Fig. 7

Changes in the final quantification of the slope when applying the linear regression approach. The linear regression approach is indicated by LRG. The results highly depend on whether the progress curve has a short lag phase (a) or a long lag phase (b) as compared to the linear phase and whether both phases or only the linear part is considered. The numbers in the legend indicate the respective start and stop times (in min) used for the linear approximations and the resulting activity calculated. The model outcome (A _mod ) was based on the full progress curve. The activity calculated through the linear regression approach and the model as well as their 95% confidence interval are indicated on the graph