Materials Literature
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In this study the role of PEG and PEO-PPO-PEO block copolymers molecular weight in precipitation of calcium carbonate was examined. The CaCO3 particles were characterized by FTIR spectroscopy, X-ray, SEM and particle size distribution analysis. In absence and presence of modifiers, mixing of the reagents led to the fo…
Micro-mesoporous hybrid materials of ZSM-12/MCM-41 type with different micro- and mesoporosity contributions were prepared by a procedure that uses the desilication of the zeolite in an alkaline medium, followed by recrystallization onto the mesostructure, where the zeolite is used as the silica source in the formatio…
The unprecedented and continuing increase in the computational power and functionality of microelectronic devices, extending beyond more-than-Moore, are driven by the ever shrinking dimensions of logic and memory circuits, now numbering over a billion and half, all packed into an area of ∼15 cm2. As the costs of these…
Ultrasonic velocity (u), density (ρ), viscosity (η) were measured for glycine at different concentrations . The experimental data was used to calculate acoustical parameters like adiabatic compressibility (β),freelength (Lf),free volume (Vf), internal pressure (πi),acoustical impedence (z) and relaxation time (τ). The…
Colloidal unimolecular polymer (CUP) particles were prepared by the process of water reduction on copolymers containing hydrophobic and hydrophilic monomers at definite ratio using free radical polymerization. The CUPs are formed by the effect of hydrophilic /hydrophobic interactions of the polymer with a change in th…
This short review focuses on an extended study of synthetic oligomericphenyleneethynylene (OPE) electrolytes that have been investigated for both their antimicrobial activity and their fluorescence sensing properties. In both cases, interfaces between these synthetic electrolytes and naturally occurring materials such…
Surface treated jute accomplished by chemical treatments which enhanced the adhesion between polyester resin and modified surface within the composite. Baking time for 6 hours also reduced the moisture content and diminishes the hydrophilic properties of the corchorus olitorius jute fiber. Montmorillonite shell type n…
In this paper we report on the optimisation of the optical characteristics of 2D-arrays of plasmonic gold nanoantennas (NA) that can be used as high sensitivity mid-infrared spectroscopic sensor for the detection of chemical/biological substances by using the Surface Enhanced Infrared Absorption (SEIRA) technique. Thi…
We investigate the usage of graphene plasmonics for light trapping in optoelectronic devices which can enhance the absorption in surrounding materials by tens of times along with electrical tunability.
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セメントコンクリート再生路盤材からは六価クロムが溶出する可能性があるため，溶出の確認が行われるようになっている．これに伴い，六価クロム溶出低減技術も開発されるようになっているが，還元物質を用いる対策の場合，JISの分析法を用いることができず，評価が難しいのが現状である．本研究では，独自に開発した還元物質共存下でも容易に六価クロムを分析できる方法を用いて，自然由来の物質や入手が容易な物質の中から，還元効果が期待できる物質を選定し，六価クロムの溶出低減効果を検討した．その結果，比較的入手が容易な一部の果汁や還元糖の中に六価クロム溶出低減効果が高いものがあることを把握した．
In order to gain insight for developing fine-grained magnesium alloy materials through plastic deformation, Mg-Zr, Mg-La, and Mg-La-Zr alloys, prepared from pure magnesium and lanthanum metals, and a Mg-33Zr master alloy were tensile tested at room temperature and 150ºC. The microstructures were examined by optical mi…
The present work summarizes recent progress in the investigation of nanoscale microstructure effects on hydrogen behavior in rapidly solidified aluminum alloys foils produced at exceptionally high cooling rates. We focus here on the potential of modification of hydrogen desorption kinetics in respect to weak and stron…
We present a detailed multiphysics model capable of simulating the dynamic behavior of a solid oxide fuel cell (SOFC). This model includes a description of all the important physical and chemical processes in a fuel cell: fluid flow, mass and heat transfer, electronic and ionic potential fields, as well as the chemica…
Heating by solid fuels, and especially fi re wood, belongs to the most asked and requested types of heating in cottages. One of the main problems of heating is wood splitting as a fi rst operation. A very useful tool for splitting of wood material is a log splitter. This contribution is focused on how to apply a screw…
塩素固定化材および膨張材を低熱セメントに添加することで、水和物としてエトリンガイト、モノサルフェートおよびハイドロカルマイトが生成した。また、それらの生成量にはSO3/Al2O3モル比に応じた差が認められた。塩素固定化材と膨張材を添加したセメント硬化体を塩水浸漬した場合、硬化体が緻密化し、塩化物イオンの拡散が抑制された。これは、フリーデル氏塩の生成により塩化物イオンを固定化した化学的な作用と、細孔量を減少させる物理的な作用によるものと考えた。また、セメントの種類によって効果が異なり、低熱セメントは普通セメントと比較して塩素固定化材および膨張材の添加による中性化抵抗性と耐塩性の効果が小さいことが確認された。
В. А. Ковалев
Continuous lasers have been extensively used for macroscopic metal sheet forming. However, for the manufacturing of micro–mechanical systems, the applicability of such type of lasers is limited by the long relaxation time of the thermal fields responsible for the forming phenomena, what makes the generated internal re…
NiO Nanoparticles (NNP) were synthesized by a self propagating high temperature synthesis from nickel nitrate. Synthesized NiO are used to prepare Polyaniline (PANI)-NiO nanocomposites by in situ chemical oxidative polymerization at 0–50C. Different weight percentages of NiO (10%, 20%, 30% and 40%) were added during t…