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Öğe Antimicrobial and antioxidant activities of the essential oil of Chaerophyllum libanoticum Boiss. et Kotschy(ELSEVIER SCI LTD, 2007) Demirci, B.; Kosar, M.; Demirci, F.; Dinc, M.; Baser, K. H. C.Chaerophyllum libanolicum Boiss. et Kotschy from Apiaceae, is collected and used as a food plant in Turkey. The essential oil obtained by hydrodistillation from the crushed fruits of C lihanoticuin collected from Osmaniye, Southern Turkey, was simultaneously analysed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). As a result, a total of seventy three components were characterized, representing 98.3% of the total oil with monoterpenes as the major group. The principal constituents were identified as beta-phellandrene (17.6%), limonene (15.9%), beta-pinene (8.8%), and sabinene (8.5%), respectively. The essential oil was evaluated for its antimicrobial activity using a microdilution assay resulting in the inhibition of a number of common human pathogenic bacteria including methicillinresistant Staphylococcus aureus (MRSA) and the yeast Candida albicans. The minimum inhibitory concentrations (MIQ varied between 0.25 and 0.5 mg/mI which is within a moderate antimicrobial activity range. Furthermore, the antioxidant capacity of the essential oil was examined using an in vitro radical scavenging activity test. The C libanoticum essential oil scavenged 1,1-diphenyl-2-picrylhydrazyl radical (DPPH,), resulting in IC50 > 30 mg/ml. In addition, the effect on inhibition of lipid peroxidation of the essential oil was assayed using P-carotene bleaching and haemoglobin induced linoleic acid peroxidation methods resulting in 16% antioxidative activity. (c) 2007 Elsevier Ltd. All rights reserved.Öğe Comparison of Essential Oil of Xanthogalum Purpurascens Lallem. Obtained via Different Isolation Techniques(Allured Publ Corp, 2006) Özek, Gülmira; Özek, Temel; Baser, K. H. C.; Duran, Ahmet; Sağıroğlu, MehmetThe essential oil of Xanthogalum purpurascens Lallem. was obtained by hydrodistillation (HD), microdistillation (MD) and micro-steam distilled solid-phase micro extraction (MSD-SPME) techniques. The oils were then analyzed by GC and GUMS. The composition of oils depended on the extraction method employed. The main components of the hydrodistilled oil were found to be alpha-phellandrene (32%), beta-phellandrene (23%), isopropyl hexanoate (6%), limonene (5.3%), p-cymene (3.7%), alpha-pinene (3.2%) and bicyclogermacrene (3%).Öğe Comparison of hydrodistillation and microdistillation methods for the analysis of fruit volatiles of Prangos pabularia Lindl., and evaluation of its antimicrobial activity(ELSEVIER, 2007) Oezek, G.; Oezek, T.; Iscan, G.; Baser, K. H. C.; Hamzaoglu, E.; Duran, A.The volatile constituents of Prangos pabularia Lindl. fruits (Umbelliferae) were obtained by hydrodistillation (HD) and microdistillation (MD) techniques, and then analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS) methods. One hundred and twenty-eight compounds have been characterized representing 90.5% of hydrodistilled oil (HDO). In the microdistilled oil (MDO), 115 compounds constituting 93.0% of the oil were detected. alpha-Humulene (16.6% and 15.5%), bicyclogermacrene (16.1% and 7.9%), spathulenol (10.6% and 5.7%), germacrene D (5.7% and 2.9%) and alpha-pinene (4.2% and 23.9%) were found to be the major constituents of HDO and MDO, respectively. Antimicrobial activity of the oil was tested via microdilution broth technique. Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris, Salmonella typhimurium, Staphylococcus epidermidis, Methicillin-resistant Staphylococcus aureus, and Candida albicans were used as the test microorganisms. (c) 2007 SAAB. Published by Elsevier B.V. All rights reserved.Öğe Composition of essential oils from Salvia anatolica, a new species endemic from Turkey(SPRINGER, 2007) Ozek, G.; Ozek, T.; Baser, K. H. C.; Hamzaoglu, E.; Duran, A.The component composition of essential oils produced by steam distillation from flower heads, leaves, and stems of Salvia anatolica (Lamiaceae), a recently described new species endemic from Turkey, was studied by GC/FID and GC/MS. A total of 127 volatile components representing 96% of the oil was identified in essential oil from flower heads and leaves. It was found that the principal oil components of flower heads and leaves were alpha-pinene (10.9%), beta-pinene (6.7%), alpha-copaene (6.3%), heptacosane (6.2%), and hexadecanoic acid (5.0%). A total of 109 volatile compounds representing 87.9% of the oil was characterized in essential oil isolated from stems. The principal oil components of stems were identified as hexadecanoic acid (27.2%), tetradecanoic acid (15.2%), dodecanoic acid (5.5%), and alpha-copaene (5.0%).Öğe Composition of the Essential Oil of Nepeta racemosa Lam(1993) Baser, K. H. C.; Özek, T.; Akgül, A.; Tümen, G.Water-distilled essential oils of Nepeta racemosa collected from two different localities in Turkey were analyzed by capillary GC and GUMS. The major constituents of the oils were found to be 4aa,7a,7ap-nepetalactone (31.51-91.46%) and 1,8-cineole (2.04-10.44%).Öğe Essential Oil Composition of Sea Fennel (Crithmum Maritimum) From Turkey(Wiley-V C H Verlag Gmbh, 2001) Özcan, M.; Akgül, A.; Baser, K. H. C.; Özak, T.; Tabanca, N.Constituents of essential oils of sea fennel (Crithmum maritimum L.) collected in different localities of Turkey in 1997 and 1998 have been identified by GC/MS. The effects of collection time and locality on the oil content and composition have been studied. The samples were classified into groups according to the main components: sabinene, gamma -terpiene, methyl thymol and terpinen-4-ol; gamma -terpinene, dill apiol and sabinene; gamma -terpiene, methyl thymol and limonene; p-cymene, methyl thymol and gamma -terpinene. (Z)-beta -ocimene and spathulenol were found with high percentage values in some samples. cis-p-Menth-4-en-1,2-diol was identified in only one oil. Early collected plants yielded oil rich in p-cymene. Effect of freezing plant did not have any important effect in oil composition.Öğe Essential oil composition of Tordylium syriacum L. (Umbelliferae) collected from different localities in Turkey(TAYLOR & FRANCIS INC, 2012) Kurkcuoglu, M.; Baser, K. H. C.; Tosun, A.; Duman, H.; Duran, A.Essential oils of Tordylium syriacum collected from different localities of Turkey were analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). The fruits of T. syriacum were submitted for hydrodistillation and the essential oils were obtained in 0.1-0.7% yield. The compounds characterized represented 91.7-94.7% of the oils. The main constituent was found to be octyl hexanoate (46.2-80.5%).Öğe Research into chemistry and biological activities of Prangos Lindl. (Apiaceae) species of Turkey(GEORG THIEME VERLAG KG, 2009) Baser, K. H. C.; Demirci, B.; Ozek, G.; Duran, A.; Tabanca, N.; Wedge, D. E.[Abstract not Available]
