Table 3 Response surface experimental factors and levels
From: Optimization of fermentation conditions for surfactin production by B. subtilis YPS-32
Code | Factor | Level | ||
|---|---|---|---|---|
-1 | 0 | 1 | ||
A | Temperature (℃) | 37 | 40 | 43 |
B | Time (h) | 39 | 45 | 51 |
C | MgSO4 (g·L− 1) | 0.3 | 0.35 | 0.4 |