Yazar "Anık, Ülkü" için listeleme
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alpha-glucosidase based bismuth film electrode for inhibitor detection
Timur, Suna; Anık, Ülkü (Elsevier, 2007)A biosensing system based on (alpha-glucosidase (AG) activity was developed by using bismuth film modified glassy carbon electrode (BiFE). AG enzyme was immobilized on the BiFE by means of gelatin membrane and the activity ... -
Amino acid intercalated montmorillonite: electrochemical biosensing applications
Demir, Filiz; Demir, Bilal; Yalçınkaya, Esra E.; Çevik, Serdar; Demirkol, Dilek Odacı; Anık, Ülkü; Timur, Suna (Royal Soc Chemistry, 2014)The present work is the first that includes the use of glycine (Gly), lysine (Lys) and glutamic acid (Glu) modified clay mineral matrices in the biosensors. For this purpose, initially, Gly, Lys and Glu were intercalated ... -
Application of Bismuth(III)-Entrapped XO Biosensing System for Xanthine Determination in Beverages
Anık, Ülkü; Cubukcu, Meliha (Springer, 2012)A xanthine biosensor was prepared by electrochemical immobilization of xanthine oxidize enzyme onto carbon paste electrode via entrapment of Bi3+. After the optimization of experimental parameters, analytical characteristics ... -
Application of Centri-voltammetry to Cytosensors: Cyto-centrivoltammetry
Tepeli, Yudum; Barlas, Fırat Barış; Timur, Suna; Anık, Ülkü (Pergamon-Elsevier Science Ltd, 2016)In this work, a centri-voltammetric cytosensor suitable for the for detection of folate receptor positive cervical cancer (HeLa) cells was developed for the first time. In order to see the effect of centrifugation, developed ... -
Ascorbic Acid Detection with MnO2-Modified GCPE
Cevik, Serdar; Akpolat, Oguz; Anık, Ülkü (Springer, 2016)In this study, manganese(IV) oxide (MnO2) nanoparticle (np)-modified glassy carbon paste electrode is used for ascorbic acid (AA) detection in fruit juice samples. The experimental parameters like MnO2 np amount and pH ... -
Banana Tissue-Nanoparticle/Nanotube Based Glassy Carbon Paste Electrode Biosensors for Catechol Detection
Cevik, Serdar; Anık, Ülkü (Amer Scientific Publishers, 2010)In this work, glassy carbon paste electrode (GCPE) was modified with banana tissue and nanomaterials like gold nanoparticles (Au-nps) and HNO(3) treated multi-walled carbon nanotubes (MWCNTs). As a result three types of ... -
Biocentri-voltammetric biosensor for acetylcholine and choline
Cevik, Serdar; Timur, Suna; Anık, Ülkü (Springer Wien, 2012)We report on the determination of choline and acetylcholine via biocentrivoltammetry. This method combines centrifugation and voltammetry and is based on a carbon paste electrode modified with acetylcholinesterase and ... -
Biocentri-voltammetry for the enzyme assay: a model study
Çevik, Serdar; Timur, Suna; Anık, Ülkü (Royal Soc Chemistry, 2012)This work constitutes the first biocentri-voltammetric application for acetylcholinesterase (AChE) activity assay. After the optimization of working conditions like reaction time, centrifugation speed and time and enzyme ... -
A biochar-modified carbon paste electrode
Bal Altuntaş, Derya; Akgül, Gökçen; Yanık, Jale; Anık, Ülkü (Scientific Technical Research Council Turkey-Tubitak, 2017)The present work examined the use of biochar derived from tea waste as a novel electrode material. For the fabrication of the biochar electrode, suitable amounts of biochar and graphite were mixed with mineral oil for the ... -
A biosensor based on graphite epoxy composite electrode for aspartame and ethanol detection
Anık, Ülkü; Odacı, Dilek; Timur, Suna; Merkoci, Arben; Alegret, Salvador; Besun, Nurgun; Telefoncu, Azmi (Elsevier Science Bv, 2006)A gelatin membrane with carboxyl esterase and alcohol oxidase was subsequently integrated onto the surface of a graphite epoxy composite electrode (GECE). The developed biosensors showed linearity in the range of 2.5-400 ... -
