Can I read A New Model for Predicting Activity Coefficients in Aqueous Solutions of Amino Acids and Peptides on EtoBox?

A New Model for Predicting Activity Coefficients in Aqueous Solutions of Amino Acids and Peptides by Soheil Mortazavi-Manesh; Cyrus Ghotbi; Vahid Taghikhani is a Chemical Engineering article available to read on EtoBox.

What is A New Model for Predicting Activity Coefficients in Aqueous Solutions of Amino Acids and Peptides about?

A new two-parameter model based on the perturbation of a hard-sphere reference has been developed to correlate the activity coefficients of several amino acids and simple peptides in aqueous solutions. The hard-sphere equation of state used as the reference in the model was proposed recently by Ghotbi and Vera. The perturbation terms coupled with the reference hard-sphere equation of state are attributed to the dispersion forces and the dipole-dipole interactions. The Lennard-Jones and Keesom potential functions are used to represent the dispersion and dipole-dipole interactions, respectively. The results of the new model are compared with those obtained by other models. It is shown that the new model can more accurately correlate the activity coefficients of amino acids and peptides in comparison with the other available models in the literature. The model was also used to correlate the solubility of several amino acids in aqueous solutions. The results show that the model can accurately correlate the solubility of the experimental data over a wide range of temperatures with only two adjustable parameters. New values for Gibbs free energy change, Dg, and enthalpy change, Dh, of th

Who reads A New Model for Predicting Activity Coefficients in Aqueous Solutions of Amino Acids and Peptides?

Author

Soheil Mortazavi-Manesh; Cyrus Ghotbi; Vahid Taghikhani

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9614)

Published

2003

Language

EN

Field

Chemical Engineering (Physical Sciences)