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Analysis of condensed tannins: a review
Animal Feed Science and Technology, 2001Abstract Plant condensed tannins (proanthocyanidins, PAs) have both positive and negative effects on feed digestibility and animal performance, depending both on the quantity and biological activity of the tannins that are present. In this review, the chemistry and analysis of condensed tannins (PAs) are examined. Our first focus is on the complexity
P Schofield, D.M Mbugua, A.N Pell
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Significance of the Condensed Tannins
1989The condensed tannins are biologically significant natural products primarily because of their ready complexation with proteins. These compounds are particularly important flavor components, being responsible for the astringency of many fruits and vegetable products.
L. J. Porter, R. W. Hemingway
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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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Degradation of condensed tannins byCalvatia gigantea
Applied Microbiology and Biotechnology, 1986Calvatia gigantea, an edible puffball, was grown well on simple phenolic compounds and hydrolysable and condensed tannins as sole carbon sources. A new enzymic system was found to be involved in the degradation of catechin, the building unit of condensed tannins. This enzymic system was induced by catechin and displayed no phenoloxidase activity. Crude
M. Galiotou-Panayotou, B. J. Macris
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Genetic Systems for Condensed Tannin Biotechnology
1999Condensed tannins (proanthocyanidins) are plant phenolic polymers with protein-binding, carbohydrate-binding, and antioxidant properties. Dietary condensed tannins deter some insects from feeding on crops, disrupt insect digestion and growth,1 and deter larger browsing and foraging animals.2 As well, the very high levels of condensed tannins found in ...
Margaret Y. Gruber +12 more
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The condensed tannins (proanthocyanidins) in seagrasses
Aquatic Botany, 1984Abstract In a survey of 29 species in the 12 seagrass genera, those in the Potamogetonaceae that characteristically have tannin cells in the leaves (Posidonioideae: Posidonia; Cymodoceoideae: Halodule, Syringodium, Cymodocea, Thalassodendron, Amphibolis) contained compounds with the Rf values and color reactions typical of condensed tannins.
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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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