Optimization of Aqueous Extraction Conditions of Inulin from the Arctium lappa L. Roots Using Ultrasonic Irradiation Frequency

Table 1

Table of ANOVA for the experimental variables as linear, quadratic, and interaction terms of each response variable.

Source	DF	Inulin yield		Total phenols		IC50
		Mean square	value	Mean square	value	Mean square	value
Model	9	9.20		17.83	0.0025	2.78 × 10^5
Linear
b1	1	59.19		43.90	0.0011	4.51 × 10^5
b2	1	2.68	0.0001	14.91	0.012	29804.6	0.0139
b3	1	4.55		25.49	0.0037	4.21 × 10^5
Quadratic
b11	1	4.40	0.008	46.07	0.001	6.72 × 10^5
b22	1	9.77		30.89	0.0024	1.03 × 10^6
b33	1	0.064	0.092	0.55	0.483	459.38	0.664
Interaction
b12	1	0.64	0.001	0.30	0.60	2751	0.311
b13	1	0.15	0.0029	14.54	0.019	36	0.902
b23	1	0.34	0.0041	12.36	0.038	9506.25	0.041
Lack of fit	3	0.022	0.086	1.60	0.061	3661	0.092
Pure error	2	0.0026		0.018		226.23
R^2	—	0.997		0.971		0. 995
R^2 adjusted	—	0.992		0.918		0.988