Güncel Gönderiler: Fen Fakültesi
Toplam kayıt 2379, listelenen: 2241-2260
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Fourier Transform Infrared, Solid-State Nuclear Magnetic Resonance, and X-Ray Diffraction Studies of Natural and Acid-Treated Bentonites from Turkey
(Taylor & Francis Inc, 2013)The Fourier transform infrared (FT-IR) technique is widely used to distinguish structural properties and to derive information about structural changes following the chemical modification of clays in different conditions. ... -
Nmr Spectroscopic Study and Dft Calculations of Giao Nmr Shieldings and (1)J(Ch) Spin-Spin Coupling Constants of 1,9-Diaminononane
(Chem Soc Ethiopia, 2009)H-1, proton coupled and decoupled C-13, DEPT, HETCOR NMR spectra, the magnitude of one bond (1)J(CH) coupling constants and C-13 NMR spin-lattice relaxation time (T-1) of 1,9-diaminononane (danon, C9H22N2) have been reported ... -
Vibrational Spectroscopic Investigation of Some Hofmann-T-d Type Complexes: Ni(1-Phenylpiperazine)(2)M(CN)(4) (M = Cd or Hg)
(Chem Soc Pakistan, 2009)New Hofmann-T-d type complexes in the form of Ni(PP)(2)M(CN)(4) (where pp = I-Phenylpiperazine and M = Cd or Hg) have been prepared in powder form and their infrared (4000-100 cm(-1)) and Raman (2800-1650 cm(-1)) spectra ... -
Influence of acid treatment on structure of clinoptilolite tuff and its adsorption of methane
(Springer, 2015)This study presents the results of the methane adsorption properties of clinoptilolite tuff from Bigadic, Turkey and that of acid treated forms at 273 and 293 K up to 100 kPa using volumetric apparatus. In order to assess ... -
Acid treated mordenites as adsorbents of C2H4 and H-2 gases
(Elsevier Science BV, 2017)In this study, a mordenite-rich tuff (M) from the Sile region (NW Turkey) was treated with HNO3 and H2SO4 at various concentrations (1.0, 3.0 and 5.0 M) at 80 degrees C for 3 h. The adsorption properties of ethylene (C2H4) ... -
Ethylene Adsorption on Acid-treated Clay Minerals
(Multi-Science Publ Co LTD, 2012)The adsorption of ethylene (C2H4) on five clay minerals (sepiolite, two kaolinites and two bentonites) and on forms treated with 1 M HCl solution (SH, K1H, K2H, B1H and B2H) was investigated. Adsorption isotherms for ... -
Hydrogen adsorption on natural and sulphuric acid treated sepiolite and bentonite
(Pergamon-Elsevier Science LTD, 2018)In this study, hydrogen (H-2) adsorption on sepiolite and bentonite and those of acid treated forms were studied at 77 K using volumetric apparatus up to 100 kPa. Both clay minerals were treated with 100 ml of 0.5, 1.0, ... -
DFT, FT-Raman, and FT-IR investigations of 1-cyclopropylpiperazine
(Maik Nauka/Interperiodica/Springer, 2013)FT-IR and FT-Raman spectra of 1-cyclopropylpiperazine (1cppp) are experimentally examined in the range 4000-200 cm(-1). The optimized geometric parameters, conformational equilibria, normal mode frequencies and corresponding ... -
Vibrational spectroscopic investigation of methyl(5-[2-thienylcarbonyl]-1H-benzimidazol-2-yl: A comparative density functional study
(Maik Nauka/Interperiodica/Springer, 2014)FT-IR and Raman spectra of methyl(5-[2-thienylcarbonyl]-1H-benzimidazol-2-yl (nocodazole) are experimentally examined in the region of 4000-400 cm(-1). The optimized geometric parameters, conformational equilibria, normal ... -
Adsorption studies of hydrogen and ethylene on cation-exchanged bentonite
(Mineralogical Soc, 2017)The adsorption of C2H4 and H-2 gases by bentonite from the Unye region, Turkey both as raw (B) and as K+-, Li+-, Ag+- and Mg2+- exchanged forms, was investigated using automated volumetric equipment and pressures up to 100 ... -
