Yazar "Öztürk, Mehmet" için PubMed İndeksli Yayınlar Koleksiyonu listeleme
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A Detailed Biological and Chemical Investigation of Sixteen Achillea Species' Essential Oils via Chemometric Approach
Yener, İsmail; Yilmaz, Mustafa Abdullah; Ölmez, Özge Tokul; Akdeniz, Mehmet; Tekin, Fetullah; Haşimi, Nesrin; Ertaş, Abdulselam (Wiley-V C H Verlag Gmbh, 2020)Representatives of the Achillea genus are widely used as foods or nutraceuticals. Considering the increasing demand for herbal dietary supplements with health promoting effects, the objective of this research was to evaluate ... -
A Detailed Chemical and Biological Investigation of Twelve Allium Species from Eastern Anatolia with Chemometric Studies
Izol, Ebubekir; Temel, Hamdi; Yılmaz, Mustafa Abdullah; Yener, İsmail; Ölmez, Özge Tokul; Kaplaner, Erhan; Fırat, Mehmet; Hasimi, Nesrin; Öztürk, Mehmet (Wiley, 2021)Allium species are widely consumed as food all over the world. The phenolic profile of ethanol extracts of aerial parts and roots of 12 Allium species, collected from five different Eastern Anatolia regions, were studied ... -
Development and Validation of a Novel LC–MS/MS Method for the Quantitation of 19 Fingerprint Phytochemicals in Salvia Species: A Chemometric Approach
Yılmaz, Mustafa Abdullah; Ertaş, Abdulselam; Yener, İsmail; Tokul Ölmez, Özge; Fırat, Mehmet; Temel, Hamdi; Öztürk, Mehmet; Kolak, Ufuk (Oxford Academic, 2021)Being traditionally utilized mainly as appetizers and herbal teas as well as used to ease abdominal pains, colds and gastrointestinal issues, the genus Salvia L. has gained significant consideration owing to its remarkable ... -
Effect of Sideritis leptoclada against HT-144 human malignant melanoma
Aydogmus-Ozturk, Fatma; Gunaydin, Keriman; Öztürk, Mehmet; Jahan, Humera; Duru, Mehmet E.; Choudhary, Muhammad I. (Lippincott Williams & Wilkins, 2018)Sideritis leptoclada O. Schwarz et P.H. Davis extracts were evaluated for its singlet oxygen production capacity using spectrophotometric method. The extracts producing singlet oxygen were then evaluated for cytotoxicity ... -
The Effect of Temperature on the Essential Oil Components of Salvia potentillifolia Obtained by Various Methods
Öztürk, Mehmet; Tel-Çayan, Gülsen; Duru, Mehmet Emin; Harmandar, Mansur; Topcu, Gülaçtı (Sage Publications Inc, 2009)The chemical compositions of the essential oils of Salvia potentillifolia (Lamiaceae) were analyzed by GC and GC-MS. The oils were obtained by four different methods (hydrodistillation, steam distillation, and two extraction ... -
Essential Oil, Aroma, and Fatty Acid Profiles of Five Endemic Salvia Taxa from Turkey with Chemometric Analysis
Ertaş, Abdulselam; Akdeniz, Mehmet; Yener, İsmail; Öztürk, Mehmet; Tokul Ölmez, Özge; Fırat, Mehmet; Kolak, Ufuk (Wiley, 2021)The essential oil, aroma, and fatty acid compositions of Salvia cerino-pruinosa var. cerino-pruinosa, S. cerino-pruinosa var. elazigensis, S. pseudeuphratica, S. rosifolia, and S. kurdica collected in 2015, 2016, and 2017 ... -
Evaluation of fruit extracts of six Turkish Juniperus species for their antioxidant, anticholinesterase and antimicrobial activities
Öztürk, Mehmet; Tumen, Ibrahim; Uğur, Aysel; Aydogmus-Ozturk, Fatma; Topcu, Gulacti (Wiley, 2011)BACKGROUND: Juniperus L. (Cupressaceae) species are mostly spread out in the Northern Hemisphere of the world, and some of them are used as folkloric medicines. The fruits of some species are eaten. Since oxidative stress ... -
GC-MS Analysis and Antimicrobial Activity of Essential Oil of Stachys cretica subsp smyrnaea
Öztürk, Mehmet; Duru, Mehmet Emin; Aydoğmuş-Öztürk, Fatma; Harmandar, Mansur; Mahlıçlı, Melda; Kolak, Ufuk; Ulubelen, Ayhan (Natural Products Inc, 2009)The essential oil from the aerial parts of Stachys cretica L. subsp. smyrnaea Rech. fil. (Lamiaceae), endemic to Turkey, was investigated by using GC and GC-MS. Thirty-four of 37 components, represented 99.7% of the total ... -
GC-MS Analysis of the Antioxidant Active Fractions of Micromeria juliana with Anticholinesterase Activity
Öztürk, Mehmet; Kolak, Ufuk; Duru, Mehmet Emin; Harmandar, Mansur (Natural Products Inc, 2009)The aerial parts of Micromeria juliana (L.) Bentham ex Reichb. were extracted with light petroleum, acetone and methanol, successively. The antioxidant activity of different concentrations of the extracts was evaluated ... -
Green synthesis of multifunctional carbon coated copper oxide nanosheets and their photocatalytic and antibacterial activities
Bibi, Hamida; Iqbal, Mudassar; Wahab, Hassan; Öztürk, Mehmet (Nature Publising Group, 2021)The studies of metal oxides in environmental remediation of chemical and biological pollutants are gaining colossal importance. Herein, we report the facile synthesis of multifunctional copper oxide nanosheets (CuO NS) ... -
