Islamic Azad university at Kashmar
Kashmar, Iran
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Kadijani M.N.,Islamic Azad university at Kashmar | Zaremoghaddam H.,Islamic Azad university at Kashmar
Journal of Fusion Energy | Year: 2012

In this paper, the propagation of dust-ionacoustic (DIA) waves in a magnetized collisionless complex (dusty) plasma consisting of superthermal electrons are investigated. In the discharge plasma, the electron temperature is usually much greater than ion temperature. Thus, the electron distribution function DF), is generally nonmaxwellian, has to be modeled. For this purpose, the generalized Lorentzian ( K)-DF is used to simulate the electron DF. Two types of modes (fast and slow DIA modes) exist in this plasma. By deriving Korteweg-de Vries (KdV) equation, using reductive perturbation method, both regions of solitary waves, rarefactive (dark) and compressive (bright) solitary waves, are allowed to be propagated in this plasma. Properties of DIA solitary waves are investigated numerically. How dust grains and superthermal electrons affect the sign and the magnitude of nonlinear coefficient of KdV equation is also discussed in detail. It is noted that the velocity, amplitude, and width of a DIA soliton is studied as well. © Springer Science+Business Media, LLC 2011.

Matinfar M.,University of Mazandaran | Zareamoghaddam H.,Islamic Azad university at Kashmar | Eslami M.,University of Mazandaran | Saeidy M.,Islamic Azad University
Computers and Mathematics with Applications | Year: 2012

There are verities of useful Krylov subspace methods to solve nonsymmetric linear system of equations. GMRES is one of the best Krylov solvers with several different variants to solve large sparse linear systems. Any GMRES implementation has some advantages. As the solution of ill-posed problems are important. In this paper, some GMRES variants are discussed and applied to solve these kinds of problems. Residual smoothing techniques are efficient ways to accelerate the convergence speed of some iterative methods like CG variants. At the end of this paper, some residual smoothing techniques are applied for different GMRES methods to test the influence of these techniques on GMRES implementations. © 2011 Elsevier Ltd. All rights reserved.

Hosseini-Bandegharaei A.,Islamic Azad university at Kashmar | Hosseini M.S.,Birjand University | Sarw-Ghadi M.,Islamic Azad university at Kashmar | Zowghi S.,Islamic Azad university at Kashmar | And 2 more authors.
Chemical Engineering Journal | Year: 2010

The paper presents a novel support for Cr(VI) sorption and its removal from wastewaters. The support is a new extratant-impregnated resin, EIR. Toluidine blue o as an extractant was impregnated onto/into Amberlite XAD-7 beads, and kinetics, equilibrium and thermodynamic aspects of Cr(VI) sorption were investigated. An eluent solution having concentration of 0.1 M respect to NH3 and NaCl was used for regenerating new EIR and the concentration of Cr(VI) was measured spectrophotometrically. The maximum adsorption of Cr(VI) on/in TBO-impregnated XAD-7 occurs at pH range of 3.0-4.0. The results obtained from equilibrium adsorption studies were fitted in Langmuir model of adsorption. The thermodynamic parameters of Cr(VI) adsorption onto/into EIR beads were estimated. The kinetic studies were showed that t1/2 was less than 5 min and equilibrium could be obtained in 50 min. The pseudo-second-order kinetics model fitted with kinetic data. It also was observed that after rapid saturation of surface and big pores, the intra-particle diffusion is the only mechanism of Cr(VI) sorption into new EIR. The performance of new EIR under flow conditions was also studied and the results indicate that columns packed with TBO-impregnated XAD-7 beads can be effectively used for treating wastewaters containing Cr(VI). © 2010 Elsevier B.V. All rights reserved.

