Materials Literature
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The crystal structure of anhydrous δ- D -mannitol (C 6 H 14 O 6 ) was solved from high-resolution synchrotron X-ray powder diffraction data collected on a mixture containing 20% and 80% w/w of β- and δ- D -mannitol, respectively. The direct space simulated annealing program PSSP , and Rietveld analysis employing GSAS…
The synthesis of crystalline y ‐Y 2 Si 2 O 7 has been achieved at a temperature as low as 365°C. This has been accomplished by following a hydrothermal method and using a layered clay as silicon source, whose structure‐directing character facilitates the nucleation process. The structural characterization of the y ‐Y…
The optimisation of physical foaming of branched Daploy ™ WB130HMS polypropylene foam resin and corresponding blends with a Polypropylene Blockcopolymer are described in this paper. The resulting foam morphologies of blends consisting of linear and branched polypropylene materials produced at various processing temper…
The synthesis of a variety of thiophene-containing materials for use in electro-optic devices requiring highly birefringent materials is reported. The refractive indices were measured with the use of an Abbé refractometer, and from these results the optical anisotropies, polarizabilities and order parameters were dete…
Activated carbons (ACs) were prepared by the physical activation of cork wood, virgin cork and adult cork of different particle sizes in carbon dioxide and characterised by elemental analysis, DRIFTS, SEM and N 2 adsorption at −196°C. The wood gave results similar to those obtained with other lignocellulosic precursor…
This study analyses diatom communities on submerged stones in three areas of the Bothnian Sea, a subbasin of the brackish Baltic Sea. The communities were composed of mixtures of epilithic, epiphytic, epipelic, epipsammic and occasionally some pelagic diatoms. Altogether, 120 quantitative epilithic samples, 40 per are…
Mechanisms in which fatty acids destabilize beer foam have been studied. Foam stability of a pilot-brewed beer was measured in the presence of a range of concentrations of fatty acids, similar to those found in a range of commercial beers. The foams were sparged with nitrogen and studied using a microconductivity tech…
Compression stress-strain measurements have been conducted on two commercial high temperature thermoplastic polymers (polyamideimide (PAI) and partially crystalline polyetheretherketone (PEEK)) as a function of temperature (-55°C to 300°C) and strain rate (0.001 s -1 to 2500 s -1 ). A split-Hopkinson pressure bar (SHP…
The urea induced equilibrium denaturation behavior of glutaminyl-tRNA synthetase from Escherichia coli (GlnRS) in 0.25 m potassium l-glutamate, a naturally occurring osmolyte in E. coli, has been studied. Both the native to molten globule and molten globule to unfolded state transitions are shifted significantly towar…
Electron transport in electrochemically polymerized films of a bithienyl-substituted {Os(tpy) 2 } complex has been studied. The voltammetric response associated with the Os 2+/3+ process is unusually ideal under both semi-infinite linear and finite, diffusion conditions. Significantly, ac impedance results indicate th…
The electronic properties of heavily doped (1020–1021 [B]/cm3) p+ diamond epilayers have been investigated in the article [1] featured as Editor's choice of the present issue. Free holes affect strongly the room-temperature optical response of such monocrystalline films in the range of phonon energies. This is illustr…
This paper reports measurements of the dielectric response over the frequency range 102 to 109 Hz of a liquid crystal dimer consisting of two ester mesogens laterally linked by an alkoxy chain containing a siloxane group. The synthesis and phase behaviour of the siloxane dimer are also reported. Results show that ther…
This paper describes magnetic properties of Sm-Fe-N films prepared by an aerosol deposition method. The films with thickness of 3-45 /spl mu/m were obtained by the deposition within 10 min and the deposition rate was estimated as approximately 2-10 /spl mu/m/min. The Sm-Fe-N films showed relatively high micro Vickers…
In practice, partial discharge (PD) signals are corrupted mainly by narrowband noise caused by radio communications. Matched filters are very well suited for PD detection in the presence of such noise, since they exploit spectral regions with high SNR to maximize the SNR of a measured PD signal. In addition to its noi…
The Ag(I)-promoted oxidative meso-meso coupling reaction of 5,15-diaryl Zn(II)-porphyrin was serendipitously found in the course of our synthetic approaches towards photosynthetic reaction centers. Based on this reaction, a variety of directly linked and fused porphyrin arrays have been synthesized, including linear m…
Abstract This work describes the functional characterization of novel photoreplicated anisotropic lenses obtained from molds with different curvatures. These lenses were prepared by the photopolymerization of mixtures of a reactive liquid‐crystalline bisacrylate and non‐reactive derivatives of liquid‐crystalline cyano…
Abstract The copolymerization of six 4‐aminosubstituted‐1,8‐naphthalimide dyes comprising an allylic polymerizable group with methylmethacrylate has been investigated. The utility of the copolymers prepared as fluorescent component in polymer/liquid crystal systems has been examined. The photophysical and photochemica…
The temperature dependence of the magnetocrystalline anisotropy of PtCo and its atomic origin are investigated by first-principle and model calculations. The Pt spin moment necessary to realize the leading 5d anisotropy contribution is due to neighboring Co atoms. At finite temperatures, Co spin disorder strongly redu…
The maximum energy product of bonded magnets is advancing every year. The highest maximum energy product of any bonded magnet achieved is 25 MGOe (200 kJ/m/sup 3/) in the Nd-Fe-B system by d-HDDR treatment. There is a great demand for even higher energy bonded magnets with the desire for smaller, more efficient electr…
Abstract A modified sodium tetraphenyl‐boron method (Na‐TPB), which uses an incubation period and boiling with a copper solution to destroy the tetraphenyl‐boron‐K precipitate (TBK) instead of shaking and resolubilisation with acetone, is proposed as a replacement for Jackson's TBK method. The method as recommended is…