Browsing FEF, Kimya Bölümü Koleksiyonu by Author "Karaoğlu, Şengül Alpay"
Now showing items 1-15 of 15
-
Chemical analysis and biological activity of the essential oils and extracts of two liverwort species growing in Turkey
Çelik, Gonca; Şahin, Hüseyin; Baltaş, Nimet; Batan, Nevzat; Karaoğlu, Şengül Alpay; Yaylı, Nurettin (University Belgrade, 2023)The aim of this study was to investigate the chemical composition of the essential oils (EOs) from two Diplophyllum species and to evaluate their bioactivity potential [antimicrobial, antioxidant, anti-urease, anti-xanthine ... -
Chemical composition and antimicrobial activity of essential oils from tortella inclinata var. Densa, T. Tortusa and pleurochaete squarrosa
Tosun, Gonca; Yaylı, Büşra; Özdemir, Turan; Batan, Nevzat; Yaylı, Nurettin; Karaoğlu, Şengül Alpay (Chemical Publishing Co., 2014)Although some chemical compositional data are available about the extracts of Tortella tortusa and Pleurochaete squarrosa, there is no investigation about the compositions and antimicrobial activities of the volatiles from ... -
Composition and antimicrobial activity of essential oil from the flower of Rhododendron luteum Sweet
Usta, Asu; Yaylı, Büşra; Kahrinman, Nuran; Karaoğlu, Şengül Alpay; Yaylı, Nurettin (Chemical Publishing Co., 2012)Essential oil from air-dried flower of Rhododendron luteum Sweet (Ericaceae), was obtained by hydrodistillation in a Clevenger-type apparatus and analyzed by GC-MS and GC-FID. Sixty-four components were identified in the ... -
Ecofriendly solventless synthesis and reduction reaction of some triazole compounds and evaluation of their antimicrobial activity
Özil, Musa; Menteşe, Emre; Karaoğlu, Şengül Alpay; Kahveci, Bahittin (Taylor & Francis Inc, 2013)A number of triazole-3-one compounds have been synthesized, and reduction of the carbonyl group in the molecule has been carried out to give a corresponding hydroxyl group that possesses asymmetric carbon atom in good ... -
Effect of propolis in gastric disorders: inhibition studies on the growth of Helicobacter pylori and production of its urease
Baltaş, Nimet; Karaoğlu, Şengül Alpay; Tarakcı, Cemre; Kolaylı, Sevgi (Taylor & Francis Ltd, 2016)There is considerable interest in alternative approaches to inhibit Helicobacter pylori (H. pylori) and thus treat many stomach diseases. Propolis is a pharmaceutical mixture containing many natural bioactive substances. ... -
Essential oil analysis and antimicrobial activity of neckera complanata (Hedw.) huebener and neckera crispa Hedw. (Neckeraceae) grown in Turkey
Cansu, Tayyibe Beyza; Özdemir, Turan; Batan, Nevzat; Yaylı, Büşra; Karaoğlu, Şengül Alpay; Yaylı, Nurettin (Chemical Publishing Co., 2014)In this work, the essential oils obtained by hydrodistillation from Neckera complanata (Hedw.) Huebener and Neckera crispa Hedw (Neckeraceae) were analyzed by GC-FID and GC-MS. Twenty-one compounds in the oil of N. complanata, ... -
Isolation, production, and characterization of an extracellular lipase from Trichoderma harzianum isolated from soil
Bu çalışma, Trichoderma harzianum lipazının karakterizasyonu hakkında ilk rapordur. Yeni bir suş olan Trichoderma harzianum IDM14D topraktan izole edildi. İzole edilen bu suş, lipaz üretimi için çalkalamalı kültürde 30 ... -
Microwave-assisted synthesis of some novel benzimidazole derivatives containing imine function and evaluation of their antimicrobial activity
