calculate some thermodynamic properties of molten polymers including specific volume and isothermal compressibility (s.m. hoseini, physical chemistry & electrochemistry, 2 (2014) 56-65). this work extended that eos to predict the volumetric properties of some molten ethylene copolymers including ethylene/1-octene, ethylene/1-butene (xethylene equal to 0.8543 and 0.563), ethylene/propene. the ab...

in this study, a temperature-dependent of the dispersion coefficients is calculated from equation state.the lennard-jones lj (12-6-3) effective pair potential function and simple thermodynamic argumentwith the input pvt data of liquid metals are used to calculate the dispersion coefficients. the dispersioncoefficients ( , , ) 3 6 12 c c c are found to be a linear function of 1/t1+α , where t is...

in this paper, we study different methods of solving joint redundancy-availability optimization for series-parallel systems with multi-state components. we analyzed various effective factors on system availability in order to determine the optimum number and version of components in each sub-system and consider the effects of improving failure rates of each component in each sub-system and impr...

the present study reports range extansion of moenkhausia oligolepis to the pindaré river drainage, of the mearim river basin, and itapecuru river basin, maranhão state, northeastern brazil. this species was previously known only from venezuela, guianas, and the amazon river basins. in addition, we present some meristic and morphometric data of the specimens herein examined and discuss on its di...

background & objectives: alloxan & streptozotocin are used for inducing diabetic models. their combination has been used to reduce the individual chemical dosage and minimize the side effects. present investigation was aimed at studying pre-diabetic clinical changes induced by low doses of alloxan-stz cocktail in rabbits. methods: new zealand white rabbits, 1-1.5 kg body weight, were a...

university websites play an important role in disseminating educational and research information to universities. they are a vital port for accessing the universities' scientific information for researchers, faculty members, and students. the goal of this study was to compare evaluation methods such as web assessment index (wai), web quality evaluation method (webqem), and webometrics for evalu...

marx as one of great philosophers of history believes that state is the temporal that is created of classes which finally don,t need to the presence and human historic period begins during decline of capitalism.this article only proceed the end of state after collapse of capitalism and discuss it in two parts one is proletarian dictatorship and after this course.we have shown that in two stages...