Results 171 to 180 of about 3,598 (218)

Anti-inflammatory Hydrolyzable Tannins from Myricaria bracteata

Journal of Natural Products, 2015
Twelve hydrolyzable tannins were obtained from the twigs of Myricaria bracteata, including two new hellinoyl-type dimers, bracteatinins D1 (1) and D2 (2); a new hellinoyl-type trimer, bracteatinin T1 (3); two known monomers, nilotinin M4 (4) and 1,3-di-O-galloyl-4,6-O-(aS)-hexahydroxydiphenoyl-β-d-glucose (5); six known dimers, tamarixinin A (6 ...
Jia-Bao, Liu, Ya-Si, Ding, Ying, Zhang, Jia-Bao, Chen, Bao-Song, Cui, Jin-Ye, Bai, Ming-Bao, Lin, Qi, Hou, Pei-Cheng, Zhang, Shuai, Li   +9 more
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Dietary Intake of Hydrolyzable Tannins and Condensed Tannins to Regulate Lipid Metabolism

Mini-Reviews in Medicinal Chemistry, 2022
Abstract: Lipid metabolism disorder is a multifactor issue, which contributes to several serious health consequences, such as obesity, hyperlipidemia, atherosclerosis diabetes, non-alcoholic fatty liver, etc. Tannins, applied as naturally derived plants, are commonly used in the study of lipid metabolism disease with excellent safety and effectiveness
Chengfu Yuan, Yuming He, Yuanyang Li, Leiqi Zhu, Chong Guo, Mengzhen Xue, Fangqi Xia, Yaqi Wang, Dengke Jia, Luoying Li, Yan Gao, Yue Shi   +11 more
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Polymer structure of commercial hydrolyzable tannins by matrix‐assisted laser desorption/ionization‐time‐of‐flight mass spectrometry

Journal of Applied Polymer Science, 2009
The structures of six commercial hydrolyzable tannins, chestnut, oak, tara, sumach, chinese gall, and turkey gall tannins have been examined by matrixassisted laser desorption/ionization-time-of-flight (MALDI-TOF) mass spectrometry.
A Pizzi, Harald Pasch, K Rode
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Biosynthesis and subcellular distribution of hydrolyzable tannins

Phytochemistry, 2001
Pathways to complex gallotannins have been elucidated by enzyme studies, indicating that beta-glucogallin is required as principal acyl donor. Evidence for the in vitro oxidation of pentagalloylglucose, the pivotal metabolite in this sequence, to ellagitannins, is presented. Immunohistochemical studies with antibodies raised against pentagalloylglucose
P, Grundhöfer, R, Niemetz, G, Schilling, G G, Gross   +3 more
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Chemical Studies of Proanthocyanidins and Hydrolyzable Tannins

Antioxidants & Redox Signaling, 2001
We investigated a number of natural polyphenols representing flavan-3-ols, gallotannins, and ellagitannins with regard to their antioxidant potential. For this purpose we used pulse radiolysis to determine scavenging rate constants with hydroxyl radicals and decay rates of the respective aroxyl radicals and EPR spectroscopy to identify the radicals ...
W, Bors, L Y, Foo, N, Hertkorn, C, Michel, K, Stettmaier   +4 more
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Hydrolyzable Tannins and Related Polyphenols

1995
Recent advances in isolation and structure elucidation of several hundred of new polyphenolic compounds of the tannin class using new techniques (1) have altered the definition of a tannin, at least that of a hydrolyzable tannin. Thus the term tannin now includes all polyphenolic compounds of defined chemical structure as well as the whole group of ...
T, Okuda, T, Yoshida, T, Hatano
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Hydrolyzable tannin analysis in food

Food Chemistry, 2012
The discovery of plant polyphenols in food is perhaps one of the biggest breakthroughs in modern food science. Plant polyphenols are known for their role in food quality and safety, since they contribute significantly to taste, flavour, colour, stability etc., while they are increasingly recognised as important factors in long-term health, contributing
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Oligomeric hydrolyzable tannins from Monochaetum multiflorum

Phytochemistry, 2004
Four hydrolyzable tannins, nobotanins Q, R, S, and T, were isolated from the aqueous acetone extract of the dried leaves of Monochaetum multiflorum (Melastomataceae), a plant indigenous to Colombia. Their dimeric and tetrameric structures were elucidated by spectral and chemical methods.
José H, Isaza, Hideyuki, Ito, Takashi, Yoshida   +2 more
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Lignin-Hydrolyzable Tannin Interactions in Wood

Journal of Agricultural and Food Chemistry, 1997
A series of investigations were carried out to ascertain the relationship between lignin and hydrolyzable tannins in white oak (Quercus alba) and American chestnut (Castanea dentata) milled wood lignins as well as synthetic co-DHPs. Acidolysis and chromatographic analysis of chestnut and white oak milled wood lignins revealed the presence of ellagic ...
Richard F. Helm, Thilini D. Ranatunga, Mudit Chandra   +2 more
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Hydrolyzed Tannins from Geranium pusillum

Chemistry of Natural Compounds, 2003
The polyphenolic compound 1-O-galloyl-3,6-hexahydroxybiphenyl-D-galactopyranoside (pusilagin) was isolated from the aerial part. The tannin structure was established using acid hydrolysis and IR, PMR, and 13C NMR spectral methods.
K. B. Kobakhidze, M. D. Alaniya
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