Time-course of the response of C. piscicola to phenol. These experimental results (points) were fitted (lines) to equation (A2). The phenol concentrations (D) were given in g/l. The central graph -which collects all the results, omitting experimental points-allows to detect the restriction of the stimulatory response (negative R) throughout the time to a small domain of low doses.
Murado and Vázquez BMC Microbiology 2010 10:220 doi:10.1186/1471-2180-10-220