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Influence of sodium dodecyl sulfate on the characteristics of bovine serum albumin solutions and foams

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Journal of Surfactants and Detergents

Abstract

Results from surface tension measurements on mixed solutions of the protein bovine serum alburnin (BSA) and an anionic surfactant (SDS: sodium dodecyl sulfate) suggested that at an air-liquid interface, adsorption was affected by the protein-surfactant interaction and by the relative concentration of each component in solution. Two plateaus corresponding to the critical aggregation concentration (CAC) and the critical micelle concentration (CMC) of SDS, respectively, were observed in the surface tension isotherms of SDS in the presence of BSA. The CAC and CMC depended on the concentration of BSA. Effects of SDS concentration on the conformational changes of BSA were investigated by Fourier transform-Raman spectroscopy. The results showed that the contents of α-helix decreased while the contents of random coil increased. The presence of the anionic surfactant SDS had a negative influence on the way that proteins adsorb at an air-liquid interface, leading to the change of behavior of protein-stabilized film.

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Abbreviations

BSA:

bovine serum albumin

CAC:

critical aggregation concentration

CMC:

critical micelle concentration

FT-Raman:

Fourier transform-Raman spectroscopy

R :

mole ratio of [SDS]/[BSA]

SDS:

sodium dodecyl sulfate

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Authors and Affiliations

  1. Laboratory of Seperation Science and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, P.O. Box 353, 100080, Beijing, People's Republic of China

    Xiaofang Wei, Zhidong Chang & Huizhou Liu

Authors
  1. Xiaofang Wei
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  2. Zhidong Chang
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  3. Huizhou Liu
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Correspondence to Huizhou Liu.

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Wei, X., Chang, Z. & Liu, H. Influence of sodium dodecyl sulfate on the characteristics of bovine serum albumin solutions and foams. J Surfact Deterg 6, 107–112 (2003). https://doi.org/10.1007/s11743-003-0252-7

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  • DOI: https://doi.org/10.1007/s11743-003-0252-7

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