Materials Literature
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Silicon carbide (SiC) fiber-reinforced SiC-matrix ceramic composite (SiC/SiC composite) is an attractive material for blanket/first wall structures in fusion power devices. Recent extensive materials R&D efforts are producing advanced SiC/SiC composites substantially different from conventional materials in terms of b…
Abstract A novel electrode material was obtained by two consecutive procedures: (i) the electropolymerization of NiTAPc in DMF via the electro‐oxidative N–N coupling of the amino groups, to achieve a film denoted poly‐NiTAPc, followed by (ii) the electrochemical transformation of the poly‐NiTAPc film in alkaline aqueo…
Anisotropic phase separation has been used to fabricate an electrically switchable microlens array from nematic liquid crystals. Nematic liquid-crystal-based microlens arrays have been built with diameters of approximately 400 microm and natural focal lengths as small as 1.6 mm. The focal length of each microlens in t…
Abstract Polybutadiene (PB) is used to fill an oil absorption resin as a physical crosslinker to construct a kind of 3‐dimensional network with a high degree crosslinking and low crosslink density. A series of acrylic resin particles with various compositions are prepared by suspension polymerization, using benzoyl pe…
Abstract The combinatorial method, which was exclusively employed for the drug discovery until recently, has invaded the field of inorganic materials and is becoming a key technology in materials science today. Phosphors, with their diversity of possible mechanisms of luminescence, represent a typical example of a fie…
Charge, orbital, and magnetic ordering of NdBaFe(2)O(5) and HoBaFe(2)O(5), the two end-members of the double-cell perovskite series RBaFe(2)O(5), have been characterized over the temperature range 2-450 K, using differential scanning calorimetry, neutron thermodiffractometry and high-resolution neutron powder diffract…
Generalized stacking-fault energies for the basal plane of graphite are calculated from first principles for slip along two high-symmetry directions. The rhombohedral fault energy compares well with experiment and the anisotropy in behaviour is consistent with observed dislocation network geometry. Utilizing these cal…
The electrochemical corrosion potential (ECP) of a metal is influenced by a large number of variables, such as oxygen, hydrogen, and hydrogen peroxide (H2O2) concentrations, the surface chemistry, impurities, hydrodynamic flow conditions, type of reference electrode, etc. The state of reference electrode development a…
A new mu-phenoxo-bis-mu-acetato di-Mn(II) complex using the BpmpH ligand was isolated as a perchlorate salt (BpmpH = 2,6-bis[bis(2-pyridylmethyl)aminomethyl]-4-methyl-phenol). The X-ray structure has been solved showing that the two Mn(II) ions are in a distorted octahedral environment. Investigation of the variation…
Abstract Due to the large availability of agro‐industry wastes containing potentially exploitable substrates, such as whey from dairy industry, a study on the bacterial conversion of lactose and whey permeate to poly(β‐hydroxyalkanoate) (PHA) was undertaken. A first approach was carried out on culture collection strai…
The photochemical reduction of Ag + and oxidation of Pb 2+ from aqueous solution by SrTiO 3 leave insoluble reaction products (silver and PbO 2 , respectively) on the surface. Microscopic analysis has been used to relate the rates of these two reactions to the structure and orientation of SrTiO 3 surfaces. The nonpola…
We investigate the polarization state of the fluorescence emission of individual CdSe/ZnS nanocrystals and try to establish a correlation with their crystallographic properties. The crystallinity and orientation of the particles are examined by transmission electron microscopy (TEM). These micrographs are compared wit…
Abstract Poly(3‐hydroxybutyrate) (PHB) is a highly crystalline, biodegradable and biocompatible thermoplastic. However, its limited utilization as a commodity plastic is associated to both high cost and very poor mechanical properties. Blending PHB with a natural polymer, such as starch, is one way to improve its prop…
Abstract The synthesis procedure for controlled‐structure benzoxazine model oligomers is described. To understand the complex hydrogen bonding structure, a series of benzoxazine model oligomers is characterized by nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared spectroscopy (FT‐IR). The NMR r…
Antibacterial activities of cotton and polyester/cotton fabrics treated with chitosan or chitosan/DMDHEU have been investigated. The washing durability properties of the aforementioned fabrics were also studied. Another group of fabric samples produced from mature and immature cotton fibres were dyed with reactive dye…
An aqueous combustion synthesis is used to produce powders of La 0.8 Sr 0.2 CrO 3 perovskite. It is shown that interaction between chromium nitrate and glycine controls the process. In addition, it is suggested that glycine reacts with products of nitrate decomposition to yield an intermediate compound, which decompos…
This paper examines three methods of reducing distribution transformer losses. The first method analyzes the effects of using aluminum electromagnetic shields in a distribution transformer. The goal of placing electromagnetic shields in the distribution-transformer tank walls is to reduce the stray losses. A 500 kVA s…
Abstract The preparation, characterization and properties of novel millable polyurethane/organoclay nanocomposites are reported. Clay treated with methyl tallow bis(2‐hydroxyethyl) quaternary ammonium chloride was used as an organoclay for nanocomposite preparation. X‐ray diffraction indicated the intercalation of pol…
The origin of secondary phyllosilicates in serpentinitic soils of differing moisture regimes is incompletely understood. The objective of this study was to determine the genesis of weathering products in serpentinitic soils along a moisture regime gradient using conventional x‐ray diffraction (XRD) methods and high‐re…
Abstract Ralstonia eutropha was grown in a chemostat at a dilution rate of D = 0.1 ± 0.01 h −1 under the conditions of simultaneous limitation by carbon (butyric and/or valeric acid) and nitrogen (ammonium). In order to achieve a physiological state with a high cellular polyhydroxyalkanoate (PHA) content, the ratio of…