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. 2023 Jan 21;12(2):246. doi: 10.3390/antiox12020246

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Free radical scavenging activity levels of different essential oil concentrations. EOP: Essential oil obtained by cold-pressed method; EOPD: essential oil obtained by cold-pressed method followed by steam distillation. Concentrations assayed for ABTS in EOP at 1.5 (□), 8 (■), and 12 (■) µL/mL and EOPD at 12 (□), 15 (■), and 30 (■) µL/mL. Concentrations assayed for nitric oxide in EOP at 15 (□), 30 (■), and 60 (■) µL/mL and EOPD at 30 (□), 60 (■), and 150 (■) µL/mL. Data are presented as means ± SEMs (n = 3); * represents significant differences between the oils, according to Tukey’s test (p < 0.05).