Browsing by Author "Durmus, ZEHRA"
Now showing items 1-20 of 48
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A Comparative Study on Magnetostructural Properties of Barium Hexaferrite Powders Prepared by Polyethylene Glycol
Durmus, ZEHRA (2014-01-01)Nanocrystalline particles of barium hexaferrite were synthesized by a sol-gel combustion route using nitrate-citrate gels prepared from metal nitrates and citric acid solutions with Fe/Ba molar ratio 12. The present paper ... -
A simple approach for the synthesis of Co3O4 nanocrystals
Ahmadov, T. O.; Durmus, ZEHRA; Baykal, A.; Kavas, H. (2011-04-01)By using Co2+ and Co3+ salts, and freshly extracted ovalbumin, Co3O4 nanocrystals have been synthesized successfully. The pH of the solution was self-regulated for the hydrolysis of metal ions as the ovalbumin-water mixture ... -
Chitosan and carboxymethyl cellulose based magnetic nanocomposites for application of peroxidase purification
Kurt, BELMA; Uckaya, FATİH; Durmus, ZEHRA (2017-03-01)Recently, protein purification methods have a very wide area of research. Many of these methods are both expensive and multi-stage methods, that are needed in specific equipment. In this study, biopolymer coated magnetic ... -
CTAB-Mn3O4 nanocomposites: Synthesis, NMR and low temperature EPR studies
Kavas, H.; Durmus, ZEHRA; Senel, M.; Kazan, S.; Baykal, A.; Toprak, M. S. (2010-03-30)We are reporting on the synthesis of Mn3O4 nanoparticles and CTAB-Mn3O4 nanocomposites via a sonochemical route using MnCl2, ethanol, NaOH and CTAB. The crystalline phase was identified as Mn3O4. The crystallite size of ... -
Determination of atorvastatin in human plasma by magnetic solid-phase extraction combined with HPLC and application to a pharmacokinetic study
Tekkeli, Serife Evrim Kepekci; Durmus, ZEHRA; Onal, Armagan (2016-01-01)A simple and sensitive analytical procedure by solid-phase extraction method combined with high-performance liquid chromatography and using of graphene-magnetite nanomaterials as sorbent has been developed for the determination ... -
Effect of conducting polymer layer on microwave absorption properties of BaFe12O19-TiO2 composite
Akman, O.; Durmus, ZEHRA; Kavas, H.; Aktas, B.; Kurtan, U.; Baykal, A.; SOZERI, H. (2013-02-01)Ba-hexaferrite (BaM) particles, synthesized by a sol-gel route, have been mixed with TiO2 powders with different mass ratios. The obtained BaM-TiO2 composites have been coated with a conducting polymer layer of polypyrrole ... -
Effect of Fuel on the Synthesis and Properties of Poly(methyl methacrylate) Modified SrFe12O19 Nanoparticles
Durmus, ZEHRA; SOZERI, H.; Toprak, M. S.; Baykal, A. (2012-08-01)Nanosized strontium hexaferrite (SrFe12O19) has been synthesized by citrate, urea, oxalic, and glycine precursor via a sol-gel route with poly(methyl methacrylate) (PMMA) as a templating agent. Crystal structure, morphology, ... -
Electrochemical biosensor based on REGO/Fe3O4 bionanocomposite interface for xanthine detection in fish sample
Dervisevic, Muamer; Custiuc, Esma; Cevik, Emre; Durmus, ZEHRA; Senel, Mehmet; Durmus, Ali (2015-11-01)In this study, xanthine molecules which can serve as an indicator of meat spoilage were determined using a novel and sensitive amperometric xanthine biosensor. Biosensor was developed by preparing a nanocomposite film that ... -
Electrochemical sensing platforms based on the different carbon derivative incorporated interface
Dervisevic, Muamer; Cevik, Emre; Durmus, ZEHRA; Senel, Mehmet (2016-01-01)In this work we present a comparative study of carbon derivative applications in amperometric biosensors and their effects on the properties of these biosensors. Biosensors were prepared by Horseradish peroxidase (HRP) ... -
Fabrication and characterization of dendrimer-encapsulated monometallic Co nanoparticles
Kavas, H.; Durmus, ZEHRA; Tanriverdi, E.; Senel, M.; SOZERI, H.; Baykal, A. (2011-04-28)A series of cobalt (Co) nanoparticles were synthesized by employing PAMAM dendrimers with different generations (G 0.0-3.0) as templates and sodium borohydride as a reducing agent. Extensive characterizations of the products ... -
