Table 3. ABTS+ radical scavenging activities of fraction extracts P. persica twigs and its solvent-soluble portions

Samples	Scavenging activity (%)					IC50 values (μg/mL)
	500 μg/mL	250 μg/mL	125 μg/mL	62.5 μg/mL	31.3 μg/mL
Hot water	99.0±0.212)b3)	92.8±0.18d	76.8±0.17d	55.9±0.16d	37.7±0.13d	49.2±2.2c
n-Hexane layer	50.4±0.16d	34.6±0.23f	23.3±0.26f	17.2±0.13f	-4)	478.1±29.0a
EtOAc layer	99.9±0.13a	99.7±0.13a	98.2±0.13a	90.0±0.12a	72.2±0.12b	16.5±0.7e
n-BuOH layer	99.9±0.15a	96.8±0.14b	94.6±0.15b	66.6±0.16c	45.6±0.14c	34.6±3.0d
H2O layer	77.0±0.23c	59.2±0.12e	36.4±0.16e	20.6±0.17e	-	188.9±10.4b
(+)-Catechin1)	99.9±0.16a	95.0±0.14c	92.8±0.14c	88.4±0.16b	76.1±0.12a	9.5±1.9f

(+)-Catechin was used as a positive control substance.
Mean±SD (n=3).
^a-fValues with different superscript letters in the column are significantly different (p<0.05).
-, not tested.