Future Journal of Pharmaceutical Sciences

Table 7 DPPH radical scavenging activity of Smilax china bark extract from 4 solvents (Unit: %)

From: Neuroprotective action of Smilax china ethanolic bark extract in treatment of a prominent aging disorder: Parkinson’s disease induced by rotenone

µg/mL	Water	Acetone	Ethanol	Methanol	L-Ascorbic acid
50	1.80 ± 0.10^dw	33.38 ± 0.60^cw	54.02 ± 0.84^aw	40.50 ± 0.77^bw	–
100	6.08 ± 0.15^dx	50.80 ± 0.30^bx	72.73 ± 0.02^ax	52.52 ± 1.78^cx	–
500	29.40 ± 0.20^cy	83.84 ± 0.45^by	86.73 ± 0.79^ay	77.04 ± 0.18^by	–
1000	47.24 ± 0.27^dz	94.76 ± 0.14^cz	89.40 ± 0.11^az	90.86 ± 0.50^az	–
IC₅₀	1,007.62 ± 5.29^d	82.76 ± 0.38^b	48.93 ± 1.89^a	98.40 ± 8.10^c	29.56 ± 0.22

1. All measurements were taken in triplicate, and the average of three replications was used to calculate the values. Different values within a different row (a–d) and a column (w–z) are significantly different (p < 0.05), n = 3
2. IC₅₀ (mg/mL) is the concentration for scavenging 50% of DPPH radicals

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