Table 2.
Superoxide anion scavenging activity of the methanolic extract of Garcinia kola and ascorbic acid.
| Sample | Concentration (µg/mL) | % Inhibition (n = 6) | IC50 (µg/mL) | Regression equation |
|---|---|---|---|---|
| Garcinia kola | 3.30 | 26.50 ± 0.16 | 10.0 | y = 3.30x + 17.1 (r 2 = 0.960) |
| 6.70 | 42.70 ± 0.12 | |||
| 10.00 | 50.50 ± 0.10 | |||
| 13.30 | 55.70 ± 0.02 | |||
| 16.70 | 75.10 ± 0.07 | |||
|
| ||||
| Ascorbic acid | 0.67 | 09.5 ± 0.12 | 2.3 | y = 24.4x − 4.44 (r 2 = 0.954) |
| 1.33 | 24.8 ± 0.36 | |||
| 2.00 | 52.5 ± 0.22 | |||
| 2.67 | 63.9 ± 0.03 | |||
| 3.30 | 70.3 ± 0.01 | |||
Results are expressed as means ± SD of five parallel measurements.