Table 5 Box-Behnken test results of isolates.

From: Screening of cellulose-degrading bacteria and optimization of cellulase production from Bacillus cereus A49 through response surface methodology

Source

sum of squares

Df

Mean square

F value

P value Prob > F

Significant

Model

472.94

9

52.55

19.42

0.0004

Significant

A-substrate concentration

19.81

1

19.81

7.32

0.0304

*

B-inoculum volume

0.32

1

0.32

0.12

0.7395

 

C-temperature

11.05

1

11.05

4.08

0.0831

 

AB

1.25

1

1.25

0.46

0.5178

 

AC

3.48

1

3.48

1.29

0.2942

 

BC

1.55

1

1.55

0.57

0.4738

 

A2

70.61

1

70.61

26.09

0.0014

**

B2

197.86

1

197.86

73.12

 < 0.0001

**

C2

123.58

1

123.58

45.67

0.0003

**

Residual

18.94

7

2.71

   

Lack of fit

13.55

3

4.52

3.35

0.1365

Not significant

Pure error

5.39

4

1.35

   

Cor total

491.88

16

    
  1. *P < 0.05, significant difference; **P < 0.01, extremely significant difference.
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