Materials Literature
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Due to an increased concern about the global energy crisis and environmental pollution, microbial fuel cells (MFCs) have been a major focus for renewable energy production. To date, however, a surprisingly small number of bacterial strains and their optimal growth conditions have been investigated for use in MFCs, rev…
Low-temperature synthetic methods (the molecular layering and pyrolysis of a liquid aerosol) for the nanostructured oxide films for the gas sensors based on zirconium dioxides and rare earth element (Ce, Y, and Tb) oxides sensitive to the oxygen-impoverished media and ozone have been suggested. It has been shown that…
Amorphous calcium phosphate (ACP) plays an important role in the body and can be used as an intermediate phase for forming calcium phosphates. All ACPs are thermodynamically unstable compounds, unless stored in dry conditions or at low temperature (-18oC), and spontaneously undergo transformation to crystalline calciu…
The surface texture is compared for silicon oxide and cerium oxide films obtained by oblique laser deposition at identical angles and deposition rates. This paper discusses how the crystallization tendency of the oxides affects the structure and relief of the deposited film—the length and tilt angle of the resulting c…
Dynamic light scattering has been employed to study the coagulation kinetics of colloidal dispersion of nanocrystalline cellulose and SKS-27 ARK synthetic latex under the action of sodium chloride. It has been found that, when a system being coagulated is exposed to a mechanical action, aggregates almost cease to grow…
The cyanogen bromide-resistant proteins of lamprey cartilage are biochemically related to the mammalian elastic protein, elastin. This study investigates their mechanical properties and enquires whether, like elastin, long-range elasticity arises in them from a combination of entropic and hydrophobic mechanisms. Branc…
For the design of reliable light sources based on light emitting diodes (LED) efficient accurate testing is required. An innovative sensitive test method is developed to detect and distinguish failures in LED modules. The method, i.e. measurement of the relative thermal resistance, is based on transient thermal analys…
In this work, a Zr-Cr oxide conversion coating was formed by a conversion process to improve the corrosion resistance of 5052 aluminum alloy BBPs. The main contents of the conversion coating included Zr, Cr and Si oxide, and the thickness of conversion coating was approximately 100 nm. The thin conversion coating exhi…
Topology optimization for structural design is a special type of problem in the optimization field. Although there are efforts to apply classic optimization techniques, the particularities of topology structural optimization have given birth to dedicated, more efficient and reliable methods. This paper is intended as…
Unlike traditional biocide-based antifouling coatings, emerging antifouling concepts combining environmentally benign materials and biomimetic concepts may require new antifouling assay methods for evaluating activity before the transition from lab to dynamic field test environment. As a result, many new antifouling a…
This paper reports on the compounds identified in the leaf and flower essential oils obtained by hydrodistillation of Plumeria alba L. (Apocynaceae) grown in Nigeria. The chemical analysis of the essential oils was achieved by means of gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC-M…
Consider an electromagnetic wave propagating in the empty space between two parallel metal plates. This situation is often the first example of guided waves encountered by undergraduate students since the solutions (the guided modes) are analytic and easily obtained. And yet, this seemingly simple configuration can gi…
Metallic nanowires with low resistivity were grown inside insulating aluminum oxide matrices that contained very uniform columnar nanopores (10.6+/1.7 nm diameters). These nanopores can be made with large-scale order (cm2), which is desirable in applications such as hard drive read sensors and random access memories.…
The modified Arrott plot method was used to analyze magnetic-field dependences of magnetization, M(H), for two polycrystalline samples Pr1-xSrxCoO3with x = 0.4 and 0.5. The analyses determined the values of critical parameters TC≈ 204 K, β = 0.654 ± 0.016, y = 1.11 ± 0.009, and δ = 2.70 ± 0.009 for x = 0.4, and TC≈ 21…
Abstract UV-curable electromagnetic shielding composite films (UV-EMSF) were prepared with graphene oxide/polyurethane-acrylate (GO-PUA) oligomers, different diluents (styrene-butyl acrylate or tripropyleneglycol diacrylate-butyl acrylate or trimethylol propane triacrylate-butyl acrylate) and photoinitiator (2-hydroxy…
Magnetization processes were investigated by employing magnetometry and magnetic domain imaging using magnetooptical longitudinal and polar effects in Fe60Al40films of 40 nm thickness. The films were initially chemically ordered and weakly ferromagnetic, and a large increase in the saturation magnetization was achieve…
A reconfigurable THz Yagi antenna based on hybrid model combining graphene and metal is proposed. Based on this hybrid model, we designed a Yagi antenna whose radiation pattern can be reconfigured by changing the applied voltage on the parasite graphene elements.
OBJECTIVE: The purpose of this study was to investigate the effects of piroxicam co-administration with ethanolic stem-bark extract of Khaya senegalensis on biomarkers of oxidative stress and gastro-toxicity in Wistar rats. MATERIALS AND METHODS: Thirty healthy male and female Albino Wistar rats (190-220 g) were group…
The first European occurrence of slawsonite is reported from a picrite sill within Upper Ordovician strata of the Prague Basin near the village of Rovina, Czech Republic. The rare slawsonite forms an interstitial phase in association with abundant celsian and hyalophane, replacing the original calcic plagioclase (byto…
The technical specifications of a thermal tomographic unit are described and the experimental data on tomographic analysis of impact damage in carbon fiber-reinforced plastic are reported.