Materials Literature
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The temperature dependence of the elongation per unit length for Pb(Mg 1/3 Nb 2/3 )O 3 crystals unannealed after growth and mechanical treatment is investigated in the course of thermocycling. It is revealed that this dependence deviates from linear behavior at temperatures below 350°C. The observed deviation is chara…
This paper deals with an analysis of debris produced during the polishing of diamond. The debris is carefully collected 'as ejected' to shorten the history of the freshly removed material. Using high-resolution electron microscopy as well as electron-energy-loss spectroscopy, the structure of the material is revealed…
In order to investigate the influence of dissolved hydrogen on the oxide film and primary water stress corrosion cracking (PWSCC) of Alloy 600 in primary water of PWR under actual operating temperature range, electrochemical polarization measurement, analysis of the oxide film on the alloy and PWSCC test were carried…
Functionalised thin films of copolymers of acrylic acid and 1,7-octadiene have been deposited by plasma-co-polymerisation to create a range of surfaces of well-defined chemistry, containing carboxyl functional groups. X-Ray photoelectron spectroscopy (XPS) has been used to characterise the deposits. Adsorption of immu…
A total of 800 samples was taken from Taegu province, Korea, where many textile factories provide a source of polyvinyl alcohol (PVA) waste. These samples were screened for PVA-degrading bacteria. A new strain, SA3, was discovered which formed yellow colonies and used PVA as the sole carbon and energy source. Strain S…
A microcellular foam plastic part made by an injection molding method can be treated as a sandwich structure in which a foamed core is encased by a skin frame. The morphology, fiber orientation, and the cell structure of the part are the key factors for the final part properties. It has unique characteristics for a mi…
Abstract Sorghum wax, sorbitol, glycerin, and soy protein isolate (SPI) composite films were prepared. Effects of sorghum wax, sorbitol, and glycerin concentrations on various films were evaluated using response surface methodology. All independent variables significantly ( P <0.05) affected film water vapor permea…
Protection of Steel Against Corrosion in Aggressive Medium by Surface Modification with Multilayer Polyaniline-Based Composite Film , Galkowski, Mariusz, Malik, Marcin A., Kulesza, Pawel J., Bala, Henryk, Miecznikowski, Krzysztof, Wlodarczyk, Renata, Adamczyk, Lidia, Chojak, Malgorzata
Although the presence of an enzyme that catalyzes beta-decarboxylating dehydrogenation of homoisocitrate to synthesize 2-oxoadipate has been postulated in the lysine biosynthesis pathway through alpha-aminoadipate (AAA), the enzyme has not yet been analyzed at all, because no gene encoding the enzyme has been identifi…
A new type of lanthanide complex with a derivative of β-diketone and phenanthroline, LnPhβ3·Phen [where Phβ = CCl3–C(O)–N–P(O)–(OCH3)2; Phen = 1,10-phenanthroline, Ln = Sm, Eu, Gd, Tb] was synthesised. The X-ray diffraction analysis of the Sm(III) complex shows that it is in the monoclinic system and P21/c space group…
The colorless salts [C5H10NH2][AuI(CN)2], [C4H8NH2][AuI(CN)2], [Ph2NNH3][AuI(CN)2]·H2O and [(n-C3H7)4N][AuI(CN)2]·H2O have been prepared by evaporation of aqueous solutions of potassium dicyanoaurate and the chloride salt of the appropriate cation. Hydrogen bonding between the cations and the cyano groups of the anion…
The response of a solid oxide fuel cell towards waste ammonia has been studied using a small tubular solid oxide fuel cell system, since ammonia is present in certain biogas in large quantities as a breakdown product of biological waste. SOFCs are not only tolerant to ammonia, but can actually utilise the ammonia pres…
For the first time, a periodicity of 14 Å is recognized as a typical modulation period in metakaolinite. Energy‐filtered electron diffraction data confirm that dehydroxylation does not occur abruptly in kaolinite. The degree of ordering becomes much lower during the progression of dehydroxylation in metakaolinite than…
Introduction Basalt is a natural material that is found in volcanic rocks. It is mainly used (as crushed rock) in construction, industrial and high way engineering. One can also melt basalt (1300-1700°C) and spin it into fine fibres. [1-3,5-6,8] When used as (continuous) fibres, basalt can reinforce a new range of (pl…
The dc electrical conductivity of 60 V2O5–(40 – x)B2O3–xBaO (x = 15, 20, 25, 30 and 40 mol%) glasses is reported in the temperature range 300–523 K. The physical and transport properties such as density, number of ions per unit volume, hopping distance, polaron radius and activation energy are reported. The electrical…
We show that the commonly accepted measurement of the critical potential for alloy dissolution calculated based on extrapolation of anodic polarization data results in an overestimation of this quantity. A series of constant applied potential experiments prove to be a more accurate method for critical potential determ…
Several approaches were investigated to produce monosort functionalized polymer surfaces with a high density and homogeneity of functional groups: (i) Plasma oxidation followed by wet-chemical reduction, (ii) formation of radicals and grafting on of functional group carrying molecules, (iii) plasma bromination followe…
The identity of three naviculoid diatoms originally described by Ehrenberg and now placed in the genus Placoneis was investigated. Type specimens and material from both the Ehrenberg Collection (Berlin) and the diatom collection at the Natural History Museum, London, were examined with LM and also SEM where possible.…
4R/S-Aminoprolines when present in the X-position of collagen peptide [pro(X)-pro(Y)-Gly]n exhibit pH- and stereochemistry-dependent effects on triplex stability.
We present computer simulations of long, thin, hard spherocylinders in a narrow planar slit. We \nobserve a transition from the isotropic to a nematic phase with quasi-long-range orientational order \nupon increasing the density. This phase transition is intrinsically two-dimensional and of the \nKosterlit…