Materials Literature
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Abstract The energy of intervalley Jahn‐Teller effect (IVJTE) accompanying the O –C phase transition in (GeTe) 1– x (AgSbTe 2 ) x solid solutions ( x = 0.06) is calculated on the base of a band‐edge structure model of the group IV‐tellurides with T–L splitting in the rhombohedral phase. The heat effect of the transiti…
Abstract IR‐reflection spectra of sheelite‐type crystals, XMeO 4 , where X = Ca, Pb: Me = Mo, W, and solid solutions on their basis are investigated. The obtained spectra are treated under the program: dispersion oscillator model – Kramers‐Kronig analysis. Frequency evolution and the decay of natural vibrations by sub…
(1984). Practical High Efficiency Tungsten-Halogen Lamps Using IR Reflecting Films. Journal of the Illuminating Engineering Society: Vol. 14, 1984 IES Annual Conference papers, pp. 165-174.
The precursors of secretory proteins were synthesized in a reticulocyte lysate system programmed with rat serum albumin or human placental lactogen mRNA and their interaction with phospholipids in liposomes was studied. The precursor proteins could bind to acidic phospholipids that have an exposed phosphate such as di…
Quenched Ni-Mn alloys exhibit both a spin-glass state and ferromagnetism for Mn concentrations (${c}_{\mathrm{MN}}$) below 26 at.%. While previous studies concentrated on understanding various aspects of the magnetic properties (hysteresis, field cooling effects, anisotropy, spin waves, etc.), the present study focuse…
A survey over three different approaches to model hysteresis phenomena is given. The starting point for mathematical models are (a) memory, (b) population, or (c) spatial distribution. In any case the hysteresis effect is interpreted using an averaging procedure over the inner state of the system in consideration.
Abstract Die neue Verbindung Ba 2 Ge 2 Te 5 kristallisiert orthorhombisch in der Raumgrupe Pna2 1 (Nr. 33) mit den Gitterkonstanten In der Struktur sind trigonale Ge 2 Te 6 ‐Prismen über gemeinsame Ecken zu eindimensional unendlichen Ketten verknüpft.
Abstract The ring‐opening polymerization of 3,5‐anhydro‐1,2‐ O ‐isopropylidene‐α‐ D ‐xylofuranose was studied to investigate the selectivity of ring‐opening mode under various polymerization conditions with a number of Lewis acids, anionic and coordinated catalysts. In all the conditions attempted here, the monomer at…
A study has been carried out to determine the thermal insulating properties of expanded vermiculite mineral in the form of loose particles and in the form of compressed vermiculite boards. Measurements show that the thermal con ductivity of the loose vermiculite particles is in the range of 0.0633-0.0738 w/(m °C) and…
As microvascular surgery has developed, the necessity for smaller arterial prostheses of less than 2 mm in internal diameter (ID) has increased markedly. Glutaraldehyde-stabilized human umbilical arteries with 1.5 to 2.0 mm ID are smaller than any other graft material currently available. This study was designed to de…
Fission product fractional release rates, K, used in the Albrecht-Wild model and measured at Kernforschungszentrum Karlsruhe and Oak Ridge National Laboratory can be fitted well by a single straight line for each fission product over the entire temperature range of the data when ln K is plotted as a function of 1/T. P…
We present direct measurements of the temperature of shock-loaded polymethylmethacrylate (PMMA) in the 0.5 – 3.0-GPa range. The experimental technique is based on embedding a very thin (1 μm thick or less) copper thermistor in the shocked sample and recording its resistance changes during the 5–8 μs of a dynamic exper…
Abstract The chemical ionization mass spectra of some tert ‐octylphenol ethoxylates and linear alcohol ethoxylates have been determined using methane and ammonia as reactant gases. Proton, [C 2 H 5 ] + and [C 3 H 5 ] + adducts were observed with attachment on the ring as well as on the oxyethylene chain for the tertia…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEntrapment of functionalized ethylene oligomers in polyethyleneDavid E. Bergbreiter, Zonghan Chen, and Ho Pin HuCite this: Macromolecules 1984, 17, 10, 2111–2116Publication Date (Print):October 1, 1984Publication History Published online1 May 2002Published inissue 1 October…
A series of electroactive polymers was synthesized by incorporating pendant anthraquinone groups on a polystyrene backbone. The spacing between electroactive groups and the overall chain length were varied independently. Symmetrical, reversible cyclic voltammograms were obtained from polymer solutions. Linear plots of…
The influence of octahedral replacement of Al3+ by Fe3+ on the infrared spectra of montmorillonites in the domain of OH vibrations is presented. The obtained results suggest that in the domain of OH-bending vibration, the absorption band from 870 cm−1 (Al3+ -OH-Fe3+) can not be detected in the spectra of montmorilloni…
Abstract The temperature dependence of the fundamental absorption edge of SbSI is studied in the range 320 to 5 K. In the paraelectric phase the edge is described by the Urbach's rule. The pertinent parameters of the ferroelectric phase are found to be temperature dependent. The influence of spontaneous polarisation o…
The Zr-2.5 wt% Nb pressure tubes used in CANDU reactors are manufactured via hot extrusion, followed by cold-working. This manufacturing process causes the crystallographic structure of the alloy to be strongly textured and the grains to be elongated in the axial direction. The mechanical properties are consequently a…
The dependence of grain‐boundary resistivity and resistance per square centimeter of grain‐boundary surface on grain‐boundary density (D) in yttria‐stabilized zirconia was investigated using reported data. The grain‐boundary resistivity increased with increasing D in the high‐D region but was independent of D in the l…
SUMMARY The amounts and rates of release of the different categories of soil K were measured on 21 soils from field experiments in England, Wales and West Germany using a calcium saturated cation exchange resin. The soils contained various amounts of exchangeable, fixed and matrix K; some contained no fixed K at all.…