From: Process optimization for mass production of 2,3-butanediol by Bacillus subtilis CS13
Factors | Mean square | Coefficient estimate | Standard error | F value | P value |
---|---|---|---|---|---|
Model | 572.55 | 121.46 | 0.86 | 92.13 |  < 0.0001 |
X1: Sucrose | 1288.45 | − 11.35 | 0.79 | 207.34 |  < 0.0001 |
X2: Ammonium citrate | 311.36 | 5.58 | 0.79 | 50.10 |  < 0.0001 |
X3: MgSO4·7H2O | 209.58 | 4.58 | 0.79 | 33.73 | 0.0002 |
X1X2 | 39.74 | 2.23 | 0.88 | 6.39 | 0.0299 |
X1X3 | 4.10 | 0.72 | 0.88 | 0.66 | 0.4353 |
X2X3 | 14.55 | − 1.35 | 0.88 | 2.34 | 0.1569 |
X12 | 559.24 | − 14.26 | 1.50 | 89.99 |  < 0.0001 |
X22 | 264.94 | − 9.82 | 1.50 | 42.63 |  < 0.0001 |
X32 | 83.35 | − 5.51 | 1.50 | 13.41 | 0.0044 |
Lack of Fit | 7.40 | Â | Â | 1.47 | 0.3410 |
R2 = 0.9881 | R2 (adj) = 0.9774 |  | R2 (Pred) = 0.9054 |  |  |