Yazar "YURDAKOC, K" seçeneğine göre listele

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    CONCENTRATION-DEPENDENCE OF NMR T1 IN AGAR SOLUTIONS
    (Marcel Dekker Inc, 1993) ASKIN, M; YURDAKOC, K; GULSUN, Z
    In this study, in order to explain solvent proton relaxation mechanism, the spin-lattice relaxation time (T1) of agar solutions was measured as a function of agar concentration. Relaxation measurements were carried out by a FT-NMR spectrometer operating at 60 MHz and inversion recovery pulse squence was used. Relaxation rate(1/T1a) was linearly proportional to concentration of agar solution (C), and the T1 mechanism of solvent water protons in agar solutions should be caused by the chemical exchange of water protons between free and bound water.
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    Öğe
    CONCENTRATION-DEPENDENCE OF NMR T1 IN AGAR SOLUTIONS
    (Marcel Dekker Inc, 1993) ASKIN, M; YURDAKOC, K; GULSUN, Z
    In this study, in order to explain solvent proton relaxation mechanism, the spin-lattice relaxation time (T1) of agar solutions was measured as a function of agar concentration. Relaxation measurements were carried out by a FT-NMR spectrometer operating at 60 MHz and inversion recovery pulse squence was used. Relaxation rate(1/T1a) was linearly proportional to concentration of agar solution (C), and the T1 mechanism of solvent water protons in agar solutions should be caused by the chemical exchange of water protons between free and bound water.
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    Öğe
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    FT-IR STUDY OF THE ADSORPTION OF PROPANE AND PROPENE ON V2O5/GAMMA-AL2O3 CATALYST
    (Marcel Dekker Inc, 1993) YURDAKOC, K; HONICKE, D
    It has been observed on the oxidized V2O5/gamma-Al2O3 that C3H6 form alkoxides which were converted to acetone during the desorption of adsorbate phase at 373 K. C3H8 may form pi-complexes on the reduced form of the same catalyst. However, the intensities of the bands in the ad-adsorption Of C3H8 were very weak as compared with the case Of C3H6 adsorption. Therefore, it was not reasonable to assign these bands clearly as any of the surface type species.
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    Öğe
    FT-IR STUDY OF THE ADSORPTION OF PROPANE AND PROPENE ON V2O5/GAMMA-AL2O3 CATALYST
    (Marcel Dekker Inc, 1993) YURDAKOC, K; HONICKE, D
    It has been observed on the oxidized V2O5/gamma-Al2O3 that C3H6 form alkoxides which were converted to acetone during the desorption of adsorbate phase at 373 K. C3H8 may form pi-complexes on the reduced form of the same catalyst. However, the intensities of the bands in the ad-adsorption of C3H8 were very weak as compared with the case Of C3H6 adsorption. Therefore, it was not reasonable to assign these bands clearly as any of the surface type species.