نتایج جستجو برای: dicarboxylic acid

تعداد نتایج: 748042  

دوسک, میکائیل, طباطبایی, معصومه, پوجارویا, میکاسل,

A nickel complex with pyridine-2,6-dicarboxylic acid formulated as [Ni(pydcH)2].3H2O was synthesized and its crystal structure determined with single-crystal X-ray at diffraction temperatures (296 K and 120 K).  Pyridine-2,6-dicarboxyli acid  deprotonated on one group of COOH and two pydcH- anion is coordinated to Ni(II) atom as a tridentate ligand forming a distorted octahedral environment. Th...

A. Malekzadeh M. Lahooti M. Ranjbar M. Yousefi

In this study, isophthalic acid-zirconium(IV) nanocomposite has been prepared from zirconyl nitrate pentahydrate and potassium iodide, with isophthalic acid, (C8H6O4=Benzene-1,3-dicarboxylic acid) as a ligand, via sonochemical method in ethylene glycol and methanol as solvents. The crystalline tetragonal ZrO2 has been produced by thermal decomposition of isophthalic acid-zirconium(IV) nanocompo...

Journal: :Macromolecules 2021

Epoxy/dicarboxylic acid vitrimer was prepared by the solvent-free reaction of diglycidyl ether bisphenol A (DGEBA) and 1,4-cyclohexane dicarboxylic (CHDA) with addition monobutyltin oxide (Sn) as a catalyst. By tailoring catalyst content (?5 mol %), an effective conversion functional groups during cure demonstrated network polymerization mechanisms sequence side reactions. Indeed, manufactured ...

Journal: :Acta crystallographica. Section B, Structural science 2005
John A Cowan Judith A K Howard Garry J McIntyre Samuel M F Lo Ian D Williams

Pyridine-3,5-dicarboxylic acid has been studied by single-crystal neutron diffraction at 15 and 296 K. Pyridine-3,5-dicarboxylic acid, in which the carboxylic acid protons have been replaced by deuterons, has also been studied at 15, 150 and 296 K. The protonated structure contains a short N...H...O hydrogen bond [N...O 2.523 (2) Angstrom at 15 K]. Temperature-dependent proton migration occurs ...

Journal: :Brain research 1992
J Cockhill K Jhamandas R J Boegman R J Beninger

Picolinic acid, a pyridine monocarboxylic acid derived from tryptophan metabolism by the kynurenine pathway, was shown to block cortical cholinergic neurotoxicity induced by quinolinic acid (QUIN), a pyridine dicarboxylic acid yielded by the same pathway. This study examined the specificity of the anti-toxic effect of picolinic acid by comparing its effect with several structurally related mono...

Journal: :The Journal of biological chemistry 1988
S Cerdan B Künnecke A Dölle J Seelig

The hepatic metabolism of 1,omega-dodecanedioic acid, a physiologically relevant representative of the medium-chain dicarboxylic acid family, has been studied by a combination of in vivo and in vitro 13C and 1H NMR spectroscopic techniques. Rats in different nutritional or hormonal situations were infused with [1,12-13C2]- or [1,2,11,12-13C4]dodecanedioic acid, and the kinetics of 13C label app...

Journal: :Biochemical Society transactions 1988
F Van Hoof J Vamecq J P Draye K Veitch

The w-oxidation of fatty acids results in the formation of mediumand long-chain dicarboxylates. By this accessory metabolic pathway monocarboxylic acids are first converted into w-hydroxymonocarboxylic acids, a reaction catalysed by the microsomal mixed-oxidase function system (Pettersen, 1972). These intermediates are subsequently converted into w-oxomonocarboxylic acids and dicarboxylic acids...

Journal: :Journal of general microbiology 1987
R W Eaton D W Ribbons

When Micrococcus strain 12B grown on o-phthalate was incubated with 3-methylphthalate, three compounds accumulated. These were shown to be 2-pyrone-3-methyl-4,6-dicarboxylic acid, 3,4-dihydroxy-6-methylphthalic acid, and 5-hydroxy-3-methyphthalic acid, all previously undescribed. A pathway for the formation of these compounds is proposed.

Journal: :Zaštita materijala 2022

Corrosion of Aluminum metal at pH 10 has been controlled by dicarboxylic acids such as oxalic acid (OA) and adipic (AA).The Inhibition efficiency (IE) determined the classical weight loss method. The maximum inhibition offered (AA) 250 ppm Zn2+ 50 system are 88 96%. To determine values Linear Polarization Resistance (LPR) corrosion Current (Icorr), potentiodynamic polarization study used.

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