ABSTRACT The present study investigated the compositional variation and antioxidant potential of Origanum vulgare L. (subsp. vulgare) collected from three districts of Uttarakhand, India. The essential oil composition was analyzed by GC and GC/MS, and the antioxidant potential was evaluated using 2,2ʹ-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ferric reducing antioxidant power (FRAP) activity and Fe2+-ferrozine test system for iron-chelating activity methods. The analysis allowed the identification of 22–36 compounds representing 87.84–92.95% of the total essential oil. Samples S1 and S2 contained a high amount of sesquiterpene hydrocarbons (26.37–47.25%), while sample S3 was rich in oxygenated monoterpenes (70.21%). The major component was (E)-caryophyllene in S1 and S2 samples (15.40–26.41%) and thymol (60.3%) in S3 sample. The S3 sample collected from the lowest altitude showed the highest oil yield and antioxidant activity.

中文翻译：

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北阿坎德邦 Kumaun Himalayas 不同地区采集的 Origanum vulgare L. 的抗氧化潜力和成分变化

摘要 本研究调查了从印度北阿坎德邦三个地区收集的 Origanum vulgare L. (subsp. vulgare) 的成分变异和抗氧化潜力。通过GC和GC/MS分析精油成分，并使用2,2ʹ-二苯基-1-苦基肼（DPPH）自由基清除活性、铁还原抗氧化能力（FRAP）活性和Fe2+-亚铁嗪测试系统评估抗氧化潜力用于铁螯合活性方法。该分析允许鉴定 22-36 种化合物，占总精油的 87.84-92.95%。样品 S1 和 S2 含有大量的倍半萜烃 (26.37–47.25%)，而样品 S3 富含氧化单萜 (70.21%)。主要成分是 S1 和 S2 样品中的 (E)-石竹烯 (15.40–26.41%) 和 S3 样品中的百里酚 (60.3%)。