Yazar "Kuyumcu, Ebru" seçeneğine göre listele
Listeleniyor 1 - 10 / 10
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe CHEMICAL COMPOSITION AND ANTIMICROBIAL ACTIVITIES OF THE ESSENTIAL OILS OF Teucrium orientale var. orientale AND Teucrium orientale var. puberulens(Springer, 2011) Kucukbay, F. Zehra; Yildiz, Bayram; Kuyumcu, Ebru; Gunal, Selami[Abstract Not Available]Öğe Chemical composition and antimicrobial activity of essential oil of Achillea cretica L. (Asteraceae) from Turkey(Taylor & Francis Ltd, 2012) Kucukbay, F. Zehra; Kuyumcu, Ebru; Bilenler, Tuce; Yildiz, BayramHydrodistilled volatile oil from the aerial parts of Achillea cretica L. (Asteraceae) was analysed by a combination of GC and GC/MS. Seventy-six components were identified, constituting 86.4% of the oil. The main constituents of the essential oil were caryophylladienol-II (13.4%), beta-maaliene (6.1%), neo-intermedeol (6.0%), carvone (4.9%), spathulenol (4.5%), palmitic acid (3.3%) and selina-3,11-dien-6 alpha-ol (3.2%). The antimicrobial activity was evaluated by the broth-dilution method on nine microbial strains and showed to be quite strong against the Gram-positive bacteria Staphylococcus aureus and Bacillus cereus. The antibacterial properties of A. cretica justify its use in traditional medicine for the treatment of wounds, contaminated through bacterial infections.Öğe Chemical Composition and Antimicrobial and Antioxidant Activities of three Turkish Thyme Essential Oils(Taylor & Francis Ltd, 2013) Kucukbay, F. Zehra; Kuyumcu, Ebru; Celen, Selma; Azaz, Ayse Dilek; Arabaci, Turan; Yildiz, BayramThe aim of present study was to compare the antioxidant and antimicrobial activities of three Thymus kotschyanus varieties on the basis of the chemical compositions of oils obtained by hydrodistillation. GC-MS analysis of the isolated essential oils from aerial parts of Thymus kotschyanus Boiss. & Hohen. var. eriophorus (Ronniger) Jalas, Thymus kotschyanus Boiss. & Hohen. var. kotschyanus and Thymus kotschyanus Boiss. & Hohen. var. glabrascens resulted in the identification of 55,, 34 and 57 constituents, respectively. The major components in the essential oils of T. kotschyanus Boiss. & Hohen. var. eriophorus (Ronniger) Jalas and T. kotschyanus Boiss. & Hohen. var. kotschyanus were described as geraniol (55.0-59.1 %) and geranyl acetate (27.1-28.8 %). The oil of T. kotschyanus Boiss. & Hohen. var. glabrascens is characterized by the high monoterpene fraction (86.5 %) and especially by the presence of carvacrol (57.2 %) and its precursor p-cymene (11.0 %). The essential oils were studied in vitro for antimicrobial activity (as inhibition zone and MIC) against fourteen bacteria strains using agar disc diffusion and broth micro-dilution methods. The oils exhibited moderate zone of inhibitions against bacteria when compared to standard antibiotics ketoconazol and chloramphenicol used as controls. The samples were subjected to a screening for their possible antioxidant activities by using 2,2-diphenyl-1-picrylhydrazyl (DPPH). When compared with the antioxidative potentials of the standard compound used in this study (BHA), essential oils of the T. kotschyanus varieties studied exerted remarkable antioxidant activity.Öğe Chemical Composition of the Essential Oils of Three Thymus Taxa from Turkey with Antimicrobial and Antioxidant Activities(Acg Publications, 2014) Kucukbay, F. Zehra; Kuyumcu, Ebru; Celen, Selma; Azaz, Ayse Dilek; Arabaci, TuranGC-MS analysis of the essential oils from aerial parts of Thymus migricus Klokov & Des.-Shost, Thymus fallax Fisch. & Mey. and Thymus pubescens Boiss. & Kotschy ex Celak var. pubescens resulted in the identification of 26, 35 and 53 constituents, respectively. The major components in the essential oil of T. migricus were found to be alpha-terpineol (30.6%), thymol (20.7%) and alpha-terpinyl acetate (14.9%) while in the essentiol oil of T. fallax cis-carveol (29.6%) and alpha-terpineol (10.8%). Carvacrol was a dominant compound with a percentage 66.1% of the essential oil of T. pubescens var. pubescens. The data obtained indicate that the essential oils of Thymus species generally exhibit some bacteriostatic activity. The antioxidant activity of the tested essential oils were found to be slightly lower than butylatedhydroxyanisole (BHA).Öğe Determination of Elements by Atomic Absorption Spectrometry in Medicinal Plants Employed to Alleviate Common Cold Symptoms(Office Spectroscopy & Spectral Analysis, 2014) Kucukbay, F. Zehra; Kuyumcu, EbruEleven important medicinal plants generally used by the people of Turkey for the treatment of common cold have been studied for their mineral contents. Eleven minor and major elements (essential, non-essential and toxic) were identified in the Asplenium adiantum-nigrum L., Althaea of ficinalis L., Verbascum Phlomoides L., Euphorbia chamaesyce L., Zizyphus jujube Miller, Peganum harmala L., Arum dioscoridis Sm., Sambucus nigra L., Piper longum L., Tussilago far fara L. and Elettaria cardamomum Maton by employing flame atomic absorption and emission spectrometry and electro-thermal atomic absorption spectrometry. Microwave digestion procedure for total concentration was applied under optimized conditions for dissolution of medicinal plants. Plant based biological certified reference materials (CRMs) served as standards for quantification. These elements are found to be present in varying concentrations in the studied plants. The baseline data presented in this work can be used in understanding the role of essential, non-essential and toxic elements in nutritive, preventive and therapeutic properties of medicinal plants.