Figure 1: (a) Response surface plot showing the effect of time (A) versus amount of enzyme (B) on the synthesis of nonyl caprylate with a fixed temperature at 40°C and shaking speed at 150 rpm. (b) Response surface plot showing the effect of time (A) versus temperature (C) on the synthesis of ethyl valerate with a the fixed amount of enzyme at 15.00 % (w/w) and shaking speed at 150 rpm. (c) Response surface plot showing the effect of time (A) versus shaking speed (D) on the synthesis of ethyl valerate with a fixed amount of enzyme 15.00 % (w/w) and temperature at 40°C.