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. 2017 Mar 24;7:45231. doi: 10.1038/srep45231

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.