Soft-particle model analysis of effect of LPS on electrophoretic softness of Acidithiobacillus ferrooxidans grown in presence of different metal ions

The effect of surface lipopolysaccharides (LPS) on the electrophoretic softness and fixed charge density in the ion-penetrable layer of Acidithiobacillus ferrooxidans cells grown in presence of copper or arsenic ions have been discussed. The electrophoretic mobility data were analyzed using the soft...

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Bibliographic Details
Published in:Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2009-02, Vol.69 (1), p.1-7
Main Authors: Chandraprabha, M.N., Modak, J.M., Natarajan, K.A.
Format: Article
Language:English
Subjects:
Acidithiobacillus - cytology
Acidithiobacillus - drug effects
Acidithiobacillus - growth & development
Acidithiobacillus ferrooxidans
Adaptation, Physiological - drug effects
Arsenic - pharmacology
Copper - pharmacology
Electrophoresis
Lipopolysaccharide
Lipopolysaccharides - pharmacology
Metals - pharmacology
Models, Biological
Polysaccharides - metabolism
Soft-particle model
Surface potential
Surface Properties - drug effects
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Summary:The effect of surface lipopolysaccharides (LPS) on the electrophoretic softness and fixed charge density in the ion-penetrable layer of Acidithiobacillus ferrooxidans cells grown in presence of copper or arsenic ions have been discussed. The electrophoretic mobility data were analyzed using the soft-particle electrophoresis theory. Cell surface potentials of all the strains based on soft-particle theory were lower than those estimated using the conventional Smoluchowski theory. Exposure to metal ions increased the surface electrophoretic softness with decrease in the fixed charge density. Effect of cell surface lipopolysaccharides on the model parameters are investigated and discussed.
ISSN:0927-7765
1873-4367
DOI:10.1016/j.colsurfb.2008.10.006