Materials Literature
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Abstract—In this article the details of Erbium doped Fiber Amplifier (EDFA) in presence of Silicon nanocrystal (Si-Nc) is investigated. In this analysis Si-Nc and Er ions in matrix of fiber are assumed two and five levels respectively. For this structure rate equation for transient and steady state analysis is conside…
The synthesis and electrical characterization of La 1-x Sr x Mn 0.5 Cr 0.5 O 3 compounds are reported.These compounds, with perovskite structure, have been pointed out as a promising alternative for the nickel-based cermet anode of solid oxide fuel cells.Polycrystalline samples, with x = 0.3, 0.4, and 0.5, were prepar…
The bleaching performance of raw and acid activated Yola montmorillonite clay was studied. The bleaching performance was enhanced upon activation. The predominant active sites on the raw clay are Lewis acid sites, those on the improved clay are Bronsted acid sites. The best bleaching per- formance was obtained with cl…
Carbon nanotubes are a novel class of nanomaterials that have great potential in the field of biomedical research. This study investigates the cytotoxic effects of functionalized single walled carbon nanotubes (SWNTs) at different concentrations on a colon cancer cell line. Colorectal cancer cells were exposed to sing…
A novel method to one-pot-synthesize high-quality In(2)O(3)@In(2)S(3) core-shell nanoparticles, consisting of a step of reducing In(2)O(3) core surface into a layer of active indium metal in high-temperature organic solution and a step of converting this layer to In(2)S(3) using CS(2), has been developed.
Aluminum white dross is a valuable material principally due to its high metallic aluminum content. The aim of this work is to develop a method for quantitative analysis of aluminum white dross with high accuracy. Initially, the material was separated into four granulometric fractions by means of screening. Two samples…
This investigation proposes a novel, simple, and quick technique for fabricating ZnO nanoflakes and nanowire-based photodetector devices. High-density ZnO nanoflakes and nanowires were synthesized on a glass substrate by localized oxidation at a low temperature of 300 ° C . The synthesized ZnO nanoflakes and nanowires…
Conversion coating by immersion in solution including Mg(NO3)2 and/or La(NO3)3 was applied to commercial Mg alloys: AZ31, AZ61, AZ91 and AM60. The formed layer was analyzed, and the corrosion resistance of the specimen against salt water was investigated. The influences of the coating conditions on the characteristics…
Near infrared (NIR) upconverters only emit at a single visible wavelength; coating them with quantum dot multilayers allows the emission wavelength to be tuned across the visible spectrum.
Two different soot samples were produced by acetylene pyrolysis at 1100 °C using 50 000 ppmv(soot A) and 5000 ppmv (soot B) initial acetylene concentrations. Both soot samples exhibited different properties. Soot A presented a lower BET surface area, higher C/H ratio, and larger particles than soot B. At 1100 °C, soot…
Carbon layers are formed when gold oxide reacts under mild thermal conditions with molten aliphatic polymers such as polyethylene. This formation of carbon at relatively low temperature from chemically resistant polymers by addition of gold oxide to the polymers was unforeseen.
The effect on performance of a solid oxide fuel cell-micro gas turbine (SOFC-MGT) hybrid system on mixing or replacing natural gas, the normal fuel of such hybrid systems, with biomass gasified fuel (biofuel) was studied. It was found that the efficiencies of the SOFC module and of the hybrid system noticeably decreas…
Stress relaxation and viscous flow of GexSe1-x and TAS chalcogenide glasses were studied using the "bending method". Inadequacy of common models or functions to describe relaxation process of inorganic glasses were proved and the origin of an unexpected relaxation behaviour is discussed. Even if most part of the stres…
ZnO nanowall networks with a honeycomblike pattern on GaN/sapphire substrates were deposited by metalorganic chemical vapor deposition (MOCVD) without using any metal catalysts. The effects of growth temperature and VI/II ratio on the surface morphology and optical properties of ZnO nanowall networks were investigated…
Abstract A nanostructured manganese dioxide electrode material was prepared using a solid‐reaction route starting with MnCl 2 ·4H 2 O and NH 4 HCO 3 , and its electrochemical performance as a positive electrode for MnO 2 /activated carbon hybrid supercapacitor with 1 mol·L −1 LiOH electrolyte was reported. The materia…
The biosynthetic route of the pyrimidine moiety of thiamin is different in prokaryotes and eukaryotes. In prokaryotes, the pyrimidine moiety is synthesized from aminoimidazole ribonucleotide, an intermediate of purine biosynthesis, while in eukaryotes, we have reported that the N-1, C-2, and N-3 atoms of the imidazole…
We investigated the use of Ba2TiO4 to remove CO2 from a flow gas at high temperatures. Experiments using a CO2/N2 gas and a vertical reaction tube showed that the CO2 concentration of the exit gas can be reduced to 1% or less at 500 to 800°C (and to even 0.1% or less at 600°C) when the space velocity (SV) of the flow…
Metal silver rods having a partly regular direction on the substrate are synthesized from the fine copper particles on acrylic plastic plate immersed in 50 μ M‐PVP and 0.1 M‐AgNO 3 aqueous solution. An increase of PVP concentration in the AgNO 3 aqueous solution inhibits the growth of the string‐shaped silver and dend…
Le traitement traditionnel de l’ulcere de Buruli (UB) au Benin se fait principalement a base de plantes. L’enquete ethnobotanique menee aupres de 17 tradipraticiens dans la commune de Ouinhi (departement du Zou) a repertorie 49 plantes differentes utilisees pour traiter cette maladie. Deux de ces plantes presentent un…
Imidization and carbonization behaviors of various aromatic polyimide films synthesized from an anhydride with different diamines were investigated by FTIR and TG/DTG methods. Imidization of poly (amic acid) s with pendant -CH3 and-CF3 groups directly bonded to phenyl ring required long times for curing at 300°C. Pyro…