Materials Literature
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Raman scattering spectra of the RbMnCl3 crystal have been studied under ambient conditions and under high hydrostatic pressure. The results produced have been interpreted with the ab initio model. The experimental data agree well with the estimated values in the low frequency range and show a slightly worse agreement…
The dependence of characteristics of a stratified Luneberg lens on the layer parameters has been studied in numerical experiments using a mathematical model based on the rigorous solution of the electrodynamic problem of diffraction on a multilayer sphere.
Protein crystallization has been studied in presence or absence of buoyancy-driven convection. Gravity-driven flow was created, or suppressed, in protein solutions by means of vertically directed density gradients that were caused by generating suitable temperature gradients. The presence of enhanced mixing was demons…
The universal formulation of Urbach's rule in solids has been considered in terms of the single-phonon approach. The “crystalline” and “glassy” variants of this rule, which are obtained on the basis of different ratios of contributions from the dynamic and static types of disorder, have been discussed with using some…
This study reported in this paper was aimed at testing the shear cell that was developed for the satellite mission Foton-M1 to measure diffusion coefficients in liquid metals under microgravity (microg)-conditions. Thick Layer diffusion experiments were performed in the system Sn90In10 versus Sn under 1 g-conditions.…
Thermoluminescence characteristics of two subsidiary glow peaks, one below 100°C and the other above 300°C, have been studied for measurements between 30°C and 500°C in α-Al 2 O 3 :C. The thermoluminescence Intensity of thelower temperature peak decreased with storage with a half-life of about 150 s. In contrast, the…
We present a model of the phytoplankton dynamics. The distribution of the size of the phytoplankton aggregates is described by a non-linear transport equation that contains terms responsible for the growth of phytoplankton aggregates, their fragmentation and coagulation. We study asymptotic behaviour of moments of the…
Two oxy-cuspidine series, RE 4 (Ga 2 O 7 )O 2 (RE = La, Nd, Sm) and La 4 (Ga 2 - x Ge x O 7+ x /2 )O 2 ( x = 0.2, 0.4, 0.6), have been prepared as single phases. The room-temperature crystal structures have been determined from joint Rietveld refinements of neutron and laboratory X-ray powder diffraction data for La 4…
Liposomes, which are vesicles composed of a phospholipid bilayer surrounding an aqueous milieu, represent a new strategy for anticancer drug delivery. Extravasation and accumulation of liposomal drugs within neoplastic tissues are possible because of the leaky vasculature and scarce lymphatic vessels of tumours (the e…
Precursor nanoparticles of complex lanthanide phosphors with binary and ternary composition are made using the inverse miniemulsion process. These particles show a high colloidal and compositional stability and are used to obtain inorganic crystalline films which can be very thin and highly homogeneous in topography a…
In order to investigate the mechanical relaxation behavior of the Zr 36 Ti 24 Be 40 amorphous alloy, the dynamic mechanical properties were measured using dynamic mechanical analyzer (DMA). From the data collected during isothermal multi-frequency dynamic mechanical measurements, the master curves for storage and loss…
The effect of different carbon sources (propionate, acetate, butyrate and glucose) on an enhanced biological phosphorus removal biomass developed with propionate as the sole carbon source was studied. Firstly, a group of different cycle studies was carried out using each substrate independently and then, another cycle…
The charging effect of an insulating specimen from electron beam (e-beam) irradiation may be utilized to facilitate imaging in the scanning electron microscope (SEM). This has been confirmed by a great deal of experimental work during the last three decades. Particularly, recent investigations indicate that even locat…
The most important use of rubber in tonnage amount is for tires and inner tubes. All tires of automobiles, trucks, buses, airplanes etc., are made from rubber due to its unique properties. Rubber is related to thermo-plastic-elastic materials and is turned to thermosetting on vulcanization during manufacturing of rubb…
Abstract An optimized set of thermodynamic functions to describe the Al – V system has been obtained by a computer-operated least squares method applied to the experimental phase diagram and thermodynamic data available from the literature. Special attention is paid to the modeling of the intermediate phase Al8V5. Bas…
We have performed a first characterization of the diffraction efficiency of gratings written in liquid-crystalline composite materials by the interference pattern of two curing beams. The grating fringes consist of polymer slices separated by films of continuous nematic phase. The dependence of the diffraction efficie…
Regulations regarding automotive diesel engine emissions become more severe every year, and it is difficult to meet the requirements with only combustion improvement techniques. More effective post-processing technology is desired especially for particulate matter (PM), such as carbon soots. Although the use of a cera…
The authors present a novel route for the preparation of monolithic carbons with a meso/macroporous structure by templating mesostructured silica monoliths prepared by using macroporous polystyrene foams as structure scaffolds. The carbon skeletal of these materials shows a well‐developed and well‐structured porosity…
In this study, the effect of polymer materials with different polarity, namely low density polyethylene (LDPE) and ethylene vinyl acetate (EVA), on the migration behaviour of alpha-tocopherol from active packaging was investigated. The antioxidant was also adsorbed onto silica materials, namely SBA-15 (Santa Barbara-1…
Cr concentrations of ∼2at.% were incorporated into AlN during growth by molecular beam epitaxy. Under optimized conditions, single-phase, insulating AlCrN is produced whose band gap shows a small (0.1–0.2eV) decrease from the value for undoped AlN (6.2eV), a decrease in a-plane lattice constant and the introduction of…