Results 181 to 190 of about 3,598 (218)

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
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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
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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
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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

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 ...
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ChemInform Abstract: Hydrolyzable Tannins and Related Polyphenols

ChemInform, 1996
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
T. OKUDA, T. YOSHIDA, T. HATANO
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Combreglutinin, a Hydrolyzable Tannin from Combretum glutinosum

Journal of Natural Products, 1994
Combreglutinin [4], a hydrolyzable tannin, was isolated from the leaves of Combretum glutinosum, and its macrocyclic structure was established on the basis of 1 H- and 13 C-nmr and 2D nmr spectroscopic data and by chemical methods. The three known tannins 2,3-(S)-hexahydroxydiphenoyl-D-glucose [1], punicalin [2], and punicalagin [3] were also ...
Akino Jossang, Jean-Louis Pousset, Bernard Bodo   +2 more
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Enzymes in the Biosynthesis of Hydrolyzable Tannins

1992
The two classes of hydrolyzable tannins (i.e., gallotannins and ellagitan-nins) have long been postulated to originate from 1,2,3,4,6-pentagalloyl-glucose as their common precursor. The biosynthesis of this pivotal ester was studied with enzymes from oak and sumac leaves. β-Glucogallin (l-O-galloyl-β-D-glucose), the first intermediate of this metabolic
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The methanogenic toxicity and anaerobic degradability of a hydrolyzable tannin

Water Research, 1987
Abstract Gallotannic acid was found to be highly toxic to methanogenic activity. Concentrations, representing 50% inhibition, approximated 700 mg l−1. The toxicity was persistent despite the rapid degradation of gallotannic acid to volatile fatty acids and methane.
J.A. Field, G. Lettinga
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Preparation of antibodies against hydrolyzable plant tannins

Phytochemical Analysis, 1998
Polyclonal antibodies were raised against covalently protein-coupled 1,2,3,4,6-pentagalloylglucose, the common and immediate precursor of the two subclasses of hydrolyzable tannins, i.e. the polyphenolic gallotannins and ellagitannins. The crude antisera were efficiently purified by affinity-chromatography on pentagalloylglucose-substituted Sepharose ...
Daniela Kaspar, Petra Grundhöfer, Georg G. Gross   +2 more
openaire   +1 more source