TABLE 3.

The antioxidant activity of hydrogels.

Method		HEa-EtOH	HEa-iPrOH	HEa-WA	H-CON
DPPH	mg Trolox/g hydrogel	3.43 ± 0.01a	3.52 ± 0.02a	3.15 ± 0.01a	na
ABTS		10.05 ± 0.19b	12.35 ± 0.28c	7.58 ± 0.30a	na
TC	mg GA/g hydrogel	9.02 ± 0.14b	11.43 ± 0.14c	4.89 ± 0.29a	na

DPPH, antioxidant activity measured using 2,2-diphenyl-1-picrylhydrazyl; ABTS, antioxidant activity measured using 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid); TC, total polyphenol content; GA, gallic acid; HEa-EtOH, hydrogel containing dry ethanolic extract of E. angustifolium; HEa-iPrOH, hydrogel containing dry isopropanol extract of E. angustifolium; HEa-WA, hydrogel containing dry water extract of E. angustifolium; H–CON, hydrogel without E. angustifolium extract. na—no activity. Different letters indicate significant differences between the HEas, α = 0.05. Values are the mean of three replicate determinations (n = 3).