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    Chemical composition of essential oil from aerial parts and fruits of Hyssopus officinalis L., Origanum acutidens, Prangos uechritzii, H-hircinum L. and Hypericum polyphyllum subsp polyphyllum
    (Agrimedia Gmbh, 2015) Figueredo, Guilles; Ozcan, Mehmet Musa; Chalchat, Jean Claude; Bagci, Yavuz; Chalard, Pierre; Al Juhaimis, Fahad; Dogu, Suleyman
    The chemical constituents of essential oil by hydrodistillation from the aerial parts of Hyssopus officinalis L., Origanum acutidens and Prangos uechtrizii wild growing in Turkey were extracted by hydrodistillation, and analysed by GC and GC-MS. The major constituents of H. officinalis oil were pinocarvone (29.17%), trans-pine camphone (27.19 %), beta-pinene (17.63%), cis-pinocamphone (4.68%) and myrcene (2.92%). The major constituents of the essential oil of O. acutidens were carvacrol (76.2%), p-cymene (7.4%) and borneol (3.2%). The major components of H. hircinum were alpha-pinene (6.96%), beta-pinene (28.79%), limonene (3.60%), cc-terpineol (7.20%), spathulenol (5.60%), caryophyllene oxyde (2.99%), humulene-1,2-epoxyde (4.20%), alpha-eudesmol (3.96%) and methyle linolenate (7.27%), while ishwarana (64.36%), aristolochene (1.50%), beta-selinene (2.61%), valencene (2.08%), alpha-selinene (1.32%), spathulenol (2.42%), caryophyllene oxyde (2.89%) and beta-eudesmol (4.30%) were recorded as the main constituents of H. polyphyllum.
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    Essential oil composition of some Origanum species
    (Agrimedia Gmbh, 2017) Danton, Ombeline; Ozcan, Mehmet Musa; Figueredo, Gilles; Chalard, Pierre; Dogu, Suleyman; Uslu, Nurhan; Chalchat, Jean Claude
    Chemical compositions of O.majorana, O. onites and O. saccatum oils were determined by GC and GC-MS. The yields of the essential oils were 0.276%, 0.395% and 0.261% v/w, respectively. The most abundant compounds of O.majorana, O. onites and O.saccatum oils were a-terpinene, p-cymene, gamma-terpinene and carvacrol. The highest carvacrol (10.920%) and linalool (10.271%) were found in O. onites oil. in addition, while myrcene is found as 10.471% and 4.817% in O. majorana and O. onites oils, respectively. Myrcene was determined as 0.662% in O.saccatum. The key component of Oregano species tested is p-cymene. The contents of p-cymene in O.majorana, O. onites and O. soccatum oils were determined as 33.416%, 17.417% and 73.143%, respectively. Also, gamma-terpinene contents of oil samples ranged from 17.798% (O. saccatum) to 29.932% (O. majorana).