carboxylic acid

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References in periodicals archive ?
Where salts of the amines, phenol and carboxylic acids are reportedly antimicrobial [22, 23].
We achieved this reduction by adding organic carboxylic acid to chelate the dissolved metal ions.
Carboxylic acids are used in various industries for the production of various types of compounds; hence, these are present in wastewater generated in these industries.
They also found other pyridine carboxylic acids at similar concentrations and, for the first time, found pyridine dicarboxylic acids.
In the final reaction step, the primary alcohol was selectively oxidized to the corresponding carboxylic acid using BAIB-TEMPO oxidation conditions in yields of 82%.
Manufacturing the products for more than 70 years, Eastman is a world leader in the production of carboxylic acids for multiple markets, including food and feed, pharmaceutical chemical intermediates, and agriculture.
The C-1 to C-6 aldehydes and carboxylic acids and the C-3 to C-6 ketones decreased in concentration, when compared to the control and polymerization-inhibited juices.
The first is that carboxylic acids increase phosphate availability by changing the surrounding chemical environment via substitution reactions, whereby carboxylic acids bind preferentially with solid-phase cations (including aluminium, A1), decreasing the number of available P-sorption sites (Hue 1991; Violante et al.
The 2013 release of the Medical Subject Headings (MeSH) includes improvements in a variety of areas including new ingredient identifiers from the FDA, a redesign of the Carboxylic Acids tree structure and new terms from the disease portion of the Online Mendelian Inheritance in Man (OMIM).
1] were examined to differentiate absorbance peaks due to cellulose esterification from those indicative of triglyceride esters, carboxylic acids, and amide carbonyl groups (per the reaction of diacids in the presence of ammonium hydroxide (7)).
Pyrazine carboxylic acids have been found on the basis of the reported x-ray molecular structures to be interesting and versatile ligands [1-9].
Based on the legislative history of the Dietary Supplement Health and Education Act of 1994 (DSHEA), FDA concluded that nutrition science was the appropriate scientific context for analysis of what is an "amino acid" under Section 201(ff)(l)(D) and noted that amino acids recognized in nutrition science are alpha-amino carboxylic acids, which are constituents of proteins.
Opening chapters discuss reaction of alcohols with carboxylic acids and their derivatives, use of tin and other metal alkoxides, conversion of carboxylic acids into esters without use of alcohols, and the ester interchange reaction.
In the absence of oxygen, carboxylic acids present due to hydrolysis of the polyolester (POE) oils or oxidation of any type oil will not react with copper even in the presence of water (Field and Henderson 1998).
It prevents the premature oxidation of unsaturated fatty acid esters in biodiesel and thus the formation of highly volatile compounds and corrosive carboxylic acids.