A modified extended UNIQUAC model for proteins

descriptionPublicationkeyboard_double_arrow_right Article 01 Aug 2004 English Publisher:Elsevier BVJournal:Fluid Phase Equilibria, volume 222-223, pages 127-133 (issn: 0378-3812,

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Authors: João A.P. Coutinho; Fernando L.P. Pessoa;

doi: 10.1016/j.fluid.2004.06.030

A modified extended UNIQUAC model for proteins

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Abstract

A modification of the extended UNIQUAC model is proposed for the description of the non-ideality of protein solutions. Here, the Staverman–Guggenheim combinatorial contribution used in extended UNIQUAC model is replaced by the Flory–Huggins term to take into account the size differences between the protein and solvent. This new model allows an excellent description of the activity coefficients in protein systems, for a large range of pH and ionic strengths, with a reduced number of parameters. © 2004 Elsevier B.V. All rights reserved.

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