Skip to main content

Table 1 Experimental range and levels of four selected variables for CCD optimisation in actual and coded factors

From: Evaluation of conventional and response surface level optimisation of n-dodecane (n-C12) mineralisation by psychrotolerant strains isolated from pristine soil at Southern Victoria Island, Antarctica

Factors

Name

Unit

Experimental value

− 2

− 1

0

+ 1

+ 2

X 1

pH

–

5.75

6.50

7.25

8.00

8.75

X 2

Temperature

°C

0.00

10.00

20.00

30.00

40.00

X 3

Diesel concentration

% (v/v)

− 0.50a

1.00

2.50

4.00

5.50

X 4

NaCl concentration

% (w/v)

− 1.00a

0.00

1.00

2.00

3.00

  1. aNegative value will be assumed as zero in actual experiment