نتایج جستجو برای: chemical gas

تعداد نتایج: 602938  

2000
PETER BERCZIK

A new Chemo Dynamical Smoothed Particle Hydrodynamic (CD SPH) code is presented. The disk galaxy is described as a multi fragmented gas and star system, embedded in a cold dark matter halo. The star formation (SF) process, SNII, SNIa and PN events as well as chemical enrichment of gas have been considered within the framework of the standard SPH model. Using this model we describe the dynamical...

2004
Michael A. Matthews Thomas A. Davis Jason Crews

This is an investigation of a gas/solid chemical reaction between steam and chemical hydrides that liberates pure hydrogen gas. The aim is to obtain fundamental kinetic, chemical, and thermodynamic data on the reaction so that sufficient information is known to evaluate this technology rigorously for its potential as a means of delivering hydrogen for fuel cells and internal combustion engines....

2000
Simone Recchi Francesca Matteucci Annibale D’Ercole

We study the effect of a single, instantaneous starburst on the dynamical and chemical evolution of a gas-rich dwarf galaxy, whose potential well is dominated by a dark matter halo. We follow the dynamical and chemical evolution of the ISM by means of an improved 2-D hydrodynamical code coupled with detailed chemical yields originating from type II SNe, type Ia SNe and single low and intermedia...

2004
A. Tawfik

We confront the lattice results on QCD phase diagram for two and three flavors with the hadron resonance gas model. Taking into account the truncations in the Taylor-expansion of energy density ǫ done on the lattice at finite chemical potential μ, we find that the hadron resonance gas model under the condition of constant ǫ describes very well the lattice phase diagram. We also calculate the ch...

This research was conducted in order to determine chemical composition, gas production parameters, in vitro digestibility and ruminal degradability of Acroptilon repens at different phonological stages (vegetative, flowering and seeding) and its comparison with alfalfa hay and wheat straw in Completely Randomized Design. For this purpose, Acroptilon repens was prepared in three stages of growth...

2008
Yong Sun Won Young Seok Kim Timothy J. Anderson Lisa McElwee-White

Chemistry of Materials is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Article Computational Study of the Gas Phase Reactions of Isopropylimido and Allylimido Tungsten Precursors for Chemical Vapor Deposition of Tungsten Carbonitride Films: Implications for the Choice of Carrier Gas Yong Sun Won, Young Seok Kim, Timothy J. Anderson, and Lisa McElw...

1999
Peter Berczik

A new Chemo–Dynamical Smoothed Particle Hydrodynamic (CD-SPH) code is presented. The disk galaxy is described as a multi–fragmented gas and star system, embedded in a cold dark matter halo with a rigid potential field. The star formation (SF) process, SNII, SNIa and PN events, and the chemical enrichment of gas, have all been considered within the framework of the standard SPH model, which we u...

2004
Jozef Markoš

Ecological aspects of coal combustion utilization of CO2 from flue gas Slovakia belongs to the group of twenty worst polluters throughout the world, releasing 10 12 tons of carbon dioxide per capita, whereas the worldwide average value is about 5 tons. It is known that the big electric and thermal power stations produce only 25 % of the overall production of carbon dioxide in Slovakia, whereas ...

2000

Mixed radioactive and chemical wastes stored in tanks across the DOE complex generate hydrogen, ammonia, nitrous oxide, and nitrogen by a complex series of radiolytic and thermolytic reactions. Flammable conditions may result when these gases accumulate in the dome space of the waste tanks. A phenomenological model was developed that successfully predicts gas generation rates for many of Hanfor...

Mohammedi Rouzbahani, Maryam, Nikeghbali Sisakht, Nader, Sabzalipour, Sima,

Refineries produce about four percent of the global carbon dioxide emissions, close to one billion tons per year. Globally, the refining sector is the third largest producer of carbon dioxide after the electricity generation and cement industry.This greenhouse gases is a major cause of global warming and climate change and is a serious threat to human health and the environment. One way to redu...

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