Bismuth film based electrochemical hydroxymethylfurfural sensor
Özyurt, Vasfiye Hazal; Avcı, Okan; Tepeli-Büyüksünetci, Yudum; Anık, Ülkü (SPRINGER, 2023)A simple and sensitive electrochemical sensor based on bismuth film that was coated onto a carbon paste electrode was prepared and used for hydroxymethylfurfural (HMF) detection. It was observed that bismuth film electrode ... -
Bismuth Film Combined with Screen-Printed Electrode as Biosensing Platform for Phenol Detection
Merkoci, Arben; Anık, Ülkü; Cevik, Serdar; Cubukcu, Meliha; Guix, Maria (Wiley-V C H Verlag Gmbh, 2010)Mushroom tissue was immobilized onto plain screen printed electrode (SPE) and multiwalled carbon nanotube (MWCNT) modified SPE (SPE/MWCNT) via bismuth (Bi) deposition. By this way. SPE/Bi/Tissue and SPE/MWCNT/Bi/Tissue ... -
Bismuth Film Electrode as Sensing Platform for IgE-anti-IgE Interactions
Anık, Ülkü; Cevik, Serdar; Timur, Suna (Wiley-V C H Verlag Gmbh, 2011)In this study, a bismuth film was used as a sensing platform for immunoreaction assay which includes the interactions between IgE and anti-IgE molecules. For preparing this assay, IgE was deposited on a carbon paste electrode ... -
Bismuth Nanoparticles Incorporated Centri-voltammetry for Phenol Detection
Oren, Tugba; Tepeli, Yudum; Anık, Ülkü (Wiley-V C H Verlag Gmbh, 2015)A novel approach has been developed for phenol detection by combining centri-voltammetry with bismuth nanoparticles that are used as carrier reagent. The interaction between bismuth and phenol and also the application of ... -
Carbon nanotube composite as novel platform for microbial biosensor
Anık, Ülkü; Timur, Suna; Odaci, Dilek; Perez, Briza; Alegret, Salvador; Merkoci, Arben (Wiley-V C H Verlag Gmbh, 2007)The presented work includes the development of a microbial biosensor based on a carbon-nanotube epoxy composite (CNTEC) platform used as supporting electrode for cell immobilization. For this purpose, cells of Pseudomonas ... -
Carboxylic acid functionalized multi-walled carbon nanotube assisted centri-voltammetry as a new approach for caffeine detection
Ören Varol, Tuğba; Anık, Ülkü (Royal Soc Chemistry, 2017)This study focuses on the applicability of centri-voltammetry by using carboxylic acid functionalized multi-walled carbon nanotubes (MWCNTs-COOH) as a carrier reagent for caffeine detection. The effects of experimental ... -
Centri-voltammetric detection of epinephrine
Bal Altuntaş, Derya; Ören, Tuğba; Anık, Ülkü (Royal Soc Chemistry, 2016)The present study demonstrates a novel approach that has been proposed for epinephrine detection by using centri-voltammetry. The principle of the method is based on the accumulation of an analyte, here epinephrine, onto ... -
Centri-voltammetric determination of glutathione
Cubukcu, Meliha; Ertas, Fatma Nil; Anık, Ülkü (Springer Wien, 2013)Centri-voltammetry is a method for concentrating an analyte on an electrode with the aid of a centrifuge. It can be performed in the presence or the absence of a solid carrier/support. This is followed by a voltammetric ... -
Centri-voltammetric dopamine detection
Sultan, Sinan Cemgil; Sezer, Esma; Tepeli, Yudum; Anık, Ülkü (Royal Soc Chemistry, 2014)Centri-voltammetry, which includes the combination of centrifugal forces and voltammetry, is a kind of new method. In this work, centri-voltammetry was applied for the detection of the very important biological molecule ... -
Centri-Voltammetric Folic Acid Detection
Buyuksunetci, Yudum Tepeli; Hakli, Ozgul; Anık, Ülkü (Wiley-V C H Verlag Gmbh, 2020)The need for practical detection of folic acid (FA) has been increased day by day. For this reason in this work, a two steps electroanalytical technique, centri-voltammetry was utilized for FA detection for the first time. ...
