Materials Literature
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The changes in surface stress of a platinum electrode in acidic and alkaline sulfate or alkaline fluoride solutions were measured by the bending-beam method in connection with the surface oxygenation reaction of platinum. The surface stress exhibited a maximum in the electrical double layer potential region of platinu…
Tungsten and tantalum were examined in the TEXTOR tokamak as test limiters in order to compare their performance under plasma operation and to recognise fuel recycling on endothermic (W) and exothermic (Ta) hydrogen absorbers. Differences have been noticed in the distribution and microstructure of co-deposits, in the…
The microstructures and magnetic properties of Co90−xZr10+x (x=0–20) alloy ingots and those melt-spun ribbons were examined in order to clarify the phase and microstructure of the Co–Zr system alloys. The Co90Zr10 alloy ingot and melt-spun ribbon consisted of Co, Co23Zr6, and Co11Zr2 phases. Although the Co80Zr20 allo…
Novel phenyl benzoate-based and biphenyl-based liquid crystalline thiol-ene monomers were synthesized and their properties investigated. By varying the bridging unit and spacer length, the type of mesophase can be tuned from the low ordered nematic and smectic A phase in the case of the phenyl benzoate-based monomers,…
The epoxidation of cyclohexene over titania–silica aerogel catalysts using t-butylhydroperoxide (TBHP) was investigated by in situ attenuated total reflection (ATR) infrared spectroscopy. In order to distinguish between relevant and spectator species and to increase sensitivity, ATR was combined with modulation spectr…
Sixteen cardenolides, two hemiterpenoids, two phenylpropanoids and a phenylethanoid isolated from the roots of Streptocaulon juventas (LOUR.) MERR. were examined for their antiproliferative activity toward three human-derived (HT-1080 fibrosarcoma, lung A549 adenocarcinoma, cervix HeLa adenocarcinoma) and three murine…
Dispersed Eu2O3 nanoparticles in amorphous Al2O3 have a strong photoemission in the visible 560 to 720 nm region of the electromagnetic spectrum. Four distinct bandgroups occur with the most intense band in the spectrum at ∼666 nm (contributing as much as 50% integrated intensity It in the four bands). The It value va…
Ultraviolet absorbing CeO2–TiO2 coatings were prepared by the sol–gel spin-coating process heat treated at 500 8C. The films obtained were brilliant yellow, adherent and had some pattern on the soda-lime glass substrate. The optical transmittance, thickness and hardness of the films as a function of the number of coat…
Motivated by recent experiments on the approach to jamming of a weakly forced granular medium using an immersed torsion oscillator ( Nature , 413 (2001) 407), we propose a simple model which relates the microscopic dynamics to macroscopic rearrangements and accounts for the following experimental facts: 1) the control…
This paper is the first part of a series investigating yarn twist propagation in rotor spinning and methods to produce modified rotor spun yarns. Here. an integrated mechan ical approach is presented for dynamic twist distribution in the yarn-forming process from fibers collected in the rotor groove to the twisted yar…
High temperature thermoelectric properties of Ca1-xDyxMnO2.98 (x=0, 0.05, 0.10, 0.15, 0.20) have been measured in the temperature range from 300 to 1273K. Ca1-xDyxMnO2.98 (x=0.10, 0.15, 0.20) exhibited the metal-insulator transition in the relation between electrical resistivity and temperature, and the transition tem…
In situ (as kept at 0.25 V vs. SHE in solution) and ex situ (in air) nanoscratching tests were performed to the iron single crystal (110) and (100) surfaces passivated at 0.25 V (SHE) in pH 8.4 borate solution to evaluate the correlated mechanical and electrochemical properties, i.e. , mechanoelectrochemical propertie…
In this study photoinduced cation generation, based on the photochemical properties of malachite green (MG), was used for the surface design and in vitro photochemical control of cell adhesion and proliferation. The MG-derivatized surface was prepared by coating a photoreactive polymer as a substrate onto a poly(ethyl…
The contribution of the filler network to the reinforcement of rubber is discussed for silica and organoclay-filled SBR. Mechanical and dynamic-mechanical experiments are performed to investigate the influence of the filler network and the data are fitted with a theoretical model. The percolation threshold is much low…
MgO and NiO–MgO with large mesopores were prepared by using the corresponding nitrates and carboxylic acids. Their pore structures were characterized by N2 adsorption, and reduced Ni–MgO samples were used in the liquid-phase hydrogenation of ketone. The mesopore size of MgO was controllable with the alkyl-chain length…
In this work. the results of the synthesis of high molar weight poly(L(+) lactic acid) (PLA) which is able to thermally crystallise have been described. Such PLA can be used in fibre formation. The synthesis of poly(L(+) lactic acid) was carried out in a solution of o-dichlorobenzene, p-xylene, o-chlorotoluene, and di…
Abstract The photochromism of two spiro compounds, a spiropyran and a spirooxazine, dissolved in alcoholic solutions of metal alkoxides M(OR) n (M = Zr, Al) has been studied. In the case of the aluminium alkoxide Al(O s Bu) 3 , special photochromic behaviour is observed characteristic of complexation between the colou…
The electron gun with field emission cathode is developed. The cathode was made of a bundle of carbon fibers. Specific properties of electron gun with bundles of carbon fibers are related to mechanical displacement of carbon fibers in the bundle. Specific types of emission current instability in connection with mechan…
Applicability of the diffusion bonding was examined in a superplastic magnesium alloy, AZ31, on two different grain sizes of 28 and 11 μm. In order to investigate the superplastic behavior, the tensile test was carried out at the strain rates from 10−4 to 10−2 s−1 at elevated temperatures. These materials showed a sup…
We characterized corrosion products formed on copper plates exposed to different outdoor conditions in urban, rural/coastal, and hot spring areas by means of field emission scanning electron microscopy (FE-SEM) and Auger electron spectroscopy (AES). FE-SEM observation revealed that the surface morphology was different…