Seyednour R.,University of Social Welfare and Rehabilitation Sciences | Chekaniazar V.,Islamic Azad university at Kashmar
Asian Journal of Animal and Veterinary Advances | Year: 2011

The aim of present study was to investigate the cellular phones emitted EMFs (Electromagnetic fields) effect on serum progesterone, cortisol and glucose concentration in exposed female hamsters. Seventy two female golden hamsters (mature and non-pregnant) were used. The animals were divided into three groups: group 1-the control group without any EMF exposure; group 2-the short-term EMF exposure (10 day, 3 h daily) and group 3-the long-term EMF exposure (60 day, 3 h daily). The 950 MHZ EMFs emitted by the antenna of cellular phones (Specify: ON, SAR: 0.60 week kg -1) was produced for short-or long-term (group 2 and 3), respectively. Exposing to 900 MHZ EMF caused decreases in progesterone (p<0.01) and increases in cortisol for both exposed groups (short-term and long-term) (p<0.01) in comparison with control group. Group exposed for 60 days had significantly higher blood glucose rate in comparison with control or short-term exposed groups. May, 950 MHZ EMFs caused stressful condition, cortisol releasing and subsequent hyper-glycemia in long-term exposing. Also, adrenal and reproductive glands may affect by 950 MHZ EMFs and caused changes in serum progesterone rate. It was concluded that short-or long-term exposure to 950 MHZ may cause progesterone suppressing and cortisol releasing but this frequency only in long-term exposure could cause hyper-glycemia in hamster as a laboratory model. © 2011 Academic Journals Inc.

Vakili R.,Islamic Azad university at Kashmar | Rashidi A.A.,Islamic Azad university at Kashmar
African Journal of Agricultural Research | Year: 2011

The objective of this experiment was to characterize the relationship between dietary fat and antioxidant supplementation on performance, fatty acids profile and lipid oxidation of thigh meat stored under refrigeration in broilers under heat stress. The chicks with a similar body weight were equally assigned to one of the two controlled-environment chambers from 21 to 56 day of age. The birds fed diets as: 1) basal diet supplemented with 5% saturated fatty acid, 2) basal diet supplemented with 5% unsaturated fatty acids (2% canola oil plus 3% fish oil); and 3) The second diet supplemented with antioxidant (100 IU vitamin E and 50 mg/kg zinc); that birds received this 3 diet in two temperature (22 and 32°C). Results showed that feed conversion ratio was not influenced by fat type, but on live body weight and feed Intake had significant effect (P<0.05). High environmental temperature showed deleterious effects including: reduction of feed intake, and live body weight and increasing of feed conversion ratio. Proportion of omega-6 to omega-3 (n-6/n-3) of thigh was increased and polyunsaturated fatty acids (PUFA) decreased in heat exposed and tallow-fed chicks. Whereas the proportion of omega-6 to omega-3 (n-6/n-3) of thigh was decreased and polyunsaturated fatty acids (PUFA) increased in chicks fed with canola and fish oils. Fat content and gross energy of thigh in heat exposed and canola and fish oils with antioxidant fed chicks were higher than other treatments. Proportion of omega-6 to omega-3 (n-6/n-3) of thigh was decreased and polyunsaturated fatty acids (PUFA) increased in chicks fed with canola and fish oils. Inclusion of canola and fish oils supplementations increased lipid oxidation of thigh muscle based on TBARA values. Thiobarbituric acid reaction substances (TBARA) values of thigh muscle in chicks fed canola and fish oils reared under heat stress was higher than other treatments. Increasing dietary antioxidants decreased TBARA values of thigh muscle. © 2011 Academic Journals.

Kadijani M.N.,Islamic Azad university at Kashmar | Zareamoghaddam H.,Islamic Azad university at Kashmar
Communications in Theoretical Physics | Year: 2013

In this paper an investigation into dust acoustic solitary waves (DASWs) in the presence of superthermal electrons and ions in a magnetized plasma with cold dust grains and trapped electrons is discussed. The dynamic of both electrons and ions is simulated by the generalized Lorentzian (κ) distribution function (DF). The dust grains are cold and their dynamics are studied by hydrodynamic equations. The basic set of fluid equations is reduced to modified Korteweg-de Vries (mKdV) equation using Reductive Perturbation Theory (RPT). Two types of solitary waves, fast and slow dust acoustic soliton (DAS) exist in this plasma. Calculations reveal that compressive solitary structures are possibly propagated in the plasma where dust grains are negatively (or positively) charged. The properties of DASs are also investigated numerically. © 2013 Chinese Physical Society and IOP Publishing Ltd.

