Güncel Gönderiler: Fizik Bölümü
Toplam kayıt 1178, listelenen: 241-260
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The effects of fluorine on the structural, surface morphology and optical properties of ZnO thin films
(Elsevier Science BV, 2007)The optical and structural properties of fluorine-doped Zinc oxide (ZnO) thin films have been investigated. The X-ray diffraction spectra indicate that the films have polycrystalline nature. A ZnO single phase with a ... -
Effects of In, Al and Sn dopants on the structural and optical properties of ZnO thin films
(Pergamon-Elsevier Science LTD, 2007)Effect of In, Al and Sn dopants on the optical and structural properties of ZnO thin films have been investigated by X-ray diffraction technique and optical characterization method. X-ray diffraction patterns confirm that ... -
Molecular recognition based iron removal from human plasma with imprinted membranes
(SAGE Publications LTD, 2006)The aim of this study is to prepare ion-imprinted poly(2-hydroxyethyl methacrylate) ( HEMA) based membranes which can be used for the selective removal of Fe3+ ions from Fe(3+)overdosed human plasma. N-methacryloyl-(L)-glutamic ... -
Iron removal from human plasma based on molecular recognition using imprinted beads
(Elsevier Science BV, 2005)The aim of this study is to prepare ion-imprinted polymers which can be used for the selective removal of Fe3+ ions from Fe3+-overdosed human plasma. N-Methacryloly-(L)-glutamic acid (MAGA) was chosen as the complexing ... -
Utilization of the Phaseolus vulgaris L. waste biomass for decolorization of the textile dye Acid Red 57: determination of equilibrium, kinetic and thermodynamic parameters
(Taylor & Francis Inc, 2007)In the present study, biosorption of Acid Red 57 (AR57) onto a waste biomass of Phaseolus vulgaris L. was investigated by varying pH, contact time, biosorbent concentration and temperature, to determine the equilibrium, ... -
Kinetics and equilibrium studies for the adsorption of Acid Red 57 from aqueous solutions onto calcined-alunite
(Elsevier Science BV, 2006)The adsorption of Acid Red 57 (AR57) onto calcined-alunite was examined in aqueous solution in a batch system with respect to contact time. pH and temperature. The first-order, pseudo-second-order Kinetic and the intraparticle ... -
Biosorption potential of Neurospora crassa cells for decolorization of Acid Red 57 (AR57) dye
(John Wiley & Sons LTD, 2006)Biosorption of Acid Red 57 (AR57) on to Neurospora crassa was studied with variation of pH, contact time, biosorbent and dye concentrations and temperature to determine equilibrium and kinetic models. The AR57 biosorption ... -
Biosorption kinetics and isotherm studies of Acid Red 57 by dried Cephalosporium aphidicola cells from aqueous solutions
(Elsevier Science Sa, 2006)Equilibrium, kinetics and thermodynamic studies on the removal of Acid Red 57 (AR57) by biosorption onto dried Cephalosporium aphidicola (C. aphidicola) cells have been investigated in a batch system with respect to pH, ... -
Electropolymerization of m-aminophenol on mild steel and its corrosion protection effect
(Elsevier Science Sa, 2007)Poly-m-aminophenol (PMAP) films were synthesized using cyclic voltammetric (CV), chronoamperometric (CA) and chronopotentiometric (CP) methods in basic hydro-alcoholic medium on mild steel (MS). The structure and properties ... -
Electrochemical and theoretical investigation on the corrosion of aluminium in acidic solution containing some Schiff bases
(Elsevier Science BV, 2006)The effect of newly synthesised three Schiff bases-2-[2-aza-2-(5-methyl(2-pyridly))vinyl]phenol, 2-[2-aza-2-(5-methyl(2-pyridly))vinyl]-4-bromophenol, 2-[2-aza-2-(5-methyl(2-pyridly))vinyl]-4-chlorophenol-on the corrosion ... -
Corrosion performance of self-doped sulfonated polypyrrole
(Elsevier Science Sa, 2006)Electrodeposition of sulfonated polypyrrole (SPPy) on 304-stainless steel (SS) was achived in fluorosulfonic acid (FSO3H)/acetonitrile medium using potentiostatic techniques. Adherent and homogeneous SPPy films were obtained. ... -
Spectroscopic determination of acid dissociation constants of some pyridyl-substituted 2-aminothiazole derivatives
(American Chemical Society, 2006)The acid dissociation constants, K-a, of nine biologically active 2-amino-4-(x-pyridyl)- thiazole, 2-methylimino-3-methyl- 4-(x-pyridyl)- 2,3-dihydrothiazole, and 2-methylamino-4-(x-pyridyl)- 2,3-dihydrothiazole were ... -
Anti-corrosive properties of polyaniline, poly(2-toluidine), and poly(aniline-co-2-toluidine) coatings on stainless steel
(Elsevier Science BV, 2007)This study examines the use of polyaniline (PANi), poly(2-toluidine) (PT), and poly(aniline-co-2-toluidine) (co-PT) for corrosion protection of 304-stainless steel (SS) in 0.5 M HCl solution. The PANi, PT, and co-PT coatings ... -
Hydrogen bonding and dimeric self-association of 2-pyrrolidinone: An ab initio study
(Kluwer Academic Publ, 1999)Ab initio calculations on the different associated structures of 2-pyrrolidinone with water and with itself were carried out using 3-21G and 6-31G(*) basis sets at the Hartree-Fock level, including electron correlation ... -
An investigation of the influence of the pairing correlations on the properties of the isobar analog resonances in A=208 nuclei
(Indian Academy Sciences, 2004)Within the quasi-particle random phase approximation (QRPA), the method of the self-consistent determination of the isovector effective interaction which restores a broken isotopic symmetry for the nuclear part of the ... -
Broadband staircase quantum well infrared photodetector with low dark current
(Elsevier Science BV, 2006)We present a theoretical investigation of a novel staircase-like quantum well infrared photodetector (QWIP). It detects wavelengths between 8.8 mu m and 12.3 mu m at an applied electric field of F= 6 x 10(4) V/cm at room ... -
FT-IR spectroscopic study on some 4-(3-cyclohexen-1-yl)pyridine Metal(II) tetracyanonickelate complexes
(Verlag Z Naturforsch, 2005)New Hofmann-type complexes in the form of M(4-Chpy)(2)Ni(CN)(4) [where 4-Chpy = 4-(3-cyclohexen-1-yl)pyridine and M = Ni, Co] were prepared in powder form, and their infrared spectra are reported in the range of 4000-400 ... -
Tunable long-wavelength broad band asymmetric quantum well infrared photodetector
(IOP Publishing LTD, 2007)We present a theoretical investigation of a GaAs/AlGaAs infrared detector consisting of three asymmetric quantum wells. Each well is designed to yield absorption and a photoresponse at peak wavelengths of 8.2 mu m, 9.5 mu ... -
The variation of electronic properties with the doping concentration of modulation-doped AlxGa1-xAs-GaAs double quantum wells
(Academic Press LTD Elsevier Science LTD, 2007)In this paper we have calculated the sub-band structure and the confinement potential of modulation-doped Ga1-xAlxAs-GaAs double quantum wells as a function of the doping concentration. The electronic properties of this ... -
Corrosion inhibition of stainless steel by polyaniline, poly(2-chloroaniline), and poly (aniline-co-2-chloroaniline) in HCl
(Elsevier Science Sa, 2006)Polyaniline (PANT), poly(2-chloroaniline) (PCIANi), and poly(aniline-co-2-chloroaniline) (co-PCIANi) films were synthesized by electrochemical deposition on 304-stainless steel (SS) from an acetonitrile solution. The ...