Browsing by Author "Özgökçe, F."

Now showing 1 - 10 of 10

Antimicrobial Activities of Two Scorzonera Species Growing in Turkey
(Chemical Publishing Co., 2009) Sari, A.; Özbek, B.; Özgökçe, F.
The antimicrobial activities of the ethanolic extracts and petroleum ether, ethyl acetate and n-butanol tractions obtained from the subaerial parts of two Scorzonera species (5. latifolia and 5. veratrifolia) (Asteraceae) have been tested against Staphylococcus aureus ATCC 6538, Staphylococcus epidermidis ATCC 12228, Escherichia coli ATCC 8739, Klebsiella pneumoniae ATCC 4352, Proteus mirabilis ATCC 14153, Pseudomonas aeruginosa ATCC 1539, Salmonella typhi, Shigella flexneri and Candida albicans ATCC 10231 using microbroth dilution technique. The ethyl acetate fractions of both S. latifolia and S. veratrifolia showed the highest antimicrobial activity against Staphylococcus aureus (MIC values 19.52 and 39.06 μg/mL, respectively).
The Distribution and Habitat of Calomera Littoralis Mandli (Mandl, 1967) (Coleoptera: Cicindelidae) on the Coastal Margin of Lake Van in Turkey
(2006) Özgökçe, M.S.; Atlihan, R.; Kasap, İ.; Özgökçe, F.; Yıldız, Ş.; Demir, M.; Polat, E.
The tiger beetle Calomera littoralis mandli was found at Lake Van in eastern Anatolia at 20 out of 47 localities surveyed during 2004–2005. It occurs in open habitats with fine sand mixed with clay or in salt-marshes and with little plant cover. Three groups of larval burrows were determined, with average openings of 1.54 mm, 2.46 mm and 3.80 mm. These correspond to the 1st, 2nd and 3rd larval instars. © 2006 Taylor & Francis Group, LLC.
Evaluation of Median Lethal Dose and Analgesic Activity of Foeniculum Vulgare Miller Essential Oil
(2006) Özbek, H.; Taş, A.; Özgökçe, F.; Selçuk, N.; Alp, Ş.; Karagöz, S.
Gas-chromatographic analysis, analgesic effect and median lethal dose (LD50) of Foeniculum vulgare Essential Oil (FEO) extract were investigated in mice. In all the experiments mice were tested twice, 30 min before drug administration in the baseline latency determinated and 30, 90 and 150 min after drug administration by tail-flick device. Aspirin (150 mg kg-1, peroral) and Morphine hydroclorure (10 mg kg-1 subcutan) were used as reference drugs. Only isotonic saline solution (0.2 mL, intraperitoneal) was given to the control group. 0.25 and 0.50 mL kg-1 FEO extract were given intra peritoneally to FEO groups. LD50 of the FEO was determined as 1.038 mL kg-1. At the 150th min of the study it is determined that all of the study groups (except Morphine group) had significantly analgesic effect when compared with control group and there was no difference between Aspirin and FEO groups. It was concluded that FEO had statistically significant and same analgesic effect with Aspirin showed at the 150th min of the study. © 2006 Asian Network for Scientific Information.
Identification of Chemical Composition and Antibacterial Properties Juniperus Oxycedrus L. Subsp. Oxycedrus Leaf Essential Oil
(Centenary University, 2018) Okut, N.; Yildirim, B.; Ekici, K.; Terzioğlu, Ö.; Özgökçe, F.
The constituents of leaf essential oil of Juniperus oxycedrus L. subsp. oxycedrus (JOO) from wild flora of Gevas-Van in Turkey (Mount Artos) were studied using Gas Chromatography-Mass Spectrometry (GC-MS) and their antibacterial activities were assessed. A total of 18 compounds representing 99.98% of leaves oil were identified. The oils of the plant are all dominated by monoterpenes. The main compounds of essential oil in leaves were Limonene (45.77%), α-Pinene (23.94%), β-Phellandrene (10.83%), β-Pinene (5.68%), o-Cymene (3.30%), respectively. The essential oils were tested against Staphylacoccus aureus, Bacillus subtilis, Pseudomanas aeruginosa, Enterecoccus faecalis, Salmonella typhimurium, and Escherichia coli strains using the disc diffusion method. The diameter of the inhibition zones formed for bacteria were measured. The essential oils of JOO found to be active against all of the tested microorganisms and showed the susceptible inhibition zones. However, they were not as much as effective against bacterial strains when compared to ampicillin and ofloxacin. The extracts of JOO showed most significant antibacterial activity against Escherichia coli with inhibition zone diameter of 15 mm. The lowest inhibition zone diameter was Staphylococcus aureus with 11 mm. © 2018, Centenary University. All rights reserved.
