Table 4 Regression co-efficient results from the data of CCD (central composite design) experiments for GABA (γ-aminobutyric acid) production

Constant

−11610.2273

7.0788

−1.6401

0.13201

Glucose (g)

14807.0455

6.1864

2.3935

0.03773

MSG (g)

−4357.9545

6.1864

−0.7044

0.49723

IP (days)

344.9384

0.1289

2.6764

0.02324

Glucose × MSG

2020.0000

3.4034

0.5935

0.56602

Glucose × IP

−81.2500

0.0709

−1.1459

0.27852

MSG × IP

102.9167

0.0709

1.4515

0.17729

Glucose × glucose

−5967.2727

1.9198

−3.1083

0.01109

MSG × MSG

112.7273

1.9198

0.0587

0.95433

IP × IP

127.5000

0.0008

−4.5147

0.00112