Güncel Gönderiler: Fizik Bölümü
Toplam kayıt 1178, listelenen: 181-200
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Removal of aluminium by Alizarin Yellow-attached magnetic poly(2-hydroxyethyl methacrylate) beads
(Elsevier Science BV, 2003)Since the discovery of the implication of aluminium in dialysis encephalopathy, much progress has been made in the preparation of dialysis water from which the metal is now virtually excluded. In this study, Alizarin ... -
One-bond and long-range coupling constants of substituted 2-cyanopyridines. GIAO/DFT calculations of proton and carbon chemical shifts and coupling constants
(Elsevier Science BV, 2006)The magnitude of one bond and long-range coupling constants ((n)J(HH) and (n)J(CH)) in isomeric cyanopyridines-(1, 2, 3), methyl-(4, 5, 6, 7), 3-ethyl-(8), chloro-(9), 3-bromo-(10), acetyl-(11, 12), 5-ethoxycarbonyl-(13) ... -
gNMR simulated H-1 and proton-coupled C-13 NMR spectra of substituted 3-nitropyridines. GIAO/DFT calculated values of proton and carbon chemical shifts and coupling constants
(Elsevier Science BV, 2006)The magnitude of one bond and long-range coupling constants in 3-nitropyridine 1 and its derivatives 2-16 were determined from the proton-coupled C-13 NMR spectra in CDCl3. The GIAO/DFT (Density Functional Theory/Gauge ... -
Selective removal of bilirubin from human plasma with bilirubin-imprinted particles
(American Chemical Society, 2007)The objective of this study is to prepare bilirubin-imprinted polymeric particles for the selective removal of bilirubin from hyperbilirubinemic human plasma. N-methacryloyl-(L)-tyrosine methylester (MAT) was chosen as the ... -
Thioamidoalkylation of 1,3-dicarbonyl compounds, enol silyl ethers, and enamines
(Georg Thieme Verlag Kg, 2007)Novel syntheses of beta-thioamido ketones via thioamidoalkylations of malonates, beta-keto esters, beta-diketones, enol silyl ethers, and enamines with N-(alpha-thioamidoalkyl)benzotriazoles are described. -
Molecular imprinted particles for lysozyme purification
(Elsevier Science BV, 2007)Molecular recognition-based separation techniques have received much attention in chemistry and biology because of their high selectivity for target molecules. The aim of this study is to prepare lysozyme-imprinted polymers ... -
Immunoglobulin G depletion from human serum with metal-chelated beads under magnetic field
(Elsevier Science BV, 2007)Magnetic poly(ethylene glycol dimethacrylate-N-methacryloyl-(L)-histidine methyl ester) [mag-poly(EGDMA-MAH) beads, 50-100 mu m in diameter, were produced by suspension polymerization for affinity depletion of immunoglobulin ... -
Porous poly(hydroxyethyl methacrylate) based monolith as a new adsorbent for affinity chromatography
(Elsevier Science BV, 2005)A new approach was developed to obtain an efficient and cost effective purification of IgG from human plasma. Porous monoliths were obtained by the bulk polymerization of 2-hydroxyethyl methacrylate (HEMA) and N-methacry ... -
FTIR spectroscopic and theoretical study of the photochemistry of matrix-isolated coumarin
(Wiley, 2007)The infrared spectrum of monomeric unsubstituted coumarin (C9H6O2; 2H-1-benzopyran-2-one), isolated in solid argon at 10 K is presented and assigned. The UV-induced (lambda > 200 nm) unimolecular photochemistry of the ... -
Novel fused D-A dyad and A-D-A triad incorporating tetrathiafulvalene and p-benzoquinone
(American Chemical Society, 2004)Novel fused donor-acceptor dyad (TTF-Q or D-A) and acceptor-donor-acceptor triad (Q-TTF-Q or A-D-A) incorporating the donor tetrathiafulvalene (TTF) and the acceptor p-benzoquinone (Q) have been synthesized. The solution ... -
