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https://open.uns.ac.rs/handle/123456789/4314
Title: | Binary mixed micelles of triton X-100 and selected bile salts: Thermodynamic stabilization and pKa values of micellar bile acids | Authors: | Mihalj Poša Kosta Popović Dejan Ćirin Zita Farkaš Agatić |
Keywords: | Mixed micelles;Cooperative H-bond;Excess entropy;Excess Gibbs energy | Issue Date: | 1-Dec-2016 | Journal: | Journal of Chemical Thermodynamics | Abstract: | © 2016 Elsevier Ltd Bile acid anions are biosurfactants which form small micelles. To enhance the hydrophobic volume of the micelle, bile salts are used as mixed micelles with non-ionic surfactants. Micellar-bound bile acids (sodium-hyodeoxycholate, HD and sodium-cholate, C in binary mixed micelles with non-ionic surfactant Triton X-100) at concentration of 10 cmc have higher pKa values than bile acids from the aqueous solution. Different pKa values of micellar and non-micellar bile acids (ΔpKa) are due to the excess Gibbs energy GHAE which is a function of interaction coefficient and mole fraction of Triton X-100 in the binary surfactant mixture. In the mixed micelles ΔpKa values show synergistic interactions between different building units, similarly as interaction coefficient. | URI: | https://open.uns.ac.rs/handle/123456789/4314 | ISSN: | 219614 | DOI: | 10.1016/j.jct.2016.08.030 |
Appears in Collections: | MDF Publikacije/Publications |
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