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Bovine Serum Albumin Adsorption at a Polarized Water/1,2-Dichloroethane Interface with No Effect on the Ion Transfer Kinetics
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SYSNO ASEP 0558478 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Bovine Serum Albumin Adsorption at a Polarized Water/1,2-Dichloroethane Interface with No Effect on the Ion Transfer Kinetics Author(s) Trojánek, Antonín (UFCH-W) RID
Mareček, Vladimír (UFCH-W) RID
Samec, Zdeněk (UFCH-W) RID, ORCIDArticle number e202200409 Source Title ChemElectroChem. - : Wiley - ISSN 2196-0216
Roč. 9, č. 13 (2022)Number of pages 9 s. Language eng - English Country DE - Germany Keywords immiscible electrolyte-solutions ; beta-lactoglobulin ; protein solutions ; bsa ; casein ; dynamics ; behavior ; charge ; layers ; ph ; adsorption dynamics ; bovine serum albumin interfacial tension ; ion transfer kinetics ; water/1,2-dichloroethane interface Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA20-01589S GA ČR - Czech Science Foundation (CSF) GA22-32631S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFCH-W - RVO:61388955 UT WOS 000810206300001 EID SCOPUS 85131520144 DOI 10.1002/celc.202200409 Annotation Adsorption of bovine serum albumin (BSA) at a polarized water/1,2-dichloroethane (DCE) interface is examined by measuring the dynamic interfacial tension gamma at various cell potentials E, BSA concentrations and pH of the aqueous phase (w). An addition of BSA to the phase (w) results in an appreciable decay of gamma with time in the whole potential range available, which follows an induction period at the very beginning of the gamma transient. An analysis of the effect of the BSA concentration on the gamma transients enables to establish the adsorption isotherm, and to evaluate both the maximum surface excess concentration of BSA and the standard Gibbs energy of adsorption. An increase of the potential E results in an acceleration of the adsorption, and an increase of the surface excess concentration of the positively charged BSA at pH 2, while the latter effect is absent when BSA is charged negatively at pH 7.3. It is shown that the adsorbed BSA has a negligible effect on both the interfacial capacitance of the polarized water/DCE interface and the rate constant of the interfacial transfer of the tetraethylammonium (TEA(+)) or Cs+ ion measured at the corresponding standard ion transfer potential. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2023 Electronic address http://hdl.handle.net/11104/0332125
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