Kahveci, Bahittin; Yılmaz, Fatih; Menteşe, Emre; Özil, Musa; Karaoğlu, Şengül Alpay (Wiley, 2014)4-Bromo-o-phenylenediamine and ethylimido-p-bromophenylacetate, 1, were subjected to microwave irradiation to synthesize benzimidazole derivative, compound 2. Ester derivative, 3, and hydrazide derivative, 4, of compound ... -
New potential monotherapeutic candidates for helicobacter pylori: Some pyridinazo compounds having both urease enzyme inhibition and anti-helicobacter pylori effectiveness
Kantar, Cihan; Baltaş, Nimet; Karaoğlu, Şengül Alpay; Şaşmaz, Selami (Springer, 2021)To contribute to the monotherapeutic approach to Helicobacter pylori, some new pyridinazo compounds containing natural phenols such as eugenol and guaiacol were synthesized and their antioxidant capacities, urease enzyme ... -
Rapid and efficient microwave-assisted synthesis of some new triazol-3-one derivatives
Menteşe, Emre; Özil, Musa; Karaoğlu, Şengül Alpay; Kahveci, Bahittin (Wiley, 2013)A growing body of literature has shown the effectiveness of using microwaves in chemical reactions. The aim of this study is to demonstrate a rapid and highly efficient synthesis of some new triazol-3-ones via microwave ... -
Some azo dyes containing eugenol and guaiacol, synthesis, antioxidant capacity, urease inhibitory properties and anti-helicobacter pylori activity
Kantar, Cihan; Baltaş, Nimet; Karaoğlu, Şengül Alpay; Şaşmaz, Selami (Editura Acad Romane, 2018)There are many studies about azo compounds at literature. However, antioxidant capacity, urease inhibitory and anti-Helicobacter pylori activity properties are not well known. Therefore, some azo dyes containing eugenol ... -
Some schiff bases containing eugenol and guaiacol: Comparison of urease inhibition and anti-helicobacter pylori activities with Its azo analogs
Kantar, Cihan; Baltaş, Nimet; Karaoğlu, Şengül Alpay; Şaşmaz, Selami (Springer, 2024)To improve and develop our monotherapeutic approach for Helicobacter pylori infection, some Schiff base compounds containing eugenol and guaiacol were synthesized and their antioxidant capacities, urease enzyme inhibition, ... -
Synthesis of methyl (E)-2′,4″-thiazachalcones and their N-alkyl derivatives, photochemistry with theoretical calculations and antimicrobial activities
Usta, Asu; Yaşar, Ahmet; Yaylı, Nuran; Karaoğlu, Şengül Alpay; Yaylı, Nurettin (TUBİTAK, 2009)A series of 9 new (E) -thiazachalcones (1-3), and their N -alkyl substituted derivatives (4-6), and stereoselective dimerization products (7-9) were synthesized, then tested for antimicrobial activity against all test ... -
Synthesis of novel symmetrical 1,4-disubstituted 1,2,3-bistriazole derivatives via 'click chemistry' and their biological evaluation
Düğdü, Esra; Unluer, Dilek; Çelik, Fatih; Sancak, Kemal; Karaoğlu, Şengül Alpay; Özel, Arzu (Mdpi, 2016)A series of symmetric bis-1,2,3-triazole compounds 2-5(a-f) were synthesized as potential antioxidant agents via click chemistry. Their structures were confirmed by H-1-NMR and C-13-NMR. All of the synthesized compounds ... -
Volatile constituents and antimicrobial activities from flower and fruit of arbutus unedo L.
Kahriman, Nuran; Albay, Canan Güleç; Doğan, Neşe; Usta, Asu; Karaoğlu, Şengül Alpay; Yaylı, Nurettin (2010)Essential oils isolated by hydrodistillation from flower and fruit of Arbutus unedo growing in Turkey were analyzed by GC and GC/MS. Forty-nine compounds, representing around 95% of the total oils were identified. ...