Extracellular polymeric bacterial coverages as minimal area surfaces

Details Extracellular polymeric bacterial coverages as minimal area surfaces Extracellular polymeric bacterial coverages as minimal area surfaces

2005-07-09

arxiv.org/abs/physics/0507069v4

J. Colloid and Interface Science 304, 554 (2006).

Physics

Biological Physics

4 pages, 9 figures. v2: minor changes. v3: Terminology changes and extra references included. v4: Final version

Scientific paper

10.1016/j.jcis.2006.09.060

Surfaces formed by extracellular polymeric substances enclosing individual and some small communities of {\it Acidithiobacillus ferrooxidans} on plates of hydrophobic silicon and hydrophilic mica are analyzed by means of atomic force microscopy imaging. Accurate nanoscale descriptions of such coverage surfaces are obtained. The good agreement with the predictions of a rather simple but realistic theoretical model allows us to conclude that they correspond, indeed, to minimal area surfaces enclosing a given volume associated with the encased bacteria. This is, to the best of our knowledge, the first shape characterization of the coverage formed by these biomolecules, with potential applications to the study of biofilms.

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