii is not an exception. It belongs to genus Indigofera belongs and family fabaceae (Leguminaceae)
A. Muntaka, A. Sansi
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