The rhus plants, found throughout the world, contain chemicals known as catechols
The biphenyl basic skeleton of ALN containing a salicylic moiety and a catechol
moiety could be the important part because of its interesting azole-synergistic activity.
Vinqvist, "Media effects on antioxidant activities of phenols and catechols
," Journal of the American Chemical Society, vol.
Verhoeven, "Characteristics of the inhibition of NADPH oxidase activation in neutrophils by apocynin, a methoxy-substituted catechol
," American Journal of Respiratory Cell and Molecular Biology, vol.
While the catechol
structural moiety can also chelate metal ions, flavonoids especially those with the C-4 keto functional group possess another site of metal chelation with the 5-OH group, while those (e.g., flavonols) that bear a free hydroxyl group at C-3 position have even more pronounced metal chelation capability through the C-4 keto and C5/C-3 hydroxyl sites.
in an experiment damage of epithelium cells of colon was induced by catechol
Many researchable groups focused on the problems of recognition and selective determination of catechol
amines, especially dopamine, with optical detection methods.
Compounds with a catechol
moiety in the B ring and a 2,3-double bond in conjugation with a 4-carbonyl group in the ring C show potent radical scavenging activity .
"Our data show, for the first time, that caffeine, catechols
and N-alkanoly-5-hydroxytryptamides are those coffee components that stimulate molecular mechanisms of stomach acid secretion in human stomach cells.
This was achieved using (1) batch alumina extraction, a simple yet remarkably effective method for purifying catechols
; (2) separation of DHPG from the solvent front, facilitated by a postcolumn series of coulometric electrodes; and (3) optimization of the chromatography and mobile phase.
In the liver and mammary glands, CYP1A1 and CYP1B1 generate the catechols
2-hydroxyestradiol and 4-hydroxyestradiol from estrogen, respectively (Tsuchiya et al.
Antioxidants owe their popularity to two factors: Consumers have been educated extensively to the healthful effects of individual antioxidants, and advances in processing technologies make it possible for such ingredients as green tea catechols
and omega3 fatty acids from fish to appear innocuously and effectively in foods and beverages that are already popular with consumers.