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    Chemical compositions and antibacterial activities of the essential oils from aerial parts and corollas of origanum acutidens (Hand.-Mazz.) Ietswaart, an endemic species to Turkey
    (Mdpi, 2009) Coşge, Belgin; Türker, Arzu Uçar; İpek, Arif; Gürbüz, Bilal; Arslan, Neşet
    Essential oils extracted by hydrodistillation from the aerial parts and corollas of Origanum acutidens (Hand.-Mazz.) Ietswaart, an endemic Turkish flora species, were analyzed by GC-MS. The amounts of essential oil obtained from the aerial parts and the corollas were 0.73% and 0.93%, respectively. Twenty-five components in both the aerial parts oil and the corolla oil, representing 95.11% and 93.88%, respectively, were identified. The aerial parts and corolla oils were characterized by the predominance of two components: p-cymene (9.43% and 17.51%) and carvacrol (67.51% and 52.33%), respectively. The essential oils were also evaluated for their antimicrobial activity against ten bacteria by the disc diffusion assay. Our findings showed the following order in the sensitivity to the essential oils, as indicated by the corresponding inhibition zones: Proteus vulgaris > Salmonella typhimurium > Enterobacter cloacae > Klebsiella pneumonia > Escherichia coli > Serratia marcescens > Pseudomonas aeruginosa for the aerial parts essential oil, and Salmonella typhimurium > Proteus vulgaris > Enterobacter cloacae > Escherichia coli > Klebsiella pneumoniae > Serratia marcescens > Pseudomonas aeruginosa for the corolla essential oil. The studied essential oils thus exhibited a broad-spectrum of activity against both Gram-positive and Gram-negative bacteria, whereas the tested Gram-positive bacteria were more susceptible to the essential oil samples.
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    Comparison of antiradical activities and compositions of essential oils of two Origanum spp. from Turkey
    (2011) Coşge, Belgin; Kıralan, Mustafa; İpek, Arif; Bayrak, Ali; Gürbüz, Bülent
    Hydro-distilled essential oils from the aerial parts of Origanum vulgare L. subsp. hirtum (Link) Letsw. (OVH) and Origanum onites L. (OO) were analyzed by GC/MS. Twelve compounds comprising 98.89% of the (OVH) essential oil were characterized, and the main components were thymol (58.35%) and ?-terpinene (23.22%). Twenty compounds representing 94.58% of the (OO) essential oil were identified, among which carvacrol (73.90%) and ?-terpinene (5.96%) were the major ones. Antiradical activities of essential oils investigated were tested using the DPPH radical-scavenging method. DPPH radical scavenging activities of two Origanum species essential oils were very high, and this was obviously related to their chemical compositions which were markedly rich in phenolic components such as thymol and carvacrol.
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    Comparison of essential oil components of wild and field grown Salvia cryptantha Montbert & Aucher ex Benthan, in Turkey
    (Tubitak Scientific & Technical Research Council Turkey, 2012) İpek, Arif; Gürbüz, Bilal; Bingöl, Mesrur Ümid; Geven, Fatmagül; Akgül, Gencay; Rezaeieh, Kiarash Afshar Pour; Coşge, Belgin
    Essential oils extracted by hydrodistillation from the aerial parts of naturally growing and field grown plants of Salvia cryptantha Montbert & Aucher ex Benthan were analyzed by GC-MS. Furthermore, the chemical components of naturally growing and cultured plants in 2 consecutive years (2007-2008) were compared. The essential oils of plant materials investigated ranged from 1.20% up to 1.52%. Nine for naturally growing and 22 components for both 2007-08 field grown crops were characterized, representing 94.75%, 95.82%, and 93.35%, respectively. Valencene (31.80%), eucalyptol (23.61%), and beta-pinene (15.63%) were recognized as major components.
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    Gas chromatography/mass spectrometry analysis of essential oil from different vegetative organs and fruits of foeniculum vulgare Mill. var. vulgare growing in Turkey
    (Asian Journal Of Chemistry, 2009) Coşge, Belgin; İpek, Arif; Gürbüz, Bilal
    The essential oils obtained by hydrodistillation of fruit, stem, leaf stalk and leaf of bitter fennel (Foeniculum vulgare Miller, Apiaceae) were analyzed by GC-MS. Essential oil content was obtained 7.25% in fruit, 0.375% in stem, 0.857% in leaf stalk and 0.75% in leaf. trans-Anethole was the major component in the fruit (75.05%) stem (64.09%) and leaf stalk (75.64%) and the leaf oil which contained alpha-phellandrene (38.23%) and alpha-pinene (31.79%) as the main components. The chemical composition of the essential oils investigated was found both quantitatively and qualitatively different.
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    GC/MS analysis of herbage essential oil from lemon balms (Melissa officinalis L.) grown in Turkey
    (2009) Coşge, Belgin; İpek, Arif; Gürbüz, Bilal
    This study was carried out to investigate the content and chemical composition of essential oil from lemon balm (Melissa officinalis L., Labiatae) grown in Turkey. The water-distilled essential oil from aerial parts of plants was analyzed by GC/MS. The essential oils of plant materials investigated ranged from 0.04 to 0.10%. Citronellal (36.62 to 43.78%), citral (10.10 to 17.43%), thymol (0.40 to 11.94%), and ?-caryophyllene (5.91 to 7.27%) were recorded as major components.
  • Küçük Resim
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    Identification of essential oil components of salvia cryptantha montbret & aucher ex bentham, growing wild in Turkey
    (Asian Journal Of Chemistry, 2009) Bingöl, Ü.; Coşge, Belgin; İpek, Arif; Gürbüz, Bilal; Geven, F. G.
    The essential oils obtained by hydrodistillation of the aerial parts (leaves and stems) and flowers of Salvia cryptantha Montbret & Aucher ex Bentham (Labiatae), an endemic species of Turkey, were analyzed by GC-MS. The contents of essential oil were obtained 1.44 % in aerial part and 0.4 % in flower. Thirteen components in aerial parts oil and 10 components in flower oil were identified, representing 97.89 and 97.33 %, respectively. 1,8-Cineole (30.38 and 36.28 %), valencene (24.34 and 26.53 %) and camphor (12.29 and 14.72 %) were found as the major components of both aerial parts and flower oils, respectively.
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    Some phenotypic selection criteria to improve seed yield and essential oil percentage of sweet fennel (Foeniculum vulgare Mill. var. dulce)
    (2009) Coşge, Belgin; İpek, Arif; Gürbüz, Bilal
    The research was aimed to determine relationships between seed yield and some yield components of 20 sweet fennel (Foeniculum vulgare Mill. var dulce) lines. The highest positive correlation (r=0.915) was recorded between biological yield and single plant yield. Plant height, number of branches, number of umbels and umbellets had a positive effect on single plant yield. One thousand seed weight was negatively correlated with essential oil percentage. The highest positive and direct effect on seed yield was shown by number of umbellets, while maximum negative and direct contribution to it was made by biological yield. In addition, single plant yield, plant height and one thousand seed weight affected seed yield positively. Single plant yield had maximum direct effect (32.95%) on essential oil percentage followed by plant height (24.60%) and number of branches (15.11%). In conclusion, it could be suggested that single plant yield, number of umbellets and plant height are good phenotypic selection criteria to improve seed yield and essential oil percentage of sweet fennel.