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Table 3 Analysis of variance of response surface quadratic model for cellulase production

From: Carboxymethyl cellulase production optimization from newly isolated thermophilic Bacillus subtilis K-18 for saccharification using response surface methodology

Effect

SS

df

MS

F

P

Model

11.02376

14

0.787412

8.781174

0.000460

X1

0.495223

1

0.495223

5.522699

0.038484

X 21

0.079875

1

0.079875

0.890763

0.365539

X2

0.000630

1

0.000630

0.007027

0.934699

X 22

0.066383

1

0.066383

0.740296

0.407928

X3

0.227668

1

0.227668

2.538943

0.139376

X 23

0.061811

1

0.061811

0.689311

0.424052

X4

0.106695

1

0.106695

1.189860

0.298675

X 24

0.004848

1

0.004848

0.054070

0.820397

X1*X2

0.016194

1

0.016194

0.180592

0.679059

X1*X3

0.006181

1

0.006181

0.068927

0.797758

X2*X3

0.251767

1

0.251767

2.807690

0.121973

X1*X4

0.302941

1

0.302941

3.378387

0.093191

X2*X4

0.003314

1

0.003314

0.036958

0.851053

X3*X4

0.351152

1

0.351152

3.916025

0.073408

Error

0.986375

11

0.089670

  
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