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    Excess molar volumes, and refractive index of binary mixtures of glycerol + methanol and glycerol + water at 298.15 k and 303.15 K
    (2011) Vural U.S.; Muradoglu V.; Vural S.
    Excess molar volumes (VE) 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 (VE) have been calculated from density. The excess molar volume (VE) 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 VE obviously due to increased physical interactions between glycerol and methanol, and water. © 2011 Chemical Society of Ethiopia.
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    Excess volumetric properties of mixtures (epichlorohydrine + toluene and epichlorohydrine + xylene) at 298.15, 308.15, 323.15, and 338.15 K
    (2004) Vural U.S.; Muradoglu V.; Yuruk H.
    The densities and excess molar volumes of (epichlorohydrine + toluene and xylene) mixtures were determined at different temperatures. The graphs of excess molar volumes against mole fraction of mixtures show a negative and positive slope because of charge-transfer interaction and physical forces at 298.15, 308.15, 323.15, and 338.15 K, respectively.
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    Excess volumetric properties of mixtures epichlorohydrine + acetone or chloroform at 291.15 and 296.15 K
    (2003) Vural U.S.; Yuruk H.; Muradoglu V.
    The excess molar volumes and densities of mixtures containing epichlorohydrine, acetone, and chloroform were determined at different temperatures by the Redlich-Kister equation. Chemical interaction and physical forces are very important influences on the excess molar volume of (epichlorohydrine + acetone or chloroform) mixtures. In addition, the variations of excess molar volumes were expressed as function of temperature.
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    Synthesis and characterization of thermally stable oligomermetal complexes of copper(II), nickel(II), zinc(II) and cobalt(II) derived from oligo-p-nitrophenylazomethinephenol
    (2006) Vural U.S.; Mart H.; Demir H.O.; Sariöz O.; Muradoglu V.; Koç M.C.
    Thermally stable metal complexes based on oligomers were prepared by the reaction between oligo-p-nitrophenilazomethinephenol (ONPAP) and Cu(II), Ni(II), Zn(II) and Co(II) ions. The properties of oligomer-metal complexes were studied by elemental, FT-IR and magnetic moments analyses. The thermal stabilities of the oligomer-metal complexes were compared by thermogravimetric (TG) and differential thermal (DTA) analyses. According to TG, oligomer-metal complexes were stable against to temperature and thermooxidative decomposition. The weight losses of oligomer-metal complexes were found to be 5 and 50% at 200 and > 850 (Cu(II)), 172 and 600 (Ni(II)), 252 and > 850 (Zn(II)) and 174 and 510 (Co(II)), °C, respectively. Based on half degradation temperature parameters Cu(II) and Zn(II) complexes were more resistant than the others. © 2006 Chemical Society of Ethiopia.