DYNAMIC INSTABILITY AND NONEQUILIBRIUM PATTERNS DURING THE GROWTH OF ESCHERICHIA-COLI

The diffusion controlled growth morphology and kinetics of E.coli colo nies under different experimental conditions, have been studied. Fract al dimension is calculated by box counting method and found to be 1.55 +/- 0.03. A transition from Eden-like to smooth spreading colony patt erns was observed. Influence of vitamins, H2O2, antibiotics and Bacill us subtillis on growth behaviour has been studied. Burst morphologies in E.coli and phthalic acid are observed similar to diffused growth in hepatocellular carcinoma and black sea fan. Vitamin C and vitamin B c omplex showed stimulatory effect to some extent while oxytetracyclin a nd H2O2 inhibited the growth of the microorganism, E. coli and Bacillu s subtilis, grow independently when cocultivated on the same plate.