Showing papers in "Physics Procedia in 2009"

TL;DR: In this paper, the chitosan-Cu (II) complex was synthesized and characterized, and the effect of the coordinating bond effect on its antibacterial activity against Salmonella enteritidis was investigated.

TL;DR: In this article, a small amount of silica was added to the catalysts to suppress the crystallization of ZnO contained in catalysts, which suppressed the long-term stability of Cu/ZnO-based catalysts during methanol synthesis.

TL;DR: Gadolinium isopropoxide was studied as a possible dopant for styrene-based plastic scintillators as a convenient and inexpensive method to produce high-efficiency thermal neutron detectors as discussed by the authors.

TL;DR: In this article, a dilatometric analysis was performed on a Pyrex type borosilicate glass and the results showed that the thermal expansion variation with temperature is essentially non linear, increasing rapidly up to 200 ∘ C and slowing down beyond.

TL;DR: In this paper, pure Na-A (LTA) zeolite has been prepared from aluminosilicate gel obtained by a mixture of metasilicate and aluminate solutions.

TL;DR: In this article, the effect of ammonia treatment in field natural rubber (NR) latex with different storage period time on the properties of concentrated NR latex and stability of skim latex was investigated.

TL;DR: The current status of the theory of formation of the so-called J-band (Jelley, Scheibe, 1936), an abnormally narrow, high-intensity, red-shifted optical absorption band arising from the aggregation of polymethine dyes, is discussed in this article.

TL;DR: In this paper, the ab initio full potential linearized augmented plane wave (FP-LAPW) method within density functional theory was applied to study the structural and electronic properties of the compounds SrS, SrSe, SrTe and their alloy SrS1−xSex in the NaCl structure.

TL;DR: In this paper, the authors deal with the elaborated of NaA and faujasite NaY solid materials according to a hydrothermal crystallization of amorphous gels composed of solutions of silicon, aluminum and sodium.

TL;DR: In this article, the acid leaching operating conditions allow us to obtain a recovery uranium rate of 93% and the uranium concentration of the pregnant solution is approximately of 1.2 g/l, which justifies the use of ion exchange resins to the concentration-purification of our pregnant solution.

TL;DR: In this paper, the first principle total energy calculation using FP-LMTO was presented for CaS, CaSe and CaTe, in the B1 (NaCl) and B2 (CsCl) phase, by means of accurate first-person total energy calculations using the all-electron full-potential linear muffin-tin orbital method.

TL;DR: In this paper, the microstructure of equal channel angular extruded (ECAE) 99.1% aluminium was investigated by X-ray diffraction (XRD) analysis, and it was found that the XRD peaks showed a significant broadening, which was related to grain refinement and lattice distortions.

TL;DR: In this paper, a gain medium and an interband cascade laser, a cascade amplifier, and an external cavity laser having the gain medium are presented, and a transition region is inserted at the interfaces between the various regions of the gain Medium so as to smooth out abrupt shifts of the conduction-band minimum.

TL;DR: In this article, a lignocellulosic natural residue which is a vegetation waste "stones of dates" of the south of Algeria was used for the characterization of activated carbon.

TL;DR: In this article, the structural, electronic, and thermodynamic properties of CdS1−xTex cadmium ternary alloy were investigated within density functional theory (DFT).

TL;DR: In this article, the application of burnishing treatment (ball burnishing) on XC48 steel and parameters optimisation of treatment regime was investigated. And an empirical model has been developed to illustrate the relationship between these parameters and superficial layer characteristics defined by surface roughness and superficial hardness.

TL;DR: In this article, the authors employed a sol-gel route to prepare 1% samarium-doped TiO 2 nanopowders and performed time-resolved photoluminescence (PL) and Raman characterization.

TL;DR: In this article, the effect of heat treatment on the plastic properties of an aluminum alloy (Al-Zn-Mg) has been investigated by indentation and tensile tests using optical, scanning and transmission electron microscopies.

TL;DR: In this paper, a medical gantry that focuses the beam from the beginning of a gantry to the exit of the gantry, independent of the rotation angle of the Gantry, keeps the beam achromatic and uncoupled, thus avoiding the use of collimators or rotators, or additional equipment to control the beam divergence.

TL;DR: In this paper, the effect of polyvinylpyrrolidone (PVP) on palladium nanoparticles was investigated using Fourier Transform Infrared Spectroscopy (FT-IR).

TL;DR: In this article, structural, magnetic and magnetocaloric effects of powder perovskite manganites La 0.7 M 0.1 MnO 3 (M=Sr, Ba and M′=Na, Ag and K) have been investigated.

TL;DR: In order to widen the industrial uses of Douiret sand belonging to the Chenini formation (Southern Tunisia) experimental investigations have been performed to synthesize the silica gel from the natural raw material using alkaline attack, which correspond to the fusion of silica and sodium carbonate together at high temperature (1060 ∘ C ).

TL;DR: In this paper, the photocatalytic degradation of some benzene derivatives over TiO2 (Phenol, Chlorobenzene and Toluene) in aqueous medium is compared to the reaction of the benzene.

TL;DR: In this article, the authors have analyzed the new emerging technologies in the field of photovoltaic (PV) and their impact on the finale cost of the solar cells and compared the two main groups of PV solar cells which are bulk silicon (Si) and thin-film.

TL;DR: The physical and mechanical properties of CrAlN coating on a silicon substrate and the effect of the aluminum proportion on their variation have been investigated in this paper, where the results demonstrate that variation in aluminum proportion alters the resulting columnar morphology, porosity and thermal properties.

TL;DR: In this paper, the authors studied the effect of doping of rare earth impurities on the properties of CaF 2 crystals and found that the order of ML and TL intensity for dopants was similar.

TL;DR: In this article, the effect of the incorporation of dunes sand and slag, finely ground on rheological and mechanical properties of reactive powder concretes containing ternary binders, was studied.

TL;DR: The photoluminescence spectrum of studied nanocomposite shows a large luminescence (from 1.8 eV to 3.2 eV) as mentioned in this paper.

TL;DR: In this paper, a study on the solid state diffusion bonding between zircaloy (Zy4) and stainless steel (304L) for an application in the sector of the nuclear power is presented.

TL;DR: In this paper, the results of the influence of the modification of a bituminous concrete on its mechanical behaviour have been presented, using laboratory tests by the addition of EVA (Acetate of vinyl and ethylene) and EVA-waste (waste of sole of shoes).