Güncel Gönderiler: Fen Fakültesi
Toplam kayıt 2379, listelenen: 1341-1360
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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 ... -
Preconcentration of copper using double-imprinted polymer via solid phase extraction
(Elsevier Science BV, 2006)The aim of this study is to prepare double-imprinted polymers which can be used for the selective removal of Cu(II) ions from synthetic waters. Chitosan-succinate (CS) was choosen as the metal complexing polymer. In the ... -
Phosphorus-nitrogen compounds: New spiro-cyclic phosphazene derivatives. Structure of 4 ',4 ',6 ',6 '-tetrachloro-3,4-dihydro-3-(3-methylpyridin-2-yl)-spiro-[1,3,2-benzoxazaphosphinine-2,2 '-(2 lambda(5),4 lambda(5),6 lambda(5)-cyclotriphosphazene)]. Part XII
(Elsevier Science BV, 2005)The condensation reactions of [N-[(2-hydroxyphenylmethyl)amino]-methylpyridines (5-8) with trimer, N3P3Cl6, have been afforded partially substituted novel spiro-cyclic phosphazene derivatives (9-12) (Scheme 1). Compounds ... -
The effect of the pairing interaction on the energies of isobar analogue resonances in Sb112-124 and isospin admixture in Sn100-124 isotopes
(IOP Publishing LTD, 2004)In the present study, the effect of the pairing interaction and the isovector correlation between nucleons on the properties of the isobar analogue resonances (IAR) in Sb112-124 isotopes and the isospin admixture in Sn100-124 ... -
Gamow-Teller 1(+) states in Bi-208
(Amer Physical Soc, 2005)The properties of the Gamow-Teller (GT) 1(+) states in Bi-208 have been investigated by using the Pyatov-Salamov method. The GT resonance (GTR) energy, the contribution of the GTR beta transition strength to the Ikeda sum ... -
Self-consistent calculations of isospin admixtures in the ground states of the N = Z nuclei in the mass region of 50-100
(Elsevier Science BV, 2007)In the present study, based on spherical shell-model wave functions and energies with the pairing and the residual Fermi interaction treated in pn QRPA, the isospin admixture probabilities in the ground state of N = Z ... -
Prediction of the acidities of organic bases in aqueous solution using AM1 COSMO solvation model
(Elsevier Science BV, 2000)Potentially tautomeric pyrazole-3-ones were studied, in order to predict their tautomeric equilibrium constants and pK(a) values, using the semiempirical AM1 COSMO solvation model at the SCF level in aqueous solution. Syn ...
