Evaluation of infinite dilution activity coefficients of various liquid pollutants in water

Şerifoğlu, E. Irmak


Evaluation of the radiative recombination mechanism in Si nanocrystals embedded in silica matrix
Righini, Marcofabio; Gnoli, Andrea; Razzari, Luca; Serincan, Ugur; Turan, Raşit (American Scientific Publishers, 2008-02-01)
We report measurements of the temperature dependence of photoluminescence (PQ life-time and efficiency of Si nanocrystals (Si-Nc) embedded in silica matrix. We use a practical technique based on lock-in acquisition that allows us to simultaneously evaluate, at each emission-energy, intensity and decay-time of the detected signal. Samples are prepared by Silicon-ion implantation in a SiO2 layer followed by thermal annealing. The implantation dose of Si ions ranges between 2 x 10(16) cm(-2) and 2 x 10(17) cm(...
Determination of trapping parameters of thermoluminescent glow peaks of semiconducting Tl2Ga2S3Se crystals
IŞIK, MEHMET; YILDIRIM, TACETTİN; Hasanlı, Nızamı (2015-07-01)
Thermoluminescence (TL) properties of Tl2Ga2S3Se layered single crystals were researched in the temperature range of 290-770 K. U glow curve exhibited two peaks with maximum temperatures of similar to 373 and 478 K. Curve fitting, initial rise and peak shape methods were used to determine the activation energies of the trapping centers associated with these peaks. Applied methods were in good agreement with the energies of 780 and 950 meV. Capture cross sections and attempt-to-escape frequencies of the trap...
Analysis of parameters of coaxial dielectric barrier discharges in argon flow at atmospheric pressure
Li, Hui; Yuan, Chengxun; Kudryavtsev, Anatoly; Astafiev, Aleksandr; Bogdanov, Evgeny; Katircioglu, T. Yasar; Rafatov, İsmail (2021-04-01)
This work deals with the numerical and experimental investigation of atmospheric pressure dielectric barrier discharges (DBDs). In the experiment, the current and voltage of DBD sustained in an argon flow in coaxial discharge cell are measured. Numerical models are based on the drift-diffusion theory of gas discharges. Different modelling approaches, where the electron kinetics is determined on the basis of the Maxwellian electron energy distribution function (EEDF), vs models with more realistic EEDF obtai...
Şener, Özgün; ATALAY, OĞUZ; ATASOY, MERT; Kayran, Altan (2018-11-15)
Transverse shear moduli of the sandwich core and flexural stiffness of all-composite sandwich constructions are determined with three-point beam bending tests, and compared with the analytical and finite element analysis solutions. Additionally, Digital Image Correlation (DIC) system is employed to validate the experimental results by monitoring the displacements. The effect of orientation of the composite core material with respect to the beam axis on the shear modulus of the core material itself, flexural...
Evaluation of latent heat of solidification of grey cast iron from cooling curves
Çetin, Asude; Kalkanlı, Ali (2005-01-01)
The temperature history in the casting obtained from cooling curves can be used to determine some information related to latent heat release during alloy solidification. This work presents a procedure for the evaluation of latent heat of primary and eutectic solidification of grey cast iron from cooling curves based upon the Newtonian cooling principle. The thermal data obtained from quik-cups are processed with the Mathcad code in order to obtain the cooling curve, its first and second derivatives and the ...
Citation Formats
E. I. Şerifoğlu, “Evaluation of infinite dilution activity coefficients of various liquid pollutants in water,” Middle East Technical University, 1994.