Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The paper elucidates the methodsof estimating damping in ceramic matrix composites (CMC) with matrix cracks. Unidirectional composites with bridging matrix cracks and cross-ply laminates with tunneling cracks in transverse layers and bridging cracks in longitudinal layers are considered. It is shown that bridging matr…
An investigation of the gasoline permeation resistance of polyethylene (PE), polyethylene/modified polyamide (MPA), and polyethylene/blends of modified polyamide and ethylene vinyl alcohol (MPAEVOH) bottles is reported. The gasoline permeation resistance improves slightly after blending EVOH barrier resins in PE matri…
Stretching PET at a high strain rate above the glass transition temperature has a positive effect on the strength of the material. In a recent paper[1], we presented the influence of stretch and blow molding parameters on the properties of the final product, especially on the crystallinity induced by stretching. In th…
A 30-ft/s vertical drop test of a 10-ft-long fuselage section of a Boeing 737 (B737) aircraft was conducted in October of 1999 at the Federal Aviation Administration (FAA) William J. Hughes Technical Center, Atlantic City International Airport, NJ. This test was performed to evaluate the structural integrity of a conf…
Modeling of three-phase transformers with three-limb cores is important. Such units are very ubiquitous and are asymmetric due to the different lengths of the three limbs of the core. It is, therefore, important to devise a measuring procedure where the (λ-i) characteristics of the three limbs and the zero-sequence (λ…
Abstract A far cold remote nitrogen (FCRN) plasma, eventually doped with oxygen, was used to modify the surface properties of a polyethylene (PE) powder. The process associates both remote plasma and fluidized bed technologies. Two applications are described. The first one, for increasing the hydrophilic character of…
The crystal structures of the enzyme orotidine-5'-monophosphate decarboxylase from Methanobacterium thermoautotrophicum complexed with its product UMP and the inhibitors 6-hydroxyuridine 5'-phosphate (BMP), XMP, and CMP are reported. A mutant version of the protein, in which four residues of the flexible phosphate-bin…
Abstract Tris(8-hydroxyquinoline)aluminum (III) complexes (Alq 3 ), one of the molecules studied most widely for organic light-emitting devices, were formed in the interlayer spaces of smectites by solid-solid reactions between Al-smectites (Al-montmorillonite and Al-synthetic saponite (Sumecton)) and 8-hydroxyquinoli…
A new method has been standardized for extraction of polyhydroxy alkanoates from the bacteria, using sodium hypochlorite. This method is simple and quick as compared to the existing methods. Statistical analysis has proved the method to be reliable and reproducible.
Ceramic materials that are widely employed in dental prosthetics and repairs exhibit luminescent properties. Because of their use in the body, these materials are potentially of interest in situations where retrospective dosimetry for individuals is required but where monitoring was not planned. The luminescent proper…
Abstract X‐ray photoelectron spectroscopy measurements of commercial bulk MoO 2 revealed the presence of MoO 3 and Mo 2 O 5 phases in the sample surface region. In situ hydrogen reduction at different temperatures up to 650 K enabled to be reduced Mo 6+ and Mo 5+ to Mo 4+ . Bulk MoO 2 as prepared by hydrogen reduction…
The effect of an applied magnetic field on the optical properties of a layer of a helical periodic medium is studied in view of magnetooptic activity. The case when the radiation is normally incident on the layer and the magnetic field is aligned with the axis of the medium is considered. Irreversibility (nonreciproci…
Abstract The understanding of protein interaction with metal surfaces has become a key question for the use of materials in medicine, in the food industry or in marine environment in connection with the process of biofouling. However, the role of the various salts present in natural seawater has never been systematica…
The influence of composition on Fe 2+ -Mg intracrystalline distribution was studied in eleven synthetic crystals belonging to the spinel (sensu stricto)-hercynite series (Mg 1-y Fe 2+ y )Al 2 O 4 , with 0 ≤ y ≤ 1, produced by flux-growth at 800 °C. Samples were analyzed by single-crystal X-ray diffraction and electron…
Abstract Ceria‐based mixed oxides have proved to be good alternatives to pure ceria as redox materials for advanced three‐way catalysts. In this work, the behaviour of a Ce 0.8 Tb 0.2 O 2− x mixed‐oxide sample and the corresponding oxide‐supported Rh and Pt samples has been investigated. Special attention has been pai…
Abstract Glow discharge optical emission spectrometry (GDOES) and scanning electron microscopy + energy‐dispersive spectrometry (SEM + EDS) are used for studying the microchemistry of the long‐term corrosion products, i.e. the patina , on archaeological high‐tin leaded bronzes used by Romans, most likely as mirrors. T…
Two kinds of nanocrystalline indium tin oxide (ITO) powders with different crystal structures—rhombohedral and cubic—were prepared using a coprecipitation process through the control of aging time of precipitates after coprecipitation. The densification characteristics of the two ITO powders were examined. During sint…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTGlass Transition of Microtome-Sliced Thin FilmsXiaorong Wang and Wensheng ZhouView Author Information Bridgestone/Firestone Research Center, 1200 Firestone Parkway, Akron, Ohio 44317 Cite this: Macromolecules 2002, 35, 18, 6747–6750…
We describe the upwards movement of an air bubble creeping along a slightly inclined plane immersed in a viscous liquid which totally wets the solid. After characterizing the shape of the static bubble under a horizontal plane, we tilt the plane and study the resulting motion. The bubble reaches a steady velocity, whi…
Abstract The ultrasound technique was applied to the synthesis of layered double hydroxides. The use of ultrasound in the synthesis of these compounds was studied in terms of its effect on their crystal qualities and surface properties. The crystal qualities of the compounds synthesized with ultrasound were compared w…