Figure 5From: Immobilization of Acetobacter sp. CCTCC M209061 for efficient asymmetric reduction of ketones and biocatalyst recyclingStorage stability of free-cells and immobilized biocatalysts at 4 °C. Samples were withdrawn at various time intervals for determination reduction activities at 30°C using the 4′-chloroacetophenone substrate. Free cells (□), alginate-chitosan immobilized cells (○). Error bars show standard deviation from separate experiments conducted in duplicate.Back to article page