Table 3 Analysis of variance (ANOVA) results for TPC1), TFC, DPPH of Hordeum vulgare L.

	R2	Model	Ethanol concentration (%)	Microwave power (W)	Extraction time (min)	Stationary point
TPC1)	0.9028	6.19**2)	7.94**	1.22	4.66**	Maximum
TFC	0.97	21.59***	42.02***	3.66*	6.09**	Saddle
DPPH	0.9063	6.45**	9.02**	1.17	2.8	Saddle

TPC, total polyphenol content; TFC, total flavonoid content; DPPH, DPPH radical scavenging activity.
*** p<0.001, ** 0.001<p<0.05, * 0.05<p<0.1.