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Toplam kayıt 95, listelenen: 41-60
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Some physical properties of Cd1-xSnxS films used as window layer in heterojunction solar cells
(Pergamon-Elsevier Science LTD, 2009)CdS has been proved to be an ideal material for use as the window layer for heterojunction solar cells especially with n-CdS/p-CdTe. CdS, Cd0.9Sn0.1S and Cd0.8Sn0.2S films were deposited onto glass substrates at 300 degrees ... -
Determination of Adsorption and Kinetic Parameters for Synthesis of Isobutyl Acetate Catalyzed by Amberlite IR-122
(Taylor & Francis Inc, 2009)In the present study, the kinetics of esterification of acetic acid with isobutanol was studied by using Amberlite IR-122 as an acid catalyst. Experiments were carried out in a stirred batch reactor in dioxane at different ... -
In situ direct photoproduction of ketenes from substituted coumarins isolated in solid argon: The case of N-(2-oxo-2H-chromen-3-yl)acetamide
(Elsevier Science BV, 2009)In this study, the infrared spectrum of N-(2-oxo-2H-chromen-3-yl)acetamide (3-acetamidocoumarin; 3AC) isolated in solid argon, at 10 K, was obtained and assigned. In consonance with the relative energies of the three ... -
Effect of heat treatment on physical properties of CdO films deposited by sol-gel method
(Pergamon-Elsevier Science LTD, 2009)CdO film has been deposited by sol-gel spin coating method on the glass substrate and then the film has been annealed at 400, 500, 600 degrees C for 1 h. Effect of annealing temperature on the structural and optical ... -
Studies on solvatochromic behavior of some monoazo derivatives using electronic absorption spectra
(Pergamon-Elsevier Science LTD, 2009)The electronic absorption spectra of 2',4'-dihydroxy-2-methoxyazobenzene and 4,2',4'-trihydroxyazobenzene molecules have been investigated in solvents with different polarities. The solvent dependent UV-vis spectral shifts, ... -
Effect of deposition temperature on the crystalline structure and surface morphology of ZnO films deposited on p-Si
(2010)Zinc oxide (ZnO) films were deposited on p-Si substrates by sol-gel spin coating method. Zinc acetate dihydrate (ZnAc), 2-methoxyethanol and monoethanolamine (MEA) were used as a starting material, solvent and stabilizer, ... -
Electro-Fenton treatment of aqueous Clopyralid solutions
(Taylor & Francis LTD, 2010)The removal of Clopyralid (CLPYD) from aqueous solutions was performed by the electro-Fenton process in which hydroxyl radicals are produced electrocatalytically and used to degrade the persistent organic pollutants. The ... -
Characterization of a multilayer GaAs/AlGaAs broadband quantum well infrared photodetectors
(2010)In this study, we report on the investigation of two multilayer GaAs/AlGaAs quantum well infrared photodetectors designed for 8-12 µm spectral range detection. Fabricated devices were characterized by current-voltage and ... -
Dielectric Properties of Isotactic Polypropylene and Montmorillonite Nanocomposites
(IEEE, 2010)Polymer nanocomposites typically consist of inorganic particles dispersed in a polymer matrix. Layered-silicate-based polymer nanocomposites have great potential as low-cost, highperformance materials with various engineering ... -
Adsorption and solid phase extraction of 8-hydroxyquinoline from aqueous solutions by using natural bentonite
(Elsevier Science BV, 2010)The nitrogen-heterocyclic compound 8-hydroxyquinoline (8HQ) is one of the components of coal tar and has a wide variety of uses in industry. Because of its toxicity for aquatic organisms and harmful effects for human health, ... -
Hyperbolic Quaternion Formulation of Electromagnetism
(Springer Basel Ag, 2010)In this paper, after presenting the hyperbolic quaternion formalism, an alternative representational method is proposed for the formulation of classical and generalized electromagnetism in the case of the existence of ... -
Thermal, Optical Properties and Structural Investigation of Tm3+ doped TeO2-ZnO-TiO2 Glass System
(E D P Sciences, 2010)Tellurite based infrared glasses in the Tm3+ doped TeO2-ZnO-TiO2 system were prepared and its optical properties and crystallization kinetics investigated by using UV-VIS-NIR spectrophometer and differential thermal analysis ... -
Adsorption behavior of a textile dye of Reactive Blue 19 from aqueous solutions onto modified bentonite
(Elsevier Science BV, 2010)The aim of this study is to evaluate adsorption kinetics, isotherms and thermodynamic parameters of Reactive Blue 19 (RB19) onto modified bentonite from aqueous solutions. The effects of pH, contact time, initial dye ... -
MgxZn1-xO (x=0-1) films fabricated by sol-gel spin coating
(Pergamon-Elsevier Science LTD, 2010)MgxZn1-xO films were deposited onto the glass substrate by a sol-gel spin coating method. The drying and annealing temperatures were 300 and 500 degrees C in air. As x varies from 0 to 1, it was observed that the crystal ... -
Preparation of HDTMA-bentonite: Characterization studies and its adsorption behavior toward dibenzofuran
(Wiley, 2010)Bentonite is one of the most commonly used raw materials in the water treatment processes because of its low cost, easily availability and high mechanical and chemical stability. In this study, natural bentonite was modified ... -
Determination of Oxalate Ion in Bayer Liquor Using Electrochemical Method
(John Wiley & Sons, 2011)bauxite with caustic liquor and the subsequent precipitation of hydrated alumina [1]. Most bauxite contains organic compounds in various amounts. Depending upon the digestion conditions, 5-10% of the organic carbon is ... -
The Effects of System Interactions to the Natural Evolution of U Gem within the Context of X-Ray Data Analysis
(Astronomical Soc Pacific, 2011)In this study, we have undertaken an analysis of Chandra data of the dwarf nova type cataclysmic variable U Gem during quiescence and outburst. The data of U Gem, number 647 and 3767, which were obtained by the Chandra ... -
I-V characterization of a staircase quantum well infrared photodetector
(Wiley-V C H Verlag GMBH, 2011)In this work, a quantum well infrared photodetector structure which consists of three different well thicknesses with three different barrier compositions producing a staircase-like conduction band profile with the reputation ... -
Optical absorption and spectroscopic properties of thulium doped (TeO2)(Nb2O5)(TiO2) glasses
(Wiley-V C H Verlag GMBH, 2011)A type of thulium doped tellurite based optical glasses was prepared through conventional melt quenching technique. In the experiments, the effect of different Tm3+ ion concentration and glass composition on optical ... -
Longitudinal polar optical phonons in InN/GaN single and double heterostructures
(Wiley-V C H Verlag GMBH, 2011)Longitudinal optical phonon energy in InN epi-layers has been determined independently from the Raman spectroscopy and temperature dependent Hall mobility measurements. Raman spectroscopy technique can be used to obtain ...