Yazar "Öztürk, Mehmet" için listeleme
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Antioxidant and Tyrosinase Inhibitory Activities of Flavonoids from Trifolium nigrescens Subsp petrisavi
Demirkiran, Ozlem; Sabudak, Temine; Öztürk, Mehmet; Topcu, Gulacti (Amer Chemical Soc, 2013)Trifolium nigrescens was researched for its chemical constituents for the first time. Bioassay-guided isolation of the EtOAc extract from the leaves of T. nigrescens resulted in the purification of a new biflavone, 4"',5,5 ... -
Antioxidant Diterpenoids from the Roots of Salvia barrelieri
Kolak, Ufuk; Kabouche, Ahmed; Öztürk, Mehmet; Kabouche, Zahia; Topçu, Gülaçtı; Ulubelen, Ayhan (John Wiley & Sons Ltd, 2009)Introduction - The phytochemical and biological studies carried out on Salvia species showed that their extracts and constituents have various biological activities. Objective - The aim of this study was the isolation of ... -
Antioxidant, anticholinesterase activities and polyphenolic constituents of cones of algerian fir (Abies numidica) by LC-ESI-MS/MS with chemometric approach
Mokaddem-Daroui, Habiba; Mostefa, Maya Belhadj; Aydoğmuş Öztürk, Fatma; Erol, Ebru; Öztürk, Mehmet; Ertaş, Abdulselam; Duru, Mehmet Emin; Kabouche, Ahmed; Kabouche, Zahia (Marmara Üniversitesi, 2021)The fractions (Fr.1-5) of the hydromethanolic extract of Abies numidica cones were studied for their polyphenol constituents, antioxidant, and anticholinesterase activities. The beta-carotene-linoleic acid, cupric reducing ... -
Antioxidant, anticholinesterase and antibacterial activities of Stachys guyoniana and Mentha aquatica
Ferhat, Maria; Erol, Ebru; Beladjila, Khadidja Aya; Çetintaş, Yunus; Duru, Mehmet Emin; Öztürk, Mehmet; Kabouche, Zahia (Taylor & Francis Ltd, 2017)Context: Stachys guyoniana Noe ex. Batt. and Mentha aquatica L. are two Algerian Lamiaceae used in folk medicine. Objective: To investigate their antioxidant, anticholinesterase and antibacterial activities. Material and ... -
Antioxidant, anticholinesterase and antimicrobial constituents from the essential oil and ethanol extract of Salvia potentillifolia
Kıvrak, İbrahim; Duru, Mehmet Emin; Öztürk, Mehmet; Mercan, Nazime; Harmandar, Mansur; Topçu, Gülaçtı (Elsevier Sci Ltd, 2009)The essential oil of Salvia potentillifolia was analysed by GC and GC-MS. Totally, 123 components were detected in both hydrodistilled and steam-distilled oils, alpha- and beta-pinenes being major compounds. The antioxidant ... -
Antioxidant, anticholinesterase and tyrosinase inhibition activities, and fatty acids of Crocus mathewii - A forgotten endemic angiosperm of Turkey
Yıldıztekin, Fatma; Nadeem, Said; Erol, Ebru; Yıldıztekin, Mahmut; Tuna, Atilla L.; Öztürk, Mehmet (Taylor & Francis Ltd, 2016)Context We report the first ever chemical/biochemical study on Crocus mathewii Kerndorff (Iridaceae) - a Turkish endemic angiosperm. This plant has never been explored for its phytochemistry and bioactivities.Objective ... -
Application of Box-Behnken design for modeling of lead adsorption onto unmodified and NaCl-modified zeolite NaA obtained from biosilica
Terzioğlu, Pınar; Yücel, Sevil; Öztürk, Mehmet (Iwa Publishing, 2017)The main objective of the present study was to optimize lead adsorption onto zeolite NaA. For this purpose, to synthesize zeolite NaA under hydrothermal conditions, local wheat husk was precleaned with chemical treatment ... -
Application of GC, GC-MSD, ICP-MS and Spectrophotometric Methods for the Determination of Chemical Composition and In Vitro Bioactivities of Chroogomphus rutilus: The Edible Mushroom Species
Çayan, Fatih; Tel-Çayan, Gülsen; Duru, Mehmet Emin; Öztürk, Mehmet; Türkoğlu, Aziz; Harmandar, Mansur (Springer, 2014)Chemical composition of Chroogomphus rutilus, the edible mushroom species, was analyzed by using gas chromatography (GC), gas chromatography mass spectrometry (GC-MSD) and inductively coupled plasma mass spectrometry ... -
Assessment of in vitro activities and chemical profiling of Senecio hoggariensis growing in Algerian Sahara
Arab, Yasmine; Şahin, Bihter; Ceylan, Özgür; Zellagui, Amar; Ölmez Tokul, Özge; Küçükaydın, Selçuk; Tamfu, Alfred Ngenge; Gherraf, Noureddine; Öztürk, Mehmet (Society for Indonesian Biodiversity, 2022)The in vitro antioxidant, anticholinesterase, tyrosinase inhibitory, antibiofilm, and anti-quorum sensing activities of the ethyl acetate extract of Senecio hoggariensis, growing in Algerian Sahara, were studied along with ... -
Assessment of physicochemical parameters, bioactive compounds, biological activities, and nutritional value of the most two commercialized pollen types of date palm (Phoenix dactylifera L.) in Morocco
Salhi, Saad; Chentouf, Mouad; Harrak, Hasnaâ; Öztürk, Mehmet; Çam, Dilaycan; Çakır, Cansel (SAGE Publications Inc., 2023)The pollen of date palm (Phoenix dactylifera L.) is known for its nutritional value and implications as a health-promoting component. Due to its low cost, date palm pollen crushed with its spadix is more widely commercialized ... -
