Yazar "Uysal, Ülkü Dilek" için Fen Fakültesi listeleme
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Bazı Flavonoidlerin Yarı-Deneysel Çalışması
Kurt, Gürkan; Uysal, Ülkü Dilek; Berber, Halil (2015)Bu çalışmada, altı flavonol-glikozit ve tautomerlerinin kararlılık, reaktivite, geometri, nükleofilisite, muhtemel H-bağları ve enerji gibi bazı teorik özellikleri MOPAC 2012 paket programı ile PM6 ve PM7 yarı deneysel ... -
Calculation of Acidity Constants of Azo Dyes Derived 4-(Phenyldiazenyl)Benzene-1,3-Diol By Dft Method
Berber, Halil; Uysal, Ülkü Dilek (2015)Bu çalışmada, 4-(phenyldiazenyl) benzene-1,3-diolden türetilmiş altı azo boyar maddenin asitlik sabitleri Gaussian09 [1] program (B3LYP/6-311++G(d,p)) (DFT metodu) ile hesaplanmıştır.[2]. Elde edilen teorik veriler deneysel ... -
Determination of DNA in Certain Salvia Species by Capillary Gel Electrophoresis
Öncü-Kaya, Elif Mine; Uysal, Ülkü Dilek; Öztürk, Nilgün; Cenkci, Süleyman; Tunçel, Muzaffer (Taylor & Francis Inc, 2015)This article presents a newly developed capillary gel electrophoresis (CGE) using dynamic coating with hydroxyethylcellulose methodology for the separation of fourteen standard DNA fragments and determination of RAPD-PCR ... -
Determination of naproxen in tablets by using first derivative potentiometry
Uysal, Ülkü Dilek; Tunçel, Muzaffer (2004)Bu çalışmada, naproksen sodyumun potansiyometrik tayini tanıtılmaktadır. Naproksenin tayini için en iyi çözücü sistemi, sodyum klorür ilavesiyle 0,1 iyonik şiddete ayarlı % 20 etanol (h/h) olarak bulundu. Aktif maddenin ... -
Determination of parabens in pharmaceutical and cosmetic products by capillary electrophoresis
Uysal, Ülkü Dilek; Güray, T. (Maik Nauka/Interperiodica/Springer, 2008)A validated capillary electrophoresis method for the determination of parabens-methyl, ethyl, propyl, and butyl is described. The optimum results were obtained by the use of a run buffer containing 20 mM borate buffer (pH ... -
HPLC fluorescence determination of ochratoxin A utilizing a double internal standard and its application to poultry feed
Abstract: A validated liquid chromatography method employing a fluorescence detector for the determination of ochratoxin A (OTA) was developed with double internal standard and it was applied to ten different poultry feeds. ... -
HPLC fluorescence determination of ochratoxin A utilizing a double internal standard and its application to poultry feed
Tunçel, Muzaffer; Öncü Kaya, Elif Mine; Uysal, Ülkü Dilek; Güray, Tufan (Scientific Technical Research Council Turkey-Tubitak, 2015)A validated liquid chromatography method employing a fluorescence detector for the determination of ochratoxin A (OTA) was developed with double internal standard and it was applied to ten different poultry feeds. The ... -
Rapid direct spectrophotometric determination of zirconium(IV) in alloys with 2,2 ',3,4-tetrahydroxy-3 '-sulpho-5 '-carboxyazobenzene reagent
Uysal, Ülkü Dilek; Hüseyinli, A. Ali; Güray, Tufan (Natl Inst Science Communication-Niscair, 2011)In this study, 2, 2, 3, 4-tetrahydroxy-3'-sulpho-5'-carboxyazobenzene (tetrahydroxyazon SC) has been synthesized for the first time and used for direct spectrophotometric determination of zirconium(IV). Tetrahydroxyazon ... -
Rapid direct spectrophotometric determination of zirconium(IV) in alloys with 2,2/,3,4-tetrahydroxy-3/-sulpho-5/-carboxyazobenzene reagent
In this study, 2, 2', 3, 4-tetrahydroxy-3'-sulpho-5'-carboxyazobenzene (tetrahydroxyazon SC) has been synthesized for the first time and used for direct spectrophotometric determination of zirconium(IV). Tetrahydroxyazon ... -
A Semi-Empirical and Density Functional Theory Study of 2,2 ',3,4-Tetrahydroxy-3 '-sulpho Azobenzene Derivatives and Their Zirconium Complexes
Uysal, Ülkü Dilek (Asian Journal Of Chemistry, 2013)In this study, certain theoretical properties of three tetrahydroxyazo derivatives and their zirconium complexes, such as stability, reactivity, geometry and energy have been calculated by MOPAC2009 with the PM6 method and ... -
A semi-empirical and density functional theory study of 2,2',3,4-tetrahydroxy-3'-sulpho azobenzene derivatives and their zirconium complexes
Uysal, Ülkü Dilek (2013)In this study, certain theoretical properties of three tetrahydroxyazo derivatives and their zirconium complexes, such as stability, reactivity, geometry and energy have been calculated by MOPAC2009 with the PM6 method and ... -
Separation of catechins and methylxanthines in tea samples by capillary electrochromatography
Uysal, Ülkü Dilek; Aturki, Z.; Raggi, M. A.; Fanall, S. (2009)In this paper, the simultaneous separation of several polyphenols such as (+)-catechin, (-)-epicatechin, (-)-epigallocatechin, theophylline, caffeine in green and black teas by capillary electrochromatography (CEC) was ... -
Time and temperature dependent microbiological and mycotoxin (ochratoxin-A) levels in boza
Uysal, Ülkü Dilek; Öncü Kaya, Elif Mine; Berikten, Derya; Yılmaz, Neşe; Tuncel, Necati Barış; Kıvanç, Merih; Tuncel, Muzzaffer (Elsevier Science BV, 2009)This study describes the examination of microbiological tests and the determination of OTA in boza temperature and time dependently. Prior to the analysis, physicochemical properties of the boza samples such as moisture, ... -
A validated capillary electrophoretic method for the determination of indacaterol and its application to a pharmaceutical preparation
Güray, Tufan; Tunçel, Muzaffer; Uysal, Ülkü Dilek (Food & Drug Adminstration, 2018)Indacaterol is a new inhaled ultra-long acting beta(2)-agonist. It has been recently approved in the European Union for the treatment of chronic obstructive pulmonary disease. This paper reports, for the first time, a ... -
A Validated Capillary Electrophoretic Method for the Determination of Olopatadine and Its Application to a Pharmaceutical Preparation of Eye Drops
Güray, Tufan; Turan, Tuğba; Tunçel, Muzaffer; Uysal, Ülkü Dilek (Aoac Int, 2017)A validated rapid and sensitive capillary zone electrophoretic method for the determination of olopatadine hydrochloride (OLO) is described. Optimum conditions were found: 20 mmol/L sodium tetraborate buffer, acetonitrile ...