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Table 1 Ranges of variable used for CCD

From: Characterization of Actinomycetes and Trichoderma spp. for cellulase production utilizing crude substrates by response surface methodology

Coded level

Variable

−2

−1

0

1

2

CMC (g/l)

8

10

12

14

16

KH2PO4 (g/l)

1

2

3

4

5

Peptone (g/l)

0.5

1.5

2.5

3.5

4.5

pH

3

4

5

6

7

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