A simple analytical model is presented for the removal of stream-borne contaminants by hyporheic exchange across duned or rippled streambeds. The model assumes a steady-state balance between contaminant supply from the stream and first-order reaction in the sediment. Hyporheic exchange occurs by bed form pumping, in which water and contaminants flow into bed forms in high-pressure regions (down...

Biochemical reaction databases capture the sum of human knowledge of biochemical reactions and chemical compounds. As the amount of data available on metabolic reactions and chemical substrates increases, the necessity of central repositories increases as well. Unfortunately, there is no established algorithm for being able to calculate the degree of similarity between reactions in different da...

background and purpose: this study aimed to evaluate the relationship between organizational structure and organizational performance from the perspective of the staff of 115 emergency departments of mazandaran province, iran. materials and methods: in this study, data were collected from the emergency personnel of different hospitals of mazandaran province, iran in 2014. moreover, data on two ...

We have developed a microfluidic device system for the continuous producing of nanoparticles, and we have clarified the relationship between the mixing performance of reactors and the particle size. First, we evaluated the mixing performance of reactors by carrying out the Villermaux–Dushman reaction and determined the experimental conditions for producing AgCl nanoparticles. Next, we produced ...

the paper aims at investigating the effects of chemical reaction and thermal radiation on the steady two-dimensional laminar flow of viscous incompressible electrically conducting micropolar fluid past a stretching surface embedded in a non-darcian porous medium. the radiative heat flux is assumed to follow rosseland approximation. the governing equations of momentum, angular momentum, energy, ...

Twenty five plus trees of dek were selected from agro-climatic regions Haryana, Punjab and Uttrakhand. The on the basis different characters economic importance viz. straightness, clear bole height, self-pruning ability, acute branch angle etc. Among all maximum tree height was observed in MC21 (17.9 m) whereas, minimum MC3 (6.5 m). girth at breast (gbh) varied 60.9 to 180.8 cm recorded highest...

Under the effects of electric field and chemical reaction, a mathematical model has been developed to study the dispersion of aerosols in a couple stress fluid flowing through a channel which is analytically solved using Taylor disper¬sion model. The solutions for velocity, concentration distribution and dispersion coefficient are numerically computed and the results are represented graphically...