In this paper the scaling behaviour of the surface of Escherichia coli and Bacillus subtilis colonies growing on agar plates are studied. We present the first experimental evidence for the self-affine fractal nature of the shape of a biological system. The value H≃0.78 we obtained for the roughness exponent H describing the scaling of the surface width indicates that the development of the surface is subject to correlations due to the complexity of bacterial colony formation.
|Number of pages||7|
|Journal||Physica A: Statistical Mechanics and its Applications|
|Publication status||Published - Aug 15 1990|
ASJC Scopus subject areas
- Statistics and Probability
- Condensed Matter Physics