Yazar "Aydin, I" seçeneğine göre listele

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    Öğe
    Determination of stability constants and thermodynamic parameters of some metal complexes with 2-hydroxynaphthalene-1-carbaldehydene-1-naphthylamine
    (Maik Nauka/Interperiodica/Springer, 2005) Ziyadanogullari, B; Aydin, F; Sahin, E; Aydin, I; Temel, H
    The thermodynamic parameters of complexes of Cu(II), Ni(II), and Zn(II) cations with hydroxynaphthalene-1-carbaldehydene-1-naphthylamine were determined in 60% (v/v) DMF-water, at various ionic strengths (0.07, 0.13, 0.2 M NaNO3), and at different temperatures (25, 30, 35, 40 +/- 0.1 degrees C) using a spectrophotometric method. A sodium nitrate solution was used to maintain the ionic strengths. The stability constants show an inverse relationship with the ionic strengths. The thermodynamic parameters (60% (v/v) DMF-water (Delta G(0), Delta H-0, Delta S-0)) based on these formation constants were determined. The acid dissociation constant of the ligand was investigated in 60% (v/v) DMF-water and was also calculated at different temperatures.
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    Öğe
    Morphologic and functional alterations of the thyroid gland in rabbits treated with lithium
    (Georg Thieme Verlag, 1996) Aydin, I; Aslan, I; Bahceci, M; Aydin, M
    [Abstract Not Available]
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    Öğe
    Recovery of uranium, nickel, molybdenum, and vanadium from floated asphaltite ash
    (Taylor & Francis Inc, 2004) Ziyadanogullari, R; Aydin, I
    In this study, asphaltite ash obtained from asphaltite was sulfurized under an autoclave condition, and then this sample was floated by two different xanthates. The amount of uranium, nickel, molybdenum, and vanadium in the asphaltite ash was concentrated approximately 12 times. Uranium, nickel, molybdenum, and vanadium in the concentrated samples were separated in the following stages: first the concentrate was leached with different concentrations of (NH4)(2)CO3 to recover uranium and aluminium; in the second stage, the remaining sample was roasted with treated pyrite at 700degreesC and leached by water to obtain soluble nickel compounds; in the third stage, the remaining sample was leached with 15 M H2SO4 to solublise molybdenum, titanium, and iron compounds. A solid sample containing vanadium compounds was removed from a solution containing molybdenum, titanium, and iron compounds. This solution was extracted with alamine 336 to separate molybdenum from titanium and iron.
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    Öğe
    Removal of cadmium from aqueous solution by natural and thermally activated dolomite
    (Inst Lebensmitteltechnologie Analytische Chemie, 2002) Yavuz, Ö; Ziyadanogullari, B; Aydin, I; Bingöl, H
    Removal of Cd(II) from aqueous solution by natural and thermally activated dolomite was investigated. Maximum activation temperature and maximum adsorption capacities were determined as 700 degreesC for 2 hours and 1.02 mg g(-1) for natural dolomite, but 64.93 mg g(-1) for thermally activated dolomite at 25 degreesC, respectively. Equilibrium contact time of cadmium was determined as 1 hour. Adsorption of Cd(II) on dolomite conforms to Langmuir's isotherm.
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    Öğe
    Synthesis, spectral studies, and determination of stability constants and thermodynamic parameters for some aromatic diamine transition-metal complexes
    (Pleiades Publishing Inc, 2006) Temel, H; Ziyadanogullari, B; Alp, H; Aydin, I; Aydin, F; Ilhan, S
    The Cu(II) and Zn(II) complexes of aromatic bidentate diamines were prepared and characterized by different analytical and spectral methods. Thermodynamic parameters of complexes of Cu(II) and Zn(II) cations with 1,3-bis(p-aminophenoxy)propane were determined in 60 vol. % DMF-H2O at various ionic strengths (0.07, 0.13, 0.2 M NaNO3) and different temperatures (45, 50, 55, 60 +/- 0.1 degrees C) using a spectrophotometric method. The NaNO3 solution was used to maintain the ionic strength. The stability constants show an inverse relationship with ionic strengths. The thermodynamic parameters of 60 vol. % DMF-H2O (Delta G degrees, Delta H degrees, Delta S degrees) based on these formation constants were determined.
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    Synthesis, spectroscopic and thermodynamic studies of new transition metal complexes with N,N?-bis(2-hydroxynaphthalin-1-carbaldehydene)-1,2-bis(m-aminophenoxy)ethane and their determination by spectrophotometric methods
    (Taylor & Francis Ltd, 2005) Temel, H; Ziyadanogullari, B; Aydin, I; Aydin, F
    A novel tetradentate N2O2-type Schiff base, synthesized from 1,2-bis(m-aminophenoxy)ethane and 2-hydroxynaphthalin-1-carbaldehyde, forms stable complexes with transition metal ions such as Cu(II), VO(IV) and Zn(II) in DMF. Microanalytical data, elemental analysis, magnetic measurements, UV, visible and IR spectra as well as conductance measurements were used to confirm the structures. The stability constants of these complexes in 60% (v/v) DMF-water were determined at different ionic strengths (0.07, 0.13, 0.2 M) and at different temperatures (45,50,55,60 +/- 0.1 degrees C) using a spectrophotometric method. From these constants, thermodynamic stability constants and thermodynamic parameters (Delta G(0), Delta H degrees, Delta S degrees) were calculated. The values of enthalpy change are negative for all systems. The acid dissociation constant of the ligand, investigated in 60% (v/v) DMF-water, has also been calculated at different temperatures.