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    Composition of the essential oils of Angelica sylvestris L. var. sylvestris isolated from the fruits by different isolation techniques
    (ALLURED PUBL CORP, 2008) Ozek, Temel; Ozek, Gulmira; Baser, K. Huesnue Can; Duran, Ahmet; Sagiroglu, Mehmet
    The essential oils of the fruits of Angelica sylvestris L.var.sylvestris (Umbelliferae) obtained using hydrodistillation (HD), nucrodistillation (MD) and micro-steam distillation-solid-phase microextraction (MSD-SPME) techniques were analyzed by GC and GUMS. The composition of the oils depended on the isolation method employed. alpha-Pinene (25.6%,36.2% and 9.2%, respectively), beta-phellandrene (9.1%, 9.9% and 3.2%), bornyl acetate (7.3%,4.3% and 6.9%), limonene (5.6%, 4.3% and 2.1%). myrcene (4.4%, 4.0% and 1.3%), camphene (3.9%, 4.7% and 1.2%), alpha-chamigrene (3.4%,4.4% and 9.1%) and beta-sesquiphellandrene (2.5%,3.8% and 8.7%) were found as the main constituents in the oils. p-Cresol (6.5%), epi-alpha-bisabolol (5.6%), (Z)-beta-farnesene (5.5%), naphthalene (4.4%), daucene (3.1%), amorpha-4,11-diene (3.1%) and gamma-muurolene (2.5%) were also among the main constituents of the oil isolated by MSD-SPME.
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    The Identification of Suberosin from Prangos pabularia Essential Oil and Its Mosquito Activity Against Aedes aegypti
    (ACG PUBLICATIONS, 2016) Tabanca, Nurhayat; Tsikolia, Maia; Ozek, Gulmira; Ozek, Temel; Ali, Abbas; Bernier, Ulrich R.; Duran, Ahmet
    A detailed analysis of Prangos pabularia Lindl. (Apiaceae) fruit oil was performed by gas chromatography (GC-FID) and gas chromatography-mass spectrometry (GC-MS). Bicyclogermacrene (21%), (Z)-beta-ocimene (19%), alpha-humulene (8%), alpha-pinene (8%) and spathulenol (6%) were the main constituents of the oil. One compound with 1.8% at RI 3420 remained unidentified or tentatively identified as suberosin from the Wiley GC-MS Library. The assumed compound, suberosin was synthesized in two steps and its structure was confirmed by 1D NMR and GC-MS analyses. As part of our continued research to discover new chemicals for use in mosquito control agents as repellents and larvicides, suberosin and its parent compound coumarin were investigated for the mosquito biting deterrent and larvicidal activity against Aedes aegypti. Both suberosin and coumarin showed biting deterrent activity but the activity was lower than the positive control, DEET (N,N-diethyl-3-methylbenzamide). In larval bioassays, suberosin with LC50 value of 8.1 ppm was significantly more toxic than coumarin (LC50 = 49.6 ppm) at 24-h post treatment. These results indicate that suberosin may be useful for use as mosquito larvicidal agent.