Figure 1From: The last generation of bacterial growth in limiting nutrientUnder nitrogen or glucose limitation growth rate declines in a sharp manner. E. coli was grown in M9 minimal medium with the indicated concentrations of nitrogen (in the form of NH4Cl) (a+b) or glucose (c+d). Panels a+c show OD measurements (600Â nm) at a time resolutions of 3Â min under nitrogen or glucose limitation respectively. Each point in the graph represents the average OD of 48 experimental replicas with standard error on the order of ~2% at each time-point. Panels b+d show the growth rate (1/hr) of each OD curve respectively (growth rate is the logarithmic derivative of the OD signal).Back to article page