Results 21 to 30 of about 4,994,766 (232)

The effects of solvents and structure on the electronic absorption spectra of the isomeric pyridine carboxylic acid N-oxides [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2013
The ultraviolet absorption spectra of the carboxyl group of three isomeric pyridine carboxylic acids N-oxides (picolinic acid N-oxide, nicotinic acid N-oxide and isonicotinic acid N-oxide) were determined in fourteen solvents in the wavelength range ...
Drmanić Saša Ž., Nikolić Jasmina B., Marinković Aleksandar D., Šekularac Gavrilo M., Jovanović Bratislav Ž.   +4 more
doaj   +1 more source

The comparative study of linear solvatation energy relationship for the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents [PDF]

Journal of the Serbian Chemical Society, 2012
Protic and aprotic solvent effects on the reactivity of picolinic, nicotinic and isonicotinic acid, as well as of some substituted nicotinic acids with diazodiphenylmethane (DDM) were investigated.
Drmanić Saša Ž., Nikolić Jasmina B., Marinković Aleksandar D., Jovanović Bratislav Ž.   +3 more
doaj   +1 more source

What if Cocrystallization Fails for Neutral Molecules? Screening Offered Eutectics as Alternate Pharmaceutical Materials: Leflunomide-a Case Study [PDF]

Pharmaceutical Sciences, 2019
Background: The manuscript is aimed to optimize the biopharmaceutical parameters of a poorly soluble, neutral anti-rheumatic drug ‘leflunomide’ by preparing its non-covalent derivatives (NCDs).
Madhu Bala, Manoj Kumar Gautam, Renu Chadha   +2 more
doaj   +1 more source

Biodegradation of Picolinic Acid by Rhodococcus sp. PA18 [PDF]

Applied Sciences, 2019
Picolinic acid (PA), a C2-carboxylated pyridine derivative, is a significant intermediate used in industrial production. PA is considered hazardous for the environment and human health. In this study, a Gram-positive bacterium, Rhodococcus sp. PA18, which aerobically utilizes PA as a source of carbon and energy, was isolated.
Yanting Zhang, Junbin Ji, Siqiong Xu, Hongmei Wang, Biao Shen, Jian He, Jiguo Qiu, Qing Chen   +7 more
openaire   +2 more sources

Polymorphism in the 1/1 Pterostilbene/Picolinic Acid Cocrystal [PDF]

Crystal Growth & Design, 2021
The crystal structures of two new polymorphs of the 1/1 pterostilbene/picolinic acid cocrystal have been analyzed by single-crystal X-ray diffraction and studied by means of DFT calculations and a set of computational tools (QTAIM, NCIplot, MEP). The observation of a new R2 2(10) synthon in each of the two polymorphs has been analyzed energetically ...
Rafael Barbas, Mercè Font-Bardia, Antonio Frontera, Rafel Prohens   +3 more
openaire   +2 more sources

Iron-Catalyzed Oxidation of 1-Phenylethanol and Glycerol With Hydrogen Peroxide in Water Medium: Effect of the Nitrogen Ligand on Catalytic Activity and Selectivity

Frontiers in Chemistry, 2020
The iron(II) complexes [Fe(bpy)3](OTf)2 (bpy = 2,2'-bipyridine; OTf = CF3SO3) (1) and [Fe(bpydeg)3](OTf)2 (bpydeg = N4,N4-bis(2-(2-methoxyethoxy)ethyl) [2,2'-bipyridine]-4,4'-dicarboxamide) (2), the latter being a newly synthesized ligand, were employed ...
Dimitri Ros, Teresa Gianferrara, Corrado Crotti, Erica Farnetti   +3 more
doaj   +1 more source

Cytokines and tryptophan metabolites can predict depressive symptoms in pregnancy

Translational Psychiatry, 2022
Depression during and after pregnancy affects up to 20% of pregnant women, but the biological underpinnings remain incompletely understood. As pregnancy progresses, the immune system changes to facilitate fetal development, leading to distinct ...
Qiong Sha, Zach Madaj, Sarah Keaton, Martha L Escobar Galvis, LeAnn Smart, Stanislaw Krzyzanowski, Asgerally T. Fazleabas, Richard Leach, Teodor T. Postolache, Eric D. Achtyes, Lena Brundin   +10 more
doaj   +1 more source

Unraveling the degradation mechanism of FIrpic based blue OLEDs: I. A theoretical investigation [PDF]

Chemistry of Materials 31, 2269 (2019), 2019
We report a detailed ab-initio study of the of the microscopic degradation mechanism of FIrpic, a popular blue emitter in OLED devices. We simulate the \emph{operando} conditions of FIrpic by adding an electron-hole pair (exciton) to the system. We perform both static calculations with the TDDFT framework and we also simulate the evolution of the ...
arxiv   +1 more source

3-Hydroxypyridinium-2-carboxylate

Acta Crystallographica Section E, 2011
Comparable to many amino acids, the title compound, C6H5NO3, is a substitution product of picolinic acid. The molecule shows approximate non-crystallographic Cs symmetry. Like many amino acids, the molecule is present in its zwitterionic state. Intra- as
Richard Betz, Thomas Gerber
doaj   +1 more source

Fluorescent Carbazole-Derived Aza[5]Helicenes: Synthesis, Functionalization, and Characterization. [PDF]

Chemistry
Variously substituted indolophenanthridines, indolocarbazoles, and cinnolinocarbazoles synthesized by ortho fusion from teraryl precursors show significant Stokes shifts, especially for the protonated states of indolophenanthridines and cinnolinocarbazole.
Marten I, Dilanas MEA, Podlech J.
europepmc   +2 more sources