Materials Literature
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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…
Light orbital angular momentum (OAM) has been recognized as a new promising resource for classical and quantum information applications. In contrast to the spin angular momentum, the OAM is an inherently multidimensional. Thus, the information can be encoded in the higher-dimensional OAM alphabets. Recently, Marrucci…
L(+)-lactic acid is a commonly occurring organic acid. It is widely used in the food and food-related industries, and has the potential to be used for the production of biodegradable polymers, solvents and oxygenated chemicals. Lactic acid can be produced by both bacteria and fungi, however it is currently produced fr…
A surface dielectric barrier discharge (SDBD) reactor provides a homogeneous plasma\nover a large surface area. This allows surface treatments of foils, textiles or fibers. Here we present results of a study to characterize the AC and pulsed performance of SDBD with regard to ozone production, equivalent electrical mo…
Ramea is a small island in southern Newfoundland. Since 2004, it has a wind-diesel hybrid power system to provide power for approximately 600 inhabitants. The average wind energy contribution to the total supplied load is less than 10%. Newfoundland and Labrador Hydro with the support of ACOA has upgraded the Ramea hy…
An important question in power utility is the estimation of additional heating of power transformers due to indoor placement. This depends dominantly on the size, type and position of ventilation jalousies, through which the air enters and exits the room. The heat transferred from the transformer cooling surfaces to t…
An attempt has been made to investigate the various parameters affecting the fluid behaviour, partially filled in a rotating cylinder. When the cylinder is rotating at 'high' speed, a liquid forms a hollow cylinder. Different patterns are observed in the fluids for the rotatioal speeds below a critical speed. This stu…
This paper documents a technical feasibility study opf tannery wasterwater which was reclaimed (treated) and reutilized in tannery leather making processes. The studied waste water was processed in the waste water treatment plant owned by Igualada tanners (IDR), in Spain. The objectives included reduction of city fres…
study presents research results of the influence that refining and transfer of AlSi12S alloy on the porosity of high pressure die- castings. Tests were conducted under production conditions of Die-casting Foundry META-ZEL Sp z o.o. The operation of refining was conducted in a melting furnace, with the use of an FDU Mi…