The woody oil industry generates a large amount of seed shell waste during its production. Therefore, this paper employs central composite design (CCD) methodology to optimize the ultrasonic-assisted extraction process, thus utilizing byproduct. infrared spectrum and thermogravimetric analysis is adopted explore chemical structure thermal stability tannin. Besides, tannin resin (TF) prepared el...

The aim of this work was the synthesis of silver nanoparticles using two types of tannins, hydrolysable and condensed, and comparing the properties of incurred colloids. Both tannins are powerful antioxidants (reductants) which differ in their chemical structure as well as certain properties, which influences the formation of silver particles as well as the composition and properties of the res...

Tannins have been used to trigger positive effects on ruminal metabolism. So, increasing levels of tannic acid in a sorghum-based diet for five Holstein/Zebu crossbred lactating heifers were subject 5 × Latin square experimental design, x tannins periods. The excretion total purine derivatives, through the collection spot urine samples, and N concentration values milk used. All received 9.87 kg...

Dihydroflavonol 4-reductase (DFR, EC 1.1.1.219) is a rate-limited enzyme in the biosynthesis of anthocyanins and condensed tannins (proanthocyanidins) that catalyzes the reduction of dihydroflavonols to leucoanthocyanins. In this study, two full-length transcripts encoding for PtrDFR1 and PtrDFR2 were isolated from Populus trichocarpa. Sequence alignment of the two PtrDFRs with other known DFRs...

We have shown that naturally occurring tannins possess antitumor promotion activity in mouse skin. In the present investigation, we studied the ability of a hydrolyzable tannin, gallotannin (GT), and a condensed tannin extracted from red alder (RA) bark to inhibit 1,2-dimethylhydrazine (DMH)-induced colonic aberrant crypt foci (ACF) and tumors in Balb/c mice. In addition, we determined the abil...

The 16S rRNA sequences and selected phenotypic characteristics were determined for six recently isolated bacteria that can tolerate high levels of hydrolyzable and condensed tannins. Bacteria were isolated from the ruminal contents of animals in different geographic locations, including Sardinian sheep (Ovis aries), Honduran and Colombian goats (Capra hircus), white-tail deer (Odocoileus virgin...