dicarboxylic acid

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dicarboxylic acid

[dī¦kär·bäk¦sil·ik ′as·əd]
(organic chemistry)
A compound with two carboxyl groups.
References in periodicals archive ?
The intent of this work was to develop a rapid method for the selective analysis of dicarboxylic acids (and MMA in particular) by LC-MS/MS, based on the power of the MS/MS analyzer to differentiate between MMA and SA, that does not require chromatographic separation of these isomeric analytes.
In biological samples, the parent ion scan detects short-chain acylcarnitines such as propionylcarnitine and butyrylcarnitine, long-chain acylcarnitines such as palmitoylcarnitine and linoleylcarnitine, dicarboxylic acid acylcarnitines such as glutarylcarnitine, or hydroxyacylcarnitines such as 3-hydroxyisovalerylcarnitine [12].
In his classification, Holliday (2, 3) grouped the metal salts of dicarboxylic acids (4), invert glasses (5), and polysulfides (6) as ionic polymers of the dianion type, i.
Increased urinary excretion of dicarboxylic acids and 4-hydroxyphenyllactic acid in patients with Zellweger syndrome.
Of greater concern is amino acid analysis, in which dicarboxylic acids produce mass shifts that may be more problematic.
The last route goes through the amide-forming reaction from imide-containing monomers such as dicarboxylic acids or diamines.
Terephthaloyl-bis-(4-oxyhenzoyichloride), 3, was synthesized by treating with excess thionyl chloride, at reflux temperature, of the corresponding dicarboxylic acid that resulted from the reaction of 4-hydroxybenzoic acid (2 mol) with terephthaloyl chloride (1 mol), according to a method presented in the literature (27); mp.
Liquid chromatographic determination of dicarboxylic acids based on intramolecular excimer-forming fluorescence derivatization.
Previously, comparison of the hydrolytic stability of cycloaliphatic diacids had been reported using methyl ester of dicarboxylic acids (5) and CHDA-based polyols crosslinked with melamine.
preferably 50-120, based on acyclic aliphatic and cycloaliphatic dicarboxylic acids, with diol(s) and triol(s), compound(s) with NCO-reactive groups and anion-forming functional group(s), acyclic aliphatic and cycloaliphatic diisocyanates.
This is a professional and depth research report on Global and China Long Chain Dicarboxylic Acids industry.
In the present work, we have attempted to synthesize a new class of poly(mannitol citric dicarboxylate) [p(MCD)] copolyesters from mannitol, citric acid (CA), and dicarboxylic acids (DAs) such as succinic acid, adipic acid, and sebacic acid.