Materials Literature
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Conducting polymers are known to have significant electrical properties which can be improved by strong oxidizing power of oxidizing agents like V 2 O 5 . In the current study oxidative polymerization of the thiophene monomers was done to obtain Polythiophene for converting it into its composites with V 2 O 5 to study…
Nine years after the existence of resident Cardiac Stem Cells was first demonstrated, and despite the fact that we are right now evaluating the preliminary and promising results of the first phase I clinical trials, our understanding of the mechanisms responsible for cardiac regeneration is still partial and the abili…
Structural phase transitions of Li2MgSiO4 and Li2MgGeO4 at high temperature have been investigated by means of in situ high temperature powder XRD measurements. The monoclinic P21/n phase of Li2MgSiO4 shows a reversible phase transition to high temperature orthorhombic Pmnb phase due to the order-disorder of Mg and Li…
This paper presents development of an industrial motor with an amorphous winding core for large capacity applications. The motor is developed for establishing proper motor designs to apply amorphous cores to large capacity motors. The motor design and the test results of a trial motor are discussed in this paper. In t…
ホスホリルコリン(PC)基を含有する芳香族ジアミンモノマーを用い，可溶性芳香族ポリアミド，ポリアミド–エステルおよびポリウレタン–ウレアの合成を行った．ポリアミド–エステルおよびポリウレタン–ウレアでは，ソフトセグメントを形成するコモノマーとしてポリカーボネートジオールを用い共重合することで，溶媒キャスト法により自己支持性のある弾性フィルムを作製できPC基含有エラストマーが得られた．とくに，ポリウレタン–ウレアから作製したフィルムは，市販のポリカーボネートウレタンであるBionate®と類似した機械的性質を示し，PC基を導入してもポリウレタン特有の弾性を維持できることがわかった．さらに，得られたポリマーフィルムはタンパク質や血小板…
Corrosion of paint-coated steel exposed to marine environment is one of the serious problems and there are many researches related to such corrosion. Also it is recognized that the defect plays very important roles in such corrosion. Nevertheless, there are still few studies about the deterioration progress of paint-c…
Cryogenic structuralmaterials are an essential element to fulfill the performanceof superconducting coils for fusion reactors. In this field, there was no specialized steel and mechanical properties data at 4 K until 30 years ago when the Japan Atomic Energy Agency (JAEA) started the development of the Tokomak fusion…
Novel photo-functional naphthalenedithiol (NpDDT) as a linker molecule for formation of EuS nanocrystal assembles (EuS nano-assembles) has been reported. NpDDT is synthesized by the reaction of 1,4-dihydroxynaphthalene with 1,10-decanedithiol in benzene at 80°C for 1 hour. Formation of EuS nano-assembles with NpDDT is…
Butterfly Woods, The Wilds, an optimal habitat of dictyostelidcellular slime molds in
Mechanical synthesis of lanthanum manganite powder was investigated using attrition-type milling without any extra heat assistance. The starting materials were lanthanum oxide and manganese oxide powders. The BET equivalent diameters of them were 300 nm and 35 nm, respectively. In this paper, electric load conditions…
We present a joint experimental and theoretical study on metal dusting phenomena in Ni binary alloys containing group-14 and 15 elements in the periodic series. Laboratory metal dusting test of several Ni binary alloys was conducted in a simulated syngas atmosphere consisting of CO, H2, CO2, and H2O at 923 K for 100 h…
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The recent applications of argon gas cluster ion beam (GCIB) for X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (TOF-SIMS) are briefly reviewed. Depth profiling of organic materials has been one of the most notable challenges in conventional XPS and TOF-SIMS. Recently, it is…
NO dissociation on Cu-based catalyst is investigated using density functional theory based calculations. NO dissociation on Cu-terminated Cu2O(111) surface is comparable with its dissociation on Rh(111) which is characterized by a transition state lying below the reference level (surface and NOgas). This finding is as…
The phonon dispersion relations and density of states of the nitrides BN, AlN, GaN and InN in the wurtzite structure are investigated by using separately the local density approximation (LDA) and the generalized gradient approximation (GGA) within the framework of density functional theory. The results show that the h…
A polycrystalline diamond (PCD) disk, in which the cobalt (Co) commonly used as a sintering aid is replaced with a transition metal or a high-specific-heat material, was used as a truer, and dry grinding of a laser-preformed rake face of a radius-cutting tool made of nano-polycrystalline diamond (NPD) was conducted to…
Recently, bars for office automation and automobile industry have been required to achieve high fatigue strength. Generally, tensile residual stress is generated at the surface layer of a drawn bar after the drawing process. The tensile residual stress at the surface layer reduces fatigue strength. Therefore, decreasi…
Microstractural changes in 1050 aluminum alloy sheets were observed on the same area in a specimen with SEM-EBSD system. Specimens were heat-treated at 823 K for 3.6 ks. The specimen was cold-rolled at a reduction rate of 75% and then annealed at 623 K. Intermittent annealing using a salt bath, Ar ion-polishing and EB…
Monocentric lenses (MC) enable panoramic high-resolution imaging, but have not been fully explored. We present algorithms for systematic optimization of monocentric objectives, and show the tradeoff between lens complexity and focal length, numerical aperture and spectral bandwidth.