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Publication year : 2011 ✕Databases : Sciencedirect ✕
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Synthesis, electrochemical and structural characterization of novel azacrown ether containing macrocyclic redox-active vic-dioxime ligand and its mononuclear transition metal complexes: Application of DEPT, HSQC, HMBC-NMR and cyclic voltammetry

Ali Osman SOLAK

This paper presents a new azacrown containing vic-dioxime; anti-N-(4-aminophenyl)aza-15-crown-5-glyoxime (LH2), and its mononuclear nickel(II), copper(II), cobalt(II), cadmium(II) and zinc(II) complexes. The azacrown moieties appended at the periphery of the oxime provide solubility for the vic-dioxime ligand and complexes in common organic solvents. The mononuclear M(LH)2 (M = Ni and Cu), M(LH)2(H2O)2 (M = Co) and [M(LH)(H2O)(Cl)] (M = Cd and Zn) complexes have been obtained with the metal:ligand ratios of 1:2 and 1:1. The structure of the ligand is confirmed by elemental analysis, Fourier tr ...More

Article 2011 Mühendislik Fakültesi Polyhedron3 ( 10 ) 42 Views
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1,10-Phenanthroline modified glassy carbon electrode for voltammetric determination of cadmium(II) ions

Ali Osman SOLAK

This study reports the electrochemical modification of glassy carbon (GC) electrode surface with the electro-polymerized form of 1,10-phenanthroline monohydrate (PMH), the characterization of this polyphenanthroline modified electrode (PPMH/GC) and the electroanalytical application suitable for the determination of Cd(II) ions. The PPMH/GC electrode was characterized by cyclic voltammetry, chronoamperometry and atomic force microscopy and formation of polyphenanthroline layer grafted to surface of GC electrode was evidenced. Selectivity of PPMH/GC electrode towards heavy metal ions was investi ...More

Article 2011 Mühendislik Fakültesi Sensors and Actuators B: Chemical157 ( 1 ) 67 Views
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Direct electron transfer from glucose oxidase immobilized on polyphenanthroline-modified glassy carbon electrode

Ali Osman SOLAK

This study reports direct electron transfer (DET) from immobilized glucose oxidase (GOx) via grafted and electropolymerized 1,10-phenanthroline monohydrate (PMH). The layer of poly-1,10-phenanthroline (PPMH) was gained via electrochemical deposition, which was used to create the PPMH-modified GC-electrode (PPMH/GC-electrode). Further, the GOx was immobilized on the PPMH/GC-electrode. The effect of surface-modification by the PPMH on the electron-transfer between enzyme and electrode-surface and some other electrochemical/analytical-parameters of newly designed enzymatic-electrode were evaluate ...More

Article 2011 Mühendislik Fakültesi Biosensors and Bioelectronics26 ( 5 ) 132 Views
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Application of the linear principle for the strongly-correlated variables: Calculations of differences between spectra

Ali Osman SOLAK

In this paper the authors suggest a new method of detection of possible differences between similar near infrared (NIR) spectra based on the self-similar (fractal) property. This property is a general characteristic that belongs to a wide class of the strongly-correlated systems. As an example we take a set of NIR spectra measured for three systems: (1) glassy carbon (GC) electrodes, (2) GC electrodes affected by azobenzene (AB) substance and finally (3) films (AB-FILM). Besides the physical model that should describe the intrinsic properties of these substances we found the fitting function t ...More

Article 2011 Mühendislik Fakültesi Communications in Nonlinear Science and Numerical Simulation16 ( 10 ) 54 Views
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A survey of concentration of aflatoxin M1 in dairy products marketed in Turkey

Zafer GÖNÜLALAN

The aim of this study was to examine the presence of aflatoxin M1 (AFM1) in dairy product samples by enzyme-linked immunosorbent assay (ELISA). Aflatoxin M1 were found in 135 (64%) out of 210 analyzed samples. Only 7% of dairy product samples were contaminated at levels above the legal limits. AFM1 was detected in 43 (86%) of milk samples (ranging from 1 to 30 ng/l), in 38 (63%) of cheese (ranging from 12 to 378 ng/kg), in 28 (56%) of yoghurt (ranging from 2.5 to 78 ng/kg) and in 26 (52%) of dairy dessert samples (ranging from 1.5 to 80 ng/kg). None of the raw milk samples contained levels abo ...More

Article 2011 Mühendislik Fakültesi Food Control22 ( 12 ) 20 Views
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Tourism Sector in Order to Recovering From the Recession: Comparison Analyses for Turkey

Muhsin HALİS

2008 economic crisis hit very hard many sectors globally, beside tourism, too. According to the economical and financial reports, the demand of hotel & restaurant industry declined sharply, and as a result of that situation tourism revenues had been affected negatively. Turkey was one of the few destination, which had a growing at the international tourist arrivals despite the 2008 crisis. Although the tourism revenues declined, but it was little while comparing with its competitors. Via the analyses of data's has been obtained by Prime Ministry Undersecretaries of Treasury, the effects of the ...More

Proceedings Paper 2011 İktisadi ve İdari Bilimler Fakültesi Procedia - Social and Behavioral Sciences24 61 Views
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