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 ...

LIM, S. H., DARAH, I. & JAIN, K. 2006. Antimicrobial activities of tannins extracted from Rhizophora apiculata barks. Tannin which was extracted from barks of Rhizophora apiculata was further separated into hydrolysable and condensed tannin. The results of the study revealed that only hydrolysable tannin showed significant antibacterial and antiyeast activities but not antifungal activity. The ...

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...

Excess crude protein (CP) in dairy cow diets is excreted mostly as urea nitrogen (N), which increases ammonia (NH) emissions from dairy farms and heightens human health and environmental concerns. Feeding less CP and more tannin to dairy cows may enhance feed N use and milk production, abate NH emissions, and conserve the fertilizer N value of manure. Lab-scale ventilated chambers were used to ...

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.]...

Using an in vitro cytotoxicity assay based on the release of 51Cr from cultured porcine thoracic aortic and pulmonary arterial endothelial cells, we have demonstrated that cotton bracts tannin is a potent endothelial cell cytotoxin. It produces dose-dependent lethal injury to both types of endothelial cells with the aortic cells being somewhat more sensitive to tannin-mediated injury than the p...

1. The leaf tannin of willow-herb [Chamaenerion angustifolium (L.) Scop.] has been isolated and separated into two fractions of differing solubility. 2. The tannin contains a penta-O-galloyl-beta-d-glucose core to which further galloyl groups are depsidically bound. 3. The unfractionated tannin contains an average of 10.5 galloyl groups/glucose molecule; the soluble fraction has on average 7.6 ...

The aim of this study was to develop a preparation of a hydroalcoholic extract of Quercus infectoria in order to study the physicochemical parameters, and to identify and quantitatively determine the amount of Polyphenols and Tannin in the galls and in the extract. Preparation of an extract rich in Tannin from the galls of Quercus infectoria, as an astringent, can make incorporation into recta...