Materials Literature
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An investigation by experiment and computer simulation is reported into the kinetics and mechanisms of the interaction between copper and impinging reactive species as the former is etched with a chlorine or a hydrogen chloride plasma. It is established that the manner in which etching proceeds is substantially the sa…
Eunotia ariengae, an epilithic diatom from an acidic spring in Barcarena County, northern Brazil, was described. This taxon forms branched chains united at the poles and attaches to substrates by mucilage pads. It is morphologically similar to tropical species E. dacostae Metzeltin & Lange-Bertalot, but it can be clea…
A correlation is observed between the rate of NO x selective catalytic reduction by NH 3 over Fe-Beta and the number of isolated FeIII species characterised by an ESR signal at g ≈ 4.3, which is a function of total Fe loading and Si/Al ratio.
The aqueous degradation of iodinated X-ray contrast media (ICM) by the combination of ozone and ultrasound has been studied. Experiments were conducted at a constant ultrasound frequency of 20 kHz, at five power densities up to 0.235 W/mL, and various ozone centrations. In experiments involving dissolved ozone in solu…
The heat capacity of La1−x Ag x MnO3 manganites with x = 0.1, 0.15, and 0.2 is measured in the temperature range 77–350 K. An analogy between the effect of doping and the effect of a magnetic field on the temperature dependence of heat capacity of the La1−x Ag x MnO3 system is revealed. As lanthanum is replaced by sil…
Influence of the coupling agent on properties of carbon black-reinforced rubber compounds and vul- canizates was studied. Four styrene-butadiene rubber (SBR) compounds with different SBR types and five NR/SBR blend compounds with different rubber compositions were compared. Bis-(3-(triethoxysilyl)-propyl)-te- trasulfi…
Abstract Summary: Preparation and morphology of high density polyethylene (HDPE)/ polyamide 6 (PA 6)/modified clay nanocomposites were studied. The ability of PA 6 in dispersing clays was used to prepare modified delaminated clays, which were then mixed with HDPE. Mixing was performed using melt processing in a torque…
The failure criteria for carbon nanotube system fracture under biaxial tensile–torsional loads are developed based on a multiscale approach that adopts continuum mechanics models to describe atomistic predictions of failure from molecular dynamics simulations. The failure strength or envelope of carbon nanotube system…
The directed assembly of polystyrene-block-poly(methyl methacrylate) films using chemically nanopatterned polymer brush surfaces with various molecular weights was investigated. The brushes (3–10nm in thickness) were made from polystyrene that was end grafted to silicon wafers and patterned to have 40–60nm period stri…
This paper provides an overview of the key areas of magnesium research and development being undertaken internationally and consideration of the future challenges confronting the further implementation of magnesium components. This paper will also include a description of some of the technologies that the CAST Coopera…
A mathematical model of magnetic hysteresis loops for weak ac magnetic fields, which is applicable for both symmetrical hysteresis loops that are described by the Rayleigh law of magnetization and asymmetrical loops that are not, has been formulated. The asymmetrical hysteresis loops take place when the ferromagnet is…
Scalability is one of the most important properties of phase-change non-volatile memory. In this paper we review the scaling properties of ultra-thin films and phase change nanostructures investigated by time-resolved X-ray diffraction. Phase change nanostructures were fabricated by electron-beam lithography and diblo…
Recent reports on various aspects of chemistry of phthalimide are being reviewed. The emerging development of supramolecular aspects of phthalimide derivatives are critically analyzed by examining the structures of host-guest complexes and also inorganic complexes. The role of weak interactions in deciding structures…
The catalytic combustion of carbon black was investigated in the presence of CeO 2 and Al 2 O 3 . The influence of contact type between carbon particles and these oxides was examined by thermal analysis, the BET specific area, and EPR spectroscopy. For tight contact carbon black-catalyst mixtures, a new paramagnetic s…
Polypropylene (PP)/corn starch master batch (MB)/modified montmorillonite (silicate) composites with different silicate compositions of 1, 3, 5, and 7 wt% were prepared by melt compounding at 200 o C, using lab scale Brabender mixer. The thermal properties and silicate dispersion of the PP/MB/silicate composites were…
Silver-poly(methyl methacrylate) (Ag/PMMA) nanocomposites were successfully synthesized by bi-in situ ultrasonic radiating the emulsion containing methyl methacrylate (MMA) monomer and silver nitrate; no initiator or reductant in this method. The resultant Ag/PMMA nanocomposites were charazcterized by infrared spectro…
The use of metal−organic compounds for the organic modification of mesoporous silica such as MCM-41 leads to a fast, efficient, and economic access to inorganic−organic hybrid materials. Using this method, MCM-41 was modified with short-chain alkenes such as allyl and vinyl groups, as well as styrene and different ace…
Stratified, dual bed catalysts composed of platinum followed by nickel have shown reactant conversions and product selectivities similar to rhodium, which has shown the highest activity for the millisecond catalytic partial oxidation reaction. The goal of the stratified catalyst is to carry out the catalytic partial o…
Several compositions of Th2-x/2AnIVx/2(PO4)2(HPO4).H2O (An=U, Np, Pu) were prepared through hydrothermal precipitation from a mixture of nitric solutions containing cations and concentrated phosphoric acid. All the samples were fully characterized by X-ray diffraction, UV-vis, and infrared spectroscopies to check for…
Water is a scarce resource and a major factor limiting crop productivity. Precision irrigation might promote water saving. In order to implement precision irrigation, efficient techniques for estimating spatial crop water status are needed. Thermal and visible images of cotton canopies were used in this study for esti…