Results 191 to 200 of about 46,017 (234)

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
openaire   +2 more sources

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.
Antonio Pizzi, Harald Pasch, S Giovando
exaly   +2 more sources

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
openaire   +3 more sources

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
openaire   +1 more source

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
openaire   +1 more source

Protein-tannins binding mode in hydrolyzable tannins-induced protein aggregation

Food Chemistry
Because the interaction between proteins and tannins is complex, the mode of binding has not yet been elucidated. Elucidating this interaction has been considered impossible to accomplish, especially in water, in which proteins retain their three-dimensional (3D) structure. In this study, a combination of molecular dynamics (MD) simulations of multiple
Mana, Yoshimura, Yoshiki, Sugahara, Kana, Nagase, Miho, Kobayashi, Yuji O, Kamatari, Kosei, Yamauchi   +5 more
openaire   +2 more sources

Cytotoxic Hydrolyzable Tannins from Balanophora japonica

Journal of Natural Products, 2008
Four hydrolyzable tannins named balanophotannins D-G ( 1- 4) were isolated from the aerial parts of the parasitic plant Balanophora japonica. Their structures were characterized on the basis of spectroscopic and chemical evidence. Balanophotannins D-G contain an oxidized hexahydroxydiphenoyl (HHDP) group. The absolute configurations of balanophotannins
Zhi-Hong, Jiang, Xiao-Yun, Wen, Takashi, Tanaka, Shao-Yu, Wu, Zhongqiu, Liu, Hiromi, Iwata, Yoko, Hirose, Shuguang, Wu, Isao, Kouno   +8 more
openaire   +2 more sources

Antitumor-promoting activities of hydrolyzable tannins in mouse skin

Carcinogenesis, 1992
Ellagic acid and gallic acid and its derivatives, applied topically to female CF-1 mice 20 min before each 12-O-tetradecanoylphorbol-13-acetate (TPA) treatment inhibit the inductions of epidermal ornithine decarboxylase activity, hydroperoxide production and DNA synthesis caused by this potent tumor promoter in relation with their abilities to inhibit ...
H U, Gali, E M, Perchellet, D S, Klish, J M, Johnson, J P, Perchellet   +4 more
openaire   +2 more sources

Antinutritional Effects of Condensed and Hydrolyzable Tannins

1992
Despite major structural differences, hydrolyzable and condensed tannins often produce similar antinutritional effects. The most common effects are diminished weight gains and lowered efficiency of nutrient utilization. The major biochemical basis for these effects appears not to be inhibition of dietary protein digestion but rather a systemic ...
openaire   +2 more sources

Hydrolyzed Tannins of Euphorbia glareosa Leaves. Structure of Glarein C

Chemistry of Natural Compounds, 2000
The structure of glarein, a new hydrolyzed tannin from Euphorbia glareosa Pall. ex Bieb. leaves, was established using physicochemical properties of the compound itself, its hydrolysis products, and IR, UV, and PMR spectra.
L. N. Gvazava, M. D. Alaniya
openaire   +1 more source