Subcritical Water Extraction of Chlorella pyrenoidosa: Optimization through Response Surface Methodology

Table 5

ANOVA for the regression model for the prediction of oil yield.

Source	Coefficient estimate	d.f.	Standard error	Sum of squares	Mean square	F-value	P-value	Remark
Model		9		0.020	2.277E-003	15.21	0.0001	Significant
A	0.058	1	8.154E-003	7.563E-003	7.563E-003	50.53	< 0.0001
B	7.131E-003	1	7.782E-003	1.257E-004	1.257E-004	0.84	0.3811
C	-0.021	1	5.944E-003	1.912E-003	1.912E-003	12.77	0.0051
A^2	1.794E-005	1	9.764E-003	5.055E-010	5.055E-010	3.378E-006	0.9986
B^2	-0.029	1	9.665E-003	1.387E-003	1.387E-003	9.27	0.0124
C^2	-8.669E-003	1	0.011	1.011E-004	1.011E-004	0.68	0.4304
AB	0.015	1	0.016	1.322E-004	1.322E-004	0.88	0.3695
AC	-0.016	1	0.017	1.379E-004	1.379E-004	0.92	0.3597
BC	-0.029	1	0.016	4.930E-004	4.930E-004	3.29	0.0996
Residual		10		1.497E-003	1.497E-004
Lack of fit		5		1.221E-003	2.443E-004	4.43	0.0639	Not significant
Pure error		5		2.754E-004	5.509E-005
Cor total		19		0.022
Adeq. Prec.	14.788