Güncel Gönderiler: Makale Koleksiyonu
Toplam kayıt 1058, listelenen: 601-620
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Electrochemical preparation of a molecularly imprinted polypyrrole-modified pencil graphite electrode for determination of ascorbic acid
(Molecular Diversity Preservation Int, 2008)A molecularly imprinted polymer (MIP) polypyrrole (PPy)-based film was fabricated for the determination of ascorbic acid. The film was prepared by incorporation of a template molecule (ascorbic acid) during the ... -
HPLC fluorescence determination of ochratoxin A utilizing a double internal standard and its application to poultry feed
(Scientific Technical Research Council Turkey-Tubitak, 2015)A validated liquid chromatography method employing a fluorescence detector for the determination of ochratoxin A (OTA) was developed with double internal standard and it was applied to ten different poultry feeds. The ... -
Biosorption of a reactive textile dye from aqueous solutions utilizing an agro-waste
(Elsevier Science BV, 2009)In the present study a low-cost waste biomass derived from canned food plant, was tested for its ability to remove reactive textile dye from aqueous solutions. The batch biosorption experiments were carried out at various ... -
Oxidation of 2,6-di-tert-butylphenol with tert-butyl hydroperoxide catalyzed by iron porphyrin tetrasulfonate, iron porphyrin tetracarboxylate and their supported analogues in a water-methanol mixture
(Elsevier Science BV, 2019)In this study, two water-soluble iron porphyrins bearing sulfonate and carboxylate functionalities (FePTS and FePTC, respectively) and their supported analogues were used as catalysts for the oxidation of 2,6-di-tert-butylphenol ... -
Quinolone-Hydroxyquinoline Tautomerism in Quinolone 3-Esters. Preserving the 4-Oxoquinoline Structure To Retain Antimalarial Activity
(American Chemical Society, 2015)Recent publications report in vitro activity of quinolone 3-esters against the bc(1) protein complex of Plasmodium falciparum and the parasite. Docking studies performed in silica at the yeast Q(o) Site established a key ... -
Using heavy atom rare gas matrix to control the reactivity of 4-methoxybenzaldehyde: A comparison with benzaldehyde
(Amer Inst Physics, 2012)Different patterns of photochemical behavior were observed for 4-methoxybenzaldehyde (p-anisaldehyde) isolated in xenon and in argon matrices. Monomers of the compound isolated in solid Xe decarbonylate upon middle ultraviolet ... -
Matrix isolation infrared spectroscopic study of 4-Pyridinecarboxaldehyde and of its UV-induced photochemistry
(Pergamon-Elsevier Science LTD, 2017)The structure, infrared spectrum, barrier to internal rotation, and photochemistry of 4-pyridinecarboxaldehyde (4PCA) were studied by low-temperature (10 K) matrix isolation infrared spectroscopy and quantum chemical ... -
Thermal and Photoinduced Control of Relative Populations of 4-Methoxybenzaldehyde (p-Anisaldehyde) Conformers
(American Chemical Society, 2010)Two almost isoenergetic conformers of 4-methoxybenzaldehyde (p-anisaldehyde), O-trans and O-cis, are nearly equally populated in gas phase at room temperature. The existence of these two conformers of similar energy makes ... -
FTIR investigation of the O-H center dot center dot center dot Xe interaction in simple carboxylic acids in solid xenon
(Amer Inst Physics, 2012)The O-H stretching region of the infrared spectra of a series of carboxylic acids in Xe matrices was investigated as a function of temperature. Upon increasing the temperature, the vO-H band site-components undergo reversible ... -
Near-infrared and ultraviolet induced isomerization of crotonic acid in N-2 and Xe cryomatrices: First observation of two high-energy trans C-O conformers and mechanistic insights
