Dynamic instability and non-equilibrium patterns during the growth of <i>E.coli</i>

Abstract

The diffusion controlled growth morphology and kinetics of <em>E.coli</em> colonies under different experimental conditions, have been studied. Fractal dimension is calculated by box counting method and found to be 1.55 &plusmn; 0.03. A transition from Eden-like to smooth spreading colony patterns was observed. Influence of vitamins, H₂O₂, antibiotics and <em>Bacillus subtillis</em> on growth behaviour has been studied. Burst morphologies in <em>E.coli</em> and phthalic acid are observed similar to diffused growth in hepatocellular carcinoma and black sea fan. Vitamin C and vitamin B complex showed stimulatory effect to some extent while oxytetracyclin and H₂O₂ inhibited the growth of the microorganism. <em>E coli</em> and <em>Bacillus subtilis</em>, grow independently when cocultivated on the same plate.