Yazar "Öztürk, Mehmet" için Kimya Bölümü Koleksiyonu listeleme
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Abietane diterpenoids as butyrylcholinesterase inhibitors from Salvia species
Topcu, G.; Akdemir, A.; Öztürk, Mehmet; Boga, M.; Kola, U. (Georg Thieme Verlag Kg, 2012)Salvia (sage) species have been used as medicinal plants since ancient times in the treatment of cold, sore throat, tuberculosis, angina pectoris, stomache ache, and menstrual disorders and they have been known as sedative, ... -
The Addition of Opuntia ficus-indica Ethanolic Extract to a Skimmed Milk-Based Extender Impacts Ram Sperm Quality
Allai, Larbi; Druart, Xavier; Terzioğlu, Pınar; Louanjli, Noureddine; Nasser, Boubker; Öztürk, Mehmet; El Amiri, Bouchara (PMC, 2023)Recently, researchers have focused on the use of natural antioxidants to improve semen quality as a key element for successful artificial insemination. In this context, the first aim of this study was to determine the ... -
Anatoluin A and B isolated from medicinal Tricholoma anatolicum are new cytotoxic ergostanoids against the most common cancers
Kaplaner, Erhan; Öztürk, Mehmet; Duru, Mehmet Emin; Aydoğmuş Öztürk, Fatma (Taylor and Francis Ltd., 2022)Tricholoma anatolicum is an edible mushroom from the matsutake group growing under Cedar trees. Bioactivity-guided fractionation of Tricholoma anatolicum afforded two new (1 and 2), three known ergosterols (3–6), and four ... -
Anticancer and apoptotic effects of a polysaccharide extract isolated from Lactarius chrysorrheus Fr. in HepG2 and PANC-1 cell lines
Mutlu, Doğukan; Çakır, Cansel; Öztürk, Mehmet; Arslan, Şevki (Institut za Bioloska Istrazivanja, 2023)Mushrooms are widely used in many cultures for nutritional and health benefits. The Lactarius species is found in the Aegean region of Turkey. Lactarius chrysorrheus Fr. is a wild mushroom that contains a milky juice. In ... -
Antioxidant abietane diterpenoids from Salvia barrelieri
Kabouche, Ahmed; Kabouche, Zahia; Öztürk, Mehmet; Kolak, Ufuk; Topçu, Gülaçtı (Elsevier Sci Ltd, 2007)The root extract of endemic Algerian Salvia species Salvia barrelieri Ettling and its diterpenoids were investigated for potential antioxidant activity. From its acetone extract, a new natural abietane diterpenoid ... -
Antioxidant activity of stem and root extracts of Rhubarb (Rheum ribes): An edible medicinal plant
Öztürk, Mehmet; Aydoğmuş-Öztürk, Fatma; Duru, Mehmet Emin; Topçu, Gülaçtı (Elsevier Sci Ltd, 2007)The antioxidant activity of chloroform and methanol extract of roots and stems of Rhubarb (Rheum ribes L.), which are used for medicinal purposes and also its fresh stems and petioles are consumed as vegetable, was studied. ... -
Antioxidant and anticholinesterase active constituents from Micromeria cilicica by radical-scavenging activity-guided fractionation
Öztürk, Mehmet; Kolak, Ufuk; Topçu, Gülaçtı; Öksüz, Sevil; Choudhary, M. Iqbal (Elsevier Sci Ltd, 2011)From the acetone extract of Micromeria cilicica, two new (1 and 2) and five known (3-7) compounds were obtained through radical-scavenging activity guided isolation. Structures of the compounds were identified as piperitone ... -
Antioxidant and Anticholinesterase Activity Evaluation of ent-Kaurane Diterpenoids from Sideritis arguta
Ertaş, Abdülselam; Öztürk, Mehmet; Boğa, Mehmet; Topçu, Gülaçtı (Amer Chemical Soc, 2009)The petroleum ether and acetone extracts of the aerial parts of Sideritis arguta afforded two new and six known diterpenoids with the ent-kaurane skeleton. The structures of the new diterpenoids were determined as ent-7 ... -
Antioxidant and anticholinesterase constituents of Salvia poculata
Kolak, Ufuk; Hacıbekiroğlu, Işıl; Öztürk, Mehmet; Özgökçe, Fevzi; Topçu, Gülaçtı; Ulubelen, Ayhan (Scientific Technical Research Council Turkey-Tubitak, 2009)Two triterpenoids, namely 2 alpha,3 alpha-dihydroxy-24-nor-4(23), 12-oleanadien-28-oic acid (1) and ursolic acid (2); 4. avonoids, namely 5-hydroxy-7,4'-dimethoxyflavone (3), cirsimaritin (4), eupatilin (5), and salvigenin ... -
Antioxidant and antidiabetic activities of hexane extract of Genista januensis var. lydia
Çakır, C.; Orak H.H.; Argon M.; Çalışkan H.; Öztürk, Mehmet (Bulgarska Akademiya na Naukite, 2022)The genus Genista L. (Fabaceae) has been of interest for human beings since ancient times with its cosmopolitan distribution. Since α-amylase and α-glucosidase are the chief enzymes of diabetes mellitus, this study aims ... -
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 ... -
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 ... -
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 ... -
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 ... -
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), ... -
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" ... -
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 ...