Figure 1.

The normalized percent cell lysis (%) of bead beating for P. putida seeded sands with (A) 0.1 mm glass beads only, (B) mixture of 0.1 and 1.0 mm glass beads, and (C) mixture of 0.1, 1.0, and 4.0 mm glass beads, at various beating speed. Solid circles, open circles, and solid triangles depict the beating speed at 1500, 2500, and 3000 rpm, respectively. The average and error bars indicate the mean and standard deviation of triplicate measurements. All the data points in Figure 2 through 5 were obtained in the same manner.