background: recently, there has been a great concern about the consumption of dyes because of their toxicity, mutagenicity, carcinogenicity, and persistence in the aquatic environment. reactive dyes are widely used in textile industry. advanced oxidation processes are one of the cost-effective methods for the removal of these dyes. the main aims of this study were determining the feasibility of...

1. The authors use a polyexponential equation (equation 1) to describe the time course of the plasma concentrations of a drug in lieu of a compartmental interpretation suggested by Sheiner et al. As a consequence, the effect compartment can now contain any amount of a drug and is not limited to being “negligibly small” as postulated by Sheiner et al. 2. Sheiner et al. introduced keo as the firs...

polybrominated diphenyl ethers as flame retardants prevent the branching mechanism of free radicals in gas phase during the combustion. therefore, they are used in electric and electronical instruments. these supplies are entering the landfills after use. the existing flame retardants in these landfills enter the air, water and soil and pollute them. in this paper a mass-transfer model is devel...

This paper extends Thomson's multitaper spectrum estimation method [17] to nonstationary signals. The method uses a newly{derived set of basis functions which generalize the concentration properties of the prolate spheroidal waveforms [15] to the time{frequency case. We solve for the basis which diagonalizes the nonstationary spectrum generating operator over a nite region of the time{frequency...

background: the presence of heavy metals in the environment especially in water supplies have caused many concerns because of their toxicity and non-degradability. hexavalent chromium (cr) is one of the most toxic metals which is used in many industries, so it is essential to remove it from industrial wastewater. in this study, we made a comparison between different adsorption isotherms in the ...

The group of 2D materials contains almost all the elements of the periodic table. In contrast to the graphene sheet, they are abundant, this creates a variety of electronic properties including metals, semimetals, insulators and semiconductors. Band gaps of these materials are direct or indirect by ranging from ultraviolet to infrared, for this reason, have received much attention for nanoelect...

Ficus benjamina L. is indoor plant in temperate areas that is a tree species belongs to Moraceae family. Propagation of this plant is down by vegetative method. This study was conducted to evaluate the effect of IBA concentration and time of taking cutting on propagation of Ficus benjamina via stenting technique in Gorgan University of Agricultural Sciences and Natural Resources, in 2012. Treat...