[
    {
        "id": "osp-13557",
        "type": "article-journal",
        "title": "Comparison of Chemical Composition and Antioxidant Activity of Four Essential Oils Extracted from Different Parts of Juniperus excelsa",
        "author": [
            {
                "family": "Al‐Busafi",
                "given": "Saleh N."
            },
            {
                "family": "Al‐Saidi",
                "given": "Salim"
            },
            {
                "family": "Al-Riyami",
                "given": "Amani I."
            },
            {
                "family": "Al-Manthary",
                "given": "Nawal S."
            }
        ],
        "URL": "https://omanscience.com/en/articles/comparison-of-chemical-composition-and-antioxidant-activity-of-four-essential-oils-extracted-from-different-parts-of-juniperus-excelsa",
        "language": "en",
        "issued": {
            "date-parts": [
                [
                    2016
                ]
            ]
        },
        "container-title": "Sultan Qaboos University Journal for Science",
        "volume": "21",
        "issue": "1",
        "page": "7",
        "DOI": "10.24200/squjs.vol21iss1pp7-15",
        "publisher": "Sultan Qaboos University",
        "ISSN": "2308-3921",
        "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."
    }
]