The chestnut tree (Castanea sativa, Mill.) is a widespread plant in Europe whose fruits and wood has relevant economic impact. Chestnut (CW) rich high-value compounds that exhibit various biological activities, such as antioxidant well anticarcinogenic antimicrobial properties. These metabolites can be mainly divided into monomeric polyphenols tannins. In this piece of work, we investigated sus...

The relationship between acid soils and (1) early nodulation in common beans, (2) interstrain competitiveness of Rhizobium leguminosarum bv. phaseoli strains and (3) tannin concentration in roots, were evaluated in two experiments. Ten Phaseolus vulgaris cultivars of different seed tannin content were grown in pots in a greenhouse in soil at pH 4.5 or 5.5, inoculated with equal amounts of strai...

BACKGROUND Tannins are large polyphenolic polymers and are known to bind proteins, limiting their digestibility, but are also excellent antioxidants. Numerous studies investigating the functional properties of sorghum tannin have been conducted by comparing grain samples from different sorghum lines without considering the other intrinsic characteristics of the grain. The purpose of this study ...

The effect of dietary condensed tannins (proanthocyanidins) on rat fecal bacterial populations was ascertained in order to determine whether the proportion on tannin-resistant bacteria increased and if there was a change in the predominant bacterial populations. After 3 weeks of tannin diets the proportion of tannin-resistant bacteria increased significantly (P < 0.05) from 0.3% +/- 5.5% to 25....

Our objective was to determine if condensed tannin extract from quebracho trees (Schinopsis quebracho-colorado; red quebracho) could be used to reduce enteric methane emissions from cattle. The experiment was designed as a repeated 3 x 3 Latin square (4 squares) with 3 treatments (0, 1, and 2% of dietary DM as quebracho tannin extract) and 3 28-d periods. Six spayed Angus heifers (238 +/- 13.3 ...

Grain sorghum silage tannin content effect was evaluated on milk production and chemical composition of Argentinean Holstein bred cows, and it are described dry matter (DM) and crude protein (CP) in situ digestion parameters and effective degradability. The base diet was constituted by alfalfa pasture, maize silage, and a protein – mineral supplement, differing in three treatments based on high...

Cloutier, Michelle M., Craig M. Schramm, and Linda Guernsey. Tannin inhibits the cAMP-b-adrenergic receptor pathway in bovine tracheal epithelium. Am. J. Physiol. 274 (Lung Cell. Mol. Physiol. 18): L252–L257, 1998.—Tannin, isolated from cotton bracts, inhibits chloride secretion in airway epithelium. In bovine tracheal epithelial cells, tannin (25 μg/ml) blunted isoproterenol (Iso)-stimulated a...

Ingestion of small amounts of condensed tannin (CT) by ruminants can prevent bloat, improve nitrogen retention, and reduce excretion of urea, a precursor of ammonia and the greenhouse gas nitrous oxide. Because grasses and many forbs don’t contain CT, it is desirable to find a reliable way to have ruminant livestock ingest small amounts of CT when they consume high-quality forage. Putting CT in...

Tannins, polyphenolic compounds found in plants, are known to complex with proteins of feed and rumen bacteria. This group of substances has the potential to reduce methane production either with or without negative effects on digestibility and microbial yield. In the first step of this study, 10 tannin-rich extracts from chestnut, mimosa, myrabolan, quebracho, sumach, tara, valonea, oak, cocoa...