Table 6.

Analysis of variance for the quadratic polynomial model of GLA content produced by Cunninghamella bainieri 2A1.

Source	Polynomial coefficients	Sum of squares	DF	Mean square	F value	Prob > F
Model		8.534E − 004	5	1.707E − 004	27.81	0.0002**
Intercept	0.49
X 1	4.121E − 003	1.359E − 004	1	1.359E − 004	22.14	0.0022**
X 2	6.432E − 003	3.310E − 004	1	3.310E − 004	53.93	0.0002**
X 1 2	2.600E − 003	4.703E − 005	1	4.703E − 005	7.66	0.0278*
X 2 2	−5.900E − 003	2.422E − 004	1	2.422E − 004	39.46	0.0004**
X 1 X 2	−4.000E − 003	6.400E − 005	1	6.400E − 005	10.43	0.0145*
Residual		4.295E − 005	7	6.136E − 006
Lack of fit		3.215E − 005	3	1.072E − 005	3.97	0.1081
Pure error		1.080E − 005	4	2.700E − 006

^*Statistically significant at 95% probability level.

^**Statistically significant at 99% probability level.

X ₁: aeration rate (vvm); X ₂: agitation rate (rpm); X ₁ ² and X ₂ ²: the quadratic terms; X ₁ X ₂: the interaction term.

R ² = 0.9521.