2.3.1. Description of the Bacterial Growth Curves
A modified four-parameter-Gompertz model was used (10).
1. Ordinary least squares: Statistical software STATISTICA 5.0. (STATISTICA for Windows [Computer program manual], Stat Soft Inc., 1995). For the algorithm of minimization of the loss function, the Rosenbrock/quasi-Newton procedure was applied.
2. Bootstrap method: SPSS 10 for Windows and S-PLUS 200. To plot the growth curves and also to estimate their parameters, the bootstrap method is used.
2.3.3. Analysis of the Variance (ANOVA) The statistical software MINITAB was used.
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