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Reaction of condensed tannins with ammonia
Industrial Crops and Products, 2013Abstract Reaction of condensed (flavonoid) mimosa tannin extracts with concentrated aqueous ammonia has been investigated. For that purpose, catechin was also used as a flavonoid model compound and treated in similar conditions. Solid state CP-MAS 13C NMR and MALDI-ToF spectroscopy studies revealed that, unlike what was recently theorised, amination ...
F. Braghiroli +7 more
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Antinutritional Effects of Condensed and Hydrolyzable Tannins
1992Despite 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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Condensed tannins of pea seeds
Plant Science Letters, 1984Summary Condensed tannins were present in pea testas which contained anthocyanin, but were very much reduced in amount in testas lacking anthocyanin and in cotyledons. Testa tannin was more highly polymerised than that from cotyledons.
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Biogenesis of Condensed Tannins — An Overview
1989There are currently four hypotheses as to how condensed tannins are produced in nature. In order to explain the 2,3-cis configuration of frequently encountered proanthocyanidin polymers, each of these biosynthetic proposals invoke isomerase enzymes or chemical intermediates not yet encountered in nature.
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Interaction of Condensed Tannins with Biopolymers
1989Condensed tannins form complexes with a multitude of species, ranging in size from divalent and trivalent metal ions to macromolecules, both naturally occurring and synthetic. Many of these complexes are of low solubility, permitting detection by techniques as simple as precipitation. Determination of the interactions responsible for the initial events
Luanne F. Tilstra +3 more
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An Overview of Condensed Tannin Structure
1989The proanthocyanidins are an important class of natural products forming the basis for various classes of flavonoid polymers such as the condensed tannins, phlobaphenes, and phenolic acids. Refining our understanding of the structure of polyflavonoids will lead to a better appreciation of their properties and help in developing their use as a renewable
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Diversity of condensed tannins in Vitaceae
2018Diversity of condensed tannins in Vitaceae. 12.
Romieu, Charles +11 more
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