anthraquinone

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Related to Anthroquinone: anthraquinone glycosides

anthraquinone

[‚an·thrə·kwi′nōn]
(organic chemistry)
C6H4(CO)2C6H4 Yellow crystalline diketone that is insoluble in water; used in the manufacture of dyes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The anti-inflammatory effect of Hp is attributed by Bezakova et al (1999) to its isolated constitutes anthrone, anthroquinone, emodin hypericin and pseudohypericin while its analgesic effect may be attributed to the presence of flavonoids, tannins and saponins (Sanchez-Mateo 2006, Bezakova 1999).
Test group Chloroform extract Ethanol extract Alkaloid + + Protein and amino acids + - Carbohydrates + + Cardiac glycosides + + Anthroquinone glycosides + + Tannin and Phenolic compound + + Steroids and sterols + - Saponins - - Flavonoids - - Test group Methanol extract Aqueous extract Alkaloid + + Protein and amino acids + + Carbohydrates + + Cardiac glycosides + + Anthroquinone glycosides + + Tannin and Phenolic compound + - Steroids and sterols - + Saponins - + Flavonoids - + (Key: '+' = Present, '-' = Absent).
Bockris also presents the somewhat lesser known example of the "backfire beetle," which possesses two sacs, one of which contains [H.sub.2][O.sub.2] and the other anthroquinone. The two chemicals are harmless by themselves but when mixed upon expulsion become scalding hot as they are squirted at an enemy.