Materials Literature
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Abstract The complex [Mg(1, 10‐phenanthroline) 3 (NO 3 ) 2 ]·9H 2 O has been synthesized. It forms crystals having the shape of sheaves with very thin filaments. The compound has been characterized by UV, IR, NMR and mass spectra. The UV and mass spectra are indicative of an electron density transfer from NO 3 — to Mg…
SUMMARIES On the basis of results obtained by the accelerated ageing of papers made of bleached softwood and rag cellulose the apparent activation energies of cellulose degradation were estimated as being 103 and 106 kJ/mol respectively. The temperatures of 40º and 60ºC were found to be inappropriate for the study of…
Abstract Hydrophilic polysulfone ultrafiltration membranes were prepared from blends of cellulose acetate and carboxylated polysulfones of 0.43 and 0.75 degrees of carboxylation. The effects of degree of carboxylation on membrane characteristics such as compaction, pure water flux, water content and membrane hydraulic…
The wide range of electrical, electrochemical, and optical properties associated with Polyaniline (PANI) and its composites has made them attractive for many industrial applications. In this study, Emeraldine Salt (ES), which is a doped conducting form of PANI, was chemically prepared in situ using the oxidizing agent…
The self-assembly and lyotropic mesomorphism of guanosine derivatives are reviewed. Natural and synthetic guanosine nucleotides self-assemble into columnar aggregates based on G-quartets; at the appropriate concentrations these aggregates form, in water, lyotropic mesophases of the cholesteric and hexagonal type. Lipo…
Results reported on the dielectric properties, spontaneous polarization (Ps) and switching time of a FLC material and a mixture of the FLC material after having doped with a small quantity of optical adhesive polymer. The mixture has been prepared by dissolving NOA65 prepolymer and the FLC compound in chloroform. A ho…
The effects of size and shape of calcium carbonate (CC) and hydroxyapatite (HA) fillers on the degradation of poly(DL-lactic acid-co-glycolic acid) (PLGA) were examined in the PLGA composite films containing 50 mass% of the fillers. The composite and unfilled films were prepared by our method reported previously. The…
A university laboratory experiment for the US Department of Energy magnetic fusion research program required a simulant for liquid lithium. The simulant choices were narrowed to liquid gallium and galinstan (Ga-In-Sn) alloy. Safety information on liquid gallium and galinstan were compiled, and the choice was made to u…
Special requirements for microwave mechanics -- Systematic flowchart model -- Material selection for microwave mechanics -- Computer-aided environment for design work -- Instructions for technical documentation and dimensioning -- Effects of production volume and related topics -- Welded components -- Other joining te…
Pseudomonas chlororaphis HS21 was isolated from a soil sample and found to produce medium-chain-length polyhydroxyalkanoates (MCL-PHAs) using palm kernel oil (PKO) as the sole carbon source. Up to 3.3 g/l dry cell weight containing 45% MCL-PHA was produced, when the strain was grown for 21 h in a jar fermentor culture…
The dynamic rheological behavior of polymer composites filled with particles has been an interesting topic in polymer research fields because of the challenging physical problems and the increasing technological applications behind. In this paper, recent progress in studies on the characteristic dynamic rheological re…
The Ti–18Nb–4Sn alloy has been confirmed to possess much higher corrosion resistance compared to the NiTi alloy throughout immersion time up to 604.8 ks in a 0.05 mass% HCl at 310 K open to air. The Ti–18Nb–4Sn alloy shows higher open circuit potential, compared to titanium metal and NiTi alloy. The higher open circui…
Single-crystal X-ray diffraction measurements at low temperature were carried out using the image-plate technique in the vacuum chamber at BL02B1 of SPring-8. The intensity data were collected at 20 K, 70 K, and 150 K, 36 photographs being taken at each temperature. The systematic extinctions observed at 20 K could be…
The thermal contact resistance of polymer-based carbon fiber composites was calculated from experimental thermal conductivity values. Thermal conductivity of the composites increases as the fiber content increases. In order to explain the variation with size and volume fraction of the conductive inclusions in the comp…
Rice hulls and crushed pecan shells are two solid waste materials with potential for use as thermal insulation. The apparent thermal conductivity, ka, of parboiled rice hulls and crushed pecan shells has been measured in two laboratories over the temperature range 4 to 41 oC using heat-flow meter apparatuses. Thermal…
In a preliminary calculation the simple case of parallel flow past flat plates is investigated. Using this simplification numerous fouling experiments under different conditions were performed. The measurements were taken using aqueous solutions of CaSO4 and serve for the verification of the numerical simulation. The…
This paper is in four parts. The first is related to general considerations and experimental analyses, and each of the others is related to different approaches to theoretical analyses of the mechanical behaviour of weft-knitted fabrics and weft-knitted reinforced composites made of glass fibre. The objective is to fi…
Many organisms from a wide variety of taxa produce amorphous calcium carbonate (ACC), despite the fact that it is inherently unstable and relatively soluble in its pure state. These properties also make it difficult to detect and characterize ACC. Raman spectroscopy is a particularly useful method for investigating AC…
The complex role of sulfur in magnesium treated iron was evaluated in both ductile and compacted graphite irons. At elevated levels, sulfur can act as a harmful element resulting in magnesium-neutralization and increased dross formation but is also beneficial and essential at lower levels because it promotes suitable…
Cure characteristics and mechanical properties of styrene butadiene rubber reclaimed rubber blends were studied. The blends showed improved processability, as indicated by the minimum torque values. Cure characteristics like minimum torque, (maximum-minimum) torque, cure time and cure rate decreased in the presence of…