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Table 3 Experimental range and coded levels employed in the response surface methodology (RSM) using the Box–Behnken design for increasing the production of β-glucosidase enzymes by B. subtilis RA10

From: Bioprospecting of novel thermostable β-glucosidase from Bacillus subtilis RA10 and its application in biomass hydrolysis

 

Process variable

Range and level

− 1

0

+ 1

A

Paddy straw (%, w/v)

1

2

3

B

Beef extract (%, w/v)

0.1

0.25

0.4

C

PEG 6000 (%, v/v)

0.1

0.25

0.4

D

NaNO3 (%, w/v)

0.1

0.25

0.4