Materials Literature
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The influence of phosphate (P) on the adsorption‐desorption of zinc (Zn) and on Zn fractions was examined for four variable charge soils. The soils were two kaolinitic Alfisols and two Andisols containing high amount of amorphous materials. Zinc adsorption‐desorption isotherms were produced using a batch protocol invo…
Abstract The stabilization effect of alkyltin thioglycolates was determined by the measurement of discoloration of PVC formulations. The results were interpreted considering the structure of these compounds, their equilibration with alkyltin chlorides, and their postulated association with chlorine atoms at PVC primar…
<div class="htmlview paragraph">Carbon canisters have been adapted for automobile use since the early 1970s to control evaporative emissions. Stringent emission regulations and the requirement for an enhanced evaporative emissions test procedure, make this an important issue. The air and evaporative fuel from th…
A new method is used in measuring the linear thermal expansion coefficients in composite consisting of a substrate Gd 3 Ga 2 Ga 3 O 12 (GGG) and its epitaxial layer Y 3 Fe 2 Fe 3 O 12 (YIG) within the temperature range 13.88 °C–32.50 °C. The results show that the thermal expansion coefficient of GGG in composite is la…
The crystal structure of gillulyite Tl 2 (As, Sb) 8 S 13 was reinterpreted based on the average structure determined by Foit et al. (1995). It consists of alternating PbS-like slabs comprised of As-S polyhedra and Tl-bearing slabs with partly zeolitic properties. In the latter, TlS 5 and As 2 S 5 groups alternate regu…
Anatomical compatibility with the thoracic cavity is important in developing a completely implantable total artificial heart (TAH). The purpose of this study was to examine the optimal morphology of our TAH and to develop a computer implantation simulation environment for preoperational discussion. As the first stage,…
The high intensity of concentrated solar radiation obtained with the Odeillo (France) solar furnace facilities can be used to produce carbon nanotubes by direct vaporization of carbon bi-metal targets under inert gas atmosphere. Electron microscope pictures and Raman spectra show that the structure of the produced car…
A method that permits aberration correction and wave-front reshaping with a diffractive optical element (DOE) is described. Two aligned DOE's made of two different dispersive materials are used. The different dispersions of the two materials in addition to freedom in choosing their thicknesses enables the chromatic ab…
Abstract Numerous factors can modify the visibility or the actual dimensions of the skin microrelief and wrinkles. To quantify these changes, several methods, including clinical and non‐invasive ones, have been proposed. This article reviews the advantages et drawbacks of all of them and lists some experimental recomm…
The structural phase transitions and the electrical behaviour of the complex perovskite PbLu1/2Nb1/2O3 have been investigated using X-ray powder diffraction, dielectric constant measurements, differential scanning calorimetry and measurement of the polarisation as a function of applied electric field. The high-tempera…
When probe chains are dispersed in a network or higher molecular weight matrix, the expectation from the reptation model is that the terminal relaxation function will narrow, due to suppression of constraint release. Previous experiments found no support for this prediction, although they relied on time−temperature su…
X-ray powder diffraction data for κ- Al 2 O 3 are reported. It was concluded that κ- Al 2 O 3 belongs to the orthorhombic crystal system with space group Pna 2 1 . The lattice parameters were found to be a =4.8351(3) Å, b =8.3109(5) Å, c =8.9363(3) Å. There are 16 Al 3+ and 24 O 2− in the unit cell, and thus the numbe…
The inhibiting effect of octadecyclamine (ODA) on chloride induced localized corrosion of austenitic stainless steel type 1.4541 (AISI 321) is described at temperatures from 150 °C and 250 °C indeaerated aqueous solutions with chloride concentrations up to 10- 1 M. Results of electrochemical (current-potentiAl-curves,…
Abstract Polarized infrared (IR) microspectrometry was used to measure the changes in infrared absorption resulting from the molecular orientation of single textile fibers. Dichroic ratios were determined from single experimental fibers subjected to incremental elongation from an unstretched to a stretched condition.…
“Raw” chicken feathers directly from a processing plant were washed with detergent and dried. Cleaned feathers were mechanically worked to separate fibrous material from the quills and ultimately classified into two components: a fibrous material suitable for further textile processing, and a residue containing large…
Abstract PVC has a significant tendency to degrade under γ irradiation. Therefore, considerable efforts have been made to improve its γ‐radiation stability. The purpose of this review is to summarize recent results in this area, with a special emphasis on the improvement of color stability of PVC‐based materials used…
This paper reports an analysis both by coincidence site lattice (CSL) categorisation and interface–plane categorisation of a large data set of grain boundary geometry in nickel. The analysis showed that whereas two-thirds of Σ3 and Σ9 CSLs were classed as having ‘special’ geometry (i.e. related to low energy), very fe…
The influence of microcells and galvanic macrocells on the corrosion kinetics of concrete-embedded steel was investigated experimentally. Nine stainless steel/carbon steel coplanar macrocouples in cathodic-to-anodic ratios of 0.02 to 50 were cast in concrete slabs made from cement, sand, and water in a 1:3:0.5 proport…
In this study, a novel procedure to increase the yield of the non-crosslinked, photoconductive, white form of linear poly(N-vinylcarbazole) (LPVCz) is reported. The yield of LPVCz is increased (up to 53%) by the addition of catalytic amounts of ceric ammonium nitrate as an oxidant during the electrochemical polymeriza…
A (NH4)2Sx-treated InSb(001) surface has been studied by using x-ray photoelectron spectroscopy, low-energy electron diffraction, and inverse photoemission spectroscopy (IPES). A thick sulfide layer is formed on the as-treated and annealed surfaces at less than about 400 °C. The thickness of the sulfide layer is estim…