Table 2.
The antioxidant activities of the P. frutescens leaf extract and its fractions.
| Samples | DPPH Scavenging Activity (μg of Trolox/mg DE) | ABTS+ Scavenging Activity (μg of Trolox/mg DE) | FRAP (μg of FeSO4/mg DE) | Superoxide Anion Scavenging Activity (μg of Trolox/mg DE) |
|---|---|---|---|---|
| CE | 93.82 ± 1.92 c | 184.77 ± 4.71 e | 873.79 ± 30.47 d | 440.92 ± 33.51 e |
| PE | 57.32 ± 5.59 d | 194.92 ± 1.37 e | 150.24 ± 14.59 d | 235.14 ± 72.32 f |
| CF | 562.16 ± 23.54 b | 581.70 ± 10.93 d | 1216.90 ± 71.32 c | 977.74 ± 66.28 c |
| EtOAc | 1006.33 ± 15.80 a | 1682.80 ± 38.49 a | 4181.13 ± 324.28 a | 1957.73 ± 101.86 a |
| n-BuOH | 94.82 ± 15.80 c | 134.46 ± 27.72 e | 1256.56 ± 122.21 c | 1114.23 ± 28.19 c |
| AQ | 84.43 ± 1.12 c,d | 118.37 ± 2.64 e | 353.59 ± 36.83 d | 675.53 ± 48.04 d |
| Vc | 588.68 ± 10.54 b | 1479.39 ± 59.27 b | 1741.74 ± 23.20 b | 1513.92 ± 21.72 b |
| BHT | 87.25 ± 5.84 c,d | 922.84 ± 23.12 c | 784.15 ± 7.73 d | 247.19 ± 10.72 f |
CE = crude extract; PE = petroleum ether fraction; CF = chloroform fraction; EtOAc = ethyl acetate fraction; n-BuOH = n-butanol fraction; AQ = aqueous phase residue. The different letters represent a significant difference, p < 0.05.