Materials Literature
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A key feature of the scanning vibrating electrode technique (SVET) in the study of localized corrosion is that it is nonperturbing and therefore represents a spatially resolved measure of the corrosion activity in the absence of external factors. SVET probe vibrational amplitudes of μm are shown to increase the rate o…
We have applied a photoacoustic (PA) technique to study the thermal properties of porous silicon (PS) films formed on p-type Si substrates by electrochemical anodic etching with greatly different porosities (20%–60%). From the dependence of the PA signals on the modulation frequency of excitation light measured under…
Thermal diffusivity values of molten germanium and silicon were measured by a laser flash method. Simple but useful sample cell systems were developed to keep the molten germanium and silicon shape uniform for a given thickness. In the present experimental condition, it is necessary to consider the effect of not only…
We demonstrate ohmic contacts to SiC using carbon films after thermal annealing. Carbon films are deposited on 4H-SiC and 6H-SiC substrates using a radio frequency sputtering method. The carbon/SiC samples convert from Schottky behavior to ohmic behavior after annealing in the temperature range from 1150 to 1350°C. Na…
Well-ordered kaolinite from the Brazilian Amazon Region (State of Pará) was initially reacted at 60 °C with a water dimethylsulfoxide mixture. After washing and characterisation, the resulting material was washed several times with methanol and in the final step with water. The water molecules displace the previously…
This paper investigates the charge versus voltage (q-v) curves of surge corona on transmission lines. Two measurement methods of the q-v curves are proposed, and field test results are shown to validate the methods. Since the new methods do not require a charge-measuring conductor, such as a corona cage, the q-v curve…
High-density amorphous ice (HDA), made by compression of hexagonal ice at 77 K, was heated at a constant pressure of 0.81 GPa up to 183 K and its phase transition followed by displacement-temperature curves. The crystalline phases, recovered at 77 K and 1 bar, were characterized by X-ray diffraction. Pure D 2 O ice IV…
In order to examine the existence of the metal–insulator transition, structural transition and magnetostriction effect, ultrasonic velocities and attenuation measurements have been made on La0.67Sr0.33MnO3 perovskite manganite material over a wide range of temperatures from room temperature (298 K) to 460 K. The varia…
Jute yarns were treated with an alkoxy silane monomer 3-(trimethoxysilyl) propylmethacrylate under UV radiation. The monomer concentration and radiation intensity were optimized with respect to the extent of grafting and mechanical properties of the grafted (silanized) jute yarn. The enhanced tensile strength by 159%,…
This paper documents two projects funded through the Federal Highway Administration’s Innovative Bridge Research and Construction (IBRC) program. The IBRC program was developed to assist bridge owners in applying emerging technologies in bridge engineering. In these projects, the Iowa Department of Transportation empl…
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…