A New Genus (Leptaleum Dc.) Record for Turkey
(2007) Ünal, M.; Özgökçe, F.
The monotypic Leptaleum DC. (Cruciferae/Brassicaceae) is recorded for the first time from Turkey. The diagnostic characters of Leptaleum filifolium (Willd.) DC. are given and its ecology and conservation status are discussed. © TÜBİTAK.
A New Record for Turkey: Lepidium Pinnatifidum Ledeb. (Brassicaceae)
(2007) Ünal, M.; Özgökçe, F.; Behçet, L.; Karabacak, O.
Lepidium pinnatifidum Ledeb. (Brassicaceae) is recorded for the first time (B9 Muş) for the flora of Turkey. The diagnostic characters of L. pinnatifidum are described and its ecology and conservation are discussed. © TÜBİTAK.
A New Record for Turkey: Malcolmia Exacoides (Dc.) Spreng. (Brassicaceae)
(2007) Özgökçe, F.; Ünal, M.
Malcolmia exacoides (DC.) Spreng. (Brassicaceae) is recorded for the first time (C9 Siirt) for the flora of Turkey. The diagnostic characters of M. exacoides are given and its ecology and conservation status are discussed. © TÜBİTAK.
A New Record for Turkey: Malcolmia Intermedia C.a. Mey (Brassicaceae)
(2008) Ünal, M.; Özgökçe, F.
Malcolmia intermedia C.A.Mey. (Cruciferae/Brassicaceae) is recorded for the first time (A9 Kars) for the flora of Turkey. A description, scan, and distribution map of the species are given. © TÜBİTAK.
Secondary Metabolites From Astragalus Lycius and Their Cytotoxic Activities
(Natural Product Incorporation, 2016) Horo, I.; Kocabaş, F.; Alankuş-Çalişkan, O.; Özgökçe, F.; Khan, I.A.; Bedir, E.
Eight known secondary metabolites were isolated from the methanolic extract of the whole plant of Astragalus lycius Boiss. They were identified as 5,5'-dihydroxy-3'-methoxy-isoflavone-7-O-β-D-glucoside (1), genistin (2), sissotrin (3), 5,4'-dimethoxy-isoflavone-7-O-β-D-glucopyranoside (4), (7S,8R)-5-methoxydehydrodiconiferyl alcohol-4-O-β-D-glucopyranoside (5), 4-O-lariciresinol-glucoside (6), 2-phenylethyl-β-D-glucopyranoside (7) and β-sitosterol-3-O-β-D-glucopyranoside (8) by spectroscopic methods including 1H- and 13C-NMR and HR-MS experiments, and by comparison with literature values. Compounds 1-7 are reported for the first time from Astragalus taxa. All of the compounds were tested for their cytotoxic activities against a number of cancer cell lines. Among them, only 6 exhibited significant activity against human colon carcinoma (HT-29) at 2.69 μM concentration.
Zooplankton Composition of Van Lake Coastline in Turkey
(Academic Journals, 2010) Yildiz, S.; Özgökçe, M.S.; Özgökçe, F.; Karaca, I.; Polat, E.
This study was completed with periodical surveys in coastal band of Van Lake between May and September in 2005 to 2006 period. It was carried out on a total of 20 sites selected as sampling points and having three distinct characteristics. During the study, a total of 20 species (14 belonged to genus of Rotifera, 4 to Copepoda and 2 Branchiopoda) were found at the Van Lake coastal zone. Genera Notholca squamula, Keratella quadrata, Colurella colurus, Lecane ohiensis, Lecane grandis and Lecane lamellata have been detected for the first time at the Van Lake coastal zone. © 2010 Academic Journals.