Materials Literature
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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…
Abstract Cesanite occurs both as a solid vein (1 cm thick) and as a cavity-filling of an explosive breccia in core samples of the Cesano 1 geothermal well (Cesano area, Latium, Italy). Cesanite is coloudess, medium to coarse grained, soft (H = 2 to 3) and light ( ρ meas 2.786±0.002 g cm −3 ). It is uniaxial negative,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMiscibility of acrylic polymers in polystyrene by melt titrationR. H. Somani and M. T. ShawCite this: Macromolecules 1981, 14, 5, 1549–1554Publication Date (Print):September 1, 1981Publication History Published online1 May 2002Published inissue 1 September 1981https://pubs.a…
The degradation of abnormal proteins produced as a result of incorporation of the arginine analog L-canavanine or generated by exposure to puromycin was studied in wild-type and multiply peptidase-deficient strains of Salmonella typhimurium. Both types of abnormal protein were rapidly degraded during growth of Pep+ st…
The cubic-tetragonal transformation driven by the elastic instability $({C}_{11}\ensuremath{-}{C}_{12})\ensuremath{\rightarrow}0$ may be followed by further rearrangements in which $\frac{c}{a}>1$ changes to $\frac{c}{a}<1$ or vice versa. These transformations are investigated by Landau theory. Unlike the cubic-…
In this overview a wide variety of pores, including gas bubbles, irradiation-induced voids, and creep cavities, are considered. The factors which govern the shape of a pore are discussed and equations from which the ultimate thermodynamic equilibrium shape of a cavity can be deduced are presented. However, it is point…
The effect of hydrogen on the apparent yield stress, which is a necessary exterior stress to cause the local macroscopic plastic deformation, was investigated for various carbon and low alloy steels with a wide range of tensile strength. Smooth tensile, bent beam, and precracked WOL specimens were used. The results sh…
Metal halide lamps are complex high temperature chemical systems which are neither closed (with respect to material flow) nor well defined thermochemically. This complexity, coupled with the commercial importance of this lamp type, has spurred the development of several models which attempt to describe the chemical (a…
Ambient and elevated temperature biaxial flexural strength were measured for polished sapphire windows. Tested for comparison were windows given an SiO or glaze surface treatment. Infrared transmittance and visible imaging quality were unaffected by surface treatment while significant increases in strength and thermal…
The interactions of metallo derivatives of macrocyclic tetrapyrrole pigments, pheophytin a (pheo), phthalocyanin (phth), and tetraphenylporphyrin (TPP) with sym-trinitrobenzene (TNB) have been studied with use of spectroscopic methods. These macrocyles form 1:l molecular complexw with the acceptor. The association con…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTraditional Medicinal Plants of Thailand. I. Isolation and Structure Elucidation of Two New Flavonoids, (2R,3R)-Dihydroquercetin-4'-Methyl Ether and (2R,3R)-Dihydroquercetin-4',7-Dimethyl Ether From Blurnea balsamiferaNijsiri Ruangrungsi, Pirnolwan Tappayuthpijarn, Payom Tan…
Embrittlement of Zircaloy-4 cladding by oxidation of the inner surface occurring in an LWR loss-of-coolant accident was studied using simulated fuel containing of A12O3 pellets sheathed in Zircaloy-4 specimen cladding, filled with Ar gas, and sealed. This simulated fuel rod was heated from outside until the isothermal…
The luminescence spectrum of Cs2NaEuCl6 has been measured at temperatures down to 5 K. Twenty-one electronic transitions between the 5 D 0, 5 D 1 and 5 D 2 excited states and ten of the crystal field states derived from the 7 FJ have been analysed. Overlapping transitions involving different excited states are disting…
The magnetization process in a cube-on-edge Si-Fe single crystal whose tilt angle θ of the [001] axis to a specimen surface is small is experimentally clarified and explained from the viewpoint of the magnetic energy. The relation between the magnetostriction and the domain structure varying with induction is made cle…