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Table 3 Coded and real values of variables selected for CCD

From: Optimization of chitinase production by a new Streptomyces griseorubens C9 isolate using response surface methodology

Variables

Unit

Levels

−2

−1

0

+1

+2

A: colloidal chitin

(%)

1

1.5

2

2.5

3

B: Syrup date

(%)

0

0.5

1

1.5

2

C: Yeast extract

(g/l)

0.05

0.15

0.25

0.35

0.45

D: PO4

(g/l)

1

1.25

1.5

1.75

2

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Annals of Microbiology

ISSN: 1869-2044

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