Results 221 to 230 of about 97,820 (249)

Hydrolyzable Tannins and Related Polyphenols fromEucalyptus globulus

Journal of Asian Natural Products Research, 2000
Eucaglobulin (1), a new complex of gallotannin and monoterpene, was isolated from the leaves of Eucaloptus globulus. Its structure was elucidated on the basis of spectral data. Four known hydrolyzable tannins [tellimagrandin I (2), eucalbanin C (3), 2-O-digalloyl-1,3,4-tri-O-galloyl-beta-D-glucose (4), 6-O-digalloyl-1,2,3-tri-O-galloyl-beta-D-glucose ...
A J, Hou, Y Z, Liu, H, Yang, Z W, Lin, H D, Sun   +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

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

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

Hydrolyzable Tannins having a Depsidone-forming Valoneoyl Group

HETEROCYCLES, 1990
The orientation of the valoneoyl group in praecoxins C and D as in the structures of praecoxins C and D was unequivocally proved by the 1 H- 13 C long-range shift correlation spectrum of rugosin C which was chemically correlated with praecoxin ...
Takuo Okuda, Tsutomu Hatano, Osamu Namba, Ling Chen, Taeko Yasuhara, Kazufumi Yazaki, Takashi Yoshida   +6 more
openaire   +1 more source

Identification of UDP glucosyltransferases from the aluminum-resistant tree Eucalyptus camaldulensis forming β-glucogallin, the precursor of hydrolyzable tannins.

Phytochemistry, 2018
In the highly aluminum-resistant tree Eucalyptus camaldulensis, hydrolyzable tannins are proposed to play a role in internal detoxification of aluminum, which is a major factor inhibiting plant growth on acid soils.
Ko Tahara, M. Nishiguchi, A. Frolov, Juliane Mittasch, C. Milkowski   +4 more
semanticscholar   +1 more source

Supplementing growing rabbit diets with chestnut hydrolyzable tannins: Effect on meat quality and oxidative status, nutrient digestibilities, and content of tannin metabolites.

Meat Science, 2018
The study investigated the effect of dietary inclusion of chestnut hydrolyzable tannin (CHT) in growing rabbit diets on nutrients digestibility, quality and oxidative status of meat, and content of tannin metabolites. At weaning, rabbits were assigned to
A. Dalle Zotte, M. Cullere, G. Tasoniero, Z. Gerencsér, Z. Szendrő, E. Novelli, Z. Matics   +6 more
semanticscholar   +1 more source

Gallic Acid Derivatives and Hydrolyzable Tannins

1989
Gallic acid and its derivatives as they occur in extracts of oak-galls constitute a chemical reagent of considerable antiquity. The blue-black color produced when an aqueous infusion is treated with salts of iron was first described by Pliny; its use in the analysis of mineral waters and as a component of invisible ink were noted as early as the ...
openaire   +1 more source

Correlation of oxidative transformations of hydrolyzable tannins and plant evolution

Phytochemistry, 2000
The progressive oxidative transformations in the biogenesis of hydrolyzable tannins, gallotannin (I) --> ellagitannin (II) --> dehydro ellagitannin (III) --> transformed dehydroellagitannin (IV), conform in several aspects to the evolutionary routes in the subclasses of Dicotyledonae, particularly in the Rosidae.
T, Okuda, T, Yoshida, T, Hatano
openaire   +2 more sources