hydrolyzable tannin造句

• Hydrolyzable tannins include the commonly occurring gallic and ellagic acid contained in the nutgalls.
• Hydrolyzable tannins include the commonly occurring gallic and ellagic acid contained in the nut galls.
• While many hydrolyzable tannins and most condensed tannins are water-soluble, several tannins are also highly octanol-soluble.
• The new technologies used to analyze molecular and chemical structures have shown that a division into condensed and hydrolyzable tannins is too simplistic.
• Hydrolyzable tannins break down on hydrolysis to give gallic acid and glucose or ellagic acid and glucose, known as gallotannins and ellagitannins respectively.
• At the center of a hydrolyzable tannin molecule, there is a carbohydrate ( usually D-glucose but also cyclitols like quinic or shikimic acids ).
• The gallic and ellagic acid hydrolyzable tannins react with proteins to produce typical tanning effects; medicinally, this is important to treat inflamed or ulcerated tissues.
• Although both types of tannin have been used to treat diseases in traditional medicine, the hydrolyzable tannins have long been considered official medicinal agents in Europe and North America.
• The plant also contains the hydrolyzable tannins isoterchebulin and 4, 6-O-isoterchebuloyl-d-glucose, having a tetraphenylic acid moiety ( isoterchebulic acid ).
• Most polyphenols contain repeating phenolic moieties of pyrocatechol, resorcinol, pyrogallol, and phloroglucinol connected by esters ( hydrolyzable tannins ) or more stable C-C bonds ( nonhydrolyzable condensed tannins ).
• Other examples of compounds that fall under both the WBSSH and Quideau definitions include the black tea antioxidant theaflavin-3-gallate shown below, and the hydrolyzable tannin, tannic acid, shown above.
• For anthocyanidins, precursors of the condensed tannin biosynthesis, dihydroflavonol reductase and leucoanthocyanidin reductase ( LAR ) are crucial enzymes with subsequent addition of catechin and epicatechin moieties for larger, non-hydrolyzable tannins.
• Polyphenols always have heteroatom substituents other than hydroxyl groups; ether and ester linkages are common, as are various carboxylic acid derivatives ( see theaflavin gallate image ); ester linkages are common in the hydrolyzable tannins.
• 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.
• Flavonoids and caffeic acid derivatives are biosynthesized from phenyl alanine and malonyl-CoA . Complex gallotannins develop through the " in-vitro " oxidation of 1, 2, 3, 4, 6-pentagalloyl-glucose or dimerization processes resulting in hydrolyzable tannins.
• Hydrolyzable tannins are present in many different plant species but are found in particularly high concentrations in nutgalls growing on Rhus semialata ( Chinese and Korean gallotannins ) and Quercus infectoria ( Turkish and Chinese gallotannins ), the seedpods of Caesalpinia spinosa ( Tara tannins ), and the fruits of Terminalia chebula.
• The gallic and ellagic acid hydrolyzable tannins react with proteins to produce typical tanning effects; medicinally, this is important to topically treat inflamed or ulcerated tissues . They also contribute to most of the astringent property of " manjakani " and in small insignificant doses, are great for skin whitening and killing microorganisms.
• Hydrolyzable tannins are present in many different plant species but are found in particularly high concentrations in nut galls growing on " Rhus semialata " ( Chinese and Korean gallotannins ) and " Quercus infectoria " ( Turkish and Chinese gallotannins ), the seedpods of " Caesalpinia spinosa " ( Tara tannins ), and the fruits of " Terminalia chebula ".