The breakthrough curves were measured for the adsorption of aqueous Pb(NO3)(2) on activated carbon fibers (ACFs) in a fixed-bed adsorber. With the adsorption equilibrium constant and the intraparticle diffusivity determined from separate experiments in a batch tank, the breakthrough curves were predicted by the orthogonal collocation method. By the...
Systematic measurements on Hall and longitudinal resistivities as a function of temperature in Hg1-xRe xBa2Ca2Cu3O8+δ (x=0.18) ceramic samples were effectuated. These measurements were performed in magnetic fields H=0, 10, 20, 40 and 50 kOe, applied perpendicularly to the transport current orientation. In the normal phase, the Hall coefficient is p...
Quasicrystalline Ti41.5Ni17Zr41.5 thin films have been synthesized at different temperatures by pulsed laser deposition (PLD) from a Nd:YAG laser. Electrical resistivity, Hall coefficient, magnetoresistance and thermopower measurements have been conducted in the 4.4–300 K or 70–300 K temperature range. Ti41.5Ni17Zr41.5 quasicrystals are characteriz...
The transport and magnetic properties of nickel (Ni) nanoparticles in the range 9-70 nm having a surface oxide layer of Ni or zirconium (Zr) have been studied. The oxide-encapsulated Ni has been prepared by chemical reduction of nickel and zirconium salts in an aqueous medium with sodium borohydride as a reducing agent. Both X-ray diffraction and t...
Published in Zeitschrift für Naturforschung A
The structural, dielectric and conductive properties of [(CH2)3(NH3)2]Cu(II)Cl4 have been studied. The material shows an order-disorder transition at T1 = (333±2) K and a ferroelectric phase transitions at T2 = (434±3) K. Results of differential thermal analysis, infrared spectroscopy, X-ray diffraction, AC conductivity and permittivity measurement...
A Schottky structure is fabricated using CuPc sandwiched between fluorinated tin oxide (FTO) and aluminium electrodes. The electrical properties of the device are measured at room temperature. Permittivity of the device is calculated from capacitance measurements. The saturation current density, J(0) = 5.1 X 10(-4) (Amp/m(2)), diode ideality factor...
Published in Zeitschrift für Physikalische Chemie
Selected results on the spatiotemporal behaviour of equilibrium and nonequilibrium properties of ferrofluids in different magnetic fields are reviewed. They have been obtained in the project B13 Transport, response and instability behaviour of ferrofluids of the SFB 277 by experiments and by various theoretical methods ranging from purely analytica...
Published in Korean Journal of Chemical Engineering
An imprinted polymer membrane (IPM) with blending trimethoprim-MIP and polysulfone (PSF) was prepared by bulk polymerization and membrane preparation. In the process of the preparation, the influencing factors on membrane structure and properties, such as the concentration of PSF, the content of additive polyethelene glycol (PEG) and TMP imprinted ...
We briefly explain the consistency conditions imposed on the effective holographic theories, which are parameterized by two real exponents $(\gamma,\delta)$ that control the IR dynamics. The general scaling of DC resistivity with temperature at low temperature and AC conductivity at low frequency across the whole $(\gamma,\delta)$ plane are explain...
