Measuring the enthalpies of interaction between glycine, L-cysteine, glycylglycine, and sodium dodecyl sulfate in aqueous solutions

被引:0
作者
V. G. Badelin
I. N. Mezhevoi
E. Yu. Tyunina
机构
[1] Russian Academy of Sciences,Krestov Institute of Solution Chemistry
来源
Russian Journal of Physical Chemistry A | 2017年 / 91卷
关键词
enthalpy of solution; amino acid; dipeptide; sodium dodecyl sulfate; hydrophobic interaction; aqueous solution;
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摘要
Calorimetric measurements of enthalpies of solution ΔsolHm for glycine, L-cysteine, and glycylglycine in aqueous solutions of sodium dodecyl sulfate (SDS) with concentrations of up to 0.05 mol kg–1 are made. Standard enthalpy of solution ΔsolH0 and enthalpy of transfer ΔtrH0 of the dipeptide from water into mixed solvent are calculated. The calculated enthalpy coefficients of paired interactions of amino acids and dipeptide with SDS prove to be positive. Hydrophobic interactions between the biomolecules and SDS are found to have a major impact on the enthalpies of interaction in the three-component systems under study, within the indicated range of concentrations.
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页码:521 / 524
页数:3
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