PubMed İndeksli Yayınlar Koleksiyonu by Institution Author "Özek, Temel"
Now showing items 1-18 of 18
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11-Hydroxy-2,4-cycloeudesmane from the Leaf Oil of Juglans regia and Evaluation of its Larvicidal Activity
Köroğlu, Ayşegül; Baldemir, Ayşe; Özek, Gülmira; Bedir, Erdal; Tabanca, Nurhayat; Ali, Abbas; Özek, Temel (Sage Publications Inc, 2016)Leaves of Juglans regia L. collected from two different locations [Adana (A) and Ankara (BA from Turkey were subjected to hydrodistillation in a Clevenger type apparatus to yield the essential oils (EOs). GC/MS and GC-FID ... -
Betulenols from Betula species
Demirci, Betül; Başer, K. Hüsnü Can; Özek, Temel; Demirci, Fatih (Georg Thieme Verlag, 2000)The essential oils from buds of five Betula species growing in Turkey were investigated by CC-MS. A major component in the essential oils was shown to be 14-hydroxy-beta-caryophyllene (6). The structure of beta-betulenal ... -
Bioactivity-Guided Fractionation and GC/MS Fingerprinting of Angelica sinensis and Angelica archangelica Root Components for Antifungal and Mosquito Deterrent Activity
Wedge, David E.; Klun, Jerome A.; Tabanca, Nurhayat; Demirci, Betül; Özek, Temel; Başer, K. Hüsnü Can; Zhang, Jian (American Chemical Society, 2009)Bioassay-guided fractionation of the chloroform extract from the roots of Angelica sinensis led to isolation and characterization of (Z)-ligustilide using direct-bioautography with Colletotrichum species. The structure of ... -
Chemical Composition and Antibacterial Activity of Essential Oils from Ferula L. Species against Methicillin-Resistant Staphylococcus aureus
Utegenova, gülzhakhan A.; Pallister, Kyler B.; Kushnarenko, Svetlana V.; Özek, Gülmira; Özek, Temel; Abidkulova, Karime T.; Voyich, Jovanka M. (MDPI, 2018)Essential oils (EOs) were obtained by hydrodistillation of various parts of Ferula ovina (Boiss.) Boiss., Ferula iliensis Krasn. ex. Korovin, and Ferula akitschkensis B. Fedtsch. ex Koso-Pol., collected in the flowering/budding ... -
Chemical composition and phagocyte immunomodulatory activity of Ferula iliensis essential oils
Özek, Gülmira; Schepetkin, Igor A.; Utegenova, gülzhakhan A.; Kirpotina, Liliya N.; Andrei, Spencer R.; Özek, Temel; Quinn, Mark T. (Wiley, 2017)Essential oil extracts from Ferula iliensis have been used traditionally in Kazakhstan for treatment of inflammation and other illnesses. Because little is known about the biologic activity of these essential oils that ... -
Chemical Diversity of Volatiles of Teucrium orientale L. var. orientale, var. puberulens, and var. glabrescens Determined by Simultaneous GC-FID and GC/MS Techniques
Özek, Gülmira; Özek, Temel; Dinç, Muhittin; Doğu, Süleyman; Başer, K. Hüsnü Can (Wiley-V C H Verlag GMBH, 2012)In the present work, three varieties of Teucrium orientale, var. orientale, var. puberulens, and var. glabrescens, were collected and investigated for chemical composition of the oils. Subsequent gas chromatography (GC-FID) ... -
Composition of the Essential Oil of Calamintha-Grandiflora
Başer, K. Hüsnü Can; Özek, Temel (Georg Thieme Verlag, 1993)… -
The Essential Oil Composition of Dictamnus-Albus From Turkey
Başer, K. Hüsnü Can; Koşar, Müberra; Malyer, Hulusi; Özek, Temel (Georg Thieme Verlag, 1994)… -
Essential oils of annual Sideritis species growing in Turkey
Kırımer, Neşe; Tabanca, Nurhayat; Özek, Temel; Tümen, Gülendam; Başer, K. Hüsnü Can (Swets Zeitlinger Publishers, 2000)Water distilled essential oils of five annual Sideritis species collected from different regions of Turkey were analysed by GC/MS. Results are tabulated and compared with main components of the essential oils of perennial ... -
Essential Oils of Echinophora lamondiana (Apiales: Umbelliferae): A Relationship Between Chemical Profile and Biting Deterrence and Larvicidal Activity Against Mosquitoes (Diptera: Culicidae)
