Yazar "RTEÜ, Fen - Edebiyat Fakültesi, Kimya Bölümü" için FEF, Biyoloji Bölümü Koleksiyonu listeleme
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Anthocyanins profiling of Thymus praecox opiz subsp caucasicus var. caucasicus
Turumtay, Emine Akyüz; Turumtay, Halbay; Demir, Adem; Selvi, Emine Kılıçkaya; Yazıcı, Emre; Sandallı, Cemal; Yazıcı, Zihni Açar (Elsevier Science Bv, 2015)Thymus praecox Opiz subsp. caucasicus var. caucasicus (Anzer tea) was studied to determine its anthocyanin content; anthocyanin stability in response to acidic hydrolysis and temperature changes. in this study, anthocyanin ... -
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 ... -
Design, synthesis, and biological evaluation of coumarin-triazole hybrid molecules as potential antitumor and pancreatic lipase agents
Kahveci, Bahittin; Yılmaz, Fatih; Menteşe, Emre; Ülker, Serdar (Wiley-V C H Verlag Gmbh, 2017)The design, synthesis, and investigation of antitumor and anti-lipase activities of some coumarin-triazole hybrid molecules are reported. the synthesis of these hybrid molecules was performed under microwave irradiation ... -
Developing effective antimicrobial agents: synthesis and molecular docking study of ciprofloxacin-benzimidazole hybrids
Menteşe, Emre; Yılmaz, Fatih; Menteşe, Meltem; Beriş, Fatih Şaban; Emirik, Mustafa (Wiley, 2024)In this study, we designed and synthesized some new ciprofloxacin-benzimidazole hybrid compounds and evaluated them for their antimicrobial activity against four Gram-positive (B. subtilis, B. megaterium, E. faecalis and ... -
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 microwave irradiation on the synthesis of 1,2,4-triazol-3-one derivatives and their antimicrobial activities
Kahveci, Bahittin; Yılmaz, Fatih; Menteşe, Emre; Beriş, Fatih Şaban (Science Reviews 2000 Ltd, 2012)An easy efficient method for the synthesis of N-(3,5-dichlorophenyl)-5-alkyl/aryl-3H-1,2,4-triazol-3-one derivatives under microwave irradiation has been developed using the reaction of 3,5-dichloroaniline and ethoxycarb ... -
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. ... -
An efficient synthesis of benzimidazoles via a microwave technique and evaluation of their biological activities
Kahveci, Bahittin; Menteşe, Emre; Özil, Musa; Ülker, Serdar; Ertürk, Murat (Springer Wien, 2013)A simple and practical protocol was developed for the synthesis of benzimidazoles. the protocol uses iminoester hydrochloride which is very useful in the reaction with 4,5-dichloro-1,2-phenylenediamine under microwave ... -
Elucidation of Bioactive compounds in flower extracts of Camellia sinensis by HPLC-DAD-MS/MS and their inhibitory effects on replicative bacterial DNA polymerases
Turumtay, Halbay; Tombuloğlu, Hüseyin; Er, Havva; Sandallı, Cemal; Turumtay, Emine Akyüz (Elsevier, 2022)Camellia sinensis L. (C. sinensis) is an economically valuable crop whose leaves are used to produce tea. Tea flowers extracts (TFE) have been tested for their DNA polymerase inhibitory effect experimentally and in silico. ... -
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, ... -
Microwave assisted synthesis and anti-lipase activity of some new fluorine-containing benzimidazoles
Menteşe, Emre; Yılmaz, Fatih; Ülker, Serdar; Kahveci, Bahittin (Georg Thieme Verlag Kg, 2015)In this study, a new series of fluorine containing benzimidazoles (4a-l) and bisbenzimidazoles (6a-c, 8) were synthesized by the reaction of o-phenylenediamines with iminoester hydrochlorides (3a-l, 7) in methanol under ... -
Microwave assisted synthesis of some novel 2-(3-Chlorobenzyl)-1H-benzimidazole derivatives and determination of their antimicrobial activity and pKa values
Menteşe, Emre; Bekircan, Olcay; İslamoğlu, Fatih; Beriş, Fatih Şaban (Chiminform Data S A, 2015)In the present research, synthesis of new 2-(3-chlorobenzyl)-1H-benzimidazole derivatives bearing N-benzylidene, 1,2,4-triazole and N-acylhydrazone moiety is investigated. These novel compounds have been tested for their ... -
Microwave-assisted preparation of azachalcones and their N-alkyl derivatives with antimicrobial activities
Usta, Asu; Öztürk, Elif; Beriş, Fatih Şaban (Taylor & Francis Ltd, 2014)Two new azachalcones were prepared by both Claisen-Schmidt condensation and a simple environmentally trendy microwave-assisted method. Ten new N-alkyl (C-6,C-8,C-10,C-12,C-14)-substituted azachalconium bromides (3a-e, 4a-e) ... -
Microwave-assisted synthesis and biological evaluation of some benzimidazole derivatives containing a 1,2,4-triazol ring
Menteşe, Emre; Karaali, Nesrin; Yılmaz, Fatih; Ülker, Serdar; Kahveci, Bahittin (Wiley-V C H Verlag Gmbh, 2013)A new series of 2-(4-(trifluoromethyl)phenyl)-1H-benzo[d]imidazole derivatives containing a 1,2,4-triazole ring were synthesized via microwave technique. This efficient procedure provides pure products within a few minutes. ... -
Microwave-assisted synthesis of new benzimidazole derivatives with lipase inhibition activity
Menteşe, Emre; Bektaş, Hakan; Ülker, Serdar; Bekircan, Olcay; Kahveci, Bahittin (Taylor & Francis Ltd, 2014)A practical protocol has been used for the synthesis of benzimidazoles. the reaction of iminoester hydrochlorides of phenylacetic with 4,5-dichloro-1,2-phenylenediamine under microwave irradiation leads to the benzimidazole ... -
Microwave-assisted synthesis of some hybrid molecules containing penicillanic acid or cephalosporanic acid moieties and investigation of their biological activities
Başoğlu, Serap; Ülker, Serdar; Alpay-Karaoğlu, Şengül; Demirbaş, Neslihan (Springer Birkhauser, 2014)Ethyl 4-amino-2-fluorophenylpiperazin-1-carboxylates containing a 1,3-oxazol(idin)e, 5-thioxo-1,2,4-triazole, 1,3,4-thiadiazole, 5-thioxo-1,3,4-oxadiazole, or 1,3-thiazole nucleus were obtained starting from ethyl ... -
Microwave-assisted synthesis of some new benzimidazole derivatives with their antimicrobial activity
Menteşe, Emre; Yılmaz, Fatih; Beriş, Fatih Şaban; Bekircan, Olcay; Kahveci, Bahittin (Bentham Science Publ Ltd, 2015)2-(2-Chlorobenzyl)-1H-benzimidazole (2) was prepared from the reaction of o-phenylenediamine and ethylimido-o-chlorophenylacetate hydrochloride (1) under microwave irradiation. the acetate and hydrazide derivatives of 2(2- ... -
Microwave-assisted synthesis of some new coumarin derivatives including 1,2,4-triazol-3-one and investigation of their biological activities
Kahveci, Bahittin; Yılmaz, Fatih; Menteşe, Emre; Ülker, Serdar (Springer, 2015)By using the microwave technology, a new protocol has been developed for the synthesis of new coumarin derivatives including 1,2,4-triazol-3-one skeleton. This protocol proves to be efficient and environmentally friendly ...