Talebi R.,Islamic Azad University at Tehran | Safazade S.,Islamic Azad university at Kashmar
Journal of Materials Science: Materials in Electronics | Year: 2016

In the present study, for the first time lanthanum titanate (La2Ti2O7) nanoparticles were prepared via sol–gel auto-combustion method with the aid of lanthanum nitrate, tetra-n-butyl titanate and tyrosine. Tyrosine plays role as fuel, capping agent, and reductant in the synthesis of La2Ti2O7 nanoparticles. The formation of pure crystallized La2Ti2O7 nanocrystals occurred when the precursor was heat-treated at 700 °C in air for 150 min. The structural, morphological and optical properties of as-obtained products were characterized by techniques such as XRD, EDS, SEM, and UV–visible. The magnetic properties of as-prepared lanthanum titanate nanoparticles were also investigated with vibrating sample magnetometer. Furthermore, the photocatalytic properties of as-synthesized La2Ti2O7 were evaluated by degradation of methyl orange as water contaminant. © 2016 Springer Science+Business Media New York

Hosseini M.S.,Birjand University | Hosseini-Bandegharaei A.,Islamic Azad university at Kashmar
Journal of Hazardous Materials | Year: 2011

This paper reports the results obtained by studying the ion-exchange properties of a new solvent impregnated resin (SIR), which was prepared by impregnation of quinizarin (1,4-dihydroxyanthraquinone, QNZ) on Amberlite XAD-16 after nitration of the benzene rings present in its structure. The sorption behavior of Th(IV) and U(VI) on/in the modified SIR was compared with that of the SIR prepared via the conventional method. It was observed that sorption capacity and sorption rate of the modified SIR are significantly greater than the conventional one. The modified SIR was then applied to the extraction of Th(IV) and U(VI) ions at the presence of many co-existence metal ions. The results obtained denote on successful application of this new SIR to analysis of natural water samples spiked to Th(IV) and U(VI) ions. © 2011 Elsevier B.V.

Rahmani-Sani A.,Health Science University | Hosseini-Bandegharaei A.,Health Science University | Hosseini-Bandegharaei A.,Islamic Azad university at Kashmar | Hosseini S.-H.,Islamic Azad university at Kashmar | And 4 more authors.
Journal of Hazardous Materials | Year: 2015

In this work, the removal of uranium and thorium ions from aqueous solutions was studied by solid-liquid extraction using an advantageous extractant-impregnated resin (EIR) prepared by loading carminic acid (CA) onto Amberlite XAD-16 resin beads. Batch sorption experiments using CA/XAD-16 beads for the removal of U(VI) and Th(IV) ions were carried out as a function of several parameters, like equilibration time, metal ion concentration, etc. The equilibrium data obtained from the sorption experiments were adjusted to the Langmuir isotherm model and the calculated maximum sorption capacities in terms of monolayer sorption were in agreement with those obtained from the experiments. The experimental data on the sorption behavior of both metal ions onto the EIR beads fitted well in both Bangham and intra-particle diffusion kinetic models, indicating that the intra-particle diffusion is the rate-controlling step. The thermodynamic studies at different temperatures revealed the feasibility and the spontaneous nature of the sorption process for both uranium and thorium ions. © 2014 Elsevier B.V.

Hosseini M.S.,Birjand University | Hosseini-Bandegharaei A.,Islamic Azad university at Kashmar
Journal of Radioanalytical and Nuclear Chemistry | Year: 2010

A new chelating polymeric sorbent as an extractant impregnated resin (EIR) has been developed using eosin B and Amberlite IRA-410 resin. The impregnation process was characterized by FT-IR spectroscopy. The eosin B-impregnated resin showed superior binding affinity for Th(IV) over U(VI) and many co-existing ions. The influence of various physicochemical parameters on the recovery of Th(IV) were optimized by both static and dynamic methods. The Langmuir adsorption isotherm gave a satisfactory fit of the equilibrium data. The kinetic studies performed for Th(IV) sorption revealed that <20 min was sufficient for reaching equilibrium metal ion sorption. A preconcentration factor of 100 was found for the column-mode extraction. The accuracy of the developed method in conjunction with Arsenazo III procedure was tested by analyzing geological reference materials and seawater sample, which are prepared, synthetically. Furthermore, the above procedure has been successfully employed for the analysis of natural water samples. © 2009 Akadémiai Kiadó, Budapest, Hungary.

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