Table 2. DPPH radical scavenging activities of extracts from each part of Akebia quinata

Samples1)	Scavenging activity (%)					IC50 values (μg/mL)
	62.5 μg/mL	125 μg/mL	250 μg/mL	500 μg/mL	1,000 μg/mL
AFW	54.90±0.143)g4)	68.75±0.17g	77.52±0.15g	83.41±0.14g	84.30±0.06f	56.92±0.19a
ALW	66.86±0.14d	77.38±0.19c	83.74±0.15d	89.88±0.21c	91.54±0.26c	46.74±0.12c
ASW	59.16±0.12f	74.09±0.06e	82.43±0.11e	85.71±0.16e	87.30±0.12e	52.83±0.13b
AFE	63.31±0.17e	71.46±0.31f	81.57±0.17f	85.20±0.30f	88.28±0.26d	43.39±0.16e
ALE	74.15±0.08b	79.06±0.24b	86.41±0.45b	91.73±0.39b	93.36±0.23b	41.67±0.62f
ASE	70.46±0.27c	76.37±0.13d	85.39±0.26c	88.75±0.22d	91.55±0.20c	44.33±0.22d
Ascorbic acid2)	88.58±0.19a	93.04±0.17a	95.33±0.09a	97.65±0.26a	99.61±0.08a	35.29±0.10g

AFW, extracts from Akebia quinata fruit by hot-water; ALW, extracts from Akebia quinata leaf by hot-water; ASW, extracts from Akebia quinata stem by hot-water; AFE, extracts from Akebia quinata fruit by 70% ethanol; ALE, extracts from Akebia quinata leaf by 70% ethanol; ASE, extracts from Akebia quinata stem by 70% ethanol.
Ascorbic acid was used as a positive control substance.
All values are mean±SD (n=5).
Means with different superscript letters (^a-g) in the same column are significantly different at p<0.05 by Duncan’s multiple range test (a>b>c>d>e>f>g).