Materials Literature
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Na5[CuO2](OH)2 has been obtained as orange single crystals from mixtures of NaOH, Na2O and Cu2O in sealed Ag containers. The crystal structure has been refined from X-ray diffraction data (IPDS data, Pnma, Z = 4, a = 607.4(1) pm, b = 891.2(1) pm, c = 1201.0(2) pm, R1 = 0.03). The characteristic unit is the bent [CuO2]…
13C hyperfine structure associated with the OK1 centre found in type Ib natural diamond has been identified and the 13C hyperfine parameters have been determined. Implications of the results for the electronic structure of OK1 are discussed. ESEEM spectra for the N3 centre are also presented. The results are in good a…
Three-dimensional thermoluminescence (TL) spectra of MgAl2O4 spinel exposed to UV light showed a TL peak with a 710nm emission band at 472K and another peak with 520nm around 490K. The algorithm of the numerical analysis based on the model of 2 recombination centers had been developed for TL glow curves of MgAl2O4. Th…
In one of the stages of the gelatin production process, a highly concentrated solution of gel is cooled and extruded to form gelatin noodles, which are then laid on a drying belt. Gelatin is a molecular colloid that is not porous under these drying conditions, and as a consequence, water migration occurs solely by dif…
Plasma diagnostic and fusion reactor control systems will need Windows which transparency is unchanged under irradiation. To choose suitable window material for the visible light and to define the influence of irradiation on its properties, the investigations in different countries have been performed. In this paper t…
The world's oceans cover 70% of the surface of our planet. The photosynthetic organisms living within its photic zone are responsible for about one-half of global primary productivity. The most successful organisms are thought to be photosynthetic prokaryotes (cyanobacteria and prochlorophytes) and a class of eukaryot…
The ability of the SRB Desulfovibrio desulfuricans to colonize aerobic heterotrophic or nitrifying biofilms on stainless steel surfaces was investigated by fluorescence in situ hybridization (FISH) in combination with confocal laser scanning microscopy (CLSM), the polymerase chain reaction (PCR) directed to the dissim…
Photoaddressable polymers (PAPs) are side-chain copolymer systems functionalized with azobenzene chromophores and mesogenic side groups. They show very large birefringence values after illumination with polarized light. The molecular mechanisms involved are photoinduced isomerization cycles of the azo side groups, whi…
In this work, several important problems related to the fabrication of ultrafine grained UFG alpha+beta titanium alloys have been investigated, taking Ti-6.5Al-3.3Mo-1.8Zr-0.26Si wt- as the model material. It has been shown that UFG titanium alloys can be produced by deformation at relatively low temperatures or high…
Size and crystallinity controlled silicon nanoparticles were prepared by a laser ablation, in situ annealing and mobility size-selection with a differential mobility analyzer (DMA). The shape and crystal structure of generated particles were observed by a transmission electron microscopy (TEM). Both densification of a…
Zinc pigments corrode in aqueous alkaline paint media (e.g., waterborne anticorrosive paints) with the evolution of hydrogen. Paint resins inhibit this corrosion reaction at a pH value of 8 more effectively than at pH10. An increase of resin addition effects a decrease of hydrogen evolution (i.e., corrosion inhibition…
In this paper, studies were conducted on the effect of borehole size on explosive energy loss in rock blasting. Since most industrial explosives are nonideal ones, the charge size and the confinement condition have significant impact on the detonation performance of these explosives. Analyses indicated that smaller bo…
The stress-strain behaviour of spunbonded needle-punched fabric, spunbonded heat-sealed fabric and staple fibre needle-punched fabric has been studied using wide-width tensile test method. The stress-strain behaviour of constituent fibres of these fabrics has also been studied and the structural parameters of nonwoven…
The sol-gel process was applied for the preparation of neodymium (Nd3+)doped silica gel derived glasses. Two different procedures have been studiedusing two different precursor materials, Tetramethoxy-silane (TMOS) andTetraethoxy-silane (TEOS), giving silica gel and silica doped with Nd3+ of typeI and type II, respect…
In the present work the observation of the photorefractive effect in a cell filled with nematic liquid crystal under electric-field application is reported. Photorefraction is caused by formation of a spatial inhomogeneous charge distribution due to the Helfrich-Carr effect in the absence of light-excited charge carri…
Using a Lorentz-Drude model, we determine optical constants in the range from 300 to 1000 nm for CdIn(2)O(4) thin films deposited by rf reactive sputtering from the measurement of transmission and reflection. We discuss the effect of deposition conditions including substrate temperature and oxygen concentration in a r…
Nylon-6 chain extension by means of reactive processing in the presence of triphenyl phosphite (TPP) was investigated using an internal mixer coupled with a torque sensor. The molecular weight was dependent on TPP concentration, processing time, polymer drying conditions, rotational speed and processing temperature. T…
An experimental study of gas-phase combustion synthesis of silicon dioxide (SiO2) particles was conducted in C3H8/air and H2/air premixed flames. Two types of organosilicon compounds, HMDSO and HMDSA. were used as the silicon precursors of synthesis processes. The objective of this investigation was to study the effec…
The electrochemical behavior of Ti-Pd and Ti-6Al-4V alloys in 0.9% NaCl solution were studied by single triangular potential sweep, potentiodynamic polarization curves, and electrochemical impedance spectroscopy techniques (EIS). The complicated corrosion mechanism can be interpreted as at least one electrodissolution…
The results of Raman scattering studies of nanocrystalline CeO2 thin films are presented. The spectra have been described using the spatial correlation model from which the coherence length has been determined as a function of grain size. A direct comparison between the concentration of defects related to coherence le…