FIG. 4.
Accumulation of Pseudomonas putida G7 cells in capillaries by chemotaxis to naphthalene (▴) or random motility (⋄). The initial bacterial concentration was 4 × 105 CFU/ml. The solid line is a solution to the bacterial-transport equation using the fitted random-motility coefficient, 3.0 × 10−6 cm2/s, and the dashed line is a solution to the equation using the fitted random-motility coefficient and the fitted chemotactic-sensitivity coefficient, 6.7 × 10−5 cm2/s. The error bars are 1 standard deviation of measurements from three capillaries. Naphthalene-saturated motility buffer was used in the capillaries for the chemotaxis experiment.