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. 2014 Winter;13(1):127–133.

Table 2.

Free radical scavenging activity and antioxidant potency of ajowan essential oil and its active constituent

Sample	IC _{50 (ABTS•+)} (µg/mL)*	IC _{50 (β-carotene bleaching)} (µg/mL)*
Ajowan essential oil	74.78 (64.58 – 86.60)^c	221.90 (185.30 – 265.80)^a
Thymol	33.57 (29.53 – 38.17)^b	154.90 (87.04 – 275.60)^a
Gallic acid	8.90 (7.55 – 10.50)^b	222.80 (168.60 – 294.60)^a
Vitamin C	31.38 (28.24 – 34.87)^a	-

⁽ ^a-c ⁾ Different superscript letters within each column denote significant differences (Tukey’s test, p < 0.001).

* IC₅₀ values have been presented with their respective 95% confidence limits.