from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A yellow crystalline powder, C14H8O2, that is insoluble in water and used chiefly in the manufacture of dyes.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A tricyclic quinone, derived from anthracene.
- n. Any derivative of this parent compound, mostly natural pigments or synthetic dyes.
from the GNU version of the Collaborative International Dictionary of English
- n. A hydrocarbon, C6H4.C2O2.C6H4, subliming in shining yellow needles. It is obtained by oxidation of anthracene.
from The Century Dictionary and Cyclopedia
- n. A product (C14H8O2) obtained from anthracene by the action of oxidizing agents. From it alizarin is prepared.
In addition, it is rich in the compound anthraquinone, which may reduce fat absorption in the intestines and help rhubarb function as a mild laxative.
The mechanism of action of anthraquinone glycosides involves the systematic deposition of these compounds to the site of action in the intestine, enzymatic cleavage of the sugar groups and the slow oxidation of the resulting compounds, thus releasing the free anthraquinones which act on the intestines to produce peristalsis (Fairbairn, 1964).
Fluctuation of the radioactivity in the anthraquinone constituents occurred throughout the passage suggesting that biosynthesis and biotransformation were occurring simultaneously.
The suggested transformation of anthraquinone derivatives is given in Figure 5.
They contain the anthraquinone derivatives, mainly as glycosides, which on hydrolysis yield aglycones which are hydroxyanthraquinone derivatives.
Endrin has often been used to repel rodents and kill insects, and thiram or anthraquinone to repel birds.
Dr Schupphaus found that propyl and isobutyl alcohols with camphor were active solvents, and the ketones, palmitone, and stearone in alcohol solution, also alpha - and beta-naphthol, with alcohol and anthraquinone
He then proceeded to consider the manufacture of alizarine purpurine, and divided its manufacture into four stages: 1, the purification of crude anthracine; 2, the conversion of the purified anthracine into anthraquinone; and 3, the production of sulpho acid of anthraquinone and the conversion of this sulpho-acid into alizarine and purpurine.
In the course of the lecture many interesting specimens of various products were produced and dilated upon, the lecturer fully describing the process of purifying the crude anthracine and of the conversion of the purified anthracine into anthraquinone.
Bartels's lab used the following molecules in the study: anthraquinone and pentaquinone