Results 291 to 300 of about 46,558 (333)

Proanthocyanidins ofPolygonum coriarium III. Structures of proanthocyanidins T1 and T2

Chemistry of Natural Compounds, 1997
The roots ofPolygonum coriarum have yielded two oligomeric proanthocyanidins, T1 and T2, and their structures have been established: 3-O-galloyl-7-O-[O-(6-O-galloyl)-β-D-glucopyranosyl]-(−)-epigallocatechin-(4β-8)-(−)-epicatechin-(4β-8)-(−)-epicatechin-(4β-8)-(−)-epigallocatechin 3-O-gallate (T1) and (−)-epicatechin-(4β-8)-[3-O-galloyl ...
Z. A. Kuliev, A. A. Nishanov, A. B. Makhmatkulov, N. D. Abdullaev, A. D. Vdovin, B. M. Keneshov   +5 more
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Proanthocyanidins ofPolygonum coriarium. IV. Structures of proanthocyanidins T3 and T4

Chemistry of Natural Compounds, 1997
Two oligomeric proanthocyanidins have been isolated from the roots ofPolygonum coriarium. By a study of their physical properties and spectral characteristics and analysis of the results of chemical transformations, the chemical structures of these compounds have been established as: (−)-epicatechin-77[O-β-D-glucopyranosyl]3\(\xleftarrow{6}\) O-²-D ...
N. D. Abdullaev, A. D. Vdovin, B. M. Keneshov, A. A. Nishanov, Z. A. Kuliev   +4 more
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Protective Effect of Proanthocyanidins in a Rat Model of Mild Intestinal Inflammation and Impaired Intestinal Permeability Induced by LPS

Molecular Nutrition & Food Research, 2019
SCOPE Intestinal dysfunction consists of a defective barrier function, which allows the influx of luminal endotoxins, thus causing intestinal inflammation. Proanthocyanidins are natural bioactive compounds that could modulate intestinal dysfunction. This
Katherine Gil-Cardoso, Raffaella Comitato, I. Ginés, A. Ardévol, Montserrat Pinent, F. Virgili, X. Terra, M. Blay   +7 more
semanticscholar   +1 more source

Proanthocyanidins of Rhodiola semenovii [PDF]

Chemistry of Natural Compounds, 1991
The structures of two compounds previously isolated fromRhodiola semenovii, rhodokhinoside (I) and rhodikhim (II), have been established.
M. R. Yagudaev, A. D. Vdovin, Kim Khvan Khi, V. M. Malikov, Z. A. Kuliev   +4 more
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Phytochemistry of proanthocyanidins

Phytochemistry, 1975
Abstract Procyanidin A from Aesculus hippocastanum differs from the B type procyanidin in that it is difficultly soluble in water, gives a higher yield of cyanidin when heated in butanolic HCl and the production of cyanidin continues beyond the 2 hr period sufficient for maximum production in the case of B type procyanidin. Anthocyanidin production
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Flavans and proanthocyanidins

1988
Haslam’s previous accounts of this area of flavonoid chemistry (Haslam, 1975, 1982a) eloquently summarized the historical developments in the chemistry and biochemistry of this important and complex group of plant phenolics. Also covered were their relationship with condensed tannins and aspects of their characteristic chemical and spectroscopic ...
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Proanthocyanidins in Hops

2009
Liquid chromatography–tandem mass spectrometry (LC/MSn) coupled with various two-dimensional NMR methods are among the most practical approaches for analyzing proanthocyanidins from hops. Using these and other analytical approaches, it has been shown that hops contain a preponderance of polymeric material, including proanthocyanidins which are dominant,
Max L. Deinzer, Hui-Jing Li
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Bioavailability of red wine and grape seed proanthocyanidins in rats.

Food & Function, 2020
This study explored plasma levels and urinary and fecal excretion of metabolites and microbial-derived catabolites over a 24 h period following the ingestion of red wine (RWP) or grape seed (GSP) proanthocyanidin-rich extracts by rats.
G. Pereira-Caro, S. Gaillet, J. L. Ordóñez, P. Mena, L. Bresciani, K. Bindon, D. Del Rio, J. Rouanet, J. Moreno-Rojas, A. Crozier   +9 more
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The nature of the complex proanthocyanidins

Phytochemistry, 1969
Preliminary separation of the complex proanthocyanidins has been made possible by solvent fractionation using ethyl acetate and ethyl acetate containing ethyl alcohol. Subsequent paper chromatographic separation has yielded good results in the estimation of individual components.
H.A.B. Parpia, A.G. Mathew, V.S. Govindarajan   +2 more
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Rootstock effects on grape anthocyanins, skin and seed proanthocyanidins and wine color and phenolic compounds from Vitis vinifera L. Merlot grapevines.

The Journal of the Science of Food and Agriculture, 2019
BACKGROUND Rootstocks affect vegetative and reproductive parameters of the scion. However, limited knowledge exists on the effects of the adoption of a specific rootstock on grape and wine phenolic composition, which contribute to certain sensory ...
G. Gutiérrez-Gamboa, E. Gómez‐Plaza, A. Bautista-Ortín, T. Garde-Cerdán, Y. Moreno-Simunovic, A. Martínez-Gil   +5 more
semanticscholar   +1 more source