Materials Literature
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New kinetic measurements for the CH3O + NO reaction have been performed using two different techniques. The discharge flow (DF) technique has been used to investigate the 0.5–5 Torr and 248–473 K pressure and temperature ranges and pulsed laser photolysis (PLP) has been used for the 30–500 Torr and 284–364 K ranges. T…
Infrared spectra are reported of 12 CO and 12 CO/ 13 CO mixtures adsorbed on colloidal platinum with a mean particle size of 15 Å, stabilized in liquid dispersion by polyvinylpyrrolidone. A shift to higher frequency with increasing coverage of 12 CO is observed in the high-frequency (on-top) CO band, and for 12 CO/ 13…
Synthetic phyllosilicates, with nickel replacing the magnesium atoms, have been prepared under autogenous pressures at 220 °C. Both 1:1 phyllosilicate, having interlayer spacing of 7 Å, and 2:1 phyllosilicate with 9.4 Å spacing were obtained depending on the metal to silicon ratio. The latter was also expanded to 13.2…
Abstract Impact cushioning and deformation of flexible open‐cell polyester polyurethane (PU) foams were studied as a function of specimen geometry, including the incorporation of controlled voids. It was shown that cushioning behavior is dependent on sample geometry, which was in trun due to a complex balance of air c…
Opto-thermal transient emission radiometry (OTTER) is a novel infrared remote sensing technology that can be used for water distribution within stratum corneum measurements. Comparing with other skin water content measurement techniques, OTTER has the advantages of non-contact, non-destructive, spectroscopic in nature…
The use of magnesium is closely associated with the history of the Volkswagen company. It reached a high point in 1971 of 42,000 t a year (engine block and gearbox housing, various small components) primarily for production of the air-cooled models (Beetle, Transporter). That represented approximately 20 kg of magnesi…
Abstract The use of adhesive tapes, tabs and liquids is a simple and cost-effective method for sampling gunshot residues and other trace or particulate materials prior to analysis in a scanning electron microscope (SEM). The adhesive material is placed directly onto a standard stub (specimen mount) used in scanning el…
An experimental investigation of the thermomechanical behaviour of pitch and resin bonded magnesia-carbon refractory materials has been carried out within the temperature range 20-1500°C by tension, compression, and three point bend tests. At room temperature, both types of material exhibited a non-linear, quasi britt…
Condensation of pyrrole and benzaldehyde was carried out in isooctane or cyclohexane in the presence of MCM-41, HY (Si/Al 15) and CoY (Si/Al 2.6). In all cases, formation of tetraphenylporphyrin (TPP) was observed in the organic solutions, even after dissolving with hydrofluoric acid the resulting MCM-41 solid employe…
Abstract International Standard ISO 9223-92 permits the determination of atmospheric corrosivity based on either corrosion rates determined from annual tests on several standard metals or on the time of wetness (TOW) and pollution levels of SO2 and Cl−. Experience shows that the corrosion rate is influenced by the exp…
Ultrastructural and cytochemical studies on the mineralization of enameloid were performed using Heterodontus japonicus, an elasmobranch, and Tilapia buttikoferi, a teleost as materials. The mineralization of the enameloid in the Heterodontus was divided into the following two steps: (1) initial crystallization in the…
The mixed-ligand phthalocyanine lanthanide complexes [Ln(pc)X2] [pc = phthalocyanine radical anion; Ln = Sm, Eu, Gd or Lu; X = 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dionate (fod), 1,1,1-trifluoro-4-phenylbutane-2,4-dionate (btfa) or 3-heptafluorobutyryl-D-camphorate (hfbc)] have been synthesized and charact…
The effect of initial CO2 concentraion on NO destruction and regeneration was investigated as part of our ongoing research on NO emission from CO2 recycled coal combustion, which could realize easy CO2 recovery and drastic NO reduction simultaneously. Experiments were carried out in a flat flame burner for CH4 / O2 /…
The contrast observed in the (0001) HREM images of MoS2 are interpreted with a model based on rotational moiré patterns. Computer-simulated images show that rotations of two supercells by angles of 3, 5, 8, and 16 degrees around their centers reproduce the contrast observed in the experimental images. The calculations…
The oxidation behaviour of several TiB2 cermets has been studied in air in a range of temperatures between 700 and 1000C for up to 70h. The oxidation resistance of these materials has been characterised through measurements of mass gain as a function of time and temperature. The oxidation kinetics of these cermets was…
Diffusion coefficient of carriers, D, and their mobility, μ, in disordered semiconductors at very low temperatures are temperature-independent, being determined by the energy-loss hopping of carriers through localized band-tail states. In such a hopping relaxation in a system with exponential density of tail states, t…
A set of poly(β- l -aspartate)s bearing branched alkyl side groups of varying shapes and sizes has been synthesized, and the crystal structures of these polymers have been investigated by X-ray diffraction and computational methods. The anionic ring-opening polymerization of 4-(( S )-alkoxycarbonyl)-β-lactams (the alk…
A novel route for modifying the interlayer pore structure of silica iron oxide sol particle pillared montmorillonite was proposed based on the post-intercalation of organic templates. The pristine mixed oxide sol pillared montmorillonite (SFM) was prepared by the reaction of Na-montmorillonite with silica iron sol par…
The surface chemistry, reactivity of vaterite, and its crystalline transformation in the presence of manganese(II) have been studied in ultra-pure water and at room temperature using several techniques: X-ray diffraction (XRD), scanning electron microscopy (SEM), specific area measurements (BET), infrared (IR) spectro…
The effect of vanadium and niobium on the restoration behavior after hot deformation in medium carbon spring steels was investigated by use of a thermomechanical processing simulator. It was clarified that vanadium is effective to inhibit restoration after hot deformation, because vanadium carbides and/or nitrides fin…