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Abstract
We report a comparative study of Juniperus virginiana and Juniperus communis essential oils (obtained by hydrodistillation of plant parts from the west of Romania or obtained commercially in Europe) by thin layer chromatographic and gas chromatographic-mass spectrometric analysis. Concentrations of cineole and guaiazulene, key compounds with insect repellent and anti-inflammatory activity, were evaluated. Monoterpenes were more abundant in essential oils from berries (40.2% in J. virginiana essential oil and 34.4% in J. communis essential oil), followed by sesquiterpene alcohols, but the latter were more abundant in essential oils from leaves (26.9% in J. virginiana and 16.9% in J. communis). We also discovered substantial amounts of monoterpene alcohols (8.9–9.5% and 6.4–11.6% for J. virginiana and J. communis, respectively) and sesquiterpenes (more abundant in J. communis essential oils: 21.1% in berries and 12.4% in leaves; in J. virginiana essential oils amounts of sesquiterpenes were only 5.9–6.8%). ...
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