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Table 2 Plackett–Burman experimental design matrix PB16 (real and coded values) with their respective responses (enzymatic activity)

From: Marine-derived fungus Aspergillus cf. tubingensis LAMAI 31: a new genetic resource for xylanase production

Run

pH

ASW (%)

Variablesa,b

Inoculum (pellet)

Xylanase (U/mL)

(NH4)2SO4

Peptone

SB

WB

RS

Sucrose

Xilan

1

7 (+1)

0 (−1)

0 (−1)

0 (−1)

60 (+1)

0 (−1)

0 (−1)

20 (+1)

0 (−1)

3 (+1)

16.1

2

7 (+1)

100 (+1)

0 (−1)

0 (−1)

0 (−1)

60 (+1)

0 (−1)

0 (−1)

20 (+1)

3 (+1)

45.1

3

7 (+1)

100 (+1)

4 (+1)

0 (−1)

0 (−1)

0 (−1)

60 (+1)

0 (−1)

20 (+1)

1 (−1)

1.8

4

7 (+1)

100 (+1)

4 (+1)

20 (+1)

0 (−1)

0 (−1)

0 (−1)

20 (+1)

0 (−1)

1 (−1)

2.4

5

5 (−1)

100 (+1)

4 (+1)

20 (+1)

60 (+1)

0 (−1)

0 (−1)

0 (−1)

0 (−1)

3 (+1)

0

6

7 +1)

0 (−1)

4 (+1)

20 (+1)

60 (+1)

60 (+1)

0 (−1)

0 (−1)

20 (+1)

1 (−1)

494.4

7

5(−1)

100 (+1)

0 (−1)

20 (+1)

60 (+1)

60 (+1)

60 (+1)

0 (−1)

0 (−1)

1 (−1)

109.3

8

7 (+1)

0 (−1)

4 (+1)

0 (−1)

60 (+1)

60 (+1)

60 (+1)

20 (+1)

0 (−1)

1 (−1)

290.5

9

7 (+1)

100 (+1)

0 (−1)

20 (+1)

0 (−1)

60 (+1)

60 (+1)

20 (+1)

0 (−1)

3 (+1)

38.3

10

5 (−1)

100 (+1)

4 (+1)

0 (−1)

60 (+1)

0 (−1)

60 (+1)

20 (+1)

20 (+1)

3 (+1)

15.3

11

5 (−1)

0 (−1)

4 (+1)

20 (+1)

0 (−1)

60 (+1)

0 (−1)

20 (+1)

20 (+1)

3 (+1)

83.1

12

7 (+1)

0 (−1)

0 (−1)

20 (+1)

60 (+1)

0 (−1)

60 (+1)

0 (−1)

20 (+1)

3 (+1)

501.9

13

5 (−1)

100 (+1)

0 (−1)

0 (−1)

60 (+1)

60 (+1)

0 (−1)

20 (+1)

20 (+1)

1 (−1)

51.3

14

5 (−1)

0 (−1)

4 (+1)

0 (−1)

0 (−1)

60 (+1)

60 (+1)

0 (−1)

0 (−1)

3 (+1)

50.3

15

5 (−1)

0 (−1)

0 (−1)

20 (+1)

0 (−1)

0 (−1)

60 (+1)

20 (+1)

20 (+1)

1 (−1)

86.5

16

5 (−1)

0 (−1)

0 (−1)

0 (−1)

0 (−1)

0 (−1)

0 (−1)

0 (−1)

0 (−1)

1 (−1)

0

17 (C)

6 (0)

50 (0)

2 (0)

10 (0)

30 (0)

30 (0)

30 (0)

10 (0)

10 (0)

2 (0)

370.2

18 (C)

6 (0)

50 (0)

2 (0)

10 (0)

30 (0)

30 (0)

30 (0)

10 (0)

10 (0)

2 (0)

246.7

19 (C)

6 (0)

50 (0)

2 (0)

10 (0)

30 (0)

30 (0)

30 (0)

10 (0)

10 (0)

2 (0)

319.8

20 (C)

6 (0)

50 (0)

2 (0)

10 (0)

30 (0)

30 (0)

30 (0)

10 (0)

10 (0)

2 (0)

381.0

  1. The experiments were conducted at 28 °C and 140 rpm
  2. c central point, SB sugarcane bagasse, WB wheat bran, RS rice straw
  3. a In parenthesis coded values
  4. b Plackett–Burman values in g/L