Yazar "Özer, Züleyha" için listeleme
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Chemical composition and antioxidant activities of leaf and flower essential oils of origanum onites l. (lamiaceae) growing in mount ida-Turkey
Özer, Züleyha (Turkish Chemical Society, 2020)The chemical composition of leaf and flower essential oils of Origanum onites L. were analyzed using Thermo Scientific TSQ GC-MS/MS. Also, antioxidant activities of the leaf and flower essential oils were investigated ... -
Comparative experimental and theoretical study on the molecular structure and spectroscopic properties of sideroxol isolated from Sideritis stricta and its electronic properties
Azizoğlu, Akın; Özer, Züleyha; Çarıkçı, Sema; Kılıç, Turgut (Taras Shevchenko Natl Univ Kyiv, 2021)Sideroxol, a kaurene diterpene, was obtained from the acetone extract of Sideritis stricta plant. The ground-state molecular geometry, vibrational frequencies, and NMR chemical shifts were also investigated by using various ... -
Determination of secondary metabolites of Origanum vulgare subsp. hirtum and O. vulgare subsp. vulgare by LC-MS/MS
Özer, Züleyha; Çarıkçı, Sema; Yılmaz, Hasibe; Kılıç, Turgut; Dirmenci, Tuncay; Gören, Ahmet Ceyhan (ACG Publications, 2020)Secondary metabolites of solvent extracts of Origanum vulgare subsp. hirtum and O. vulgare subsp. vulgare were determined using liquid chromatography-mass spectrometry (LC-MS/MS). Curcumin was used as an internal standard. ... -
Effect of different drying methods and development stages on the essential oil chemical composition of aerial parts of origanum vulgare l. subsp. hirtum (link) letsw
Özer, Züleyha; Kılıç, Turgut; Selvi, Selami; Paşa, Cenk (Taylor & Francis Ltd, 2018)In this study, the effects of different methods of drying (sun, shade, and oven-drying at 45 degrees C for 12 hours) and development stages (pre, full, and post-flowering) on the essential oil composition and yield ratio ... -
An experimental and theoretical study on siderol isolated from sideritis species
Azizoğlu, Akın; Özer, Züleyha; Kılıç, Turgut (Inst Organic Chem and Biochem, 2011)The Fourier transform infrared (FTIR) spectrum of siderol, extracted from the aerial parts of Sideritis Gulendamii, has been measured in the range 4000-400 cm(-1). Vibrational assignments and analyses of the fundamental ... -
Investigation of phenolic compounds and antioxidant activity of mentha spicata subsp. Spicata and M. longifolia subsp. typhoides (briq.) Harley decoction and infusion
Özer, Züleyha (Turkish Chemical Society, 2018)In the present study, phenolic compounds and antioxidant activity of decoction and infusion of aerial parts of Mentha spicata subsp. spicata and M. longifolia subsp. typhoides (Briq.) Harley were investigated. Phenolic ... -
An investigation on the determination of diurnal and ontogenetic variations of essential oil composition in sideritis trojana growing in kazdagi (Edremit-Balikesir)
Paşa, Cenk; Selvi, Selami; Özer, Züleyha; Kılıç, Turgut (Kahramanmaraş Sütçü Imam Univ Rektörlüğü, 2019)This study was conducted to determine the essential oil composition and diurnal variations (9.00 am, 12.00 am and 16.00 pm) of Sideritis trojana Bornm. which was distributed naturally at the peak of Kazdagi. (Edremit-Balikesir), ... -
The phenolic compounds, antioxidant and anticholinesterase activities of cyclotrichium origanifolium (labill.) manden & scheng and thymus sipyleus boiss teas from Turkey
Özer, Züleyha (Univ Babes-Bolyai, 2019)In this study, phenolic compounds, antioxidant and anticholinesterase activities of Cyclotrichium origanifolium (Labill.) Manden & Scheng and Thymus sipyleus Boiss teas were investigated. Two methods were used for the ... -
The phenolic contents, antioxidant and anticholinesterase activity of section Amaracus (Gled.) Vogel and Anatolicon Ietsw. of Origanum L. species
Özer, Züleyha; Gören, Ahmet Ceyhan; Kılıç, Turgut; Öncü, Merve; Çarıkçı, Sema; Dirmenci, Tuncay (Elsevier, 2020)Origanum boissieri Ietsw., O. saccatum P.H.Davis, O. solymicum P.H.Davis and O. ayliniae Dirmenci & T.Yazici belonging to sect. Amaracus (Gled.) Vogel, O. sipyleum L. and O. hypericifolium O.Schwarz & P.H.Davis belonging ... -
Quantitative determination of some phenolics in Origanum laevigatum Boiss. extracts via validated LC-MS/MS method and antioxidant activity
Çarıkcı, Sema; Kılıç, Turgut; Özer, Züleyha; Dirmenci, Tuncay; Arabacı, Turan; Gören, Ahmet Ceyhan (ACG Publications, 2018)In this study, quantities of some phenolics; caffeic acid, (E)-ferulic acid, rosmarinic acid, chlorogenic acid, fumaric acid, gallic acid, pyrogallol and vanillin in the directly methanol (M1), chloroform (C), acetone (Ac) ... -
Sideritis L. (Lamiaceae) türlerinden izole edilen siderol bileşiği üzerine deneysel ve hesapsal çalışmalar
Özer, Züleyha (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2010)Sideritis L. (Lamiaceae) cinsi, Türkiye’de 36’i endemik 46 tür ile temsil edilmektedir. Türkiye’de yetişen Sideritis türleri uçucu yağları, diterpen ve flavonoid bileşikleri bakımından zengindir. Sideritis türlerinden izole ... -
Synthesis, molecular structure, DFT calculations and biological activity of acetoxy linearol
Özer, Züleyha (Springer, 2020)Acetoxy linearol (ent-3 beta,7 alpha,18-triacetoxykaur-16-ene), a natural compound was synthesized from linearol isolated from endemic Sideritis species and structurally characterized using diverse spectroscopic techniques ... -
Synthesis, structural characterization, spectroscopic properties, and theoretical investigation of siderol acetate
Özer, Züleyha; Kılıç, Turgut; Çarıkçı, Sema; Azizoğlu, Akın (Maik Nauka, 2019)In the present study, siderol acetate (1) was synthesized from siderol isolated from endemic Sideritis species, then its chemical structure was determined by using various spectroscopic methods (FT-IR, H-1 NMR, and C-13 ...
