Yazar "GULSUN, Z" seçeneğine göre listele

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    Öğe
    CALCULATION OF SOME STRUCTURAL PARAMETERS OF COLLOIDAL ASPHALT SUSPENSIONS FROM NMR-SPECTRA
    (R Oldenbourg Verlag, 1987) GULSUN, Z
    [Abstract Not Available]
  • [ X ]
    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.
  • [ X ]
    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
    EFFECT OF WATER RATIO OF ELECTROLYTE ON THE PROPERTIES OF SI/ANODIC OXIDE INTERFACES
    (Council Scientific Industrial Research, 1993) KILICOGLU, T; OZTURK, ZZ; EBEOGLU, MA; GULSUN, Z
    In order to study the effect of water ratio on the properties of Si/anodic oxide (AO) interface, metal-oxide-semiconductor capacitors have been used. Anodic oxide films were grown under constant current conditions by using 0.034 M NH4NO3, solution in methanol and its solutions diluted with deionized water of 2 and 10 per cent. The small signal capacitance and conductance of MOS were measured as a function of the bias at both room temperature and at 77 K. The analysis of the C-V curves showed a maximum of interface states of different values in lower-half of the band gap at room temperature, while this maximum was missing at 77 K. This maximum may be due to the unsaturated dangling bonds of the interfaces.
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    Öğe
    HEAVY-METAL POLLUTION IN WATER, SEDIMENT AND FISH FROM THE TIGRIS RIVER IN TURKEY
    (Pergamon-Elsevier Science Ltd, 1994) GUMGUM, B; UNLU, E; TEZ, Z; GULSUN, Z
    Some heavy metals (Co, Cu, Mo, Ni, Pb, V and Zn) were determined in water, sediments and some fish species (Cyprinion macrostomus and Garra rufa) from the Tigris River. Mo and V were not detected in water and Co, Cu, Ni, Pb, Zn were found low values. Co, Cu, Ni, Pb, V and Zn were found very high levels in the sediments. All the fish samples contain high concentrations of Cu, Ni and Zn, while Co, Mo, Pb and V were not detected. The high concentrations of heavy metals may be directly related to the contamination of the Tigris River by Ergani Copper Plant and the geochemical structure of this region.
  • [ X ]
    Öğe
    INVESTIGATION OF H-1 AND C-13 SPIN-LATTICE RELAXATION-TIMES IN ASPHALT SUSPENSIONS
    (Butterworth-Heinemann Ltd, 1987) GULSUN, Z
    [Abstract Not Available]