نتایج جستجو برای: gas chromatographymass spectroscopic studies
تعداد نتایج: 1684878 فیلتر نتایج به سال:
in this research calcium fluoride nanoparticles and its different amount of cerium ion dopant (5%and 10%) were prepared. the mentioned nanoparticle were studied by fourier transform infrared spectroscopy (ftir) , x-ray diffraction (xrd), absorption and photoluminescence spectra (pl) and scanning electron microscopy (sem). the xrd patterns indicate a typical cubic fluorite structure and no other...
abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...
Mass-spectroscopic experiments related to the endohedral metallofullerene are reviewed. Generation techniques of gas phase clusters, FT-ICR mass spectroscopy experiments, and ion mobility experiments are overviewed. Based on those experimental results, the formation mechanism of endohedral metallofullerene is discussed with classical molecular dynamics simulation results. Finally, exotic predic...
in the present study, the interaction between nano-tio2 and lysozyme was investigated by the method of uv-vis detection and fluorescence spectroscopic techniques. the thermal denaturation of lysozyme has been investigated in the presence and absence of nano-tio2 over the temperature range (293-373) k in different buffer and ph, using temperature scanning spectroscopy. the presence of nano-tio2 ...
abstract adsorption of proteins on inorganic surfaces may lead to structural and functional changes that are dependent on both the nature of the adsorbed proteins and the physicochemical properties of the inorganic surfaces. chicken egg white lysozyme (e.c 3.2.1.17, mw=14.6 kda) is a small globular protein, that consists of 129 amino acid residues with four disulfide bonds. the aim of this stud...
In this research Calcium fluoride nanoparticles and its different amount of cerium ion dopant (5%and 10%) were prepared. The mentioned nanoparticle were studied by fourier transform infrared spectroscopy (FTIR) , X-ray diffraction (XRD), absorption and photoluminescence spectra (PL) and Scanning electron microscopy (SEM). The XRD patterns indicate a typical cubic fluorite structure and no other...
Significant progress has been made over the last few years to explore the gaseous halo of the Milky Way by way of absorption spectroscopy. I review recent results on absorption line studies in the halo using various instruments, such as the Far Ultraviolet Spectroscopic Explorer, the Space Telescope Imaging Spectrograph, and others. The new studies imply that the infall of lowmetallicity gas, t...
In this research Calcium fluoride nanoparticles and its different amount of cerium ion dopant (5%and 10%) were prepared. The mentioned nanoparticle were studied by fourier transform infrared spectroscopy (FTIR) , X-ray diffraction (XRD), absorption and photoluminescence spectra (PL) and Scanning electron microscopy (SEM). The XRD patterns indicate a typical cubic fluorite structure and no other...
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