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  Effect of pH and electrolyte concentration on rising air bubbles in β-lactoglobulin solutions

Ulaganathan, V., Gochev, G., Gehin-Delval, C., Leser, M., Gunes, D., & Miller, R. (2016). Effect of pH and electrolyte concentration on rising air bubbles in β-lactoglobulin solutions. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 505, 165-170. doi:10.1016/j.colsurfa.2016.03.059.

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 Creators:
Ulaganathan, V.1, Author              
Gochev, G.1, Author              
Gehin-Delval, C., Author
Leser, M.E., Author
Gunes, D.Z., Author
Miller, R.1, Author              
Affiliations:
1Reinhard Miller, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863501              

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Free keywords: Rising bubble, β-lactoglobulin, pH effect, electrolyte concentration effect, dynamic adsorption layer, protein adsorption
 Abstract: The local velocity profile (LVP) of a rising bubble can serve as a fingerprint for the dynamic behavior of the adsorption/desorption processes going on at a solution/air interface. The LVP of bubbles in β-lactoglobulin (BLG) solutions proves to be extremely sensitive for the adsorption of BLG at low bulk concentrations. In addition, it can show the impact of pH and ionic strength on the dynamic surface properties of BLG at the solution/air interface. It is observed that the time for establishing an immobile rigid surface layer at the rising bubble surface becomes shorter with increasing pH from 3 to 7. A peculiar behavior is observed at the isoelectric point (IEP) where the LVPs show irregularities. Under dynamic conditions BLG does not exhibit highest surface active at the IEP within the range of BLG concentrations as measured by the rising bubble technique.

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 Dates: 2016-04-062016
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.colsurfa.2016.03.059
BibTex Citekey: Ulaganathan2016
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Title: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 505 Sequence Number: - Start / End Page: 165 - 170 Identifier: ISSN: 0927-7757