Macromolecular complexes of acrylamide and sodium acrylate copolymer with microelements, including Cu(II), may form at preparation crop protection stimulation compositions, where the serves as an adhesive, water-retaining film-forming agent. Preparations for production also contain amino acids that protect plants under stressful conditions (cold, dry, etc.). Carboxylic groups copolymer, carboxy...

Organic acid content is regarded as one of the most important quality traits of fresh tomato (Solanum lycopersicum). However, the complexity of carboxylic acid metabolism and storage means that it is difficult to predict the best way to engineer altered carboxylic acid levels. Here, we used a biochemical analysis of a tomato introgression line with increased levels of fruit citrate and malate a...

Mycobacterium sp. strain KR20, which was isolated from a polycyclic aromatic hydrocarbon (PAH) contaminated soil of a former gaswork plant site, metabolized about 60% of the fluoranthene added (0.5 mg ml(-1)) to batch cultures in mineral salts medium within 10 d at 20 degrees C. It thereby increased its cell number about 30-fold and produced at least seven metabolites. Five metabolites, namely ...

Macrae, I. C. (Cornell University, Ithaca, N.Y.), and M. Alexander. Metabolism of phenoxyalkyl carboxylic acids by a Flavobacterium species. J. Bacteriol. 86:1231-1235. 1963.-A Flavobacterium sp. isolated from soil and grown in media containing 4-(2,4-dichlorophenoxy) butyric acid metabolized omega-linked 2,4-dichlorophenoxyalkyl carboxylic acids in the series from 3-(2,4-dichlorophenoxy)propio...

Azetidine-2-carboxylic acid has been recognized as an important constituent of the 70% ethanolsoluble-nitrogen fraction of many liliaceous plants (Fowden, 1956; Fowden & Steward, 1957). ConvaUaria majali8 (lily of the valley) and Polygonatum multiflorum (a Solomon's seal) are two common representatives of these plants im Britain, and part 6 of this series (Fowden & Bryant, 1959) described exper...

Carboxylic acid groups were introduced onto thermomechanical pulp (TMP) long fiber surfaces by 2,2,6,6,tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidation in the present study. The number of introduced carboxylic groups was closely related to the NaClO dosage, and more flexible fibers with lower curl and kink index were generated. Lignin was dissolved during the TEMPO-mediated oxida...

By DFT calculation, we found that acid-catalyzed carboxylic acid esterification and ester hydrolysis are brief two-step reactions. First, the carboxylic acid hydroxyl-oxygen or ester alkyl-oxygen is protonated, which generates a highly active acylium ion. The protonation requires an activation energy (Ea) of 4-10 kcal mol(-1), and is the rate-controlling step of the esterification or hydrolysis...