Table 3.

Antioxidant activities of the crude aqueous extracts and fractions of the fruits of F. deltoidea

Antioxidant assays	SF (var. angustifolia)			BF (var. kunstleri)			Quercetin
	SFC	SFE	SFW	BFC	BFE	BFW
DPPH radical scavenging activity, IC50 (μg/ml)	111.20 ± 4.77a	678.18 ± 22.31b	195.75 ± 12.19c	150.25 ± 3.05d	499.93 ± 5.10e	148.02 ± 2.25d	11.76 ± 0.57
Superoxide radical scavenging activity, IC50 (μg/ml)	141.33 ± 1.70a	145.15 ± 2.92a	453.13 ± 3.76b	153.92 ± 0.76c	212.50 ±3.01d	163.78 ± 1.98e	60.52 ± 2.82
NO radical scavenging activity, IC50 (mg/ml)	0.79 ± 0.01a	1.47 ± 0.06b	1.68 ± 0.02c	1.24 ± 0.03d	2.02 ± 0.06e	1.58 ± 0.02f	101.02 ± 1.18
Ferric reducing capacity	1.82 ± 0.19a	0.34 ± 0.11b	0.62 ± 0.06c	1.27 ± 0.11d	0.23 ± 0.08e	0.77 ± 0.08f	5.70 ± 0.05
(mmole of Fe2+/g of dried extract/fraction)
ABTS radical scavenging activity (mmole Trolox/g of dried extract/fraction)	1.01 ± 0.04a	0.39 ± 0.01b	0.36 ± 0.05b	0.88 ± 0.07c	0.38 ± 0.01d	0.82 ± 0.08c	18.74 ± 0.89

Each value is expressed as a mean ± SD of triplicates from three different experiments. Values with different superscript letters between the same variety, within the same row are significantly different at p < 0.01. SFC, SFE and SFW indicate crude aqueous extract, ethyl acetate fraction and water fraction of SF (var. angustifolia). BFC, BFE and BFW indicate crude aqueous extract, ethyl acetate fraction and water fraction of BF (var. kuntsleri).