Table 9 Analysis of variance of quadratic model for l-glutaminase production by Streptomyces pseudogriseolus ZHG20

Model

9

3,540,192

393,355

9.52

0.000

Significant

Linear

3

2,837,792

945,931

22.91

0.000

Significant

A

1

1,312,363

1,312,363

31.78

0.000

Significant

B

1

477,343

477,343

11.56

0.001

Significant

C

1

1,048,085

1,048,085

25.38

0.000

Significant

Square

3

231,333

77,111

1.87

0.147

A^a

1

39,660

39,660

0.96

0.332

B^a

1

130,849

130,849

3.17

0.081

C^a

1

102,058

102,058

2.47

0.122

2-way interaction

3

471,067

157,022

3.8

0.016

Significant

AB

1

156,319

156,319

3.79

0.057

Significant

AC

1

41,960

41,960

1.02

0.318

BC

1

272,788

272,788

6.61

0.013

Significant

Error

50

2,064,889

41,298

Lack-of-Fit

5

450,079

90,016

2.51

0.441

Nonsignificant

Pure Error

45

1,614,810

35,885

Total

59

5,605,081