Materials Literature
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New chiral dopants for nematic liquid crystals were synthesized using optically active 4,4,4-trifluoro-3-phenylbutanoic acid. The magnitude of helical twisting power (HTP) was largely influenced by the linkage between the asymmetric frame and the core moiety. The chiral dopant, 4,4,4-trifluoro-1-(4-hexyloxyphenyl)-3-p…
A model that considers combined effects of the interfacial energy and the magnetic anisotropy energy is proposed to examine development of the crystallographically aligned microstructure during annealing under a magnetic field. For ferromagnetic materials with rather large magnetic anisotropy energies, the model indic…
Isotactic polyprpylene (iPP) occurs in several crystalline forms, denoted as f (monoclinic), g (hexagonal), and n (orthorhombic) phases. Hot-stage microscopy, differential scanning calorimetery, and wide-angle X-ray diffraction were used to investigate the influence of thermal treatment and nucleating agents on the mo…
The reduction of horse heart cytochrome cIII by [FeII(edta)(H2O)]2−[FeII(edta)(H2O)]2− + [cytochrome cIII]7+ → [FeIII(edta)(H2O)]− + [cytochrome cII]6+ was reinvestigated as a function of all chemical and physical variables. Possible electrostatic interaction between the oppositely charged redox partners can assist th…
Two octamethyldisiloxa-bridged [3.3]cyclophanes (1 and 2) and a dodecamethyltrissiloxa-bridged [3.3.3]-cage compound (3) were prepared by hydrolysis of the chlorosilyl monomers. This general route was also employed for the preparation of two octamethyldisiloxa-bridged [3.3]heterophanes featuring two thiophene (14) or…
Scanning Electronic Microscopes (SEM) are widely used either for cross‐section measurement (process development) or for top‐down CD measurement (production). ITRS roadmap for CD and overlay metrology points out some difficult challenges for next technology nodes. Up to now, we remained confident respectively in SEM ca…
The effect of eight preparation control factors, i.e. , atmosphere, sintering temperature, sintering time, and ratios, of on mechanoluminescence (ML) intensity has been investigated by the design of experiments and the analysis of variance in order to increase the ML intensity. Consequently, it is proved statistically…
The effects of compound formulations and processing conditions on the structure and properties of extruded EPDM and EPDM/NR blends of tube foams were investigated. The foam tubes were prepared by mixing a compound in a two roll mill, extruding the compound through a cold feed extruder and finally vulcanizing the extru…
The oxidative properties and characterization of CuO, CeO2 and CuO/CeO2 catalysts were examined by means of a CO micro-reactor GC system, TPR, XPS and X-ray diffraction Rietveld methods. The results show that either CuO or CeO2 activity is quite low for CO oxidation. However, when CuO and CeO2 are mixed, the oxidative…
Hydrogen environment embrittlement (HEE) of carbon steels (SUY, S15C and S35C) was investigated at the temperature range from 300 to 100 K with the strain rate of 4.2×10−5 s−1 by using specially designed equipment. The results obtained are as follows.(1) HEE increased with decreasing temperature, reached a maximum at…
Highly oriented polycrystalline ZnO films have been prepared by rf actively sputtering technique. We have investigated the structural and optical properties of ZnO films. x-ray diffraction was employed to analyze the influence of the post-treatment on the properties of ZnO thin films. The grain size increases with ann…
This study refers to the application of in-situ electrochemical synthesis as an alternative method to improve the properties of porous materials against harmful external agents that deteriorate them. It is oriented to an understanding of the effects of crystallisation on the pore structure of different compounds commo…
The objective of this research was to investigate the possibility of using rice husk flour as a partial substitute for the wood particles used as the raw material for manufacturing particleboards, by examining the physical and mechanical properties of the rice husk flour-wood particleboard as a function of the type of…
洞爺火山灰降灰以降の岩手火山のテフラの識別を行うため,これらのテフラが模式的に露出することが示されている3地点で,火山ガラスおよび斜方輝石の屈折率を詳細に測定した.また,火山ガラスの色調,発泡形態および微斑晶の含有量を明らかにした.その結果,これまでに野外で識別されている個々のテフラは,鉱物組成.火山ガラスの形態,屈折率および斜方輝石の屈折率が異なり,それぞれをこれらの記載岩石学的特徴から識別できることが明らかとなった.なお,これらのテフラの中には雪浦軽石のように火山ガラスの屈折率が異なる3種類の軽石が混在していることも明らかとなった.岩手火山では,模式地でのテフラの上記記載岩石学的特徴をカタログ化すれば,層準未知のテフラを同定で…
Gatelite-(Ce), ideally (Ca 1 REE 3 ) Σ=4 [Al2(Al,Mg)(Mg,Fe,Al)] Σ=4 [Si 2 O 7 ][SiO 4 ] 3 (O,F) (OH,O) 2 , is a newly identified mineral from the Trimouns talc deposit, Luzenac, Ariège, French Pyrenees. The mineral occurs as striated colorless crystals finely intergrown with minute lamellae of törnebohmite- (Ce). Asso…
Zhang, Q. and Britton, M.G. 2003. A micromechanics model for predicting dynamic loads during discharge in bulk solids storage structures. Canadian Biosystems Engineering/Le genie des biosystemes au Canada 45: 5.21 5.27. A two-dimensional microstructure mechanics model has been developed for predicting dynamic pressure…
Abstract NMR has benefited tremendously from superconducting magnet technology providing stable, ever increasing magnetic fields over the last few decades. However, since superconductors expel magnetic field and with no suitable material in sight this trend has come to a halt at ∼20 T, and resistive magnet designs are…
Standard raw materials, kaolin and talc, were used in synthesis of cordierite ceramics. Cordierite mass corresponded to 2MgO-2Al2O3- 5SiO2 composition. Synthetized cordierite was used as a refractory filler in the ceramic layer for evaporative polystyrene patterns in the new casting technology, Lost Foam Process. Cord…
Probe beam deflection during chronoamperometric oxidation-reduction of osmium complex in layer-by-layer self-assembled redox active polyelectrolyte multilayers has shown that the nature of the charge in the topmost layer determines the ion flux that balances the redox charge.
The existing methods of studying hydrogen sulfide (H2S) corrosion and its inhibitors were critically reviewed. Of the laboratory methods, the techniques using corrosion test specimens, the electrochemical methods (potentiokinetic polarization curves, potentiostatic measurements, impedance), and the corrosimetric metho…