Materials Literature
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We report on basic wet-etching solutions for (GST) phase change material. A scanning electronic microscope was used to observe the surface morphology and measure the etching rate. On the basis of the etching results, it was found that the aqueous solutions of 10 vol % plus 25 wt % bases, such as KOH, , and tetramethyl…
The initial oxidation behavior of Ni-6.5Co-17.8Cr-3.7Al-0.5Y alloy is investigated at 800°C-1000°C. X-ray diffraction results show that the dominant Cr2O3 phase and secondary α-Al2O3 and NiO phases are observed on the surface of samples at all initial stages (oxidized for 16 hours). YAlO3 and θ-Al2O3 can only be detec…
Upon absorption of a photon, the bound 11-cis-retinoid isomerizes to the all-trans form resulting in a protein conformational change that enables it to activate its G protein, transducin, to begin the visual signal transduction cascade. The native ligand, 11-cis-retinal, acts as an inverse agonist to both the apoprote…
A simple estimation method for molar Gibbs free energy and enthalpy of formation for complex oxysalt minerals is proposed.Complex oxysalt minerals are divided into complex oxysalt minerals with water and complex oxysalt minerals without water.Complex oxysalt minerals without water can be considered as the composite of…
The requirement to install electronic power and control systems in high temperature environments has posed a challenge to the traditional limit of 125°C for high temperature exposure of electronics systems. The leap in operating temperature to above 200°C in combination with high pressures, vibrations and potentially…
The influence of combination of thermohydrogen treatment and plastic working of Ti-6Al-4V (VS6 Ru) titanium alloy on its microstructure and phase composition has been investigated
スズメバチの幼虫がマユを作るために吐くタンパク質の糸をホーネットシルク(以下 HS と略す)という．本研究は，HS を構成している複数種のタンパク質のアミノ酸配列を解明するとともに，各々のタンパク質の構造を比較して共通性を見いだすことで，異種タンパク質どうしの分子間の結合形態を明らかにすることを目的とした．とくに，α ヘリックス分子鎖どうしを結合させる超二次構造(コイルドコイル構造)の存在と，コイルドコイル構造が HS の繊維化機構や物性に与える影響を解明することに主眼を置いた．HS を構成する 4 種類の主要なタンパク質のアミノ酸配列は，4 種間で相同性が低いにもかかわらず，分子鎖中央付近が Ala リッチ領域，分子鎖両末端付近…
This paper proposes to develop an experimental program to characterize the type and the development of damage in composite with complex microstructure. A multi-scale analysis by acoustic emission has been developed and applied to hemp fibre woven fabrics/epoxy composite. The experimental program consists of tensile te…
xV2O5–(50-x)CdO–50P2O5 (0 ≤ x ≤ 50 mol%) glasses were prepared and investigated using DSC, IR spectroscopy and Raman spectroscopy. For low concentrations of V2O5 (x ≤ 20 mol %), the formation of P–O–V bonds increases the crosslink strength of the glass network and leads to increased Tg. For x > 20 mol%, the infrared a…
The kinetics of polarization of nanocomposites based on magnetite nanoparticles and polymer matrices (collagen and polystyrene) in an electric field was studied. The polarization and depolarization times of magnetite nanoparticles were determined. The dependence of the maximum electric dipole moment of magnetite nanop…
The electrical resistivity ρ and thermopower S of metallic ferromagnets CuCr 2 X 4 (X=S,Se or Te) are measured at low temperatures and in an external magnetic field of 1.5 Tesla. These properties are dominated by strong scattering effects in their ferromagnetic phase, resulting in (a) ρ(T) ~A T 2 dependence with very…
During manufacturing or service conditions, adhesively bonded composites are often subjected to impact. This impact may result in a reduction in strength and structural integrity of engineering components that are composed of adhesively bonded composite structures. The investigation of the degradation of strength of s…
Iron aluminides (Fe3Al) based composite with different amounts of multi-walled carbon nanotube (MWNT) have been prepared by using spark plasma sintering. Effect of MWNTs content on the mechanical properties was investigated. The compressive yield strength and fracture toughness of the 3 vol% MWNTs–Fe3Al composite, com…
Solid hydrogenic pellets are used as fuel for fusion energy machines like the ITER device. This paper discusses the numerical modeling of a Pellet Production System (PPS) that is used to generate these pellets. The PPS utilizes a source of supercritical helium to provide the cooling that is necessary to precool, lique…
The degradation of SiCr-based thin-film resistors under current and temperature stress and the Joule heating in the resistors are experimentally investigated to set current limitation design rules. Degradation mechanisms, the failure modes, and the impact of the stress test on Temperature Coefficient of Resistance (TC…
Pt nanoparticles were photocatalytically deposited onto TiO2 to improve the photocatalytic remote oxidation activity. Among the conditions examined, deposition from 1–3 mM H2PtCl6 solution for 2–10 s gave the highest activity. Further deposition resulted in reduced activities, possibly due to overgrowth of the Pt nano…
L-arginine acetate (LAA) single crystal is an interesting nonlinear optical and dielectric material. In order to understand the effect of some impurities (both inorganic and organic) on the electrical properties of LAA, we have grown from aqueous solutions pure and impurity (NaC/KCl/glycine/urea) added single crystals…
This work is devoted to experimental study of the effect of manganese concentration on thermoluminescent properties of YAlO3:Mn crystals grown by the Czochralski method. A new type of emitting centers beside of Mn 4+ and Mn 2+ ions was revealed at low concentration of manganese ions in the crystal. These centers are r…
アルカリ環境での鋼中の水素侵入挙動について，水素量と水素過電圧の観点から水素透過試験法および昇温脱離法にて調査した．NaOH溶液およびCa(OH)2溶液ともに水素透過電流密度は印加電流密度の1/2乗に比例した．また，NaOH溶液よりもCa(OH)2溶液での水素侵入量が大きかった．これらの結果は，LillardとScullyによる実験結果と一致した．アルカリ環境にて鋼中に水素が侵入できる臨界の水素過電圧は0.05 Vであった．本浸漬試験環境における最も卑な電位は－0.6 V（SCE）であり，この環境では鋼中に水素は侵入しなかった．アルカリ環境でも酸性および中性環境と同じように，水素透過係数の対数と水素過電圧の間には直線関係が成り立つ…
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