Table 1.
Total phenolic content (TPC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) and nitric oxide (NO) free radical scavenging, and anti-α-glucosidase activities of the extracts. IC50—half maximal inhibitory concentration; GAE—gallic acid equivalent.
| Leaves Extracts/Standard | Total Phenolic Content (mg GAE/g Sample) |
IC50 Value (µg/mL) | ||
|---|---|---|---|---|
| DPPH Free Radical Scavenging Activity | NO Free Radical Scavenging Activity | Anti-α-Glucosidase Activity | ||
| Leucaena leucocephala | 175.75 ± 3.48 d | 8.67 ± 0.29 d | 65.57 ± 4.57 b | 6.62 ± 0.19 c |
| Muntingia calabura | 172.32 ± 3.39 d | 4.67 ± 0.21 c | 59.40 ± 3.39 b | 0.51 ± 0.01 a |
| Spondias dulcis | 50.90 ± 0.69 f | 14.22 ± 0.82 e | 301.66 ± 23.06 f | 45.52 ± 2.18 e |
| Annona squamosa | 199.62 ± 7.40 c | 5.00 ± 0.20 c | 109.02 ± 3.18 c | 3.59 ± 0.18 b |
| Ardisia elliptica | 253.10 ± 1.19 b | 2.17 ± 0.08 a | 49.43 ± 0.18 b | 0.29 ± 0.01 a |
| Cynometra cauliflora | 344.17 ± 10.80 a | 2.88 ± 0.05 ab | 118.62 ± 3.44 cd | 0.90 ± 0.02 a |
| Ficus auriculata | 167.15 ± 2.04 d | 5.06 ± 0.35 c | 169.65 ± 1.53 e | 0.36 ± 0.02 a |
| Averrhoa bilimbi | 97.50 ± 3.46 e | 16.80 ± 0.04 f | 134.33 ± 2.46 d | 26.91 ± 0.58 d |
| Quercetin | - | 3.55 ± 0.28 b | 15.85 ± 0.58 a | 6.62 ± 0.03 c |
| Gallic acid | - | - | 15.41 ± 0.63 a | - |
The results are expressed as means ± standard deviation. Means with different superscript letters are significantly different (p < 0.05) among leaf extracts. “-” indicates that the particular activities were not measured because of irrelevance to the compound.