FIG. 3.

Photomicrographs of attached bacteria on microcarrier surfaces. The microcarriers (0.1 g) were incubated for 4 h with 1.5 ml of bacterial solution (D₆₀₀ = 0.83) in 0.01 M phosphate buffer and then stained with 0.1% safranin. (a) DEAE = cellulose; (b) DEAE = Sephadex; (c) AG 1 = X8.