The direct conversion of methane to C2 hydrocarbons, in a quartz tube reactor enforced by a DC corona discharge, was investigated at atmospheric pressure. The process was carried out in the presence of metal oxide catalysts of Mn/W/SiO2, Mn/W/SiO2 (tetraethyl orthosilicate, TEOS), and Mn/W/CNT (supported on carbon nanotubes). The total yield to C2 hydrocarbons in the presence of metal oxide cat...

Prorenin is an inactive form of the aspartic protease renin. Like pepsinogen, it is activated at low pH. The kinetics of acid activation of prorenin were studied in human amniotic fluid and plasma and in preparations of purified prorenin isolated from amniotic fluid and plasma. Conversion of prorenin (pR) into active renin (R) appeared to be a two-step process involving the generation of an int...

an experiment was conducted in order to assess the effects of different levels of dietary canola meal (cm; 0, 10 and 20 %) and copper (0, 125 and 250 mg/kg) on performance, susceptibility to ascites syndrome and some blood metabolites of broiler chickens. during a six week period of experiment, a total of 495 male broilers (ross 308) were used in completely randomized design with a 3×3 factoria...

In this article we use three years (2001, 2002, and 2004) of Cluster plasma sheet data to investigate what happens to localized energy conversion regions (ECRs) in the plasma sheet during times of high magnetospheric activity. By examining variations in the power density, E ·J , where E is the electric field and J is the current density obtained by Cluster, we have studied the influence on Conc...

Prolonged cold storage of plasma may induce the conversion of plasma prorenin (inactive renin) to renin. This phenomenon is exaggerated in oral contraceptive (OC) users; the titer of Hageman factor (HF, Factor XII) in OC users is higher than in nonusers. The present study relates these observations. The increment in plasma renin activity (PRA) during cold storage, as measured by generation of a...

The plasma density profile plays a key role in the generation of 13.5 nm light for an extreme ultraviolet lithography (EUVL) source from laser-produced (LP) Sn-based plasmas due to the importance of opacity. We propose to characterize and optimize the plasma density profile to enhance conversion efficiency and mitigate debris using a double laser pulses technique. The basic idea is to separate ...