Materials Literature
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Dielectric spectroscopy is one of the most commonly used techniques for the investigation of the dynamic response of glass-forming materials. The tremendous slow-down of the particle motions when approaching the glass transition and especially the fast processes in glass-forming materials, which have come into the foc…
SUMMARIES Two samples of pure cellulose of different degree of polymerisation values were submitted to oxidation degradation by a specific agent (sodium metaperiodate) and by a non-specific agent (sodium hypochlorite). The degradation process was monitored by viscosity measurements in order to check the degree of poly…
The formation and growth of gas-made silica particles by co-agulation and sintering is investigated theoretically. A model for the characteristic time for silica sintering is proposed defining a minimum primary particle diameter above which macroscopic expressions are applied. The value of the minimum primary particle…
Abstract Scratch behavior in neat and talc‐filled high crystallinity polypropylene (PP) copolymers containing various additives is investigated using a cosntant load scratch test and two types of indentation tests (Rockwell and Shore D). The talcfilled PP copolymer exhibits high scratch visibilityand scratch depth. Th…
Abstract Simulated annealing approach was successfully applied to solve three unknown molecular structures from X-ray laboratory powder data using a priory known structural fragments. Some possible developments of the method are discussed.
Aluminum capacitor foil with a tunnel etch structure was reacted with boiling water to deposit a layer of psuedoboehmite and was then anodized to voltages between 55 and 540 V in a neutral hot borate solution. The resulting composite oxide film consists of two layers of crystalline barrier γ′-oxide containing a high d…
Because of recent discovery that the effect of onium cation symmetricity on its properties could be manipulated to benefit the application of an electrochemical double-layer capacitor, a series of new unsymmetrical onium salts was synthesized and evaluated as electrolyte solutes in nonaqueous solvents. A relationship…
The formation of two unique μ-phenoxo-bridged nickel(II) complexes with l,5-diazacyclooctane (DACO) ligands functionalized by additional phenol donor pendants has been achieved and the complexes have been characterized by IR, elemental analyses, conductivity, thermal analysis, and UV-Vis techniques. Single-crystal X-r…
The wetting and wicking behavior of linen treated with low-temperature oxygen and argon plasma is presented. Wetting and wicking abilities of plasma treated linen are investigated using contact angles and upward and downward water wicking methods. The downward wicking method is more suitable for distinguishing the eff…
Binary phase diagrams of small particle systems, which consist of a liquid phase with pure solid phases, have been evaluated from the information on the Gibbs energy in the bulk and the surface tension of the liquid phase. As the size of the particle decreases, the melting point of the pure component decreases and the…
The pore size distributions of six mesoporous silica materials were determined by measuring the 1H NMR signal from the non-frozen fraction of confined acetonitrile as a function of temperature. The average pore size distributions determined by NMR agree fairly well with those obtained by N2 sorption measurements. Howe…
In order to obtain more information on the precipitation of nitrides, especially cubic type nitride CrN in weld heat affected zones of duplex stainless steels, the microstructures of thermally simulated weld heat affected zones (HAZs) of a commercial duplex stainless steel were characterized. The precipitates in the s…
Tumor metastases are extremely rare in striated muscles. Lately, we have found that muscle cell conditioned medium (MCM) inhibits the proliferation of various tumor cells while maintaining the growth of normal murine bone marrow cells. This dual activity was confirmed in vivo when the MCM was administered orally, i.e.…
A reaction between Gd(NO3)3·6H2O, K3[Cr(CN)6] and dmf or bpy has allowed the synthesis of two new ferrimagnetic GdIII–CrIII chains which are the first low-dimensional 4f–CrIII systems; magnetic susceptibilty data indicate antiferromagnetic coupling between GdIII and CrIII.
Epitaxial ferroelectric films undergoing a cubic-tetragonal phase transformation relax internal stresses due to the structural phase transformation and the difference in the thermal expansion coefficients of the film and the substrate by forming polydomain structures. The most commonly observed polydomain structure is…
Axial coordination to metalloporphyrins is an important tool in the supramolecular chemistry of these entities. Metalated 5,10,15,20-tetraphenylporphyrins can be axially linked to each other with the aid of amine and diamine ligands. Seven new crystalline materials consisting of such heterogeneous coordination oligome…
Tissue engineered biomaterial constructs are needed for plastic and reconstructive applications. To successfully form a space-filling tissue, the construct should induce a minimal inflammatory response, create minimal or no fibrotic capsule, and establish a vascular bed within the first few days after implantation to…
The dielectric behaviour of polluted porcelain insulators is investigated by means of experimental tests and simulation methods. The elaboration of the experimental results, using well known mathematical models of polluted insulators, leads to the identification of the arc constants. It was found out that the arc cons…
Based on reports that tuberculosis is on the increase, this investigation into the physicochemical properties of rifampicin when recrystallized from various solvent systems was undertaken. Rifampicin is an essential component of the currently recommended regimen for treating tuberculosis, although relatively little is…
The ability to determine the calcium carbonate polymorphic ratio of calcite, aragonite and vaterite in a mixture is important for a variety of applications, particularly the fields of biomineralisation and crystal engineering. Raman spectroscopy and powder X-ray diffraction were used to quantitatively determine the po…