Materials Literature
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The excess carbon of various polysilazane precursors with varying carbon contents was investigated using 13 C MAS NMR, Raman and ESR spectroscopies, and microwave conductivity measurements. Microstructure characterization was investigated using TEM. The collected data were compared with those from a previous study on…
Author: Kraft, O. et al.; Genre: Journal Article; Issued: 2002-05; Keywords: MPI für Intelligente Systeme; Ehemalige Abt. Arzt; 14-ar_2002; fatigue; thin films; size effect; Title: Fatigue behavior of polycrystalline thin copper films
Abstract The miscibility evolution of polycarbonate/polystyrene (PC/PS) blends during the compounding process in three blending methods of industrial relevance, namely melt blending, remelt blending in a twin‐screw extruder and third melt blending in an injection molding machine, was investigated by measuring their gl…
Microbiology Society journals contain high-quality research papers and topical review articles. We are a not-for-profit publisher and we support and invest in the microbiology community, to the benefit of everyone. This supports our principal goal to develop, expand and strengthen the networks available to our members…
This study deals with the morphology, taxonomy and distribution of species belonging to the diatom genus Thalassiosira found in the marine waters along the northern coast of San Matias Gulf, Argentina. Net samples were collected from the surface layer of the water column at Punta Orengo, Las Garzas, Banco Reparo, Los…
The separation of hydrogen isotopes is an essential element for tritium processing systems. A new process invented at the Savannah River Site, has been developed at Valduc facility: Thermal Cycling Absorption Process. This system uses palladium packed in a column to absorb a stream of hydrogen isotopes. By repeated he…
Baumstarkite is a new mineral found coating miargyrite from the San Genaro mine, Huancavelica Department, Peru. It is triclinic and the third naturally occurring modification of AgSbS 2 besides monoclinic miargyrite and cubic cuboargyrite. The composition is usually close to the ideal formula. However, some grains of…
Perovskite-type complex ferrite La1—xSrxFeO3 (x = 0–0.3) nanoparticles of different particle sizes were prepared using the sol–gel method. The influence of the Sr content and particle size on the microstructure and magnetic properties has been investigated. Increasing Sr content and increasing particle size lead to la…
Five new organic volatile corrosion inhibitors (VCI) were synthesized using 1,6-diaminohexane with various acids such as cinnamic acid (C9H8O2), nitrobenzoic acid (C7H5O4N), phthalic acid (C8H6O4), maleic acid (C4H4O4), and orthophosphoric acid (H3O4P), and their inhibiting action on corrosion of aluminum, zinc, and m…
Inhibition of cubic‐rhombohedral phase transformation and low‐temperature sintering at 1000°C were achieved for 10‐mol%‐Sc 2 O 3 ‐doped cubic‐ZrO 2 by the presence of 1 mol% Bi 2 O 3 . The powders of 1‐mol%‐Bi 2 O 3 –10‐mol%‐Sc 2 O 3 ‐doped ZrO 2 were prepared using a hydrolysis and homogeneous precipitation technique…
Atomistic computer modeling methods are used to investigate the surface structures and stabilities of magnesite MgCO 3 and dolomite MgCa(CO 3 ) 2 in comparison with calcite, CaCO 3 . The surfaces are generally more stable than magnesite, but less so than calcite. Upon hydration, the magnesite {101̅4} surface becomes m…
NMR determinations of fluorine environments in transparent oxyfluoride glass‐ceramics were made to learn about the crystallization of LaF 3 , as well as to ascertain the structural role of fluorine in the surrounding glassy matrix. The fraction of fluorine in LaF 3 was measured as a function of heat treatments, demons…
The study of a diffractive device for polarimetric applications is reported. The device consists of a diffraction grating recorded by two interfering opposite circularly polarized beams and is based on a Langmuir–Blodgett film of an azo-compound material. This material provides long-time stability and high photoinduce…
Abstract Baked products lose quality by loss of moisture, staling and mould growth. The objective of this study was to determine the possibility of reducing mould growth during bread storage through interaction with active packaging film. Cellulose acetate films containing 0%, 2% and 4% sodium propionate were prepared…
Redistribution reactions are used in the synthesis of several preceramic polymers. Moreover, redistributions play a major role in the pyrolysis of these precursors. Examples of thermal redistributions involving the exchange of Si—O/Si—X bonds (X = O, H, C, …) in polysiloxanes, precursors to silicon–oxygen–carbon ceram…
In conventional structure refinement, the discrepancy between the calculated magnitudes and those observed in X-ray experiments is attributed to errors inherent in preliminary assigned values of the model parameters. However, the chosen set of model parameters may not be adequate to describe the structure factors prec…
This article describes the admittance-frequency feature of a class of SnO2⋅CoO-based polycrystalline ceramics with high nonlinear current–voltage characteristics (nonlinear coefficients above 50). Broad relaxation peaks caused by the presence of deep trap states were characterized based on the admittance response of d…
Gray scale image analysis is used to evaluate visual features of wrinkles in plain fabrics made from cotton, linen, rayon, wool. silk, and polyester. The angular second moment, contrast, correlation, and entropy extracted from the gray level co-occurrence matrix are measured as visual feature parameters. The fractal d…
UNLABELLED: ENDscript is a web server grouping popular programs such as BLAST, Multalin and DSSP. It uses as query the co-ordinates file of a protein in Protein Data Bank format and generates PostScript and png figures showing: residues conserved after a multiple alignment against homologous sequences, secondary struc…
The effect of a strong electric field on the metal-insulator phase transition in vanadium dioxide was studied. It was found that the field application to a silicon-silicon oxide-silicon nitride-vanadium dioxide (Si-SiO 2 -Si 3 N 4 -VO 2 ) heterostructure shifts the critical temperature of this transition toward lower…