Materials Literature
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This paper reviews the leaching behavior of simulated high‐level‐waste glass in Japanese groundwater both on an in situ burial site and in our laboratory. During in situ burial leach tests, the glass is immersed in groundwater for up to 1 year and 7 months, retrieved, and analyzed. A leach rate obtained from the in si…
The electromagnetic behavior of a sheet winding transformer is examined. Modeling each part of this transformer presents particular difficulties. The high-voltage coil consists of approximately 3000 elementary thin conductors. A solution based on the fact that the reaction field of the high-voltage thin elementary con…
A numerical procedure for the calculation of the magnetic field of coils with open iron cores is presented. Considering that the field to be calculated is an open boundary problem with axisymmetric geometry, the boundary element method with double scalar magnetic potentials is used. The axisymmetric fundamental soluti…
Ophthalmic lens materials are characterized by their spectral transmittance and by derived luminous and average UV-B and UV-A transmittances. Photochromic materials, whose transmittances depend on previous and immediate radiant exposure and other environmental conditions, require special methods of spectrophotometry,…
The main cause of crosstalk in a rotary transformer for video cassette recorders (VCRs) is described using the axisymmetric finite-element method and by experiment. The finite-element methods support the magnetic field analysis taking into account the eddy current and the electrical circuits outside the analysis area,…
The paper presents a model of the CVD- and CVI- proceses based on the principles for the description of the gas solid reactions on the outer surface of the substrate and the inner surface of the pores. The model parameters mass transfer coefficient and rate constant of the chemical reaction at the surface were determi…
The interaction of a charged particle with a semi-infinite medium bounded by a flat surface is analyzed as a problem of metal optics. The reflection at the surface of the electromagnetic fields excited by the passing beam is investigated including retardation and spatial dispersion in the hydrodynamic approximation. T…
Chevron layer structures and focal conics in chiral smectic C liquid crystals were investigated by means of polarizing microscope observation and X-ray analysis for two kinds of cells (parallel cells and antiparallel cells) aligned on obliquely evaporated SiO film. For parallel cells, symmetric chevron layer structure…
Abstract During our investigations of the synthesis of ferroelectric liquid crystal compounds containing a fluorenone nucleus, the formation of a novel compound having a –C(O)–S-O– linkage was discovered as a by-product when a derivative of fluorenone carboxylic acid was treated with thionyl chloride and a phenol. Thi…
The spectrum of cadmium was photographed in the 300 Å-500 Å region using a sliding spark and a triggered spark as light sources. Seventeen levels of the 19 of the 4 d 7 configuration and 106 out of the 180 levels of the 4 d 6 5 p configuration of Cd VI have been established. 350 lines have been classified in the 4 d 7…
Abstract The crystal structure of (CH 3 ) 4 NTlCl 4 and (C 2 H 5 ) 4 NTlCl 4 was determined at room temperature by single crystal technique. (CH 3 ) 4 NTlCl 4 : D 2h 17 -Cmmm; Z = 2; a = 913.2pm, b = 894.6 pm, c = 752.5 pm; (C 2 H 5 ) 4 NTlCl 4 : C 6v 4 -P6 3 mc; Z = 2; a = 827.9 pm, c = 1329.8 pm. (C 2 H 5 ) 4 NTlCl…
The Fe 3+ reduction reaction was studied at Pt and polyaniline rotating disk electrodes by steady‐state and impedance methods with the aim of testing the possibility of achieving the charge transfer resistance ( R ts ) of a redox reaction mediated by a conducting polymer film by ac impedance. R ts was obtained as a fu…
Abstract The Raman spectrum of [MgCl(THF) 5 ] [FeCl 4 ] · THF includes all four Raman‐activ vibrations of the [FeCl 4 ] − anion, thus supporting the results obtained by x‐ray analysis. On the other hand, no vibration which could be assigned to the MgCl bond has been observed, which may indicate that this bond is more…
A scanning electron microscope (SEM) with an immersion-type objective lens has been developed. The objective lens generates a strong axial magnetic field of about 0.17 T at a wafer surface and has a very short focal length of about 2.5 mm. The SEM realizes an image resolution of 30 Å at 0.7 kV accelerating voltage. Th…
Polyester multifilament yams with different frictional characteristics have been air textured under both dry and wet texturing conditions. Wet textured yams are more stable and have higher bulk, and the surface structure of these yarns shows higher loop frequency, lower loop height, and a higher percentage of protrude…
Characteristics of Mg2SiO4(Tb) thermoluminescent dosimeters (TLD) were ascertained preparatory to measuring doses from diagnostic x-ray examinations received by Adult Health Study participants. These detectors are small, relatively sensitive to low-dose x-rays, and are appropriate for precise dosimetry. Extensive cali…
Abstract The crystal structure of monoclinic CuF 2 has been refined by the Rietveld method from X-ray powder diffraction data. The structure is monoclinic, space group P2 1 /n, a = 3.2973(2), b = 4.5624(3), c = 4.6157(3) Å, β = 83.293(3)°, V = 68.96(2) Å 3 , with Cu +2 at (0,0,0) and F −1 at (−0.04176(68), 0.29410(35)…
The four component condensation (4 CC, Ugi reaction) of aqueous alginic acid with formaldehyde, difunctional amine and isocyanide components produces a gel. Enzymes, e.g. “acidic phosphatase” (AP) and L-(+)-lactate dehydrogenase (LDH), can be immobilized by inclusion in the above crosslinked alginic acid. The enzymes…
Intermetallic Sm(Fe1−xCox)2 compounds having the cubic MgCu2-type structure absorb a small quantity of hydrogen from the atmosphere under normal conditions. A magnetic annealing of such samples leads to the induction of a gigantic magnetic uniaxial anisotropy, which is linked to the ordered distribution of hydrogen in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyimines from terephthalaldehyde and aliphatic diamines. 1. Synthesis, CP-MAS carbon-13 NMR spectra, and thermal analysisAlmeria Natansohn, Haixin Yang, and Carolyn ClarkCite this: Macromolecules 1991, 24, 20, 5489–5496Publication Date (Print):September 1, 1991Publication…