Materials Literature
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The (001) surface of tungsten trioxide has been examined with ultraviolet photoemission spectroscopy. Results are presented for the defect-free surface using photon energies of 16.85, 21.22, and 40.82 eV and compared with x-ray photoemission spectra and a bulk density of states calculated for cubic W${\mathrm{O}}_{3}$…
A new model is proposed for explaining the nonlinearity in the response characteristics of three common thermoluminescent phosphors (CaSO 4 :Dy, CaF 2 :Dy and Mg 2 SiO 4 :Tb). The increased trapping of charge carriers in the dosimetry traps during irradiation, due to a reduction in trapping efficiency of deep traps ca…
Reports measurements of electron emission yields of clean molybdenum surfaces under bombardment with H + , H 2 + , D + , D 2 + , He + , N + , N 2 + , O + , O 2 + , Ne + , Ar + , Kr + and Xe + in the wide energy range 0.7-60.2 keV. The clean surfaces were produced by inert gas sputtering under ultrahigh vacuum. The res…
Abstract Das Prinzip der Kautschuk‐Modifizierung von Thermoplasten wird kurz erläutert. Berichtet wird über die Elastifizierung von Polybutylenterephthalat, Polyamiden und Polycarbonaten mit Butadienpfropfpolymerisaten. Die Kerbschlagzähigkeit, insbesondere bei tiefen Temperaturen (−40°C), wird erheblich verbessert, o…
Viscosities of several compositions in the albite‐anorthite system (Ab 80 An 20 , Ab 50 An 50 , and Ab 25 An 75 ) were measured over a wide range of temperature (800°–1600°C). The log η versus 1/ T relations for all compositions show continuous curvature. In the high‐temperature region ( T >1200°C) the viscosity in…
Discommensurations and dislocations in the incommensurate charge-density-wave structure of $2H$-Ta${\mathrm{Se}}_{2}$ have been observed directly by dark-field transmission electron microscopy with use of satellite reflections produced because of the phase transition. We have imaged the domain structure in the striped…
About 25 000 tons of RE Metals - calculated as oxide - are currently consumed in the world per year. This quantity is divided among a dazzling variety of applications. In order to bring a certain systemization into this variety, these applications and possible applications have been reviewed from 3 different aspects:…
The emergence of new titanium fabrication techniques has opened up new possibilities for achieving high structural efficiency at considerably reduced costs. Superplastic forming/diffusion bonding (SPF/DB), combined with conventional metallurgical joining techniques, has been shown to effect weight reductions in future…
When crosslinked polyester-cotton blend fabrics came into general use about fifteen years ago, problems of soil retention that are inherent with these fabrics were soon recognized. Many studies were conducted to identify the factors responsible for soiling and soil retention in blends, and to develop finishes capable…
Maxima and minima are tabulated for the Bessel functions Jn(x) for values of n from 0 to 30 [i.e. zeros of J'n(x)]. The first six points are recorded for each function. The table considerably extends the range of earlier tables available in the literature. It should have applications in the interpretation of diffracti…
Belterra Clay is a uniform, yellowish kaolinitic clay lacking visihle stratification. It overlies laterite plateaus with a maximum thickness of 20 m. The clay is derived from a lateritic terrane occuring outside and within the Amazonian bauxite belt. Redistribution of clay material from the basal layers of the laterit…
p-n-alkoxycinnamoyl cholrides when treated with p- hydroxyacetophenone yield a homologous series ofmesogens. The first member is a monotropic nematogen; exhibition of enantiotropic nematic mesophase begins from the second memeber and persists up to the butyl derivative. Both smectic and nematic mesophases are exhibite…
The stability of a spherical bubble in a two-component two-phase system is examined by employing the thermodynamic theory of dilute solutions. It is shown that a bubble can remain in a state of stable equilibrium provided that the ratio of the total number of moles of the solute to the total number of moles of the sol…
Used coils from a hydro-generator and an induction motor both in operation for many years, and also model coils subjected to accelerated agings were examined concerning the correlationship between the residual breakdown voltage VR and two nondestructive measurements Δ and Qm. It was found that VR could be expressed by…
Surface photovoltage spectra of clean (110) surfaces cleaved from n-type GaAs crystals doped with Te or Si exhibit two narrow peaks at 0.72 and 0.89 eV superimposed on a broad shoulder extending from h/ω≊0.7 eV to Eg. Both peaks are strongly increased by chemisorption of oxygen and by increasing the band bending. The…
A description is given of the present status of studies on the Peierls transition, which is a metal-insulator transition characteristic of an electronically one-dimensional system. Fundamental properties of a one-dimensional electron system are discussed and the concept of charge-density wave is explained. Physical pr…
Abstract Large circular dichroism is induced when Methyl Orange is bound to the bilayer membrane of chiral dialkyl amphiphiles and the magnitude of the induced circular dichroism is changed drastically by the gel-to-liquid crystal phase transition and the chemical structure of the membrane.
Abstract Four bands occur in the Mössbauer spectra of pelletal glauconites ranging in age from Cambrian to Oligocene. Components due to Fe 3+ in the cis M(2) positions are visible in all the spectra but their shapes depend on the expanding layer content. In the spectrum of the Oligocene glauconite a very well-develope…
Abstract Temperature dependence of resistance of carbon black loaded ethylene‐vinylacetate (EVA) copolymer was studied from −100 to 250°C in a modified differential scanning calorimeter (DSC) apparatus. Both room temperature resistivity and positive temperature coefficient of resistance (PTC) effects can be correlated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of axial interaction in high-spin iron(III) porphyrins. Paramagnetic anisotropy and zero-field splitting in (tetraphenylporphyrin)iron(III) thiocyanate and iodideD. V. Behere, Roshun Birdy, and Samaresh MitraCite this: Inorg. Chem. 1981, 20, 9, 2786–2789Publication Da…