Fig. (2) Linear anamorphoses of Verhulst logistic function to determine the kinetic parameters of the α and β curves by the Desulfovibrio piger Vib-7. Data points indicate experimental data and solid lines indicate the theoretical regression line to t. R2 is the coefficient of determination. The adequacy of the approximation model corresponds to a 1% significance level Fisher's exact test (F-test). Initial concentration of bacterial cells: –■– 0.12±0.011, –●– 0.25±0.024, –▼– 0.5±0.048, and –▲– 1.0±0.096 mg/ml.