chemical vapor deposition (cvd) is one of the most popular methods for producing carbon nanotubes (cnts). the growth rate of cnts based on cvd technique is investigated by using a numerical model based on finite volume method. inlet gas mixture, including xylene as carbon source and mixture of argon and hydrogen as carrier gas enters into a horizontal cvd reactor at atmospheric pressure. in thi...

A prospective study was conducted to investigate the rate of group A streptococci (GAS) carriers and associated anti-streptolysin O (ASO) titers in serum samples in asymptomatic school children in spring in Duzce, Turkey. Pharyngeal swabs were obtained to detect the presence of GAS and blood samples were collected to determine elevated ASO titers in serum. A total of 351 asymptomatic primary sc...

Fermentation is the most time consuming step in the production of beer and therefore the effective use of fermentation vessels is a crucial element in brewing economy. One means of increasing the productivity of a batch process is to convert it to a continuous one. Experiments in continuous fermentation emerged during the 1950s and 1960s, but by the end of 1970s most of them had been closed dow...

Second generation biofuels, especially fuels from lignocellulose biomass, which are manufactured from non-food feedstock play a key role to reduce greenhouse gas emissions and the dependency on fossil oil. The bioCRACK process represents a new biomass-to-liquid concept to generate advanced biofuel by liquid-phase pyrolysis. As liquid heat carrier vacuum gas oil (VGO), an intermediate heavy oil ...

Abstract The feasibility of biphenyl hydrogenation with syngas for hydrogen purification and binding the aim its transportation was demonstrated. Specific features as a promising organic carrier using unsupported Ni–Mo sulfide catalysts were studied. In particular, influence temperature, reaction time, presence water in system, Н 2 /СО gas mixture composition on substrate conversion selectivity...

A numerical model was developed to predict gas-phase nucleation of particles during silane pyrolysis. The model includes a detailed clustering mechanism for the formation of hydrogenated silicon clusters containing up to ten silicon atoms. This mechanism was coupled to an aerosol dynamics moment model to predict particle growth, coagulation, and transport. Both zero-dimensional transient simula...