NMR spectra, GIA and charge density calculations of five-membered aromatic heterocycles
(Wiley-Blackwell, 2007)The B3LYP/6-31+G(d) molecular geometry optimized structures of 17 five-membered heterocycles were employed together with the gauge including atomic orbitals (GIAO) density functional theory (DFT) method at the B3LYP/6-31+G(d,p), ... -
An ab initio study on protonation of some substituted thiazole derivatives
(Elsevier Science BV, 2005)The preferred tautomeric forms of some 2-oxothiazole derivatives were predicted using acidity constants calculated by experimental and ab initio methods. Thiazole derivatives were subject to geometry optimization at two ... -
A theoretical study of substituent effects on tautomerism of 2-hydroxybenzimidazoles
(Springer-Verlag, 2003)The geometries, relative stabilities of some 4(7) and 5(6) substituted 2-hydroxybenzimidazole derivatives were calculated with full geometry optimization using AM1 and PM3 in aqueous phase. With the exception of molecules ... -
A quantum chemical study on structures of (+)-(R)-2,2-bis(diphenylphosphinoyl)-1,1 '-binaphthyl and its hydroquinone complex
(Elsevier Science BV, 2005)The (+)-(R)-2,2-bis(diphenylphosphinoyl)-1,1'-binaphthyl ((+)-(R)-BINAPO) and its cocrystal with hydroquinone (HQ) (1:1) were studied theoretically with AM1, PM3, MNDO and MINDO/3 semi-empirical methods to elucidate their ... -
Spectroscopic determination of acid dissociation constants of some pyridyl Shiff bases
(American Chemical Society, 2006)The acid dissociation constants (pK(a)) of eight biologically active pyridyl Shiff bases were determined using a UV-vis spectroscopic technique at 25 +/- 0.1 degrees C. The first acidity constants (pK(a1)) of the ... -
Electrodeposition of polyaniline, poly(2-iodoaniline), and poly(aniline-co-2-iodoaniline) on steel surfaces and corrosion protection of steel
(Elsevier Science BV, 2005)Polyaniline (PANi), poly(2-iodoaniline) (PIANi), and poly(aniline-co-2-iodoaniline) (co-PIANi) were synthesized using cyclic voltammetry in acetonitrile solution containing tetrabuthylammonium perchlorate (TBAP) and ... -
Inhibition of the corrosion of low carbon steel in acidic solution by selected polyelectrolytes and polymers
(Emerald Group Publishing Limited, 2003)The inhibiting effects of 2,6-ionen and 2,10-ionen type polyvinylbenzyltrimethylammonium chloride, and latex, on low carbon steel in hydrochloric acid solution was investigated by potentiodynamic polarisation measurements ... -
A quantum chemical study on structure of 1,2-bis(diphenylphosphinoyl)ethane and phenol cocrystal
(Elsevier Science BV, 2004)The cocrystal of 1,2-bis(diphenylphosphinoyl)ethane (DPPEO) with phenol (1: 1) were studied theoretically with AM1, PM3, MNDO and MINDO/3 semi-empirical methods to elucidate its structure. The bond lengths and angles from ... -
Investigation of acid-base behaviour of some 2-pyridylbenzimidazoles using semi-empirical methods
(Elsevier Science BV, 2002)Acid-base behaviour of some 2-(n'-pyridyl) benzimidazoles (n' = 2,3,4) have been studied in order to search the protonation site and to predict pK(a) values of these molecules both in gas and aqueous phases using semi-empirical ... -
Quantum chemical and experimental studies on the mechanism of alkylation of beta-dicarbonyl compounds. The synthesis of five and six membered heterocyclic spiro derivatives
(MDPI, 2004)The alkylation of beta-dicarbonyl compounds in a K2CO3/DMSO system was found to afford O- and C-alkylated derivatives, depending on the type of the P-dicarbonyl compound involved. The alkyl derivatives obtained were used ...