Yazar "Muradoglu, V." seçeneğine göre listele

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    EXCESS MOLAR VOLUMES, AND REFRACTIVE INDEX OF BINARY MIXTURES OF GLYCEROL plus METHANOL AND GLYCEROL + WATER AT 298.15 K AND 303.15 K
    (CHEM SOC ETHIOPIA, 2011) Vural, Ufuk Sancar; Muradoglu, V.; Vural, Sedat
    Excess molar volumes (V-E) viscosities and refractive index have been evaluated for binary mixtures of glycerol + water, and glycerol + methanol at 298.15 K and 303.15 K. Excess molar volumes (V-E) have been calculated from density. The excess molar volume (V-E) results were fitted to the Redlich and Kister type polynomial equation to derive the binary coefficients and estimate the standard deviations between experimental and calculated results. It is observed that all mixtures show positive values of V-E obviously due to increased physical interactions between glycerol and methanol, and water.
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    Excess molar volumes, viscosity, refractive index, and Gibbs energy of activation of binary biodiesel plus benzene, and biodiesel plus toluene mixtures at 298.15 and 303.15 K
    (MAIK NAUKA/INTERPERIODICA/SPRINGER, 2008) Vural, Ufuk Sancar; Durmaz, Fatih; Kocyigit, Ozcan; Kocyigit, Hasan; Muradoglu, V.; Akin, Beril
    Excess molar volumes (VE ), viscosities, refractive index, and Gibbs energies were evaluated for binary biodiesel + benzene and toluene mixtures at 298.15 and 303.15 K. The excess molar volumes VE were determined from density, while the excess Gibbs free energy of activation G*Ewas calculated from viscosity deviation Delta eta. The excess molar volume (V E), viscosity deviation (Delta eta), and excess Gibbs energy of activation (G*E) were fitted to the Redlich-Kister polynomial equation to derive binary coefficients and estimate the standard deviations between the experimental data and calculation results. All mixtures showed positive V E values obviously caused by increased physical interactions between biodiesel and the organic solvents.
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    Thermally stable oligomer-metal complexes based on oligo-ortho-aminophenol and oligophenylazomethinephenol
    (SLOVAK ACADEMIC PRESS LTD, 2006) Mart, H.; Koc, M. C.; Muradoglu, V.; Yueruek, H.
    The oligo-ortho-aminophenol was synthesized by the oxidative polycondensation of ortho-aminophenol with air oxygen. The oligophenylazomethinephenol was synthesized by the condensation of aniline with oligosalicylaldehyde. Metal complexes of these oligomers with Cu(II), Co(II), Zn(II), and Ni(II) were synthesized and characterized. Based on the results of thermogravimetric analysis, synthesized oligomer-metal complexes were more stable against heat and thermooxidative decomposition than some polymeric Schiff bases and polymer-metal complexes. Additionally, the presence of metal ions increased the thermal stability of oligo-ortho-aminophenol, while the thermal stability of oligophenylazomethinephenol was lowered.