This paper presents the results of studies on the influence of oxygen partial pressure (vacuum level in the chamber) on the properties of FeAl intermetallics. One of the problems in the application of classical methods of prepared Fe-Al intermetallic is the occurrence of oxides. Applying a vacuum during sintering should reduce this effect. In order to analyze the effect of oxygen partial pressu...

High temperature electrical conductivity and Seebeck coefficient measurements were performed on the quadruple perovskites La2Ba,Cu,Sn201i, Eu2Ba2Cu,Ti,011, and La2Ba2Cu2Ti,0,, . A transition from nto p-type semiconductivity is observed for La2Ba2Cu2Sn2011 as a function of oxygen partial pressure. However, both electrons and holes contribute to the electrical properties over the entire range of ...

We study a carbon-supported palladium-based catalyst during the hydrogenation of ethylene to ethane in wide range partial pressures and hydrogen.

Commercially available gases contain residual impurities leading to a background oxygen partial pressure of typically several 10 bar, independent of temperature. This oxygen partial pressure is inappropriate for the growth of some single crystals where the desired oxidation state possesses a narrow stability field. Equilibrium thermodynamic calculations allow the determination of dynamic atmosp...

A brief survey is giveen of the effects of different pressures on living organisms. Highoxygen partial pressures inhibit oxidative metabolism and, according to Gersehman, have effects which summate at some point with the effects of radiation. In a study of the mechanism of the narcotic effect of inert gases, it was found that high pressures of nitrogen and argon, but not helium, act like other ...

A brief survey is giveen of the effects of different pressures on living organisms. Highoxygen partial pressures inhibit oxidative metabolism and, according to Gersehman, have effects which summate at some point with the effects of radiation. In a study of the mechanism of the narcotic effect of inert gases, it was found that high pressures of nitrogen and argon, but not helium, act like other ...

The short-range order in water and ice was determined from experimentally measured partial radial distribution functions by applying the Quasi Crystalline Model (QCM). Partial were analyzed for at several pressures temperatures, crystalline ice, three known phases of amorphous ice: Low-Density Amorphous (LDA), High-Density (HDA), Very-High-Density (VHDA). It found that low temperatures pressure...

[Purpose] The purpose of this study was to investigate the amount of plantar pressures on the lower limb during tilt table standing and to indicate the ideal degree of tilting for partial weight bearing. [Subjects and Methods] Fifteen healthy subjects between the ages of 20 and 30 were recruited as volunteers for this study. All the measurements were taken while standing on a tilt table accordi...

The present paper reports measurements carried out in a centrifugal compressor equipped with double row of low solidity partial vane diffuser. Performance of the compressor is measured with three sets of double row diffusers with different radial spacing between the diffusers. From these measurements best configurations are identified and static pressures on the diffuser walls and probe measure...

In this paper, Ni/Al and La-Ni/Al catalysts were prepared with a co-impregnation method and employed in carbon dioxide methanation reaction. The catalytic results showed that the catalyst with (10wt.%) of lanthanum and (20wt.%) nickel had the highest activity at low temperatures in CO2 methanation and the La-Ni/Al catalysts changed the reaction path by lowering its activation energy and consequ...