Effects of hydrochloric acid treatment on structure characteristics and C2H4 adsorption capacities of nye bentonite from Turkey: a combined FT-IR, XRD, XRF, TG/DTA and MAS NMR study
(Springer, 2016)In this study, a bentonite sample from nye, Turkey was treated with various HCl solutions (0.1, 1.0 and 5.0 M) at 90 A degrees C during 3 and 6 h. X-ray diffraction (XRD), X-ray fluorescence (XRF), differential thermal ... -
Investigation of clinoptilolite rich natural zeolites from Turkey: a combined XRF, TG/DTG, DTA and DSC study
(Springer, 2010)Turkey clinoptilolite-rich tuffs from Gordes and Bigadi double dagger regions of western of Anatolia and their exchanged forms (K(+), Na(+), Mg(2+) and Ca(2+)) were characterized by TG/DTG-DTA, DSC and XRF methods and the ... -
Thermal, structural and ethylene adsorption properties of Ag-, Cu- and Fe-modified bentonite from Turkey
(Springer, 2016)Thermal and structural properties of bentonite from Unye (Turkey) and that of Ag-, Cu-and Fe-modified forms were investigated by differential thermal analysis, thermogravimetric analysis, X-ray diffraction and surface area ... -
Barrier lowering effect and dark current characteristics in asymmetric GaAs/AlGaAs multi quantum well structure
(Springer, 2011)In this study, we investigate dark current voltage characteristics of GaAs/AlGaAs staircase-like asymmetric multiquantum well structure at various temperatures experimentally. The activation energy is calculated by using ... -
The investigation of the effect of thermal treatment on bentonites from Turkey with Fourier transform infrared and solid state nuclear magnetic resonance spectroscopic methods
(Pergamon-Elsevier Science LTD, 2012)There is a great deal of interest in the building industry in burned clays for production of building materials. Therefore, the effect of heat treatment on natural bentonite from Turkey was investigated by Fourier transform ... -
Optical CCD photometry and Rosat X-ray spectral analysis of the shortest period CV EI Psc (1RXS J232953.9+062814)
(Elsevier Science BV, 2009)We present here the optical observations of EI Psc (1RXS J232953.9 + 062814) through Turkish National Observatory (TUG) with RTT150 cm Russian-Turkish joint telescope and its X-ray observation using the ROSAT archival data. ... -
Structural transformations of TiO2 films with deposition temperature and electrical properties of nanostructure n-TiO2/p-Si heterojunction diode
(Elsevier Science Sa, 2014)Titanium oxide (TiO2) films have been deposited on p-Si substrates by sol-gel method using spin coating technique. Structural and morphological properties were studied as a function of deposition temperatures by X-ray ... -
Effect of ambient temperature on electrical properties of nanostructure n-ZnO/p-Si heterojunction diode
(Academic Press LTD- Elsevier Science LTD, 2012)The nanostructure n-ZnO/p-Si heterojunction diode was fabricated by sol-gel method. The structural and morphological properties of the nanostructure ZnO film have been investigated. The X-ray diffraction spectra indicated ... -
Mapping of Heavy Metal Contamination Characteristics Using Ciaprg Methodology
(Corvinus University Budapest, 2016)The aim of this study is to produce a digital contamination map which is interactively rectified with a database, projected and scaled. For this reason, a detailed investigation was conducted for an understanding of ... -
Sol-gel derived zinc oxide films: Effect of deposition parameters on structure, microstructure and photoluminescence properties
(Academic Press LTD- Elsevier Science LTD, 2011)ZnO films were prepared by sol-gel method and deposited onto glass substrates with spin coating system. XRD patterns and FESEM analysis were used to investigate the effect of deposition parameters such as spin speed and ...