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Table 2 Antioxidant activity of essential oils using the corresponding concentrations measured by DPPH and β-carotene-linoleic acid methodsa

From: Effective antioxidant, antimicrobial and anticancer activities of essential oils of horticultural aromatic crops in northern Egypt

Essential oil

IC50 (mg/L)

DPPH radical scavenging

β-Carotene-linoleic acid

Artemisia judaica

4.7 ± 0.1b

2.7 ± 0.1b

Artemisia monosperma

5.3 ± 0.3cb

3.3 ± 0.1cd

Callistemon viminalis

5.2 ± 0.1c

3.2 ± 0.1c

Citrus aurantifolia

7.2 ± 0.3e

5.6 ± 0.3f

Citrus limon

6.1 ± 0.3d

4.2 ± 0.1e

Cupressus macrocarpa

6.1 ± 0.1d

4.2 ± 0.3e

Origanum vulgare

2.8 ± 0.3a

1.1 ± 0.1a

Pelargonium graveolens

6.2 ± 0.1d

4.1 ± 0.3e

Rosmarinus officinalis

6.0 ± 0.1d

4.2 ± 0.2e

Schinus molle

8.9 ± 0.1f

6.6 ± 0.3 g

Thuja occidentalis

5.6 ± 0.3 cd

3.6 ± 0.4d

Butylated hydroxytoluene (BHT)

2.9 ± 0.1a

2.6 ± 0.2b

  1. aValues are expressed as means ± SD
  2. bMeans followed by different letters within a column indicate significant differences between treatments based on LSD test (P ≤ 0.05)