Hydrothermal Synthesis of SrFe12O19 and Its Characterization
Baykal, A.; Toprak, M. S.; Durmus, ZEHRA; SOZERI, H. (2012-08-01)We have synthesized strontium hexaferrite particles in an alkaline medium using a hydrothermal process at 180 degrees C. Crystalline phase of samples were determined by XRD and spectroscopic, morphological, and magnetic ... -
L-Histidine coated iron oxide nanoparticles: Synthesis, structural and conductivity characterization
Unal, B.; Durmus, ZEHRA; Baykal, A.; SOZERI, H.; Toprak, M. S.; Alpsoy, L. (2010-08-27)L-Histidine capped iron oxide nanoparticles (HCIO) have been synthesized in one pot in the presence of L-histidine. The final product was analyzed for composition, microstructure, ac-dc conductivity performance as well as ... -
Magnetic and dielectric characterization of alginic acid-Fe3O4 nanocomposite
Durmus, ZEHRA; SOZERI, H.; Unal, B.; Baykal, A.; Topkaya, R.; Kazan, S.; Toprak, M. S. (2011-02-01)We have reported the synthesis of water dispersible alginic acid (AA)-Fe3O4 nanocomposites. The crystallite size was obtained as 9 +/- 2 nm from X-ray line profile fitting. As compared to the particle size of 9.2 nm obtained ... -
Magnetic and Microwave Absorption Properties of Magnetite (Fe3O4)@ Conducting Polymer (PANI, PPY, PT) Composites
Unver, Ibrahim Saim; Durmus, ZEHRA (2017-10-01)Magnetite nanoparticles (Fe3O4 NPs) were synthesized via reflux co-precipitation method and coated with various polymeric media of polypyrrole (PPY), polyaniline (PANI), and polythiophene (PT) in the same experiment ... -
MAGNETIC SOLID PHASE EXTRACTION FOR A NEW HPLC METHOD FOR THE DETERMINATION OF GEMIFLOXACIN IN HUMAN PLASMA AND BREAST MILK
Durmus, ZEHRA; Tekkeli, SerIfe Evrim Kepekci; Kiziltas, Mustafa Volkan; Onal, Armagan (2017-06-01)A simple analytical procedure, magnetic solid phase extraction combination to HPLC, has been developed for the analysis of gemifloxacin in human plasma and breast milk. Before chromatographic separation, magnetic solid ... -
Microwave Absorption Properties of BaFe12O19-TiO2 Composite Coated with Conducting Polymer
Akman, O.; Kavas, H.; Baykal, A.; Durmus, ZEHRA; Aktas, B.; SOZERI, H. (2013-04-01)This study investigates microwave absorption properties of Ba-hexaferrite (BaFe12O19) and titanium dioxide (TiO2) particles coated with conducting polymer (PANI) and BaFe12O19-TiO2 mixture in the frequency range of 8-18 ... -
PEG-Assisted Synthesis of Mn3O4 Nanoparticles: A Structural and Magnetic Study
Durmus, ZEHRA; Tomas, Merve; Baykal, Abdulhadi; Kavas, Huseyin; Toprak, Muhammed S. (2011-01-01)We report on the synthesis of Mn3O4 nanoparticles via a polyethyleneglycol (PEG)-assisted hydrothermal route. Crystalline phase was identified as Mn3O4. The crystallite size from X-ray Diffraction (XRD) pattern and particle ... -
Poly(vinyl phosphonic acid) (PVPA)-BaFe12O19 Nanocomposite
Durmus, ZEHRA; Kavas, H.; SOZERI, H.; Toprak, M. S.; Aslan, A.; Baykal, A. (2012-05-01)We present a method for the fabrication of PVPA/BaFe12O19 nanocomposite by in-situ polymerization of vinyl phosphonic acid, VPA in the presence of synthesized BaFe12O19 NPs. Nanoparticles and the nanocomposite were analyzed ... -
Polymerization characteristics of colored compomers cured with different LED units
Durmus, ZEHRA; Yilmaz, BERZA; Bakkal, MELTEM; Durmus, Ali; Ozalp, Serife (2019-02-01)Aim: Incomplete polymerization of a resin material used for dental restoration affects the properties of the restoration. We evaluated the structural and mechanical properties of three different colored compomers cured ... -
Polyol synthesis of (polyvinylpyrrolidone) PVP-Mn3O4 nanocomposite
Baykal, A.; Bitrak, N.; Unal, B.; Kavas, H.; Durmus, ZEHRA; Ozden, S.; Toprak, M. S. (2010-07-16)We report on the synthesis of (polyvinylpyrrolidone) PVP-Mn3O4 nanocomposite via a polyol route. Crystalline phase was identified as Mn3O4 and the crystallite size was obtained as 6 +/- 1 nm from X-ray line profile fitting. ...
