Materials Literature
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Biodegradable poly(D,L-lactic acid) (PLA) microspheres containing hexamethylmelamine (HMM) were developed for potential use in chemoembolization and intraperitoneal implantation. The emulsion-solvent-evaporation/extraction method was used to prepare 15 formulations with different drug/polymer ratios, solvent compositi…
Several metal chalcogenides (e.g., ZnS, CdSe/ZnS) are known to be highly efficient scintillators. Concerns related to the use of these commercially available inorganic compounds (particle size: μm) include their low solubilities in organic and polymeric matrices. Their preparation in inorganic matrices, such as sol‐ge…
A generally known energy transfer route in activated phosphors is the cross relaxation and the subsequent impurity quenching. However, this mechanism is not satisfactory to explain the overall feature of measured decay curves of the transition in the wide range of concentrations. We suggested a new energy transfer sch…
Abstract X-ray and neutron diffraction techniques have been applied to quantitative texture analysis of a glaucophanite from the Sesia-Lanzo Zone (Western Italian Alps), naturally deformed under eclogite facies conditions. The comparison has been carried out in order to reveal the limits and problems of texture analys…
The purpose of this study was to clarify the mechanism of transformation from alpha-form to beta-form via beta'-form of glyceryl monostearate (GM) and to determine the optimum conditions of heat-treatment for physically stabilizing GM in a pharmaceutical formulation. Thermal analysis repeated twice using a differentia…
ZnO thin films were prepared on indium-tin oxide (ITO) substrates by pulsed current electrolysis. The preferred orientation of the ZnO thin films prepared by pulsed current electrolysis changed in order to (0002), and (1010) by the change in overvoltage. Green-yellow emission centered around 580 nm was observed for th…
Abstract Thin films of barium titanate (BaTiO 3 ; BT) of various thicknesses (20, 60, 120, 160 and 200 nm) were deposited by a modified sol–gel route on M‐plane sapphire [Al 2 O 3 : (10 1 0)] substrates. Raman spectroscopy (RS) and x‐ray diffraction (XRD) were used to evaluate the stress and structural changes with re…
Normal spinel ZnCr 2 O 4 undergoes an antiferromagnetic transition at T N =12.5 - 0.5 K. Dielectric constant makes a jump at T N , indicating that an abrupt change in the lattice structure is accompanied with the magnetic transition. X-ray powder diffraction shows that a probable symmetry below T N is an orthorhombic(…
The motion of a filamentary particle and also the discharge from a particle have been extensively investigated for the development of a prevention and protection method against breakdown in gas-insulated switchgear. The particle showed several different patterns of motion, e.g., "standing," precession motion, oscillat…
Previous work has demonstrated how and where the mixing of incompatible brines occurs in waterflooded reservoirs, and what the impact would be on scale prevention strategies in terms of timing and placement of squeeze treatments. This paper extends this work, by modelling the resulting in-situ deposition process. The…
An innovative solid carbonate-oxide composite and related fuel cell technology is reported. The solid carbonate-ceria composite (SCC) electrolytes were found to be highly conductive, with the material conductivity varying from 0.001 to 0.2 S/cm between 400 and 600°C. Fuel cells using these electrolytes reached a power…
The active surfaces of commercially available high temperature corrosion resistant materials can be efficiently characterized using reference reactions such as pyrolysis or metal dusting. The importance of such characterization methods is by far more conclusive than conventional surface analysis. This paper presents e…
Abstract A phenol-based macrocyclic compartmental ligand, (L2;2)2-, having N(amine)2O2 and N(imine)2O2 metal binding sites sharing two phenolic oxygen atoms, has formed the following heterodinuclear MIINiII complexes: [CoNi(L2;2)(AcO)]PF6·CH3CN (1), [NiNi(L2;2)(AcO)]PF6 (2), [CuNi(L2;2)(AcO)]PF6 (3) and [ZnNi(L2;2)(Ac…
The contributing effects of wool fibre morphology have been ignored in early mechanical behavioural models, in which the wool fibre has been treated as a two-phase composite with parallel constituents. Here, the stiffness of wool cells and fibres are modelled in terms of their morphological characteristics and the sti…
Coatings formed on a low carbon steel by a two step hot dipping, primarily in a Zn bath and secondarily in a Zn–6Al bath with or without 0.5 mass% Mg and 0.1 mass% Si addition. The effects of the Mg and Si addition on the surface morphologies, microstructures, and corrosion characteristics of the coatings were investi…
Pseudobinary Pr1−xTbx(Fe0.6Co0.4)2 (0⩽x⩽0.4) cubic Laves single phases have been synthesized by melt spinning and subsequent annealing. Their structure, magnetic properties and stability have been investigated. The composition, at which the anisotropy of Pr1−xTbx(Fe0.6Co0.4)2 is compensated, is close to x=0.1. The spo…
This volume chronicles the proceedings of the 4th International Symposium on Contact Angle, Wettability and Adhesion held in Philadelphia, PA, June 2004. The world of wettability is very wide and it plays a crucial role in many and varied technological areas ranging from microfluidics to biomedical to agriculture to w…
Manufacturing industry uses a large variety of materials for the manufacture of goods today. Among the most important of these are metals, alloys , and plastics . Different kinds of metals and alloys are required for different purposes, and the diagram given below shows some of the metals and alloys that are in common…
The crystal structure and electrophysical properties of the layered intergrowth phase Bi5PbTi3O14Cl have been studied using powder neutron diffraction, ac impedance and second harmonic generation methods. This phase adopts a structure based on a regular intergrowth of Aurivillius-like and Sillén-like blocks in the lay…
The surface of PTFE based implant material could be covalently functionalised with adhesion molecules for improved bio-adhesion by wet chemical oxidation to introduce hydroxy groups followed by cross-linking with cyanuric chloride.