Results 221 to 230 of about 30,400 (253)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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.
openaire +1 more source
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 ...
openaire +2 more sources
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
openaire +1 more source
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.
openaire +1 more source