Materials Literature
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We propose a multi-order parameter phase field system and a sharp interface model to describe bi-directional diffusion induced grain boundary motion in the presence of triple junctions. Numerical approximations of the models are presented together with some computational results.
Abstract The time‐related cumulated noise charges extracted from the noise signals between two “identical” crevice electrodes yield a direct quantitative easy‐to‐interpret information on time‐related corrosion intensities in the crevice. A new software‐assisted method of noise data evaluation allows a “counting of cou…
Phase-separation behavior in the sol−gel system of alumina−silica (Al 2 O 3 −SiO 2 ) in the presence of poly (ethylene oxide) has been investigated. Amorphous gels with interconnected macropores can be obtained from the starting composition containing up to 10 mol % Al 3+ by inducing phase separation parallel to the s…
Abstract The mechanical and thermal properties of glass bead–filled nylon‐6 were studied by dynamic mechanical analysis (DMA), tensile testing, Izod impact, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) tests. DMA results showed that the incorporation of glass beads could lead to a subs…
Structural features and methods for the synthesis of complex manganese oxides with the brownmillerite structure A2MnB'O5+δ (A = Ca, Sr; B' = Ga, Al) and of their derivatives are surveyed. Modern approaches to the description of crystal structures containing various types of chains of tetrahedra are considered and poss…
Abstract The effects of two compatibilizing agents, polystyrene–poly(ethylene butylene)–polystyrene copolymer (SEBS) and SEBS‐grafted maleic anhydride (SEBS‐ g ‐MAH), on the morphology of binary and ternary blends of polyethylene, polypropylene, and polyamide 6,6 were investigated with scanning electron microscopy and…
The lines of research in the field of inorganic chemistry that are closely related to the design of novel functional materials are analysed. Special attention is given to areas of inorganic materials chemistry that have been developed most intensely at the Division of Inorganic Chemistry of the Department of Chemistry…
The thermal decomposition of dimethyl methylphosphonate (DMMP), which is a simulant molecule for organophosphorus nerve agents, has been investigated on Cu clusters as well as on Cu films deposited on a TiO(2)(110) surface. Scanning tunneling microscopy studies were conducted to characterize the cluster sizes and surf…
Abstract The softening of the wood polymers is very important in the utilization of wood fiber products. To better to understand how the hemicelluloses interact with the other wood polymers in the fiber ultrastructure and contribute to the mechanical properties of the wood, their softening inside the cell wall of pulp…
The luminescence of synthetic rare earth (RE)-doped zircons and three natural zircons has been studied by ion beam excitation (ion beam luminescence or ionoluminescence (IL)). Luminescence results from electronic transitions between energy levels of the RE ions, giving emissions with characteristic energies. Studies o…
An essential property of combustion catalysts is long-term (>8000 h) stability at high temperatures in an environment (approximately 1 atm of both oxygen and water vapor) that aggressively promotes sintering of the supporting oxide and coarsening of the active component. Extrapolation of accelerated coarsening rate me…
Abstract In this article, the graft copolymerization of methyl methacrylate (MMA) onto sago starch (AGU) was carried out in aqueous medium using potassium persulfate (PPS) under nitrogen gas atmosphere. The maximum percentage of grafting achieved was 90% under optimized conditions of reaction temperature, monomer, PPS…
Abstract The presence of naphthalene, phenol and benzoic acid derivatives in natural waters constitutes a public health issue. The toxicity and chemical activity of these chemicals and their persistence in the environment depend on the types of functional groups attached to their basic aromatic structure. Surface‐enha…
Whereas tetrahydrofolate is an essential cofactor in all bacteria, the gene that encodes the enzyme dihydrofolate reductase (DHFR) could not be identified in many of the bacteria whose genomes have been entirely sequenced. In this communication we show that the halophilic archaea Halobacterium salinarum and Haloarcula…
The absorption of dyes within hydrogen-bonded and electrostatically assembled multilayers and subsequent release of the dyes from the films were studied in situ using FTIR-ATR. Multilayers were composed of poly(methacrylic acid), PMAA, and poly(ethylene oxide), PEO (hydrogen-bonded multilayers), or of PMAA and 22% qua…
Abstract Summary: New epoxy materials are needed with low dielectric constants ( Dk or ε r ), low loss ( Df or tan δ ) in the giga‐hertz frequency range and high glass transition temperatures ( T g s) for next generation fiber reinforced printed circuit boards. In this work, the incorporation of adamantane into an epo…
Abstract Ausgehend von den Ursachen, den Quellen des elektrochemischen Rauschens, wird an mehreren Beispielen die gute Korrelation zwischen verschiedenen Systemparametern und den Rauscherscheinungen gezeigt. Bei Beachtung einiger Randbedingungen bieten sich sehr gute Möglichkeiten, das Rauschen für eine Art Frühwarnsy…
The fundamental principle underlying the selective catalytic reduction (SCR) of NO x to N 2 is the promotion of reactions of reductant with NO x over competing, and thermodynamically preferred, reactions with a large excess of O 2 . A similar competition between NO x and O 2 exists in the noncatalytic, thermal reducti…
The behavior of ammonia absorption and desorption was studied for CaCl 2 −CaBr 2 halide mixtures with various molar ratios prepared via the aqueous solution method. The CaCl 2 −CaBr 2 halide mixture was revealed to form solid solutions in any molar contents. Ammonia absorption abruptly increased at some pressure, form…
A series of N-confused tetraphenylporphyrins (H(2)NCTPPs) with substituents on either the para- or the 3,5-positions of the meso phenyl rings were prepared using Lindsey conditions. Both electron-withdrawing and electron-donating groups were chosen in order to probe the effects of peripheral substitution on the proper…