Fresh fruits are rich sources of polyphenolic compounds. The polyphenolics present in plant sources are known to have beneficial effects, especially in the prevention of cardio-vascular diseases, cancer, etc. Therefore, the consumption of fresh fruits is not only associated with vitamin supplementation, but also serves as an effective preventive agent for many diseases. The polyphenolic compoun...

Tannins are plant-derived polyphenols with antimicrobial effects. The mechanism of tannin toxicity towards Escherichia coli was determined by using an extract from Acacia mearnsii (Black wattle) as a source of condensed tannins (proanthocyanidins). E. coli growth was inhibited by tannins only when tannins were exposed to oxygen. Tannins auto-oxidize, and substantial hydrogen peroxide was genera...

Eleven fungal strains (4 Penicillium commune, 2 Aspergillus niger, 2 Aspergillus rugulosa, Aspergillus terricola, Aspergillus ornatus and Aspergillus fumigatus) were isolated, characterized morphologically and by their capacity to degrade tannins. Aspergillus niger Aa-20 was used as control strain. Several concentrations of hydrolysable tannin (tannic acid) were used as sole carbon source. All ...

Condensed tannins can be found in various parts of many plants. Unlike lignin there has been little study of their fate as they enter the soil organic matter pool and their influence on nutrient cycling, especially through their protein-binding properties. We extracted and characterized tannin-rich fractions from humus collected in 1998 from a black spruce [Picea mariana (Mill.) Britton et al.]...

Astringency is a major sensory property and plays an important role in the overall quality of juice wines. A contributor to astringency condensed tannins, which can precipitate with salivary glycoproteins. And thus, it vital develop methods measure tannin accurately. Recently, interest application assays has been increasing various fields. Condensed broadly include determination concentration, ...

Tannins have a number ofdetrimental biological effects and these include interference with normal growth and metabolism if they are present in the feed of various animals. Proline-rich proteins (PRPs) in saliva have been shown to provide protection against tannin, but little is known about the mechanism of protection and interaction of other salivary proteins with tannin. To identify tannin-bin...

Anthocyanins and condensed tannins are major flavonoid end-products in higher plants. While the transactivation of anthocyanins by basic helix-loop-helix (bHLH) transcription factors is well documented, very little is known about the transregulation of the pathway to condensed tannins. The present study analyses the effect of over-expressing an Sn transgene in Lotus corniculatus, a model legume...

Novel valorization routes for tannins were opened by the development of a simple, straightforward, robust, and flexible approach to selective functionalization condensed hydrolyzable tannins. Irrespective different degrees polymerization, commercial efficiently functionalized generation an ether linkage bound short linker carrying desired functional group. Functionalizations could be realized a...

Cotton dusts contain condensed tannins and endotoxins, which are suspected of contributing to the development of acute and chronic biological responses in some cotton textile mill workers. Condensed tannin extracted from cotton dust was coated on to cellulose powder, and the tannin coated powder was treated with an alkali solvent system previously developed to reduce the endotoxin content and p...