Six plant sources of hydrolyzable tannins (HT) or HT and condensed tannins (CT; designated as HT1, HT2, HT3, HT + CT1, HT + CT2, and HT + CT3) were evaluated to determine their effects in vitro on CH(4) production and on ruminal archaeal and protozoa populations, and to assess potential differences in biological activities between sources containing HT only or HT and CT. Samples HT1, HT2, and H...

Condensed tannins were quantified in the barks of selected tree species, and antibacterial activity these substances against clinical subclinical isolates bovine mastitis evaluated. Tree from Mimosa tenuiflora, caesalpiniifolia, Anacardium occidentale, Stryphnodendron adstringens used, as well commercial tannin Acacia mearnsii. The extracted using a mixture ethyl alcohol acetone. moisture conte...

Environmental stresses not only influence production of plant metabolites but could also modify their resorption during leaf senescence. The production-resorption dynamics of polyphenolic tannins, a class of defense compound whose ecological role extends beyond tissue senescence, could amplify the influence of climate on ecosystem processes. We studied the quantity, chemical composition, and ti...

The use of modified black wattle tannin as antifouling pigment is reported in this work. Mixture of tannin adsorbed in activated carbon (soluble fraction of tannin) and low soluble fraction of tannin was used as antifouling pigment. The soluble rosin resin was used as paint matrix. 13 C NMR analysis confirm the modification of black wattle tannin through the cleavage of tannin interflavonoid bo...

Hedqvist, H. 2004. Metabolism of soluble proteins by rumen microorganism and the influence of condensed tannins on nitrogen solubility and degradation. Doctoral thesis. ISSN 1401-6249, ISBN 91-576-6780-2. The amino acid requirements of ruminants are met by two sources; microbes leaving the rumen and dietary protein escaping fermentation in the rumen. Much ruminant research has therefore focused...