FIG. 4.
Impact of the drastic reduction in the DOC level on development of nascent P. fluorescens biofilms attached to the Ge crystal. After 3 h of inoculation (dashed line), nascent biofilms were exposed to LB medium (165 mg DOC/liter) (experiment a) and dechlorinated sterile tap water (2.8 mg DOC/liter) (experiment b) under flow conditions. The solid line represents the nonlinear regression fit determined only for the data set for the 3-h inoculation period of experiment a using the equation A = Amax(1 − e−kt) (k = 0.24 h−1; regression coefficient R2 = 0.997). a.u., arbitrary units.