. 2021 Apr 21;26(9):2417. doi: 10.3390/molecules26092417

Table 2.

The antioxidant activity of DPPH, ABTS, FRAP, and CUPRAC of seven plant materials of the Polygonaceae family and grape seed.

Category	DPPH Scavenging (%)	ABTS Scavenging (%)	FRAP/mg Vc/g Equivalent	CUPRAC/mg Trolox/g Equivalent
Control	67.68 ± 0.25 ^b	92.57 ± 0.74 ^a	115.95 ± 0.85 ^a	208.89 ± 2.24 ^b
A	72.11 ± 0.42 ^a	93.20 ± 0.29 ^a	103.12 ± 1.50 ^b	215.23 ± 0.59 ^a
B	22.48 ± 0.19 ^g	28.75 ± 1.36 ^h	25.46 ± 0.38 ^g	48.45 ± 1.32 ^g
C	32.28 ± 0.33 ^f	39.25 ± 0.28 ^f	68.84 ± 0.86 ^e	156.20 ± 3.25 ^c
D	9.12 ± 0.48 ^k	22.48 ± 0.30 ⁱ	6.58 ± 0.32 ^k	14.23 ± 0.85 ^m
E	6.75 ± 0.50 ^m	11.34 ± 0.25 ^k	11.13 ± 0.45 ⁱ	26.04 ± 1.20 ⁱ
F	8.49 ± 0.24 ^l	20.28 ± 0.19 ^j	16.92 ± 0.32 ^h	37.67 ± 0.47 ^h
G	44.62 ± 0.36 ^d	58.69 ± 0.40 ^c	71.42 ± 0.29 ^d	128.29 ± 2.19 ^e
H	18.23 ± 0.19 ^h	41.08 ± 0.28 ^e	9.79 ± 0.08 ^j	22.14 ± 0.56 ^l
I	36.50 ± 0.42 ^e	58.17 ± 0.13 ^d	76.60 ± 0.94 ^c	131.25 ± 0.47 ^d
J	14.25 ± 0.28 ⁱ	31.20 ± 0.96 ^g	11.49 ± 0.40 ⁱ	24.30 ± 0.32 ^j
K	45.40 ± 0.63 ^c	67.25 ± 1.27 ^b	53.49 ± 0.34 ^f	118.21 ± 0.18 ^f
L	12.14 ± 0.19 ^j	20.38 ± 0.50 ^j	10.16 ± 0.69 ^j	23.28 ± 0.79 ^k

Different lowercase letters in each column indicate significant differences at the p < 0.05 level.