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Table 2 Statistical analysis of the FCCD for 2,3-BD production by B. subtilis CS13

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    1.47 0.3410
R2 = 0.9881 R2 (adj) = 0.9774   R2 (Pred) = 0.9054