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Table 2 Experimental design and results of central composite design (CCD) for vanillin production

From: Statistically optimized production and characterization of vanillin from creosol using newly isolated Klebsiella pneumoniae P27

Run no.

Creosol (mL/L)

Yeast extract (g/L)

NH4NO3 (g/L)

Vanillin production (mg/L)

Experimental

Predicted

1

0.1

4

1

21.18

19.57

2

0.3

4

1

16.14

15.77

3

0.1

12

1

11.18

11.28

4

0.3

12

1

11.08

9.56

5

0.1

4

3

7.14

7.60

6

0.3

4

3

18.22

17.94

7

0.1

12

3

9.70

9.89

8

0.3

12

3

20

21.43

9

0.03

8

2

13.85

13.76

10

0.37

8

2

19.92

20.27

11

0.2

1.27

2

7.14

7.60

12

0.2

14.72

2

3.77

3.57

13

0.2

8

0.31

20.11

22.05

14

0.2

8

3.68

24.40

27.43

15

0.2

8

2

24.40

22.72

16

0.2

8

2

25

27.43

17

0.2

8

2

28.70

27.43

18

0.2

8

2

28.70

27.43

19

0.2

8

2

30.81

27.43

20

0.2

8

2

27

27.43