Materials Literature
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The effect of Si on the corrosion properties of Ca-modified weathering steel was evaluated with respect to the formation behavior of complex inclusions in the steel and the dissolution behavior of the inclusions in thin water film by pH measurement and electrochemical impedance spectroscopy (EIS). To understand the lo…
We have investigated the effect of Bi/sub 2/O/sub 3/ additive on the densification, low-temperature firing, and magnetic characteristics of modified Z-type Ba/sub 3/Co/sub 2/(1-x-y)Zn/sub 2x/Cu/sub 2y/Fe/sub 23.5/O/sub 41/ hexaferrite. Our results show that Bi/sub 2/O/sub 3/ additive not only improves the densificatio…
Ca 3−x Sr x Co 4 O 9 (x=0,0.5,1.0) samples were prepared by solid state reaction. As expected from the radii of Sr2+ and Ca2+, the cell parameters increase with Sr content x. Simultaneously, the resistivity and the carrier localization at low temperature are enhanced. The thermoelectric power is not sensitive to the S…
Liquid-crystalline compounds 1 and 3 having perfluoroalkyl-terminated mesogens at both ends of poly(ethylene oxide) chains have been prepared. These compounds show smectic A (SA) and C phases over 100 °C. The SA-Iso (isotropic) transition temperatures are higher by about 70 °C than those of the corresponding alkyl-sub…
Dew retted hackled long flax was treated with propyltrimethoxysilane, phenylisocyanate and maleic acid anhydride modified polypropylene (MAA-PP). The results of these treatments on fiber wetting and interfacial properties have already been reported in a previous article [Van de Velde, K. and Kiekens, P. (2001). J. The…
Lamellar single crystals of poly[(R)-3-hydroxybutyrate] (P(3HB)) with three types of molecular weights and four kinds of P(3HB) copolymers with different secondary monomer units were grown from dilute solutions of chloroform and ethanol under isothermal crystallization conditions. The surface morphologies of all the s…
Platinum and Palladium behave in an unexpected manner when cathodically polarised in the presence of electrolytes dissolved in carefully dried polar organic solvents, such as N,N-dimethylformamide. A reductive layer is formed on the metal the thickness of which depends on the amount of electricity consumed during the…
This paper deals with the applicability of various techniques for the assessment and quantification of sensitisation in AISI Type 316L welds. Welded joints of AISI Type 316L stainless steel were aged at 973 K for periods of up to 200 h. The base and weld metal components of the aged joints were then assessed for susce…
gamma-Glutamyl hydrolase catalyzes the cleavage of the gamma-glutamyl chain of folylpoly-gamma-glutamyl substrates and is a central enzyme in folyl and antifolyl poly-gamma-glutamate metabolism. The crystal structure of human gamma-glutamyl hydrolase, determined at 1.6-A resolution, reveals that the protein is a homod…
The thermal quenching properties of the thermoluminescence (TL) from several natural quartz specimens were examined, at two different wavelengths, using the heating rate dependence of the TL signal. As the heating rate varies the TL peaks shift to different temperatures and become affected by thermal quenching to diff…
The high‐temperature oxidation of a silicon nitride‐titanium nitride (Si 3 N 4 –TiN) composite has been investigated via scanning electron microscopy and energy‐dispersive and wavelength‐dispersive spectrometry. At 1150°C, the oxidation of both the silicon nitride and titanium nitride phases takes place. Several oxida…
In a previous study, we showed that there was a significant increase in mycolata numbers associated with foaming events at a wastewater treatment site possessing three activated sludge plants. In this paper, we demonstrate that branched filamentous mycolata were a minor proportion of the mycolata morphotypes present i…
ZnCdSeTe/ZnMgSeTe quasi-quaternary light-emitting devices emitting in the green–yellow wavelength region grown on ZnTe substrates are promising for efficient green light emitters. To solve the n-type conductivity problem in ZnTe-related materials, Cl-doped ZnMgSeTe quasi-quaternary layers which consisted of very thin…
Partially methacrylated pullulan was crosslinked by means of conventional and “living” radical polymerisations using, in the latter case, the reversible addition–fragmentation chain-transfer technique (RAFT). Several hydrogels were synthesised using methacrylated pullulan samples with different degrees of substitution…
Effects of N 2 sintering atmosphere and the starting SiC powder on the microstructural evolution of liquid‐phase‐sintered (LPS) SiC were studied. It was found that, for the β‐SiC starting powder case, there was complete suppression of the β→α phase transformation, which otherwise goes to completion in Ar atmosphere. I…
Comparative mechanical tests of an Al-Cu-Fe quasicrystal and a tungsten (001) single crystal have been carried out using cyclic nanoindentation by a Berkovich indenter. The first loading-unloading cycle up to 30 mN formed the initial indent. On reloading of the indenter up to 50 mN, a transition from elastic to plasti…
Epilithic diatom assemblages were used to evaluate water quality in the Karasu River basin (Turkey), which was polluted by industrial, agricultural and urban wastes. A total of 73 diatom taxa belonging to 22 genera were found from all seven sampling stations located in the River basin. The most pollution tolerant spec…
We have performed a photoemission study of La 1 − x Sr x TiO 3 + y /2 near the filling-control metal-insulator transition (MIT) as a function of hole doping. The spectral intensity at the chemical potential (μ) and the mass enhancement factor deduced from the bandwidth show qualitatively the same doping dependence as…
We evaluated the extent (luminal coverage) of the endothelial cell (EC) lining/neointimal development and the thromboresistance of electrostatically EC seeded small diameter ChronoFlex-polyurethane vascular grafts. The evaluation consisted of harvesting autologous, canine jugular vein ECs, electrostatically seeding th…
Uniquely structured two-dimensional aluminum–silicon alloy nanowire networks are fabricated on glass and silicon substrates by dealloying an aluminum–silicon thin film through selective chemical etching. The nanowire network is comprised of 3–6 nm diameter wires with lengths of 50–200 nm, and a wire density of approxi…