Ali, Abbas; Tabanca, Nurhayat; Özek, Gülmira; Özek, Temel; Aytaç, Zeki; Bernier, Ulrich R.; Khan, Ikhlas A. (Oxford University Press Inc, 2015)The essential oils from the flower, leaf, and stem of Echinophora lamondiana B. Yildiz et Z. Bahcecioglu were analyzed by gas chromatography-flame ionization detection and gas chromatography-mass spectrometry. In total, ... -
Furanocoumarin Content, Antioxidant Activity, and Inhibitory Potential of Heracleum verticillatum, Heracleum sibiricum, Heracleum angustisectum, and Heracleum ternatum Extracts against Enzymes Involved in Alzheimer's Disease and Type II Diabetes
Özek, Gülmira; Yur, Süleyman; Göğer, Fatih; Özek, Temel; Andjelkovic, Boban; Godjevac, Dejan; Trendafilova, Antoaneta (Wiley-V C H Verlag GMBH, 2019)Hexane extracts of Heracleum verticillatum, H. sibiricum, H. angustisectum, and H. ternatum were studied for their furanocoumarin content antioxidant potential and acetylcholinesterase and -amylase inhibitory activities. ... -
Gas chromatographic-mass spectrometric analysis of essential oils from Pimpinella species gathered from Central and Northern Turkey
Tabanca, Nurhayat; Demirci, Betül; Özek, Temel; Kırımer, Neşe; Başer, K. Hüsnü Can; Bedir, E; Wedge, Davm E. (Elsevier Science BV, 2006)Essential oils from 15 Pimpinella species were analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) techniques. One species, Pimpinella anisum, in which only fruits were evaluated, was also ... -
Gas chromatographic-mass spectrometric analysis of volatiles obtained by four different techniques from Salvia rosifolia Sm., and evaluation for biological activity
Özek, Gülmira; Demirci, Fatih; Özek, Temel; Tabanca, Nurhayat; Wedge, David E.; Khan, Shabana I.; Hamzaoğlu, Ergin (Elsevier Science BV, 2010)Four different isolation techniques, conventional hydrodistillation (HD), microwave-assisted hydrodistillation (MWHD), microdistillation (MD) and micro-steam distillation-solid-phase microextraction (MSD-SPME), have been ... -
Isolation of natural products by preparative gas chromatography
Özek, Temel; Demirci, Fatih (2012)Chromatography is a process for the separation of compounds from the mixtures. Gas chromatography (GC) is one of the most important and common techniques in separation science. The main focus of this chapter is to demonstrate ... -
One-step multiple component isolation from the oil of Crinitaria tatarica (Less.) Sojak by preparative capillary gas chromatography with characterization by spectroscopic and spectrometric techniques and evaluation of biological activity
Özek, Gülmira; Ishmuratova, Margarita; Tabanca, Nurhayat; Radwan, Mohammed M.; Göğer, Fatih; Özek, Temel; Başer, K. Hüsnü Can (Wiley-V C H Verlag GMBH, 2012)Gas chromatographic analysis revealed that the oil of Crinitaria tatarica was rich in sabinene (32.1%), beta-pinene (8.8%), and two unknown (M+200) compounds (I) and (II) (21.4% and 3.4%). One-step multiple fractionation ... -
Preparative Capillary GC for Characterization of Five Dracocephalum Essential Oils from Mongolia, and their Mosquito Larvicidal Activity
Özek, Gülmira; Tabanca, Nurhayat; Radwan, Mohammed M.; Shatar, Sanduin; Altantsetseg, Altaa; Baatar, Dumaajav; Özek, Temel (Natural Products Inc, 2016)The chemical composition and mosquito larvicidal and adulticidal activity of five essential oils (EOs),Dracocephalum ruyschiana L. (DR), D. foetidum Bunge (DF), D. moldavica L. (DM), D. fruticztlosum Steph. ex Willd. (DFr) ... -
A simple method to obtain essential oils from Salvia triloba L. and Laurus nobilis L. by using microwave-assisted hydrodistillation
Koşar, Müberra; Tunalıer, Zeynep; Özek, Temel; Kürkçüoğlu, Mine; Başer, K. Hüsnü Can (Verlag Z Naturforsch, 2005)A microwave-assisted hydrodistillation protocol was modified to extract essential oils from leaves of Salvia triloba L. and Laurus nobilis L. The essential oils of these plants are generally obtained by hydrodistillation ...