Materials Literature
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This work considers the oxidation of ammonia (NH3) by selective catalytic oxidation (SCO) over a copper (Cu)-cerium (Ce) composite catalyst at temperatures between 150 and 400 degrees C. A Cu-Ce composite catalyst was prepared by coprecipitation of copper nitrate and cerium nitrate at various molar concentrations. Thi…
Novel giant liposome microcapsules have been fabricated based on aqueous gel cores encapsulated with a lipid bilayer. The method involves templating of lipid-stabilised water-in-oil emulsions after gelling the aqueous phase with a suitable hydrocolloid.
Polymers for aqueous film coating, such as hydroxypropyl methylcellulose (HPMC), often require the inclusion of a plasticizer to reduce brittleness and increase flexibility and ductility. A vinyl pyrrolidone/vinyl acetate copolymer (S630) was investigated for its influence on HPMC film coating parameters, comparing th…
A deactivated (aged under redox-cycled model TWC feed-stream) Pd/Ce(0.68)Zr(0.32)O(2) catalyst is remarkably reactivated when subjected to a high temperature oxidising treatment whereas this effect is only marginal for Pd/Al(2)O(3), which indicates the key role of such treatment in restoring the Pd-Ce(0.68)Zr(0.32)O(2…
A new model is described for cation transport in glass, in which below Tg a dynamic equilibrium exists between ‘open’ and ‘closed’ sites. Cations migrate by hopping into a relatively small number of open sites, which must be just the right size for them to occupy. This model accounts plausibly for the apparent constan…
Shape memory alloys (SMAs) can produce large strains when deformed (e.g., up to 8%). Heating results in a phase transformation and associated recovery of all the accumulated strain. This strain recovery can occur against large forces, resulting in their use as actuators. Thus an SMA element can integrate both sensory…
A new, non‐radiographic diagnostic has been developed that appears to provide information on multiple spall and damage layers in metals. The velocities of multiple layers (up to 5 in copper) can be determined using this method, with additional information possible on damaged material between layers at densities less t…
In this research, the effects of microorganisms on suede quality of double-face leather were examined. The bacterial numbers on salted sheepskin samples were found as 1.8x10 6 -4.3x10 7 cfu/g on solid medium and 1.9x10 6 -4.7x10 7 cfu/g on halophile medium containing 10-30% NaCl. However it was found that salted sheep…
Magnetic barkhausen emission measurements have been made on G86200 and G33106 steel specimens which have been case carburized to different case depths ranging from 0.5 to 1.5 mm (0.02 to 0.06 in.). The profile of root mean square voltage of the magnetic barkhausen emission signal plotted as a function of the voltage a…
Electric double-layer capacitors based on the charge storage at the interface between a high specific surface area activated carbon electrode and an electrolyte solution have been developed, and are widely used as maintenance-free power source for IC memories and microcomputers. Following the production of small size…
Copper corrosion in the presence of orthophosphate and chlorine has indicated the formation of a protective scale containing either CuO or Cu2O depending on the pH. Furthermore, the scale forms relatively quickly, after 15 days of immersion EIS showed very little change. The scale is initially porous, but after prolon…
Nanocomposites consisting of conducting polyaniline and clay minerals were successfully synthesized from mechanochemically intercalated anilinium fluoride; the nanocomposites prepared by the mechanochemical intercalation method contained much more polyaniline in the clay layers than those prepared by a conventional so…
Paper made from recycled, chemically pulped fibers typically has lower strength than paper made from virgin fibers. This was confirmed with respect to tensile and compression strength for an unbleached softwood kraft pulp. It was also confirmed that the addition of sucrose, at high concentration, to virgin pulp before…
Ring twisting gives the strength properties of yarn like friction spinning. Two multifilaments arranged in parallel and slightly twisted together form a loose structure with a slightly mixed arrangement of fibres. The structure of pneumatic textured yarn obtained by means of a stream of compressed air has a greatly mi…
To gain a better understanding of the mechanism of corrosion inhibition by oxygen reduction reaction (ORR) inhibitors, the concentration dependence of ORR inhibition has been determined for hexavalent chromium, cerrous ion, and 2,5-dimercapto-1,3,4-thiadiazolate on a Cu rotating disk cathode. The results show critical…
The magnetic glass ceramics with the particles of SrFe12O19 having various aspect ratios was obtained by the crystallisation of oxide glass precursors in different chemical systems.
The binding properties of 1,4,7-triazacyclononane ([9]aneN3) to metal cations can be adapted through sequential functionalisation of the secondary amines with aminoethyl or aminopropyl pendant arms to generate ligands with increasing numbers of donor atoms. The new amino functionalised pendant arm derivative of 1,4,7-…
Abstract This paper summarizes recent synthetic efforts devoted to the generation of new, second-generation texaphyrin-type drugs, specifically species that involve known or potential anticancer agents covalently attached to a tumor-localizing texaphyrin core. Particular emphasis will be placed on the strategies neede…
Electroless gold nanoplating of various forms of surfactant tubules yielded mono-, double- and multi-helical gold nanowires and their yarns in solution.
A Mg—Zn—Y—Zr alloy sheet containing icosahedral quasicrystalline particles and Zr-rich particles has been developed by the thermomechanical processes, i.e. hot extrusion and hot rolling. The grain size is found to be 5 μm. The superplastic deformation behavior of the alloy has been investigated. Under the test conditi…