Table 3.

Estimated regression coefficients of the adjusted second-order polynomial equation and analysis of variance (ANOVA) of the model.

	Phloretin (µg/g d.w.)		Phloridzin (µg/g d.w.)		Sum of Phenolic Compounds (µg/g d.w.)		DPPH (mg TE/g d.w.)		ABTS (mg TE/g d.w.)		FRAP (mg TE/g d.w.)
	Effect	p Value	Effect	p Value	Effect	p Value	Effect	p Value	Effect	p Value	Effect	p Value
β0	7.0078	0.0002 **	39.4685	0.0000 **	1002.6926	0.0001 **	1.4592	0.0001 **	3.1865	0.0001 **	2.1070	0.0000 **
Linear
β1	3.3139	0.0050 *	19.0022	0.0001 **	232.7921	0.0133 *	−0.7016	0.0038 **	−0.9157	0.0062 *	−0.6934	0.0020 **
β2	3.8383	0.0042 **	20.4948	0.0001 **	125.9876	0.0480 *	0.3551	0.0163 *	0.6771	0.0124 *	0.5599	0.0034 **
β3	4.0193	0.0038 **	22.0404	0.0001 **	270.0492	0.0111 *	0.0799	0.2238	1.1331	0.0045 **	0.7087	0.0021 **
Quadratic
β11	3.3347	0.0027 **	18.0086	0.0000 **	306.7966	0.0042 **	1.2519	0.0007 **	1.4344	0.0014 **	1.4025	0.0003 **
β22	1.4400	0.0142 *	5.4554	0.0005 **	513.1239	0.0015 **	0.2026	0.0241 *	0.3789	0.0192 *	0.3890	0.0034 **
β33	3.1693	0.0030 **	18.1889	0.0000 **	427.9818	0.0022 **	0.4479	0.0051 *	0.6529	0.0066 *	0.3515	0.0041 **
Crossed
β12	−2.7004	0.0149 *	−18.5412	0.0001 **	16.7476	0.7054	−0.1766	0.1032	0.0368	0.7532	−0.2264	0.0352 *
β13	0.5730	0.2282	2.7210	0.0069 *	117.2224	0.0927	0.0615	0.4233	−0.3261	0.0858 *	−0.5643	0.0059 *
β23	0.1538	0.6903	−1.5058	0.0219 *	384.5743	0.0098 *	−0.5103	0.0143 *	−1.0383	0.0096 *	−0.9035	0.0023 **
R2 model	0.9739		0.9999		0.9706		0.9644		0.9585		0.9883
p model	0.0433 *		0.0430 *		0.0198 *		0.0005 **		0.0489 *		0.0114 *
p lack of fit	0.1937		0.3547		0.1657		0.1201		0.1223		0.0666

* Significant at p < 0.05; ** significant at p < 0.005.