Table 3.

Analysis of variance for the physical, antioxidative and quality properties of the whole date seeds, powder and brew.

Source	df a	Sum of Squares
		Hardness (N)	MC (% d.b)	DPPH Radical Scavenging Activity (%)	Total Phenolic Contents (mg/100 mg DW)	Extraction Yield (g/g)	pH	Browning Index (Abs at 420 nm)
Regression model	5	18,430,349 ***	2.147 ***	6317.16 **	783,829,540 **	0.000082 **	2.82 **	0.014777 **
T	1	523,516 ***	0.0796 ***	219.71 **	53,783,177 *	0.000 *	0.05314 **	0.000608 **
t	1	325,687 ***	0.0954 ***	25.68 *	46,245,889 *	0.0000	0.05677 **	0.00003 **
T2	1	393,014 ***	0.02098 **	147.11 **	54,003,333 *	0.000001 **	0.02667 *	0.0000 **
t2	1	176,233 ***	0.00031	0.89	16,549,281	0.0000	0.000000	0.000428 **
T*t	1	124,237 ***	0.0494 ***	14.3	52,152,801 *	0.0000	0.05333 **	0.000017 **
Error	21	275,381	0.02863	105.81	168,965,129	0.000001	0.12667	0.00007
Lack−of−Fit	3	205,941	0.00763	100.5	156,858,804	0.000	0.000000	0.000048
Pure Error	18	69,440	0.02100	5.31	12,106,325	0.000001	0.12667	0.000023
Total	26	18,705,730	2.17525	6422.97	952,794,669	0.000083	2.94667	0.014848
R 2		0.985	0.987	0.983	0.823	0.969	0.987	0.957

^a degree of freedom; Significance level: *** p ≤ 0.001, ** p ≤ 0.01, * p ≤ 0.05.