Condensed tannin - Wikipedia
Condensed tannins (proanthocyanidins, polyflavonoid tannins, catechol-type tannins, pyrocatecollic type tannins, non-hydrolyzable tannins or flavolans) are polymers formed by the condensation of flavans. They do not contain sugar residues.
Tannin - Wikipedia
Condensed tannins, e.g., quebracho tannin, and Hydrolyzable tannins, e.g., chestnut tannin, appear to be able to substitute a high proportion of synthetic phenol in phenol-formaldehyde resins for wood particleboard.
24 Condensed tannins: structure, activity and characterization
2020年11月28日 · Abstract. As a class of plant polyphenolic compounds contained in some forages [i.e., sainfoin (Onobrychis viciifolia Scop.), big trefoil (Lotus pedunculatus Cav.), birdsfoot trefoil (Lotus corniculatus L.)], condensed tannins (CTs) exhibit a …
Review on tannins: Extraction processes, applications and possibilities ...
2020年12月1日 · Tannins are found in most of the species throughout the plant kingdom, where their functions are to protect the plant against predation and might help in regulating the plant growth. There are two major groups of tannins, i.e., hydrolyzable and condensed tannins.
Structure and Chemical Properties of the Condensed Tannins
The condensed tannins are oligomers and polymers of polyhydroxyflavan-3-ol monomer units linked by acid-labile 4 → 6 or 4 → 8 bonds. The polymers are polydisperse, and the chains are irregular, sometimes branched, and often contain more than one type of configurational base unit.
Turning the Forage World Upside Down – Condensed Tannins …
2018年3月27日 · Too high of a condensed tannin content can suppress forage digestibility. Not all tannins are created equal; some bind tightly with proteins, others do not, depending on their chemical makeup. Where’s the potential benefit?
Guideline for measurement of condensed tannin - Li - 2023
2022年9月10日 · Condensed tannins, also known as proanthocyanidins, are oligomers and polymers of flavan-3-ol (Figure 1a), which are composed of a carbon backbone of C6-C3-C6, and comprise two aromatic rings A and B and a pyran ring, the heterocycle C (Aron & Kennedy, 2008; Teng et al., 2021).
Tannins (hydrolysable tannins, condensed tannins, phlorotannins ...
2020年3月6日 · Condensed tannins are the larger group of tannins, form reddish-colored, waterinsoluble phenolic precipitates called tanner's reds or phlobaphenes, and are less astringent when compared to ...
Biosynthesis and Genetic Regulation of Proanthocyanidins in …
Proanthocyanidins (PAs), also known as condensed tannins, are a group of polyphenolic secondary metabolites synthesized in plants as oligomers or polymers of flavan-3-ol units via the flavonoid pathway.
The condensed tannins (syn. polymeric proanthocyanidins) represent a major group of phenolic compounds in woody and some herbaceous plants (1-3). Their exceptional concentrations in the barks and heartwoods of a variety of tree species have resulted in their commercial
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