Extraction and determination of naproxen from human plasma were performed using Vortex-Assisted Inverted Dispersive Liquid-Liquid MicroExtraction (VA−IDLLME) and High-Performance Liquid Chromatography (HPLC). The parameters affecting extraction recovery such as type and volume of extraction and disperser solvents, pH of sample solution, stirring rate, extraction time and salt addition were ...

We consider the problem of optimal distribution a limited amount conductive material in systems governed by local and non-local scalar diffusion laws. Of particular interest for these problems is study limiting case, which appears when available driven to zero. Such process both theoretical practical continues be subject active study. In optimization convex has well understood basis pursuit str...

<p style='text-indent:20px;'>In the present paper, we study diffusion limit of classical solution to Vlasov-Poisson-Fokker-Planck (VPFP) system with initial data near a global Maxwellian. We prove convergence and establish optimal rate strong VPFP towards drift-diffusion-Poisson based on spectral analysis precise estimation layer.</p>

in [1] we uniquely introduced ultra exponential functions (uxpa) and denednext step of the serial binary operations: addition, multiplication and power.also, we exhibited the topic of limit summability of real functions in [2,3]. inthis paper, we study limit summability of the ultra exponential functions andprove some of their properties. finally, we pose an unsolved problem aboutthem.

In recent years, in Iran and other countries the power systems are going to move toward creating a competition structure for selling and buying electrical energy. These changes and the numerous advantages of DGs have made more incentives to use these kinds of generators than before. Therefore, it is necessary to study all aspects of DGs, such as size selection and optimal placement and impact o...

We investigate structures recognizable by finite state automata with an input tape of length a limit ordinal. At limits, the set of states which appear unboundedly often before the limit are mapped to a limit state. We describe a method for proving nonautomaticity and determine the optimal bounds for ranks of linear orders recognized by such automata.

in this paper we study two important concepts, i.e. the direct andthe inverse limit of hyperstructures associated with fuzzy sets of type 2, andshow that the direct and the inverse limit of hyperstructures associated withfuzzy sets of type 2 are also hyperstructures associated with fuzzy sets of type 2.