Materials Literature
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A simple, efficient and unique method has been developed for coating uniform, thin and continuous graphitic carbon shields (or carbon nanotubes) on CdS nanowires. As-coated CdS nanowires have a diameter of ∼80–200 nm and a length ranging from several to tens of microns, and graphitic carbon shields are as thin as seve…
The powder Cu-Al2O3 composites were produced by high-energy milling. Various combinations of particle size and mixtures and approximately constant amount of Al2O3 were used as the starting materials. These powders were separately milled in air for up to 20 h in a planetary ball mill. The copper matrix was reinforced b…
This paper summarizes the synthesis and properties of the materials based on the columbites A 1+x 2+ Nb 2 O 6+x ͑A 2+ = Mg, Co, Zn͒ in the vicinity of their stoichiometric composition.The evolution of the phase composition, microstructure, and microwave dielectric properties of the studied materials have been consider…
We analyzed along this work the feasibility to produce high quality alumina thin films by High Vacuum Chemical Vapor Deposition (HV-CVD). We study the influence of various parameters on the growth process and on the film quality, such as substrate temperature, gas flow or pressure. We aim to highlight the advantages a…
The purpose of this study is to evaluate the proliferation resistance characteristics for different fuel cycle arrangements in the context of a global nuclear energy system using a Markov approach, which is capable of modeling complex systems and providing probabilistic measures. A technique that groups a set of react…
Since both whey protein isolate and sodium caseinate are frequently used O/W emulsifiers of dairy origin, their emulsifying and emulsion stabilising properties have been determined at pH conditions that ressemble practical circumstances. In order to enable a quantitative evaluation, two 3-level experimental designs we…
Severe accidents in a Light Water Reactor (LWR) have been a subject of intense research for the last three decades. The research in this area aims to reach understanding of the inherent physical phenomena and reduce the uncertainties in their quantification, with the ultimate goal of developing models that can be appl…
This numerical study examines the combustion characteristics of premixed ammonia-air mixtures, with equivalence\nratios around stoichiometry, at elevated pressure and temperature conditions which are encountered in SI engine\noperations. The laminar burning velocity, the final flame temperature and species concentrati…
Carbon nanotubes (CNTs) have raised great interest in a number of applications, including field emission, energy storage, molecular electronics, sensors, biochips and drug delivery systems. This is due to their remarkable mechanical properties, chemical stability and biofunctionalizability. This nanomaterial is low in…
Systematic studies of magnetic, electrical, and thermal transport properties have been performed on a single crystal of La0.98Pb0.02Mn0.74Co0.25O3. From 5 to 500 K, the material system shows three distinct magnetic states, a low-temperature glassing state (from 5 to 185 K), a Griffiths-like ferromagnetic state (from 1…
Hybrid semiconductor‐metal nanoparticles monolayer of Cadmium Selenide and gold nanoparticles has been prepared, using Langmuir—Blodgett technique. The near field photoluminescence spectra from such monolayer films, shows red shift ∼75 meV with respect to CdSe QDs monolayer film and splitting ∼57 meV. The composite sp…
Se presenta la evaluación de magnetitas sintetizadas bajo diferentes condiciones reportadas en la literatura y con algunas modificaciones, su influencia en la pureza y en el tamaño de partícula de los óxidos obtenidos. Las muestras se caracterizaron mediante espectroscopía Mössbauer a temperatura ambiente, análisis po…
In this study, the syntheses of indolo[3,2-b]carbazole (INC) derivatives have been investigated, which possessed the planer and conjugated structure and showed the strong blue fluorescence by the irradiation of UV light. In order to improve the solubility of INC, N-alkylated INC derivatives were prepared by the reacti…
コンドロイチン硫酸/デルマタン硫酸が代謝される際の最初の段階では，エンド型の加水分解酵素によって多糖鎖が低分子化を受けると考えられている。しかし，この反応を触媒するコンドロイチン硫酸/デルマタン硫酸に特異的なエンド型の糖分解酵素はこれまでに見つかっておらず，ヒアルロン酸分解酵素であるヒアルロニダーゼが代わりに作用すると考えられてきた。線虫 Caenorhabditis elegans は多様な基本的生命現象を研究するうえで理想的なモデル生物であり，これまでに線虫を利用して，グリコサミノグリカンの生合成と機能に関する多くの研究が行われてきた。しかし，C. elegans におけるグリコサミノグリカンに関する代謝経路の研究は殆ど行われ…
In this work the various physical theories for multi‐component diffusion are critically reviewed by reexamining the underlying relations between these frameworks. The Maxwell‐Stefan equations for multi‐component diffusion are re‐derived by using sound principles of non‐equilibrium thermodynamics. It is believed that t…
Gas diffusion electrodes (GDEs) promising to use electrochemical reaction of gases at higher rates such as in fuel cells were used for CO2 electro‐reduction. Cu powder, Cu and ZnO mixed powder, and CuO/ZnO mixed oxides were examined as the catalysts. The reduction products with Cu‐GDEs in K2SO4 aq. soln. were CH4, C2H…
Return voltage measurements of paper-oil insulations such as medium voltage cables have proven to be a reliable method to determine the actual state of degradation and/or the humidity of the insulation. As a first step, the interpretation of the measurements can be done based on the p-factor. This parameter is sensiti…
In the absence of scientific clarity regarding the potential health effects of occupational exposure to nanoparticles, there is a need for guidance in making decisions about hazards, risks, and controls (Schulte & Salmanca-Buentello, 2007). Presently, no guiding principles have been universally accepted for personal p…
Conjugates of methotrexate (MTX) and the nucleoside analogs 3-azidodeoxythymidine (AZT), iododeoxyuridine (IUdR) and dideoxycytidine (ddC) linked using poly(ethyleneglycol) are presented. In vitro cytotoxicity assays of the conjugates against drug resistant ovarian cell line A2780/AD are preformed and comparisons made…
The effect of recasting, up to two times, Ni-Cr (DUCINOX) prosthetic alloy on its corrosion properties was carried out. The corrosion measurements were done in deoxygenated Fusayama Meyer artificial saliva solution at temperature of 37°C. In the study following electrochemical methods were used: measurement of free co…