Kurum Yazarı "Özek, Temel" Makale Koleksiyonu İçin Listeleme
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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 ... -
Antimicrobial activities of methanol extracts and essential oils of Rosmarinus officinalis, depending on location and seasonal variations
Yesil-Çeliktas, O.; Kocabaş, E. E. Hames; Bedir, E.; Sukan, F. Vardar; Özek, Temel; Başer, K. Hüsnü Can (Elsevier Sci LTD, 2007)Rosmarinus officinalis is widely found in the lands of Aegean and Mediterranean regions of Turkey. The goal of this work was to test the antimicrobial activity of the essential oils and methanolic extracts of R. officinalis ... -
Assessment of Endemic Cota fulvida (Asteraceae) for Phytochemical Composition and Inhibitory Activities against Oxidation, alpha-Amylase, Lipoxygenase, Xanthine Oxidase and Tyrosinase Enzymes
Özek, Gülmira; Özbek, M. Ufuk; Yur, Süleyman; Göğer, Fatih; Arslan, Münevver; Özek, Temel (Acg Publications, 2019)In the present work, chemical compositions of essential oil and methanol extract of endemic Cota fulvida (Grierson) Holub were investigated as well as their antioxidant, antidiabetic, antiinflammatory and antimelanogenesis ... -
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 ... -
Biological Evaluation, Overpressured Layer Chromatography Separation, and Isolation of a New Acetylenic Derivative Compound from Prangos platychlaena ssp platychlaena Fruit Essential Oils
Tabanca, Nurhayat; Wedge, David E.; Li, Xing-Cong; Gao, Zengping; Özek, Temel; Bernier, Ulrich R.; Özek, Gülmira (Akademiai Kiado Zrt, 2018)In the present work, fruits of Prangos platychlaena Boiss. ex Tchihat. ssp. platychlaena (Apiaceae) collected from eastern (sample A) and central (sample B) parts of Turkey were subjected to hydrodistillation to yield ... -
Chemical and Biological Diversity of the Leaf and Rhizome Volatiles of Acorus calamus L. from Turkey
Suzgec-Selçuk, Sevda; Özek, Gülmira; Meriçli, Ali Hikmet; Başer, K. Hüsnü Can; Haliloğlu, Yeşim; Özek, Temel (Taylor & Francis LTD, 2017)Two different isolation techniques, conventional hydrodistillation (HD) and micro-steam distillation-solid-phase microextraction (MSD-SPME), have been used to analyze the volatile constituents from the leaves and rhizomes ... -
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 bioactivity studies of Alpinia nigra essential oils
Ghosh, Sudipta; Özek, Temel; Tabanca, Nurhayat; Ali, Abbas; Rehman, Junaid Ur; Khan, Ikhlas A.; Rangan, Latha (Elsevier Science BV, 2014)Free radical scavenging, bactericidal and bitting deterrent properties of Alpinia nigra essential oils (EOs) were investigated in the present study. Chemical composition of the EOs was analyzed using GC MS/GC-FID which ... -
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 composition of essential oils from artemisia glabella kar. Et kir. and artemisia rupestris L. obtained by different extraction methods
Shaimerdenova, Z. R.; Makubayeva, A. I.; Özek, Temel; Özek, Gülmira; Yur, S.; Atazhanova, G. A.; Adekenov, S. M. (Badebio Biotechnololgy Ltd, 2018)The aim of the research was to investigate the chemical composition of essential oils and volatiles from two species of Artemisia glabella and Artemisia rupestris growing in Kazakhstan. Two different techniques, the ... -
Chemical composition of the wood and leaf oils from the "Clanwilliam Cedar" (Widdringtonia cedarbergensis J.A Marsh): A critically endangered species
Kamatou, G. P. P.; Viljoen, Alvaro M.; Özek, Temel; Başer, K. Hüsnü Can (Elsevier Science BV, 2010)Widdringtonia is the only genus of the 16 genera of Cupressaceae present in South Africa This genus is represented by three species in South Africa, W nodiflora, W schwarzu and W cedarbergensis (= W juniperoides) and the ... -
Chemical Composition, Antioxidant and Anticholinesterase Activities of the Essential oil of Origanum rotundifolium Boiss. from Turkey
Özbek, Hilal; Güvenalp, Zuhal; Özek, Temel; Sevindik, Handan G.; Yuca, Hafize; Yerdelen, Kadir O.; Demirezer, Lütfiye Ömür (Acg Publications, 2017)The essential oil was obtained by hydrodistillation from the aerial parts of Origanum rotundifolium Boiss. Its chemical content and composition were analyzed by using a gas chromatography (GC-FID) and gas chromatography-mass ... -
Chemical composition, antioxidant capacity, acetyl- and butyrylcholinesterase inhibitory activities of the essential oil of Thymus haussknechtii Velen
Sevindik, Handan G.; Özek, Temel; Yerdelen, K. Özden; Önal, Mehmet; Özbek, Hilal; Güvenalp, Zuhal; Demirezer, L. Ömür (ACG Publications, 2016)The chemical composition of the essential oil from the aerial parts of Thymus haussknechtii Velen. was analyzed by using gas chromatography (GC-FID) and gas chromatography-mass spectrometry (GC-MS). The major component of ... -
Chemical Diversity in Volatiles of Helichrysum plicatum DC. Subspecies in Turkey
Öztürk, Bintug; Özek, Gülmira; Özek, Temel; Başer, K. Hüsnü Can (Acg Publications, 2014)In the present work three subspecies of Helichrysum plicatum DC. (Helichrysum plicatum DC. subsp. plicatum, Helichrysum plicatum DC. subsp. polyphillum (Ledeb) P.H. Davis & Kupicha and Helichrysum plicatum DC. subsp. ... -
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) ... -
A comparative study of the essential oils of wild and cultivated Satureja hortensis L.
Başer, K. Hüsnü Can; Özek, Temel; Kırımer, Neşe; Tümen, Gülendam (Allured Publ Corp, 2004)The essential oils from 20 samples of wild and cultivated collections of Satureja hortensis L. were investigated by GC and GC/MS. The oils from cultivated forms contained carvacrol (42-63%) as the major constituent. Thymol ... -
Comparison of essential oil of Xanthogalum purpurascens Lallem. obtained via different isolation techniques
Özek, Gülmira; Özek, Temel; Başer, K. Hüsnü Can; Duran, Ahmet; Sağıroğlu, M (Allured Publ Corp, 2006)The 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 ... -
Comparison of hydrodistillation and microdistillation methods for the analysis of fruit volatiles of Prangos pabularia Lindl., and evaluation of its antimicrobial activity
Özek, Gülmira; Özek, Temel; İşcan, Gökalp; Başer, K. Hüsnü Can; Hamzaoğlu, Ergin; Duran, Ahmet (Elsevier Science BV, 2007)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 ... -
Comparison of microwave-assisted hydrodistillation and hydrodistillation methods for the analysis of volatile secondary metabolites
Koşar, Müberra; Özek, Temel; Göğer, Fatih; Kürkçüoğlu, Mine; Başer, K. Hüsnü Can (Taylor & Francis Inc, 2005)Microwave-assisted hydrodistillation (MWHD) and hydrodistillation (HD) were carried out for the analysis of volatile components in Whole and ground fruits of Anethum graveolens L. (dill seed) and Coriandrum sativum L. ...