Materials Literature
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BspA is a basic surface-exposed protein from Lactobacillus fermentum BR11. Sequence comparisons have shown that it is a member of family III of the solute binding proteins. It is 89% identical to the collagen binding protein, Cnb, from Lactobacillus reuteri. Compared with the database of Escherichia coli proteins, Bsp…
Change of electronic and lattice structures upon the orbital and charge-ordering (OO-CO) transition has been investigated for a single-layer manganite crystal of ${\mathrm{La}}_{1/2}{\mathrm{Sr}}_{3/2}{\mathrm{MnO}}_{4}.$ The optical birefringence signal probes the orbital-ordering-induced anisotropy in the originally…
An electromigration model is developed to simulate the reliability of Al and Al–Cu interconnects. A polynomial expression for the free energy of solution by Murray [Int. Met. Rev. 30, 211 (1985)] was used to calculate the chemical potential for Al and Cu while the diffusivities were defined based on a Cu-trapping mode…
The oil resistance behavior of polystyrene thermoplastic vulcanizates (TPVs) such as polypropylene (PP)/polystyrene block copolymer (SBC) systems were investigated using a dynamic mechanical spectrometer (DMS) and transmission electron microscopy (TEM). Testing oils used were paraffinic oil, ASTM oil #3, an automobile…
The (001) surface of natural pure margarite was chemically characterized by angle-resolved Xray photoelectron spectroscopy (ARXPS). The extreme surface sensitivity of ARXPS permits concluding that the chemical composition of the near-surface region differs from the bulk because of the strong anisotropy of the margarit…
We report x-ray photoemission spectra for a CaCO3 filled poly(vinyl chloride) (PVC) polymer with dioctyl pthalate plasticizer. XPS spectra were acquired with a SSI model SSX-100 instrument using monochromated Al Kα x-rays. We present the survey spectrum (binding energy 0–1000 eV) and a narrow spectrum of the C 1s, O 1…
We report x-ray photoemission spectra for a poly(propylene)(PP) homopolymer. XPS spectra were acquired with a SSI model SSX-100 instrument using monochromated Al Kα x-rays. We present the survey spectrum (binding energy 0–1000 eV) and a narrow spectrum of the C 1s photoelectron peak.
Adverse effects from the usage of plasticisers and diluents in the manufacture of flexible poly(vinyl chloride) (PVC) products have recently received increased environmental concern. As a consequence there is a lot of work in progress to find more environmentally friendly systems and/or systems that can reduce the con…
Formation of lead niobate pyrochlores by the reaction of PbO with Nb 2 O 5 in various molar ratios and at various temperatures has been investigated. It has been shown that for a PbO/Nb 2 O 5 molar ratio between 1.5 and 3.0, a pyrochlore solid solution having cubic symmetry is formed at low temperatures (∼500‐600°C).…
Abstract This paper presents a short overview of the background to EP additives and their operating mechanism in relation to temperature activation, in the formulation of water‐miscible metal working fluids. The physical and chemical properties, determined using standard laboratory equipment, and dynamic tests, of dif…
A theory of the central peak line shape in Raman scattering in ferroelectrics above ${T}_{c}$ is developed. Off-center ions are considered as a possible source of the local symmetry breaking. We argue that in order to properly describe the features of the central peak line shape above ${T}_{c}$ one should take into ac…
Growth of calcareous deposits on stainless steels (SS) exposed to seawater under cathodic protection (CP) conditions was examined. CP was performed by galvanic coupling with iron, zinc, or magnesium anodes. The influence of the galvanic coupling period on the temporal evolution of localized corrosion susceptibility wa…
GaSb:Te and GaInSb samples have been solidified under microgravity conditions during the D2 Spacelab mission. Experimental design and parameters are described. Analysis of the thermal data taken during the flight, associated to numerical simulations of heat transfer in the experiment, with the help of FIDAP, gave the…
The oxygen permeation flux measured as the oxide ion current density through was determined at steady state by using an electrochemical method in the range from to at T = 1273 K. The oxygen vacancy diffusion coefficient is estimated to be in the region from 1 to . When is lower than , seems to depend on a surface reac…
The IR and Raman spectra of two singly layered silicates, silinaite and makatite, have been investigated. The vibrational spectra were assigned based on previous studies of various silicates. The correlation between vibrational modes and the structural properties of silicates under investigation has been made. The IR…
An isothermal section of the Fe-Al-Co system at 923 K is experimentally investigated by means of transmission electron microscopy, energy dispersive spectroscopy, scanning electron microscopy and X-ray diffraction. In the Co-rich side, (A2+B2+A1) three-phase and (A2+B2) two-phase fields exist in addition to the (A2+A1…
Abstract Lauroylamidopropylbetaine (LPB) has good cleaning and foaming performance with excellent low skin irritation. We have investigated the relationship between cleaning performance and foaming properties of aqueous solutions containing binary and ternary LPB/nonionic surfactant systems. Foaming properties were ev…
Here we report a theoretical study of chiral nematic liquid crystals, confined to cylindrical cavities with planar anchoring conditions. Three different model structures are considered: radially twisted, eccentric radially twisted, and axially twisted structure. The Frank-Oseen free energy with additional surface ener…
LAYER is a 32-bit Microsoft Windows-based program that reads intensity data in SHELX type 4 format and displays any level of the reciprocal-lattice net. The program is primarily intended for instructive purposes, but may also prove useful as a visual complement to statistically based numeric analysis of diffraction da…
The expansion behavior of bubbles in silica glass concerning Czochralski silicon crystal growth has been investigated. It is found that most of the bubbles expand considerably under an Ar atmosphere of 20 Torr and 1500°C. The bubble expansion can be classified into three groups. The first group shows huge expansion wh…