Table 2. DPPH and ABTS radicals scavenging capacity of essential oil from C. rotundus rhizomes.
Scavenging capacity |
||
---|---|---|
Regression equation | EC50 (μg/mL) | |
DPPH | y = 0.0024x + 0.3200 R2 = 0.9898 | 75.0 ± 4.1 |
ABTS | y = 0.1758ln(x) − 0.1305 R2 = 0.9977 | 36.1 ± 2.4 |
Values represent means of three independent replicates ± SD. R2 refers to the regression coefficients.