In vitro antioxidant, anticholinesterase and antimicrobial activity studies on three Agaricus species with fatty acid compositions and iron contents: A comparative study on the three most edible mushrooms
Öztürk, Mehmet; Duru, Mehmet Emin; Kıvrak, Şeyda; Mercan-Doğan, Nazime; Turkoğlu, Aziz; Özler, Mehmet Ali (Pergamon-Elsevier Science Ltd, 2011)The fatty acids of Agaricus essettei, Agaricus bitorquis and Agaricus bisporus were investigated by using GC and GC-MS. The dominant fatty acids were found to be linoleic (61.82-67.29%) and palmitic (12.67-14.71%) acids ... -
Isolation and characterization of chemical constituents from Chaerophyllum bulbosum roots and their enzyme inhibitory and antioxidant effects
Tel Çayan, Gülsen; Deveci, Ebru; Molo, Zeynep; Duru, Mehmet Emin; Öztürk, Mehmet (Walter de Gruyter GmbH, 2021)Isolation and bioactive effects of the roots of Chaerophyllum bulbosum L. were firstly investigated herein. Enzyme (acetylcholinesterase, butyrylcholinesterase, urease, α-amylase, α-glucosidase, and tyrosinase) inhibitory ... -
Isolation, characterization, and bioactivities of compounds from Fuscoporia torulosa mushroom
Deveci, Ebru; Tel-Cayan, Gulsen; Duru, Mehmet Emin; Öztürk, Mehmet (Wiley, 2019)Chromatographic purification of Fuscoporia torulosa extracts resulted in the isolation and characterization of a new steroid, 5 alpha,8 alpha-epidioxyergosta-6,22-dien-3 beta-il-palmitate (1) and 10 known compounds (2-11). ... -
Isolation, structural characterization, and biological activities of galactomannans from Rhizopogon luteolus and Ganoderma adspersum mushrooms
Tel-Çayan, Gülsen; Muhammad, Akhtar; Deveci, Ebru; Duru, Mehmet Emin; Öztürk, Mehmet (Elsevier B.V., 2020)Polysaccharides are essential compounds that contribute to the biological activities of mushrooms. Two new galactomannans (Galactomannan I and II) were isolated from R. luteolus and G. adspersum. Their structures were ... -
Minerals and metals in mushroom species in Anatolia
Tel, Gülsen; Çavdar, Hamide; Deveci, Ebru; Öztürk, Mehmet; Duru, Mehmet E.; Türkoğlu, Aziz (Taylor & Francis Ltd, 2014)Mineral and metal contents of 24 wild mushroom species collected from Anatolia were analysed by inductively coupled plasma optical emission spectrometry. Eight minerals (Na, Mg, Ca, Mn, Fe, Zn, P and K) and six metals (Cr, ... -
A new fatty acid ester from an edible mushroom Rhizopogon luteolus
Tel-Cayan, Guelsen; Muhammad, Akhtar; Duru, Mehmet Emin; Öztürk, Mehmet; Adhikari, Achyut; Turkoglu, Aziz (Taylor & Francis Ltd, 2016)Phytochemical investigation of the Rhizopogon luteolus Fr. led to the isolation of one new fatty acid ester, 3-hydroxy-2,4-dimethylheptacosyl acetate (1) together with two knowncompounds tetracosanoic acid (2) and ergosterol ... -
New piperidine-hydrazone derivatives: Synthesis, biological evaluations and molecular docking studies as AChE and BChE inhibitors
Karaman, Nurcan; Sıcak, Yusuf; Taşkın-Tok, Tuğba; Öztürk, Mehmet; Karaküçük-İyidoğan, Ayşegül; Dikmen, Miris; Oruç-Emre, Emine Elçin (Elsevier France-Editions Scientifiques Medicales Elsevier, 2016)Hydrazones and the piperidine ring containing compounds were considered as beneficial substrates in drug design. Therefore, this study was aimed at the synthesis of new benzoyl hydrazones derived from ethyl 4-oxopiperidi ... -
Non-alkaloid cholinesterase inhibitory compounds from natural sources
Tamfu, Alfred Ngenge; Küçükaydın, Selçuk; Yeskaliyeva, Balakyz; Öztürk, Mehmet; Dinica, Rodica Mihaela (MDPI, 2021)Alzheimer’s disease (AD) is a severe neurodegenerative disorder of different brain regions accompanied by distresses and affecting more than 25 million people in the world. This progressive brain deterioration affects the ... -
Novel fluorine-containing chiral hydrazide-hydrazones: Design, synthesis, structural elucidation, antioxidant and anticholinesterase activity, and in silico studies
Sıcak, Yusuf; Oruç-Emre, Emine Elçin; Öztürk, Mehmet; Taskın-Tok, Tuğba; Karaküçük-İyidoğan, Ayşegül (Wiley, 2019)In this study, a series of fluorine-containing chiral hydrazide-hydrazone derivatives [III-XII] from x29f; -cysteine ethyl ester hydrochloride was synthesized as new antioxidant and anticholinesterase agents. The antioxidant ... -
Phenolic compounds from Trifolium echinatum Bieb. and investigation of their tyrosinase inhibitory and antioxidant activities
Sabudak, Temine; Demirkiran, Ozlem; Öztürk, Mehmet; Topcu, Gulacti (Pergamon-Elsevier Science Ltd, 2013)Two bischromones, 3,3'-dimethoxy-2'-oxychromone (1), 3,3'-dihydroxy-2,2'-oxychromone (2) and a biflavone, 5,7,4',5 '',3''',4''''-hexahydroxy-3 ''-O-beta-glucosyl-3',7 ''-O-biflavone (3) have been isolated from whole plant ...