from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Either of two isomers of polycyclic aromatic ketones derived from naphthalene.
from the GNU version of the Collaborative International Dictionary of English
- n. A yellow crystalline substance, C10H6O2, analogous to quinone, obtained by oxidizing naphthalene with chromic acid.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a fat-soluble vitamin that helps in the clotting of blood
Sorry, no etymologies found.
In the very same year Doisy reported that, together with his associates, he had succeeded not only in determining the chemical structure of vitamin K - it was found to be a naphthoquinone derivate - but also in synthetically preparing in his laboratory a K vitamin identical with the natural one.
The anti-vitamin K activity was thought to be associated with the hydroxyl group attached to the naphthoquinone ring ofthe compound.
Within this naphthoquinone category, there are two basic types of vitamin K.
[alpha] - naphthoquinone, were identical; whilst Meldola acetylated the azophenols, and split the acetyl products by reduction in acid solution, but obtained no satisfactory results.