In this work, the effects of operative parameters on CH4, CO2, O2, and N2 membrane gas separation for poly (4-methyl-1-pentane) (PMP) membrane modified by adding nanoparticles of TiO2, ZnO, and Al2O3 are assessed and investigated. The operative parameters were type and percentage of nanoparticles, and cross membrane pr...

In this paper, we explore magneteoelectricity of rare earth orthochromites from the symmetry point view. We determine principal structural order parameters and find their couplings with ferroelectric magnetic orderings. Our calculations showed that electric dipole moments emerge in vicinity Cr3+ ions unit cell RCrO3 due to displacements oxygen highly symmetric positions parent perovskite phase ...

Grinding is finishing process aimed at achieving surface quality and dimensional accuracy in workpieces with tight tolerances especially from materials with a high degree of hardness and strength. The grinding process of superalloys is faced with problems and challenges caused by the generation of excessiveheatas well as the adhesion of workpiecematerialon the grinding tool. Therefore, in-depth...

In this research, the effects of important parameters, including the molar ratio of acetic acid to sulfur(S) , sonication time, temperature, and hydrogen the molar ratio of peroxide to sulfur on the performance of ultrasound-assisted oxidative desulfurization were studied using the response surface method (RSM). To this end, a model fuel containing n-decane and dibenzothiophene at a concentrati...

BACKGROUND: Fertilizer management is one of the most important factors in successful cultivation of crops affecting yield quality and quantity. Growth analysis is still the most simple and precise method to evaluate the contribution of different physiological processes in plant development. OBJECTIVES: Current research was conducted to evaluate effect of ...

In this paper, a series of Pd/CeO2 catalysts prepared by different synthesis routes and showing morphological textural properties have been investigated for passive NOx adsorption (PNA) applications. The results obtained adsorption/desorption tests demonstrated that storage capacity efficiency materials depend strictly on their surface area, whereas the morphology support Pd deposition method d...

In the laser cutting process some well-known parameters, e.g. laser power and cutting speed, play major roles in the performance of the process. Each parameter or a combination of parameters can affect the material removal volume and cutting volume efficiency. The purpose of this research is to study the effect of power and maximum cutting speed on the material removal rate (MRR) and cutting vo...