Table 3 Comparison of D-isoascorbyl palmitate conversion performance between ultrasound and mechanical shaking conditions
Items | Ultrasound | Mechanical shaking |
|---|---|---|
Reaction time (h) | 6 | 24 |
Temperature (°C) | 61 | 53 |
Substrate molar ratio (D-isoascorbic: palmitic acid) | 1:5 | 1:4 |
Enzyme load (w/w) | 9% | 20% |
Conversion (%) | 94.32 | 95.32 |
Productivity (g L-1 h-1) | 8.67 | 2.19 |
Conversion after enzyme reuse (8 cycles) | 40 | 15.02 |
Apparent maximum reaction rate (vmax) (mMh-1) | 25.64 | 9.01 |