Öğe Determination of Minerals and Trace Elements in Soils and The Relation with its Concentrations in Sugar Beets(Asian Journal Of Chemistry, 2010) Kucukbay, F. Zehra; Kuyumcu, Ebru; Karaca, Idil; Ozdemir, DurmusTwelve sugar beets and corresponding soil samples from the plantation near Malatya. Turkey were analyzed for mineral and trace element contents Thirteen metals (Al, Ca. Cd, Cu. Fe. K. Mg, Mn. Na, Ni, Pb, Sc and Zn) were selected and analyzed quantitatively by FAAS/FAES and ETAAS. Principal component analysis and hierarchical cluster analysis were used to explore samples based on the element contents. The principal component analysis analysis of sugar beet samples yielded five principal components which were able to explain about 84% of the total variance in the data set. The number of principal components that are higher than one was four for the soil samples and were able to explain 83% of total variance Hierarchical cluster analysis of sugar beet samples and corresponding soil samples resulted in two main clusters based on the geographic regions of the samples In terms of the elements being analyzed, the hierarchical cluster analysis method resulted in 3-4 clusters of the elements in both sugar beet and soil samplesÖğe Determination of trace element contents of Thymus species from Turkey(Turkish Journal of Chemistry, 2010) Küçükbay, F. Zehra; Kuyumcu, EbruÖz: Başlık (İngilizce): Öz (İngilizce): Eleven mineral and trace elements (Mg, Ca, K, Fe, Mn, Al, Zn, Cu, Cd, Ni, and Pb) were determined in the Thymus species growing in Turkey. The total concentrations were measured in samples mineralized with concentrated nitric acid and hydrogen peroxide in a microwave system. The determination of mineral and trace elements in the leaves of the Thymus species was carried out by flame and graphite furnace atomic absorption spectrometry. The accuracy of the method was ensured by using standard reference material (NIST-SRM 1515 apple leaves). The concentration of elements in the Thymus species and their biological activity on humans is discussed.Öğe Essential Oil Composition from the Aerial Parts of Ajuga orientalis L. Growing in Turkey(Asian Journal Of Chemistry, 2013) Kucukbay, F. Zehra; Kuyumcu, Ebru; Yildiz, BayramThe essential oil obtained from the aerial parts of Ajuga orientalis L. (Lamiaceae) was analyzed by using GC and GC-MS. Thirty compounds representing 95.4 % of the oil were identified. The main compounds were phytol (36.7 %), n-hexadecanoic acid (14.2 %) and dodecanoic acid (12.2 %).Öğe Essential Oil Composition of Thymus eriocalyx (Ronniger) Jalas from Turkey(Asian Journal Of Chemistry, 2010) Kucukbay, F. Zehra; Kuyumcu, EbruHydrodistilled volatile oil from the aerial parts of Thymus eriocalyx (Ronniger) Jalas was analyzed by a combination of GC and GC-MS Seventy compounds were identified, representing 98.54 % of the oil The major components were found to be thymol (47 79 %). beta-caryophyllene (11.98 %), 1,8-cineole (9 88 %), borneol (3 88 %), p-cymene (3 02 %), carvacrol methyl ether (2 99 %), gamma-terpinene (2 97 %) and germacrene D (2 83 %)Öğe Soğuk algınlığında kullanılan halk ilaçlarında uçucu yağ, mineral ve eser elementlerin tayini(İnönü Üniversitesi, 2009) Kuyumcu, EbruBaharatlar ve bitkiler farklı bioaktif bileşiklerce zengindir ve sağlık üzerindeki yararlı etkileri iyi bilinmektedir. Şifalı bitkiler soğuk algınlığından, kansere bir çok hastalığın tedavisinde halk ilacı olarak kullanılmaktadır. Şifalı bitkiler, organik bileşikler, uçucu yağlar, glikosidler, vitaminler, alkaloitler ve diğer aktif bileşenleri içerirler. Bazı organik bileşikler ve uçucu yağların yanı sıra, bazı eser elementlerin, genel iyileşmede ve de hastalıkların tedavisinde çok önemli rol aldığı doğrulanmaktadır. Bu çalışmanın amacı, soğuk algınlığı tedavisinde kullanılan bazı bitkilerdeki uçucu yağların bileşenlerini ve eser elementleri tayin etmektir. Bitki materyallerinin kurutulmuş toprak üstü kısımları, Clevenger aparatı kullanılarak hidrohistilasyona tabi tutulmuştur. Elde edilen yağlar, GC/FID ve GC/MS metotlarıyla analizlenmiştir. Uçucu bileşikler, çalışılan bileşenlerin kütle spektrumları ve alıkonma indekslerinin uyuşumuna bağlı olarak teşhis edilmiştir. Bağıl alıkonma indekslerinin (RRI) hesaplanmasında alkanlar, referans nokta olarak kullanılmıştır. Kütüphane taraması, Wiley GC/MS Kütüphanesi, Adams Kütüphanesi ve NIST05 kullanılarak gerçekleştirilmiştir. Eser elementlerin tayini, kuru yakma, yaş yakma ve mikro dalga ile çözünürleştirme yöntemlerinden sonra, alev ve grafit fırın atomik absorpsiyon spektrometre tekniği (Cu, Mn, Zn, Fe, Al, K, Mg, Ca elementleri Alevli-AAS, Pb, Ni, Cd, Se elementleri GF-AAS ile analizlendi) kullanılarak gerçekleştirildi. Anahtar Kelimeler: Şifalı Bitkiler, Uçucu Yağ, Gaz Kromatografisi, Eser Elementler, Atomik Absorpsiyon Spektrometresi.
