Yazar "Usta, Asu" için FEF, Biyoloji Bölümü Koleksiyonu listeleme
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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 ... -
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) ... -
Natural infection potential and efficacy of the entomopathogenic fungus Beauveria bassiana against Orosanga japonica (Melichar)
Akıner, Muhammet Mustafa; Öztürk, Murat; Güney, İbrahim; Usta, Asu (Springer, 2020)In this study, potential of the entomopathogenic fungi (EPF) isolates from dead samples of Orosanga japonica (Melichar) (Hemiptera: Ricaniidae) was evaluated. Infected specimens with fungi results confirmed that the samples ... -
Synthesis and antimicrobial properties of N-substituted derivatives of (E)-2 ',3 ''-thiazachalcones
Usta, Asu; Taşkıran, Hacer (Walter de Gruyter Gmbh, 2015)N-alkyl substituted 2',3 ''-thiazachalcones {3-[(1E)-3-(4-methylthiophene-2-yl)-3-oxoprop-1-en-1-yl]-1-alkyl (C-5-12,C-14) pyridinium bromides} were synthesized by a two-step reaction. the newly synthesized compounds were ... -
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, antibacterial and antioxidant activities of some new nsubstituted azachalcone, schiff base and pyrazole derivatives
Çalışkan, Nedime; Usta, Asu; Beriş, Fatih Şaban; Baltaş, Nimet; Çelik, Efsun (Bentham Science Publ Ltd, 2020)Pyrazoles, Schiff bases and the quaternary ammonium compounds (QAC) such as N-alkyl substituted azachalcones are the important group of chemical individuals with widespread usage in many fields of science. in particular, ... -
Synthesis, Configuration, and Antimicrobial Properties of Novel Substituted and Cyclized ‘2′,3″-Thiazachalcones’
Usta, Asu; Yaşar, Ahmet; Yılmaz, Nagihan; Güleç, Canan; Yaylı, Nuran; Karaoğlu, Şengül Alpay; Yaylı, Nurettin (Wiley, 2007)Nine new thiazachalcone-based drugs, compounds 1-9, were prepared and fully characterized. The configurations of the photochemical-dimerization products 7-9 were rationalized by semi-empirical calculations. Both the ... -
Toxic efficacy of Cuscuta campestris Yunck. (Solanales: Convolvulaceae) and Lupinus albus L. (Fabales: Fabaceae) plant crude extracts against nymphs and adults of Orosanga japonica (Melichar, 1898) (Hemiptera: Ricaniidae) under laboratory conditions
Akıner, Muhammet Mustafa; Kılıçkaya Selvi, Emine; Öztürk, Murat; Güney, İbrahim; Usta, Asu (Entomological Society of Turkey, 2021)The planthopper, Orosanga japonica (Melichar, 1898) (Hemiptera: Ricaniidae), is an important agricultural pest of grapevine, kiwifruit and tea in Asia and in some countries of Eastern Europe. The efficacy of the crude ... -
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. ...