Time filter

Source Type

Istanbul, Turkey

Fatih University is a private university with branches in Büyükçekmece, and, Anatolian Side, Istanbul, Turkey. In Turkey, there is no private university in the actual sense yet: All universities are subject to regulations of the Higher Education Council and all get their students via Student Selection and Placement Center , a governmental institution that holds countrywide compulsory exam for entrance to universities. It employs professors from over 30 countries focusing on academic diversity. Fatih University has the highest number of international students among Turkish universities, which makes it the most colorful Turkish university. Tuition fee is lower for international students than for native students. The number of students getting education at the university is around 14 thousand.English is the medium of instruction in most departments, and students are encouraged to learn an additional foreign language. There are also separate/parallel departments that teach students in Turkish, native language.The university was established in 1996 by the Turkish Association of Health and Medical Treatment. The ninth President Suleyman Demirel was present at the formal inauguration of the University in November 1996.The rector of Fatih University is Prof. Dr. Şerif Ali Tekalan. Mustafa Özcan is the Chairman of the Board of Trustees of Fatih University. With regard to its social inclination, it has connections with the Islamic Gülen movement of the Turkish cleric Fethullah Gülen. Wikipedia.

Senel M.,Fatih University
Synthetic Metals | Year: 2011

Glucose oxidase (GOx) was covalently immobilized onto an electrochemically prepared novel copolymer of ferrocene branched polypyrrole for the construction of an amperometric glucose biosensor. Ferrocene-pyrrole monomers were prepared by condensation reaction between ferrocene ethanol and 3-(1H-pyrrol-1-yl) propanoic acid and ferrocene-pyrrole, 3-(1H-pyrrol-1-yl)propanoic acid, and pyrrole monomers were electrochemically polymerized on the surface of the electrode. GOx was covalently immobilized onto the co-polymer coated electrode surface by using coupling agents to create amine bonds. The prepared copolymers were utilized as conducting films for amperometric glucose sensing after immobilization of GOx. Amperometric response was measured as a function of concentration of glucose at a fixed potential of +0.38 V vs. Ag/AgCl in a phosphate-buffered saline solution (pH 7.0). Results clearly showed that the ferrocene groups on the co-polymer play the role of electron transfer mediator between the redox center of glucose oxidase (GOx) and the surface of the electrode. Also, the effects of pH and temperature, storage, reusability and interference of the amperometric glucose biosensor were investigated. © 2011 Elsevier B.V. All rights reserved.

Sevimoglu O.,Fatih University | Tansel B.,Florida International University
Waste Management | Year: 2013

Performances of gas engines operated with landfill gas (LFG) are affected by the impurities in the LFG, reducing the economic viability of energy recovery. The purpose of this study was to characterize the trace compounds in the LFG at the Odayeri Landfill, Istanbul, Turkey which is used for energy recovery. Composite gas samples were collected and analyzed for trace compounds (hydrocarbons, siloxanes, and volatile halogenated hydrocarbons) over a 3-year period. Trace compounds entering the gas engines, their impact on the engine performance were evaluated. The operational problems included deposit formation in the combustion chamber, turbocharger, and intercooler of engine before the scheduled maintenance times. High levels of hydrogen sulfide, as well as chlorinated and fluorinated compounds cause corrosion of the engine parts and decrease life of the engine oils. Persistence of siloxanes results in deposit formation, increasing engine maintenance costs. Pretreatment of LFG is necessary to protect the engines at the waste-to-energy facilities with persistence levels of siloxanes and volatile halogenated hydrocarbons. © 2012 Elsevier Ltd.

Gonca E.,Fatih University
Journal of Fluorine Chemistry | Year: 2013

By cyclotetramerization of 2,3-bis[2-fluoro-5-(trifluoromethyl)benzylthio] maleonitrile in the presence of magnesium butanolate, magnesium porphyrazinate carrying eight (2-fluoro-5-(trifluoromethyl)benzylthio) functional groups on the periphery positions has been synthesized. Conversion of the magnesium porphyrazinate into the metal-free derivative was achieved by treatment with trifluoroacetic acid. Further reaction of this product with different metal (II) acetates have led to the metallo porphyrazines. Then, chloro-octakis [2-fluoro-5-(trifluoromethyl)benzylthio] porphyrazinato iron (III) (FePzCl) was prepared by the reaction of metal-free porphyrazine with iron (II) acetate and further treatment with HCl solution. The monomeric bisaxial complex FePz(py)2 as well as the bridged complex [FePz(pyz)]n were formed as stable complexes by reacting FePzCl with pyridine or pyrazine, respectively. These novel complexes were characterized by elemental analysis, together with FT-IR, 1H NMR, 13C NMR, 19F NMR, UV-vis and mass spectral data. © 2013 Elsevier B.V.

MnxNi1-xFe2O4 (x=0.2, 0.4, 0.6) nanoparticles were synthesized by a polyethylene glycol (PEG)-assisted hydrothermal route. We present a systematic investigation on the structural, magnetic, electrical and dielectric properties of the products by using XRD, FT-IR, SEM, TGA, VSM and dielectric spectroscopy, respectively. Single phased cubic spinel structure was confirmed for all samples and the average crystallite size of the products was estimated using Line profile fitting and ranges between 6.5 and 11 nm. The nanoparticles have ferromagnetic nature with small coercivity. The samples showed semiconducting behavior which is revealed from temperature dependent conductivity measurements. Temperature and frequency dependent dielectric property; dielectric permittivity (ε) and ac conductivity (σAC) studies for the samples indicated that the dielectric dispersion curve for all samples showed usual dielectric dispersion confirming the thermally activated relaxation typical for Debye-like relaxation referring to it as the Maxwell-Wagner relaxation for the interfacial polarization of homogeneous double structure. The particle size, saturation magnetization, coercive field, conductivity and dielectric constant of the samples are strictly temperature dependent and increased with Mn concentration. © 2012 Elsevier Ltd and Techna Group S.r.l.

A film of chitosan-polypyrrole-gold nanoparticles was fabricated by in-situ chemical synthesis method and its application in glucose biosensor was investigated. The obtained biosensor exhibited a high and reproducible sensitivity of 0.58 μA/mM, response time ~ 4 s, linear dynamic range from 1 to 20 mM, correlation coefficient of R2 = 0.9981, and limit of detection (LOD), based on S/N ratio (S/N = 3) of 0.068 mM. A value of 1.83 mM for the apparent Michaelis-Menten constant was obtained. The resulting bio-nanocomposite provided a suitable environment for the enzyme to retain its bioactivity at considerably extreme conditions, and the decorated gold nanoparticles in the bio-nanocomposite offer good affinity to enzyme. © 2014 Published by Elsevier B.V.

Discover hidden collaborations