Figure 8

Scanning electron micrographs of the Ca-alginate and alginate–chitosan beads containing Acetobacter cells . The surface view of Ca-alginate (A, ×100; C, ×10.0 k) and chitosan-coated beads (B, ×100; D, ×10.0 k); the inside view of Ca-alginate (E, ×10.0 k); cross-section of at the edge of an alginate-chitosan bead showing the peripheral membrane structure (F, ×2.00 k); free cells (G, ×10.0 k) and inside view of alginate-chitosan (H, ×1.00 k); Voltage: 10.0 kV.