Bazı Lactarius Türlerinin Yağ Asidi Bileşenlerinin ve Makrobesinsel Özelliklerinin Belirlenmesi
İnsanoğlu mantarları aroma ve lezzetlerinden dolayı yüzyıllardır besin olarak tüketmektedir. Çalışmamızda, yine ilgi çekici ve yenilebilir mantarların sınıfında olan Lactarius deliciosus (L.) Gray, Lactarius deterrimus ... -
Bioactive molecules from Algerian propolis with therapeutic potential against the oral pathogen Enterococcus faecalis and Chromobacterium violaceum CV026
Mokrani, Meryem; Zellagui, Amar; Hadjab, Widad; Öztürk, Mehmet; Ceylen, Özgür; Bensouici, Chawki (SciCell s.r.o., 2023)This research aims to analyse the richness of propolis ethanolic extract from Kherrata (EEPKh) in phenolic and flavonoid compounds and its antioxidant effects using different methods. Further investigations were conducted ... -
Bioactivities and phenolic constituents relationship of Muğla thyme and pine honey of Turkey with the chemometric approach
Sıcak, Yusuf; Şahin Yağlıoğlu, Ayşe; Öztürk, Mehmet (Springer, 2021)The chemical ingredients of pine and thyme honey were studied, along with their medicinal activity properties. A method was validated for common honey compounds using LC-TOF/MS to analyze the ingredients. In vitro ... -
Biologically active flavonoids from Dodonaea viscosa and their structure-activity relationships
Muhammad, Akhtar; Tel-Çayan, Gülsen; Öztürk, Mehmet; Nadeem, Said; Duru, Mehmet Emin; Anis, Itrat; Shah, Muhammad R. (Elsevier, 2015)Antioxidant and anticholinesterase activities of twelve flavonoids i.e. santin (1), penduletin (2), viscosine (3), 6,7-dimethylkaempferol (4), kaempferol-3- methylether (5), 3,4'-dimethoxy-5,7-dihydroxyflavone (6), ... -
Chalcones bearing nitrogen-containing heterocyclics as multi-targeted inhibitors: Design, synthesis, biological evaluation and molecular docking studies
Sıcak, Yusuf; Kekeçmuhammed, Hüseyin; Karaküçük-İyidoğan, Ayşegül; Taşkın-Tok, Tuğba; Oruç-Emre, Emine Elçin; Öztürk, Mehmet (John Wiley and Sons Ltd, 2023)In this work, a series of chalcones (1a–d, 2a–d, 3a–d, 4a–d, and 5a–d) were designed and synthesized by Claisen–Schmidt condensation. Also, their chemical structures were elucidated using UV–Vis, FT IR, 1H NMR, 13C NMR, ... -
Characterization of the Chemical Profile of Euphorbia Species from Turkey by Gas Chromatography-Mass Spectrometry (GC-MS), Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS), and Liquid Chromatography-Ion Trap-Time-of-Flight-Mass Spectrometry (LC-IT-TOF-MS) and Chemometric Analysis
Yener, İsmail; Ertaş, Abdülselam; Yılmaz, Mustafa Abdullah; Ölmez, Özge Tokul; Yılmaz, Pelin Köseoğlu; Yeşil, Yeter; Topcu, Gülactı; Öztürk, Mehmet (Taylor & Francis Inc, 2019)The Euphorbiaceae family comprises of about 300 genera and 5000 species primarily distributed in America and tropical Africa. The Euphorbia genus is represented by 105 species and locally named as "Sutlegen" and "Xasil" ... -
Characterization of Turkish Astragalus honeys according to their phenolic profiles and biological activities with a chemometric approach
Küçükaydın, Selçuk; Tel-Çayan, Gülsen; Çayan, Fatih; Taş-Küçükaydın, Meltem; Eroğlu, Büşra; Duru, Mehmet Emin; Öztürk, Mehmet (Elsevier Ltd, 2023)The genus of Astragalus provides a significant source of pollen and nectar for honeybees. In this study, 37 Astragalus honey samples in 8 different regions from Turkey were investigated for the phenolic compositions and ... -
Chemical characterization and nutritional value of Spirulina platensis cultivated in natural conditions of Chichaoua region (Morocco)
Rahim, Abdellatif; Çakır, Cansel; Öztürk, Mehmet; Şahin, Bihter; Soulaimani, Aziz; Sibaoueih, Mounia; Nasser, Boubker; Eddoha, Rabiaa; Essamadi, Abdelkhalid; El Amiri, Bouchra (Elsevier B.V., 2021)The aim of the current study was to characterize the phytochemical, phytopigments, and nutritional value of Spirulina platensis produced in Chichoua region of Morocco. A natural medium based on well water-wood ash is used ... -
Chemical Composition and Antioxidant Activity of Essential Oil from Daucus reboudii Coss., an Endemic Plant of Algeria
Smaili, Tahar; Bendif, Hamdi; Öztürk, Mehmet; Flamini, Guido; Peron, Gregorio (MDPI AG, 2021)Plants of the Daucus genus (Apiaceae) are used worldwide as traditional medicines or culinary ingredients. In this work, in order to explore a new chemotype, the essential oil obtained from the aerial parts of Daucus ... -
Chemical composition and insecticidal activities of the essential oils and various extracts of two Thymus species: Thymus cariensis and Thymus cilicicus
Kucukaydin, Selcuk; Tel-Cayan, Gulsen; Duru, Mehmet Emin; Kesdek, Memis; Öztürk, Mehmet (Taylor & Francis Inc, 2020)In this study, the essential oils and extracts of two Thymus species were investigated for insecticidal potentials against three insect species. The essential oil of T. cariensis showed insecticidal activity causing 56.7 ...