(Amer Inst Physics, 2014)E-crotonic acid was isolated in cryogenic solid N-2 and xenon matrices, and subjected to Laser ultraviolet (UV) and near-infrared (NIR) irradiations. In the deposited matrices, the two low-energy cis C-O E-cc and E-ct ... -
Infrared Spectrum and UV-Induced Photochemistry of Matrix-Isolated 5-Hydroxyquinoline
(American Chemical Society, 2015)The Mixture, infrared spectrum, arid.photo-chemistry of 5-hydroxyquitoline (5HQ) were studied by matrix isolation infrared spectroscopy, complemented by theoretical calculations performed, at the DFT(B3LYP)/6-311++G(d,p) ... -
First observation of methane photochemical generation from an N,N-dimethylamino-substituted arene: the case of 4-(N,N-dimethylamino)benzaldehyde (DMABA)
(Pergamon-Elsevier Science LTD, 2016)The first observation of methane photochemical production from an N,N-dimethylamino-substituted arene (DMABA: 4-(N,N-dimethylamino)benzaldehyde) is described. UV irradiation (lambda>298 nm) of DMABA isolated in a solid low ... -
Photorotamerization of matrix-isolated acrylic acid revisited
(Amer Inst Physics, 2011)In this study, the conformational preferences and photochemistry of acrylic acid (AA, CH(2)=CHCOOH) monomer isolated in cryogenic argon and krypton matrices were interpreted, based on results of quantum chemical calculations. ... -
Crystal Structure, Matrix-Isolation FTIR, and UV-Induced Conformational Isomerization of 3-Quinolinecarboxaldehyde
(American Chemical Society, 2014)The crystal structure of 3-quinolinecarboxaldehyde (3QC) has been solved, and the compound has been shown to crystallize in the space group P2(1)/c (monoclinic) with a = 6.306(4), b = 18.551(11), c = 6.999(4) angstrom, ... -
Structure and Photochemistry of N-Salicylidene-p-carboxyaniline Isolated in Solid Argon
(American Chemical Society, 2015)Infrared matrix isolation spectroscopy and DFT/B3LYP/6-311++G(d,p) calculations have been used to characterize the conformational space of the enol-imine and keto-amine tautomers of N-salicylidene-p-carboxyaniline (SCA) ... -
In situ photoproduction of dichlorodibenzo-p-dioxin from non-ionic triclosan isolated in solid argon
(Elsevier Science BV, 2012)The infrared spectrum of triclosan [or 5-chloro-2-(2,4-dichlorophenoxy)phenol] isolated in a low temperature (similar to 15 K) argon matrix has been recorded and assigned with help of DFT claculations undertaken with the ... -
Experimental Evidence of Long-Range Intramolecular Vibrational Energy Redistribution through Eight Covalent Bonds: NIR Irradiation Induced Conformational Transformation of E-Glutaconic Acid
(American Chemical Society, 2017)Long-range intramolecular-vibrational energy redistribution (IVR) driven conformational changes were investigated in a matrix-isolated open-chain, asymmetrical dicarboxylic acid, E-glutaconic acid. Although the analysis ... -
Conformers of beta-aminoisobutyric acid probed by jet-cooled microwave and matrix isolation infrared spectroscopic techniques
(Amer Inst Physics, 2013)beta-aminoisobutyric acid (BAIBA) has been studied in isolation conditions: in the gas phase and trapped into a cryogenic N-2 matrix. A solid sample of the compound was vaporized by laser ablation and investigated through ... -
Thermal decomposition of allantoin as probed by matrix isolation FTIR spectroscopy
(Pergamon-Elsevier Science LTD, 2009)The optimized geometries, energies of the possible conformers of allantoin (2,5-dioxo-4-imidazolidinyl urea, the diureide of glyoxylic acid) as well as the barriers for conformational interconversion have been calculated ... -
Low temperature FTIR, Raman, NMR spectroscopic and theoretical study of hydroxyethylammonium picrate
(Elsevier Science BV, 2016)A combined experimental (infrared, Raman and NMR) and theoretical quantum chemical study is performed on the charge-transfer complex hydroxyethylammonium picrate (HEAP). The infrared (IR) spectra for HEAP were recorded at ...
