Materials Literature
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In the Cu-Fe-sulphide mining district of Servette-Chuc (Saint-Marcel, Aosta Valley, Italy), a streambed called Eve Verda and covered with a colloidal blue-green precipitate has been known since the 18th century. X-ray and chemical analyses reveal that the precipitate is a mixture of a nanocrystalline Cu-Al-sulphate hy…
Surface-enhanced Raman spectroscopy is used to investigate the kinetics of adsorption of the cationic surfactant cetylpyridinium chloride (CPC) to hydrophobic surfaces from water. A hydrophobic surface, with stable and reproducible SERS activity, is produced by binding gold colloids to an amine-terminated glass slide…
Mixed oxide photocatalysts, ZnO-Zn2SnO4 (ZnO-ZTO) nanowires with different sizes were prepared by a simple thermal evaporation method. The ZnO-ZTO nanowires were characterized with a scanning electron microscope, X-ray diffraction, high-resolution transmission electron microscopy, energy-dispersive spectrometer, and X…
Molybdenum (Mo) adsorption was investigated on five soils from the Gauro and Roccamonfina volcanoes of Campania, a southern Italian volcanic region. The soils were characterized by different degrees of development. Molybdenum adsorption exhibited a maximum near pH 4–5 and decreased with increasing pH above 5. The cons…
PURPOSE: To design nanoparticles containing accessible gadolinium atoms (Gd-NPs) as a contrast agent for magnetic resonance imaging of tumors. METHODS: Nanoparticles containing phospholipid-chelates (phosphoethanolamine diethylenetriaminepentaacetate) and DSPE-PEG (MW5000) were prepared from Brij 78 and stearyl alcoho…
Ceramic coatings containing ZrO2 were prepared in situ on LY12 aluminum alloy by microarc oxidation (MAO) in the mixed solution of zirconate and phosphate solution. The phase composition and morphology of the coatings were studied by XRD and SEM, respectively. The growing mechanism of ceramic coatings was discussed in…
The pathway for synthesis of the peptidoglycan precursor UDP-N-acetylmuramyl pentapeptide is essential in Gram-positive and Gram-negative bacteria. This pathway has been exploited in the recent past to identify potential new antibiotics as inhibitors of one or more of the Mur enzymes. In the present study, a high-thro…
Nephrogenic systemic fibrosis (NSF) is a newly recognized systemic disorder characterized by widespread tissue fibrosis in patients with impaired renal function. Recent reports suggest that NSF is associated with exposure to gadolinium-based contrast agents used in magnetic resonance imaging. NSF can be very debilitat…
A newly developed hyphenated technique is presented combining an existing rheometer and differential scanning calorimeter into a single experimental setup. Through the development of a fixation accessory for differential scanning calorimeter (DSC) crucibles and a novel rotor, the simultaneous measurement is performed…
One of the most challenging activities for magnesium industry is to increase productivity by introducing cost-effective processes. While die-cast magnesium alloys are in worldwide use, even in the demanding sector of automotive industry, where cost is the major asset, wrought magnesium alloys still not widely availabl…
Epoxy resins were cured by an amine telechelic poly(tetramethylene oxide) (PTMO). The telechelic amine was synthesized from hydroxy telechelic PTMO and was characterized. The kinetics of curing of epoxy monomer by the polyether amine was studied in detail by differential scanning calorimetry (DSC) and rheology to opti…
Quartz crystals collected in druses, including one annealed at 400°C, from a fracture in the hanging-wall sandstone at the McArthur River uranium deposit in the Paleoproterozoic Athabasca basin, northern Saskatchewan, have been investigated by single-crystal X-band electron paramagnetic resonance (EPR) spectroscopy at…
Mesoporous silicas with controllable pore size are providing important platforms finding a multitude of applications such as in catalysis, separations, and as nanoreactors for molecular transformations. In this study, we probe the influence of a coattached hydrogen donor molecule, fluorene, on the free-radical pyrolys…
Abstract Summary: Their biodegradable properties make polyhydroxyalkanoates (PHAs) ideal candidates for innovative applications. Many studies have been primarily oriented to poly(3‐hydroxybutyrate) (PHB) and poly(3‐hydroxybutyrate‐co‐3‐valerate) (PHBV) and afterwards to blends of PHAs with synthetic biodegradable poly…
A mass of ultralong aligned carbon nanotube (CNT) bundles up to about 8 mm in length was synthesized by utilizing the spray pyrolysis of ferrocene/xylene solutions in the absence of promoters, such as thiophene or pure sulfur, and etching agents, such as plasma, oxygen, ethanol or water. Scanning electron microscopy (…
We propose a way of making graphene superconductive by putting on it small superconductive islands which cover a tiny fraction of graphene area. We show that the critical temperature, T c , can reach several Kelvins at the experimentally accessible range of parameters. At low temperatures, T T c , and zero magnetic fi…
The depth-concentration profiles of nickel upon diffusion in submicrocrystalline (SMC) molybdenum processed by severe plastic deformation (SPD) have been studied by Auger electron spectroscopy. The coefficients (D b) and activation energies of the grain-boundary diffusion of nickel in SMC molybdenum were determined in…
Alkaline leaching of porous glasses is shown to involve three consecutive steps: removal of secondary silica from the pores, disruption of the surface (boron-enriched) layer of the channel walls, and etching of the silica skeleton of the porous glass. The effect of the alkaline leaching time on the porosity and effect…
SF6gas has excellent dielectric strength and interrupting capability and is used in various applications such as gas insulated switchgear (GIS) in substations. However, since SF6has a high global warming potential (GWP), it is imperative to reduce its use and develop recovery technology for its reuse. This paper exami…
Thermal conductivity of submicron-thick aluminium oxide thin films prepared by middle frequency magnetron sputtering is measured using a transient thermo-reflectance technique. A three-layer model based on transmission line theory and the genetic algorithm optimization method are employed to obtain the thermal conduct…