Materials Literature
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The phase diagram of the system Mn2−xFexAs0.5P0.5 under pressure is investigated experimentally and theoretically. It is found that the spontaneous and magnetic-field-induced low-temperature phase in the region 0.5⩽x<0.8 does not suffer significant changes under hydrostatic pressure up to 2kbar. Based on ab ini…
Abstract The definition of “noncrystallographic symmetry” given in Volume B of the International Tables for Crystallography actually corresponds to the concept of “local symmetry”. A new definition of “noncrystallographic symmetry” is proposed, which fully complies with that of “crystallographic symmetry” in Volume A…
Thermal characterisation of thermal interfaces becomes even tougher a challenge at low bond line thicknesses and higher thermal conductivities of the interface materials as more accurate measurement techniques are required. As in parallel the quest for high conductivity adhesives and greases is ongoing, a correlation…
An aged silicone polymer insulator, which had been used at testing station near sea coast for approx. 10 years, was investigated. The aging mode was different from erosion. It was confirmed that the rubber aging phenomena was similar to damage due to nitric acid by FT-IR analysis. It is deemed that the acid was genera…
1-Acetyl-3-(4-chlorophenyl)-5-(4-methylphenyl)-2-pyrazoline has been synthesized and characterized by elemental analysis, IR and X-ray single crystal diffraction. Density functional (DFT) calculations have been carried out for the title compound by using the B3LYP method at the 6-311G** basis set level. The calculated…
A method is derived for the determination of the static dielectric permittivity of ion conducting materials when this parameter is obscured by electrode polarization in as-recorded low frequency dielectric spectra. The method requires permittivity measurements at two different electrode separations, and is applicable…
The speciation and reactions of palladium(II) complexes with meso -tetraphenylporphine (H 2 TPP) and meso -tetraphenyl-β-octaethylporphine (H 2 TetPOEP) were studied in H 2 SO 4 -H 2 O and H 2 SO 4 -HOAc protic solvents. H-associated species of PdTPP and PdTetPOEP were found to exist in sulfuric acid with concentratio…
Chitosan complexes that meet the performance criteria of water-soluble nonstoichiometric polyelectrolyte complexes have been first prepared via the interaction of chitosan with excess polystyrenesulfonate anions in acidic media. Thus, the region of the existence of soluble complexes can be narrowed down through a decr…
Palladium 3,7,13,17-tetramethyl-2,8,12,18-tetrabutylporphyrinate ( I ) and its 5,15-diaza ( II ), diphenyl ( III ), and di(4-bromophenyl) ( IV ) derivatives were synthesized by the complex formation reaction of palladium(II) chloride with corresponding tetrapyrrole ligands in dimethylformamide, and their spectral prop…
Production of initial and mechanically alloyed powders of oxide-dispersion-strengthened (ODS) 12Kh13M2FBR (EP-450) reactor stainless steel are considered. Structures of powders and compacted materials have been studied. The rate of thermal creep of the mechanically alloyed EP-450 ODS steel in comparison with the conve…
We present the results of a systematic investigation of the dc magnetization, ac susceptibility, resistivity and thermopower of Pr 2− x Sr x CoO 4 ( x = 1.2, 1.3 and 1.5). The x = 1.2 specimen undergoes a paramagnetic phase above 201.57 K, Griffiths phase between 201.57 and 129.24 K, ferromagnetic cluster-glass phase…
Article Crystal structure of dysprosium meta-oxoborate, β-Dy(BO2)3, via normal-pressure synthesis was published on September 1, 2008 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 223, issue 3).
Here we report the synthesis and superconductivity of (La 1- x Ce x )(O 0.9 F 0.1 )FeAs and (La 1- x Pb x )OFeAs, which were prepared via partially substituting the trivalent La with either Ce in LaO 0.9 F 0.1 FeAs or Pb in LaOFeAs, respectively. Influence of the doping level x on the superconducting transition temper…
Ecdysis-triggering hormone (ETH) is an integration factor in the ecdysis process of most insects, including Bombyx mori (silkworm). To understand the function of the ETH gene in silkworm, we developed an effective approach to knockdown the expression of ETH in vivo based on RNA interference (RNAi) and a binary UAS/GAL…
Electrically conductive adhesive with isotropical electrical conductivity modified with addition of silver nanoparticles has been investigated. The electrical resistance, nonlinearity of a current vs. voltage characteristic and the tensile strength of adhesive joints formed of this adhesive have been measured. The spe…
A flexible program circuit for chalcogenide non-volatile memories was developed within a 4Mb ePCM (embedded phase change memory) implemented in 90 nm CMOS technology. The proposed architecture ensures adaptability with respect to process variations and is fully compatible with a single pulse approach or a multiple pul…
The paper focuses on a method to interface a power buffer based on supercapacitors (SCs) to a system with a stiff DC voltage. An optimized design methodology is given, showing that the proposed system is able to fully control the power flow between the SCs and the DC-link, making use of reduced-rating switching device…
We report the direct modification of SPIOs with a biomolecule, and the sequence-specific assembly of the modified SPIOs was achieved with the aptamer-small molecule interaction. In addition, the transverse relaxation rate of the aqueous solutions containing the modified SPIOs was altered by the dispersion state.
This paper presents a basic research on giant magnetostrictive actuator (GMA) for fuel injector. An injector is a pilot operational valve with position servomechanism, which enables to control injection rate freely with input current into the actuator. Based on the combination of finite element analysis and experiment…
The possibilities to manufacture gold-based foams are explored. Gold powder and various powdered alloying elements are mixed with a small volume fraction of a gas-releasing blowing agent. The blend is compacted to a dense precursor, which is then melted in a further step in order to trigger foam formation. We find tha…