Table 3.
DPPH radical scavenging activities of the extracts and compounds from P. pinnata leave s and stems
| Test substance | RSa50 (μg/ml) | |
|---|---|---|
| Extracts | Extracta | 116.74 ± 4.20cd |
| Extractb | 99.61 ± 4.69c | |
| Compounds | 1 | 19.27 ± 4.43b |
| 2 | nd | |
| 3 | nd | |
| 4 | 247.30 ± 6.22f | |
| 5 | 4763.60 ± 38.26h | |
| 6 | 865.88 ± 26.84g | |
| 7 | 147.23 ± 5.71e | |
| Reference | Vitamin C | 5.31 ± 1.09a |
Extracta, leaf extract; Extractb, stem extract. Along each column, values with the same letter superscripts are not significantly different. Waller Dunkan (p < 0.05).; nd: not determined (RSa50 > 5000 μg/ml).