Ductility of High-Performance Concrete Beams with High-Strength Lateral Reinforcement
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On Estimation of Moisture Content in Mass Impregnated Distribution Cables
Mass impregnated paper insulated cables in distributionnetworks (6-33 kV) nowadays are gradually being replaced byXLPE insulated cables, yet, the percentage of mass impregnatedcables in distributio ...
Correlation between space charge distribution and water-tree location in aged XLPE cable
The correlation between charge distribution in an aged crosslinked polyethylene (XLPE) cable and the location of water trees has been studied. The space charge radial distributions at different angle in the insulating wall of a service-aged XLPE coaxial cable, induced by application of a DC stress, were measured using…
Solubility of Solid Dispersions of Pizotifen Malate and Povidone
We analyzed the physicochemical characteristics of solid dispersions of pizotifen malate and povidone (Kollidon 12) at different proportions; we used X-ray diffraction, infrared spectrometry and differential scanning calorimetry (DSC) and tested the solubility of the solid dispersions in equilibrium. The results were…
Fabrication of Through-Hole Diamond Membranes by Plasma Etching Using Anodic Porous Alumina Mask
Through-hole diamond membranes with submicrometer-sized pores were fabricated by oxygen plasma etching through an anodic porous alumina mask. Polished polycrystalline diamond film (3 μm thick) was covered with the porous alumina mask and was etched for about 10 min. The resulting diamond membrane after separating from…
Characterization of Thallium(I) Saccharinate: an unprecedented Coordination of the Saccharinate Ligand
The crystal structure of [Tl2(sac)2(H2O)]n (sac = saccharinate anion) has been solved using single crystal X-ray diffraction. It crystallizes in the triclinic space group P 1 with Z = 2 and presents a polymeric structure formed by two saccharinate anions, one water molecule and two chemically different TlI cations, on…
Flow micro-calorimetry and FTIR studies on the adsorption of saturated and unsaturated carboxylic acids onto metal hydroxide flame-retardant fillers
Carboxylic acids, particularly fatty acids, are by far the most important surface modification systems for inorganic fillers used in the plastics and rubber industries. However, relatively little is understood regarding factors that affect their adsorption behaviour, including the interplay between acid molecular stru…
Synthesis and properties of novel optically active polyimides
A facile synthesis of an optically active di-isocyanate containing alkylene groups and a preformed imide structure is described. Polycondensation reactions of the prepared di-isocyanate with pyromellitic dianhydride, benzophenone tetracarboxylic dianhydride, and hexafluoroisopropylidene diphthalic anhydride resulted i…
Effects of Dehydration Temperatures on Moisture Absorption and Dissolution Behavior of Theophylline.
Anhydrous theophylline was prepared by heating theophylline monohydrate at temperatures between 60 degrees C and 140 degrees C. The effects of dehydration temperatures on the moisture absorption and dissolution behavior of anhydrous theophylline were investigated in this study. The hydration rate of anhydrous theophyl…
Synthesis of novel poly(thioether-naphthalimide)s that utilize hydrazine as the diamine
A series of bis(4-thio-1,8-naphthalic anhydride)s and the corresponding bis(N-amino naphthalimide) derivatives were synthesized from readily available compounds in high yield. A series of novel poly(thioether-naphthalimide)s, which utilized hydrazine as the diamine, were synthesized by a one-step polymerization reacti…
Influence of pluronics on protein-loaded poly(?-caprolactone) microparticles
The objective of this study was designed to elucidate the importance of adding pluronics to PCL microparticles for the delivery of proteins. The influences of the type and the amount of pluronic on the surface morphology and release properties of protein-loaded PCL microparticles were evaluated. Microparticles were pr…
Orbital correlations in doped manganites
We review our recent X-ray scattering studies of charge and orbital order in doped manganites, with specific emphasis on the role of orbital correlations in Pr1-xCaxMnO3. For x=0.25, we find an orbital structure indistinguishable from the undoped structure and long-range orbital order at low temperatures. For dopings…
Synthesis and Electrical Properties of K- and Pr-Substituted LaGaO[sub 3] and LaInO[sub 3] Perovskites
Replacement of divalent Sr 2 + ions by monovalent K + ions in La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 2.85 ( LSGM ) decreases the electrical conductivity of LSGM and increases the activation energy to 1.42 eV. Substitution of La by substantial amounts of up to 50 atom % of Pr in LSGM yields new mixed oxide ion and electronic co…
Microstructural Control of a 70% Silicon Nitride– 30% Barium Aluminum Silicate Self‐Reinforced Composite
The processing response of a 70% silicon nitride–30% barium aluminum silicate (70%‐Si 3 N 4 –30%‐BAS) ceramic‐matrix composite was studied using pressureless sintering, at temperatures ranging from 1740°C, which is below the melting point of BAS, to 1950°C. The relationship between the processing parameters and the mi…
Self-propagating high temperature synthesis of BaFe12O19, Mg0.5Zn0.5Fe2O4 and Li0.5Fe2.5O4; time resolved X-ray diffraction studies (TRXRD)
Barium ferrite (BaFe12O19), lithium ferrite (Li0.5Fe2.5O4) and magnesium zinc ferrite (Mg0.5Zn0.5Fe2O4) have been prepared by self-propagating high-temperature synthesis (SHS) reactions from iron, iron(III) oxide and metal oxides and peroxides. The driving force for the reactions is the oxidation of iron powder. React…
Definition and application of magnetic material metrics in modeling and optimization
The modeling of magnetic components for use in electrical circuit simulation requires that the core material be accurately characterized. This paper investigates a method of extracting parameters to model the hysteresis behavior of magnetic core materials and optimizing them to achieve accurate results during circuit…
Synthesis and catalytic properties of p-acylthio(phenylacetylene)n substituted chiral manganese salen complexes
The syntheses of three new salen ligands that are tethered to a p-acylthio(phenylacetylene)n linker are described. The two key steps in the syntheses are coupling of the p-acylthio(phenylacetylene)n linker (n = 0–2) with a 5-iodosalicylaldehyde and the subsequent condensation of the aldehyde moiety of the formed adduc…
Supramolecular organisation of oligo(p-phenylenevinylene) at the air–water interface and in water
Two novel chiral (bola)amphiphilic oligo(p-phenylenevinylene)s (OPVs) have been synthesised and fully characterised. Decoration of the hydrophobic OPV backbone with a hydrophilic tris[tetra(ethylene oxide)]benzene wedge on one side and a hydrophobic tris(alkoxy)benzene wedge on the other side, resulted in amphiphilic…
Modelling of Pd and Pt supported on the {111} and {011} surfaces of cubic-ZrO2
The interaction of the noble metals Pd and Pt with the {111} and {011} surfaces of cubic-ZrO2 was examined by employing pseudo-potential plane-wave calculations within two Hamiltonians: the LDA and Perdew–Wang91 (GGA). The most favourable adsorption sites, adsorption energies, density of states and electron-charge den…
Graphical modeling and computer animation of tensile deformation in polymer liquid crystals (PLCs)
We create polymer liquid crystals (PLCs) on a computer and subject them to constant-force tensile deformations. Molecular dynamics simulation procedure is used and graphical models and animations of crack formation and propagation as a function of time are generated. Special attention is given to realistic rigid LC is…