South Asian Journal of Experimental Biology, Vol 7, No 2 (2017)

Jul 11
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Chemical composition, antibacterial and antioxidant activities of Juniperus oxycedrus essential oils from North Western Algeria

Cherifa Zahaf, Djilali Achour, Meriem Mokhtar, Moussa Brada


The aim of the current study was to identify the essential oils of Juniperus oxycedrus from North Western Algeria (Mostaganem) by gas chromatography coupled to mass spectrometer (GC-MS), and to evaluate their antibac-terial and antioxidant activities. Extraction was carried out by two processes, hydrodistillation (HD) and steam distillation (SD). Analysis by GC-MS led to the identification of 38 components using both methods. HD was found to be the best process for the extraction of Juniperus essential oil, and the ma-jor identified compounds were: germacrene-D (38.28%), followed by α.-pinene (17.66%), and δ-cadinene (5.91%). In the antibacterial test, SD oil had a higher inhibitory effect. The strain Staphylococcus aureus was the most sensitive with an inhibition zone of 15.25 mm and a minimum inhibitory concentration (MIC) of 0.25 mg/mL. The antioxidant activity of J. oxycedrus es-sential oils obtained by HD was more important than SD (IC50= 19.52 mg/mL and IC50= 38.62 mg/mL) with DPPH and β-carotene bleaching tests respec-tively. Essential oils of J. oxycedrus could therefore represent good candidates to be used as antioxidant and antibacterial agents.

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