Peran Perempuan dalam Pelestarian Lingkungan Hidup Menurut Tinjauan Islam

This paper will try to examine how Islamic ideas about women's role regard to environmental conservation. It is based on assumptions about the reality of society that no longer getting friend with environment. In other words, the environment is not an important consideration in development. As the result, the issue of environment has become a major problem, even become a serious global concern. The Qur'an has informed that Allah is the Preserver or the Conservationist, whereas human are actors who do damage to the ecosystem of the environment, although they do not aware of their and claiming that they are doing environmental conservation. However, the Qur'an asserts that the preservation of the environment requires the active participation of human. This is because of human and environment has a strong mutual symbiosis. The Qur'an commands man to do Salah or ishlah and prohibits to do fasad or ifsad

Analysis of temperature variations in fixed-bed columns using non-isothermal and non-equilibrium transport model

A non-isothermal and non-equilibrium two-component lumped kinetic model of fixed-bed column liquid chromatography is formulated with the linearized isotherm and solved analytically to study the influence of temperature variations on the process. The model equations constitute a system of convection-diffusion PDE for mass and energy balances in the bulk phase coupled with differential equations for mass and energy balances in the stationary phase. The analytical solutions are derived for Dirichlet boundary conditions by implementing the Laplace transformation, Tschirnhaus-Vieta approach, the linear decomposition technique and an elementary solution technique of ODE. An efficient and accurate numerical Laplace inversion technique is applied to bring back the solution in the actual time domain. In order to validate the derived analytical solutions for concentration and temperature fronts, the high resolution upwind finite volume scheme is applied to approximate the model equations numerically. Various case studies are carried out assuming realistic model parameters. The results obtained will be beneficial for interpreting mass and energy profiles in non-equilibrium and non-isothermal liquid chromatographic columns and provide deeper insight into the sensitivity of the separation process without performing costly and time-consuming laboratory experiments