Materials Literature
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Abstract Three soil profiles classed as brown forest soils on schistose parent material, in close proximity but under different land uses, have been studied. The profile under 50 year-old Sitka spruce trees is the most acidic, the second profile under rough grassland is less acidic, and the third profile in an arable…
Nanostructured cadmium sulfide thin films were deposited on SiO2 by a cold-wall low-pressure CVD reaction system starting from the single-source precursor Cd(O-iPrXan) 2 [O-iPrXan = S2COCH(CH3) 2]. Deposition experiments were carried out in an inert nitrogen atmosphere in optimized pressure/gas flow conditions. The ob…
Abstract X‐ray photoelectron spectroscopy (XPS) has been used to probe the nature of silk fibroin surface, in particular the tyrosine content and sulfur species on the surface. The iodine labelling treatment of silk, followed by XPS surface analysis, reveals that silk fibroin has a tyrosine‐enriched surface, and that…
Abstract The intercalation of europium ions (Eu 3+ ) into the interlayer space of a layered silicate, magadiite, was conducted by ion-exchange reactions between magadiite and europium(III) chloride. X-ray diffraction and elemental analysis results indicated that Eu 3+ cations were intercalated into the interlayer spac…
Abstract The alcoholysis of PET with diols in the presence of dibutyltinoxide was carried out in a twin‐screw extruder with residence times of 1 min and without solvent. The reaction led to scissions of PET chains and to the synthesis of oligoester α,ω‐diols with average number molecular weights of about 1000 g·mol —1…
This paper reviews unobscured multiple-mirror imaging designs ranging from two to many mirrors, the ranges of operating conditions of each configuration, their strengths and limitations, and areas of application.
Article Redetermination of the crystal structure of calcium sulphate dihydrate, CaSO4 · 2H2O was published on December 1, 2002 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 217, issue 1).
The influence of the micro alloying elements B, Ti and Nb on the recrystallization texture and mechanical properties of iron aluminium light-weight steels, particularly with reference to their improved deep drawing properties was investigated. Depending on the combination of the alloying elements the microstructures o…
Thin films of As30 Te70-x Gax, where x = 0.5, 1, 3, 6 and 10 are depositedon glass substrates by vacuum evaporation. The transmittance and absorbanceof the as-deposited films were measured in the spectral range 400-1100nm. Thedependence of the absorption coefficient on the photon energy is well describedby the relatio…
The structure of polysiloxane chain generated by the quenched cationic ring-opening polymerization (CROP) of 2,2-diphenyl-4,4,6,6-tetramethylsiloxane ( 1 ) initiated by trifluoromethanesulfonic acid was studied 1 by 29 Si NMR and by statistical methods. The sequential analysis was performed at the pentad level using t…
Article Redetermination of the crystal structure of calcium sulphate dihydrate, CaSO4 · 2H2O was published on December 1, 2002 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 217, issue JG).
Abstract The products and mechanism of the thermal oxidative degradation of poly(ethylene oxide) at 150 °C have been analysed using 13 C NMR spectroscopy. The analysis was assisted by the use of distortionless enhancement by polarisation transfer spectra, longitudinal relaxation time measurements, long‐range 13 C 1 H…
Abstract Partially hydrogenated soybean oil, referred to as soywax, is gaining attention as a renewable and biodegradable alternative to paraffin wax for use in candles. However, current soywax candles suffer from several problems, especially poor melting and solidification properties. Fully hydrogenated soybean oil e…
number of planar silicon light-emitting devices are designed and realized in standard 1.2 and 2-mm complementary metal oxide semiconductor (CMOS) integrated circuitry. The devices yield optical power intensities of up to 0.2 mW/cm2 (up to 0.2 nW per 100 mm2) at operating voltages from 4 to 31 V and at currents of 0.1…
Abstract The copolymerization of 1,8‐naphthalimide derivatives (as fluorophore) with acrylonitrile has been investigated. The photophysical characteristics of monomeric and polymeric fluorophores in N , N ‐dimethylformamide solution have been determined and discussed. During copolymerization, no changes in the chromop…
This paper presents a combined finite-element and analytical modeling technique for the prediction of force-density harmonics in salient-pole synchronous machines. The model calculates the induced currents in the damper winding cage and includes their effect on force-density components in the solution. Use of a combin…
The effect of gamma-radiation doses (5, 10, 30 kGy) on the mechanical properties, gas and water vapour permeability, infrared (IR) spectra, and overall migration into aqueous and alternative fatty food simulants of commercial monolayer flexible packaging films ethylene vinyl acetate (EVA), high-density polyethylene (H…
The dielectric properties of silicon carbide SiC have been measuredusing cavity perturbation technique. Three tubes with diameter 2 mm, 3 mm,and 5 mm were filled with the powerful material of SiC. The measurementswere taken for each tube at different frequencies 0.615 GHz, 1.412 GHz, 2.214GHz, 3.017 GHz and 3.820 GHz…
Porphyrins and phthalocyanines have now been assembled in a multitude of different architectures, each of which may be identified with a different scenario of the coupling acting between the porphyrins. The synthetic flexibility of these compounds makes possible the design of particular molecules for specific applicat…
The synthesis of refractory Mg‐Al spinel aggregates from bauxites and magnesias was addressed by applying the alumina–magnesia–silica ternary equilibrium phase diagram as the fundamental basis. Four different alumina sources (bauxites) and four different magnesia sources were investigated. These were fired in air thro…