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Table 3 DPPH radical scavenging activity and AAI of A. cepa, A. sativum, D. gossweileri, P. brazzeana essential oils and ascorbic acid

From: Chemical composition, in vitro antioxidant and anti-inflammatory properties of essential oils of four dietary and medicinal plants from Cameroon

  Regression curve’s equations Coefficient of determination : R2 SC50(μg/ml) AAI
A. cepa y = 192.3 × + 11.96 0.927 0.20 12.626
A. sativum y = 191.6 × + 12.73 0.919 0.19 12.886
D. gossweileri y = 194.0 × + 11.10 0.931 0.20 12.821
P. brazzeana y = 190.2 × + 14.15 0.904 0.19 13.298
Ascorbic acid y = 19.12 × + 12.19 0.934 1.98 1.262
  1. Linear regression analysis was used to calculate SC50 value
  2. SC 50 Scavenging concentration (μg/mL) at 50 %, AAI antioxidant activity index