FIGURE 4.

(A) Changes of the concentration of dissolved oxygen in the medium during the aerobic growth of CGMCC10064. Cultures of CGMCC10064 were incubated with agitation at 180 rpm. Samples were taken every 24 h and the concentration of dissolved oxygen was determined. (B) Extrusion of dissolved oxygen by purified EPS in aqueous solutions. The concentration of dissolved oxygen in EPS solutions with different content of purified EPS was detected as described in Section “Materials and Methods.” A trend line was drawn by exponential fitting and shown as gray curve. All the detections were performed in triplicate, and the average values are shown in the graphs.