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 |