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epicatechin 3 o gallate/kamelija
Nuoroda įrašoma į mainų sritį
Puslapis 1 nuo 34 rezultatus
Separation of polyphenols and caffeine from the acetone extract of fermented tea leaves (Camellia sinensis) using high-performance countercurrent chromatography.
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Leaves from Camellia sienensis are a popular natural source of various beverage worldwide, and contain caffeine and polyphenols derived from catechin analogues. In the current study, caffeine (CAF, 1) and three tea polyphenols including (-)-epigallocatechin 3-O-gallate (EGCg, 2), (-)-gallocatechin
Metabolism of green tea catechins by the human small intestine.
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Numerous studies have shown that green tea polyphenols can be degraded in the colon, and there is abundant knowledge about the metabolites of these substances that appear in urine and plasma after green tea ingestion. However, there is very little information on the extent and nature of intestinal
Potential anthelmintics: polyphenols from the tea plant Camellia sinensis L. are lethally toxic to Caenorhabditis elegans.
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A novel gallate of tannin, (-)-epigallocatechin-(2 beta-->O-->7',4 beta-->8')-epicatechin-3'-O-gallate (8), together with (-)-epicatechin-3-O-gallate (4), (-)-epigallocatechin (5), (-)-epigallocatechin-3-O-gallate (6), and (+)-gallocatechin-(4 alpha-->8')-epigallocatechin (7), were isolated from the
Stereoselective oxidation at C-4 of flavans by the endophytic fungus Diaporthe sp. isolated from a tea plant.
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The microbial transformation of five flavans (1-5) by endophytic fungi isolated from the tea plant Camellia sinensis was investigated. It was found that the endophytic filamentous fungus Diaporthe sp. oxidized stereoselectively at C-4 position of (+)-catechin (1) and (-)-epicatechin (2) to give the
Antioxidative activity of green tea treated with radical initiator 2, 2'-azobis(2-amidinopropane) dihydrochloride.
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This study investigated the antioxidative activity of green tea extract, and a green tea tannin mixture and its components, under conditions of radical generation using the hydrophilic azo compound, 2,2'-azobis(2-amidinopropane) dihydrochloride (AAPH) to generate peroxyl radicals at a constant and
The Influence of In Vivo Metabolic Modifications on ADMET Properties of Green Tea Catechins-In Silico Analysis.
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The health effects of green tea are associated with catechins: (-)-epigallocatechin-3-O-gallate (EGCG), (-)-epigallocatechin, (-)-epicatechin-3-O-gallate, and (-)-epicatechin. An understanding of compound absorption, distribution, metabolism, excretion, and toxicity characteristics is essential for
Postprandial glycaemia-lowering effect of a green tea cultivar Sunrouge and cultivar-specific metabolic profiling for determining bioactivity-related ingredients.
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Although the major green tea catechins can inhibit the activity of carbohydrate-hydrolyzing enzymes, there is a paucity of information describing the potential of other green tea ingredients and numerous green tea cultivars. Herein, we reveled that a green tea cultivar Sunrouge significantly
The impact of the 67kDa laminin receptor on both cell-surface binding and anti-allergic action of tea catechins.
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Here, we investigated the structure-activity relationship of major green tea catechins and their corresponding epimers on cell-surface binding and inhibitory effect on histamine release. Galloylated catechins; (-)-epigallocatechin-3-O-gallate (EGCG), (-)-gallocatechin-3-O-gallate (GCG),
Effects of a component of green tea on the proliferation of vascular smooth muscle cells.
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The effects of a component of green tea on the proliferation of smooth muscle cells were measured in terms of [3H]thymidine uptake. When green tea tannin mixture was added to the medium of cultured smooth muscle cells, it suppressed the proliferation of the cells dose-dependently. Similarly to the
Green tea polyphenols: novel and potent inhibitors of squalene epoxidase.
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The green tea gallocatechins, (-)-epigallocatechin-3-O-gallate (EGCG) (IC(50) = 0.69 microM), (-)-gallocatechin-3-O-gallate (GCG) (IC(50) = 0.67 microM), (-)-epicatechin-3-O-gallate (ECG) (IC(50) = 1.3 microM), and theasinensin A (IC(50) = 0.13 microM), were found to be potent and selective
Beta-cyclodextrin/surface plasmon resonance detection system for sensing bitter-astringent taste intensity of green tea catechins.
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To develop a methodology for creating a sensor with a receptor for specific taste substances, we focused on constructing a sensing system for the bitter-astringent taste intensity of green tea catechins: (-)-epigallocatechin-3-O-gallate (EGCg), (-)-epicatechin-3-O-gallate (ECg), (-)-epigallocatechin
Development of rapid and simultaneous quantitative method for green tea catechins on the bioanalytical study using UPLC/ESI-MS.
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A rapid and quantitative analytical method for the simultaneous determination of green tea catechins using ultra-performance liquid chromatography/electrospray ionization-mass spectrometry was developed. Total analytical run time was 3.5 min for the detection of (-)-epicatechin (EC),
Epimerization of tea catechins and O-methylated derivatives of (-)-epigallocatechin-3-O-gallate: relationship between epimerization and chemical structure.
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Epimerization at C-2 of O-methylated catechin derivatives and four major tea catechins were investigated. The epimeric isomers of (-)-epicatechin (I), (-)-epicatechin-3-O-gallate (II), (-)-epigallocatechin (III), (-)-epigallocatechin-3-O-gallate (IV), and (-)-epigallocatechin-3-O-(3-O-methyl)gallate
Quantitative comparison of cancer and normal cell adhesion using organosilane monolayer templates: an experimental study on the anti-adhesion effect of green-tea catechins.
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The main constituent of green tea, (-)-Epigallocatechin-3-O-gallate (EGCG), is known to have cancer-specific chemopreventive effects. In the present work, we investigated how EGCG suppresses cell adhesion by comparing the adhesion of human pancreatic cancer cells (AsPC-1 and BxPC-3) and their
A difference between epigallocatechin-3-gallate and epicatechin-3-gallate on anti-allergic effect is dependent on their distinct distribution to lipid rafts.
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The high-affinity IgE receptor FcepsilonRI expresses on the cell surface of mast cells and basophils, which is the key molecule in allergic reactions. We previously found that the major green tea catechin, (-)-epigallocatechin-3-O-gallate (EGCG), has the suppressive effect of the FcepsilonRI
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