Scientifica / 2018 / Article / Tab 5

Research Article

Optimization of Fermentation Conditions and Media for Production of Glucose Isomerase from Bacillus megaterium Using Response Surface Methodology

Table 5

The impact of variables and their interaction on glucose isomerase activity.

Y (enzyme activity)Coefficient valuesStand errors values

Constant0.2770.0022.697 × 10−13
X10.0060.0010.004
X40.0120.0017.016 × 10−5
X8−0.0040.0010.023
X12−0.0160.0030.001
X42−0.0100.0030.008
X82−0.0070.0030.036
X1·X40.0040.0020.041
X1·X80.0040.0020.041
X4·X8−0.0000.0020.942

Variables are encoded as follows: D-xylose concentration (X1), yeast extract concentration (X4), and cultivation temperature (X8).