نتایج جستجو برای: thermodynamic equilibrium

تعداد نتایج: 164078  

2007
R. M. Kiehn

Irreversible processes can be described in Open non-equilibrium thermodynamic systems, of topological dimension 4. By means of Continuous Topological evolution, such processes can cause local decay to Closed non-equilibrium thermodynamic states, of topological dimension 3. These topologically coherent, perhaps deformable, regions or states of one or more components appear to "emerge" as compact...

2007
Chinghang Tong Shiang-Tai Lin Simon Clegg

Modeling atmospheric aerosols containing a large organic fraction with unknown chemical composition and properties has been a constant challenge. The dissertation focuses on the theoretical treatment of the thermodynamic equilibrium of atmospheric aerosol involving organic species. We present a vapor pressure estimation method, based on quantum chemistry methods, to predict the liquid vapor pre...

Journal: :Matter and Radiation at Extremes 2022

We present a simplified version of an average-atom collisional-radiative model employing both local-thermodynamic-equilibrium and isolated-ion atomic data. The simplifications introduced do not lead to any substantial errors, they significantly speed up calculations compared with the basic involving direct solution self-consistent-field equations. Average ion charges, charge state distributions...

2015
Tânia Sousa Tiago Domingos

The relation between Thermodynamics and Economics is a paramount issue in Ecological Economics. Two different levels can be distinguished when discussing it: formal and substantive. At the formal level, a mathematical framework is used to describe both thermodynamic and economic systems. At the substantive level, thermodynamic laws are applied to economic processes. In Ecological Economics, the...

Journal: :international journal of environmental research 2015
c.l. li s. wang f. ji j.j. zhang l.c. wang

the adsorption thermodynamic characteristic of cu2+ from aqueous solution onto humin andalso humic acid from a typical black soil in northeast china were examined at three different temperatures(298, 318 and 338 k) by batch isotherm experiments. results showed that humin was structurally differentfrom humic acid. the increase of temperature had a positive effect on the adsorption process. freun...

Journal: :journal of physical & theoretical chemistry 2013
s. ghasemlou h. aghaie m. monajjemi

hydroxyapatite nanocrystals were synthesized by sol-gel combustion method for the sorption ofhg(ii) ions from aqueous solutions. the effects of varying parameters such as ph, temperature, initialmetal concentration, and contact time on the adsorption process were examined. adsorptionequilibrium was established in 360 minutes and the maximum adsorption of hg(ii) on thehydroxyapatite was observed...

Journal: :Journal of molecular biology 2003
Claudia Höbartner Ronald Micura

We investigate 25-34 nucleotide RNA sequences, that have been rationally designed to adopt two different secondary structures that are in thermodynamic equilibrium. Experimental evidence for the co-existence of the two conformers results from the NH...N 1H NMR spectra. When compared to the NH...N 1H NMR spectra of appropriate reference sequences the equilibrium position is easily quantifiable e...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Marc Assmann Jean-Sebastian Tempel Franziska Veit Manfred Bayer Arash Rahimi-Iman Andreas Löffler Sven Höfling Stephan Reitzenstein Lukas Worschech Alfred Forchel

Bose-Einstein condensation (BEC) is a thermodynamic phase transition of an interacting Bose gas. Its key signatures are remarkable quantum effects like superfluidity and a phonon-like Bogoliubov excitation spectrum, which have been verified for atomic BECs. In the solid state, BEC of exciton-polaritons has been reported. Polaritons are strongly coupled light-matter quasiparticles in semiconduct...

Journal: :Inorganic chemistry 2008
Douglas A Vander Griend Daniel Kwabena Bediako Michael J DeVries Nathan A DeJong Lee P Heeringa

The molar absorptivity curves of the mono and bis nickel(II) complexes of 2,2'-bipyridine and 1,10-phenanthroline have been deduced from the composite absorbance data of a series of equilibrium solutions in methanol using equilibrium-restricted factor analysis, a technique for extracting spectral and thermodynamic information for component species involved in solution equilibria. The solutions ...

1998
Knut von Salzen K. Heinke Schlünzen

The accuracy and efficiency of the sectional multicomponent aerosol model SEMA, described in the first part of this paper, are tested. Comparisons of results of an equilibrium version of SEMA with results of the equilibrium models SEQUILIB and AIM show good agreement for relative humidities above 60% and thus validate the thermodynamic portion of the model. Tests of the dynamic portion of SEMA ...

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