Abstract
The chemical contents and compositions of four essential oils extracted from leaves, branches, fruits and gum-resin of Juniperus excelsa from Jabal Al-Akhdhar in the Sultanate of Oman were studied using infra-red (IR) spectroscopy and gas chromatography-mass spectrometry (GC-MS). IR analysis revealed the presence of C-H, O-H, C=C and C=O functionality bonds with varied intensities. The GC-MS study showed the occurrence of 35 different monoterpenes of which 11 (31.43%) monoterpenes were shared by the four oils. α-Pinene was detected in branches and gum-resin oils as a major compound with different proportions (80.50% in gum oil and 79.03% in branches oil). The major component in leaf and fruit oils was the monoterpene limonene with proportions of 50.46% and 42.51%, respectively. Sesquiterpenes exist in leaf, branch and fruit essential oils but not in gum-resin oil. The essential oil of the leaves showed stronger antioxidant and radical scavenging activities than the other oils.
Keywords
Publication details
- DOI
- 10.24200/squjs.vol21iss1pp7-15
- Journal
- Sultan Qaboos University Journal for Science, 21(1), 7
- Publisher
- Sultan Qaboos University
- Open access
- Gold open access
- License
- CC BY 4.0
Cite this article
APA 7
Al‐Busafi, S. N., Al‐Saidi, S., Al-Riyami, A. I., & Al-Manthary, N. S. (2016). Comparison of Chemical Composition and Antioxidant Activity of Four Essential Oils Extracted from Different Parts of Juniperus excelsa. Sultan Qaboos University Journal for Science, 21(1), 7. https://doi.org/10.24200/squjs.vol21iss1pp7-15
MLA 9
Al‐Busafi, Saleh N., et al. "Comparison of Chemical Composition and Antioxidant Activity of Four Essential Oils Extracted from Different Parts of Juniperus excelsa." Sultan Qaboos University Journal for Science, vol. 21, no. 1, 2016, pp. 7. https://doi.org/10.24200/squjs.vol21iss1pp7-15.
Chicago (author–date)
Al‐Busafi, Saleh N., Salim Al‐Saidi, Amani I. Al-Riyami, and Nawal S. Al-Manthary. 2016. "Comparison of Chemical Composition and Antioxidant Activity of Four Essential Oils Extracted from Different Parts of Juniperus excelsa." Sultan Qaboos University Journal for Science 21 (1): 7. https://doi.org/10.24200/squjs.vol21iss1pp7-15.
Harvard
Al‐Busafi, S. N., Al‐Saidi, S., Al-Riyami, A. I. and Al-Manthary, N. S. (2016) 'Comparison of Chemical Composition and Antioxidant Activity of Four Essential Oils Extracted from Different Parts of Juniperus excelsa', Sultan Qaboos University Journal for Science, 21(1), pp. 7. doi:10.24200/squjs.vol21iss1pp7-15.
Vancouver
Al‐Busafi SN, Al‐Saidi S, Al-Riyami AI, Al-Manthary NS. Comparison of Chemical Composition and Antioxidant Activity of Four Essential Oils Extracted from Different Parts of Juniperus excelsa. Sultan Qaboos University Journal for Science. 2016;21(1):7. doi:10.24200/squjs.vol21iss1pp7-15
IEEE
S. N. Al‐Busafi, S. Al‐Saidi, A. I. Al-Riyami, and N. S. Al-Manthary, "Comparison of Chemical Composition and Antioxidant Activity of Four Essential Oils Extracted from Different Parts of Juniperus excelsa," Sultan Qaboos University Journal for Science, vol. 21, no. 1, pp. 7, 2016, doi: 10.24200/squjs.vol21iss1pp7-15.