Virial Coefficients
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Estudo de estados estáveis e não estáveis através da termodinâmica dos processos homogêneos em meios contínuos / Study of stable and unstable states using the thermodynamics of homogeneous processes in continuous media
O presente trabalho tem três metas principais: (1) usar as transformações de Levin para estimar coeficientes viriais e avaliar a qualidade das estimativas; (2) inserir adaptações, coerentes com as transformações de Levin, na equação original de van der Waals, de modo a aprimorar sua capacidade de se aproximar de dados experimentais para estados est�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2012
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2. Entropy variation in isothermal fluid flow considering real gas effects
Abstract The present paper concerns on the estimative of the pressure loss and entropy variation in an isothermal fluid flow, considering real gas effects. The 1D formulation is based on the isothermal compressibility module and on the thermal expansion coefficient in order to be applicable for both gas and liquid as pure substances. It is emphasized on the
J. Aerosp. Technol. Manag.. Publicado em: 2011-04
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3. Correlation of vapor - liquid equilibrium data for acetic acid - isopropanol - water - isopropyl acetate mixtures
A correlation procedure for the prediction of vapor - liquid equilibrium of acetic acid - isopropanol - water - isopropyl acetate mixtures has been developed. It is based on the NRTL model for predicting liquid activity coefficients, and on the Hayden-O'Connell second virial coefficients for predicting the vapor phase of systems containing association compon
Brazilian Journal of Chemical Engineering. Publicado em: 2006-03
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4. Estudo do equilibrio liquido-liquido, da partição de insulina e da pre-purificação da proteina de fusão precursora da insulina humana em sistemas aquosos bifasicos do tipo PEG/Sal / Study of liquid-liquid equilibrium, the partition of insulin and pre-purification of the fusion protein precursor of human insulin in aqueous biphasic systems of the type PEG / salt
In this work the primary purification of a fusion protein precursor of human insulin and produced by recombinant E. coli has been studied using aqueous two-phase systems. The fusion protein was provided by the pharmaceutical company Biobrás S.A (Montes Claros/Brazil) and was dissolved in 8M area. Partitioning essays of fusion protein were investigated in th
Publicado em: 2003
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5. Determinação experimental de dados de equilibrio liquido-vapor de misturas de solventes e compostos organo-clorados
This work is a contribution to the study of vapor-liquid equilibrium of pollutant substances, mainly solvents and pesticides. It was studied the vapor-liquid equilibrium of isobaric systems at the pressures of 250 and 650mmHg. The systems were formed by the combination of the binary mixtures of 1,2-Dichloroethane, Trichloroethylene and l-Butanol. The data we
Publicado em: 2001
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6. Avaliação de metodos de contribuição de grupos para uso em calculos de equilibrio liquido-vapor
A methodology for predicting vapour-liquid equilibrium curves using group contribution methods is proposed. From the molecular structure of the compound, values of normal boiling temperature, critical properties, acentric factor, second virial coefficients, vapor pressure, activity coefficients and molar liquid volume are required since they are necessary in
Publicado em: 1992
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7. QUANTUM CORRECTIONS TO THE THIRD AND FOURTH VIRIAL COEFFICIENTS USING THE 6:12 POTENTIAL*
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8. Effects of magnesium and ionic strength on the diffusion and charge properties of several single tRNA species.
The technique of laser light scattering was used to evaluate the effects of Mg+2 and ionic strength on the solution structures of seven tRNA species. Information about ion effects on both conformation and electric charge were derived from measurements of the translational diffusion constants and diffusive virial coefficients. E. coli tRNAMetf and six elongat