Materials Literature
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Photophysical properties of meso-tetrakis(4-N-methylpyridiniumyl)porphyrin ( TMpyP 4) and its metallocomplexes M (II) TMpy P4 ( M = Zn , Cu , Ni , Co ) bound to natural DNA and synthetic poly-, oligo- and mononucleotides are considered with a primary emphasis placed upon intermolecular interaction of the photoexcited…
The reasons for the existence of various scenarios for structural transformations in disordered condensed media, such as liquids and amorphous substances, where both smeared transformations and sharp first-order transitions may occur, were analyzed. The ratio between the spatial scale of structural correlations and th…
High density closed-cell HDPE foams (450–950 kg/m3) were prepared by compression molding, and torsion rectangular tests were performed to measure their shear modulus in order to study: (1) the relationship between the modulus as a function of the density, and (2) to determine the effect of thin skins. Based on the ass…
Abstract The use of grafted poly(propylene) (PP) and a random copolymer of ethylene and propylene (EPR) with an itaconic acid derivative, monomethyl itaconate (MMI), as compatibilizer for PP/EPR blends was analyzed. The grafting reaction was performed at 190 °C in a Brabender Plasticorder. 2,5‐Dimethyl‐2,5‐bis( tert ‐…
This addendum to “Catalogue of the diatom genera” (Fourtanier & Kociolek, Diatom Research, 14, 1–190, 1999) includes nomenclatural information for 93 generic names, most of which were published in the last 6 years. The data for each name include authorship, place of publication with pages on which the protologue appea…
Silicon compounds containing R3SiO1/2 (M-unit), R2SiO (D-unit), RSiO3/2 (T-unit), and SiO2 (Q-unit) in various combinations are commonly used as flame-retardant auxiliaries for polycarbonate (PC) plastics, and the use of branched DT-type silicones as the main flame retardant has also gained interest. We have found, ba…
Expression by Saccharomyces cerevisiae of a polyhydroxyalkanoate (PHA) synthase modified at the carboxy end by the addition of a peroxisome targeting signal derived from the last 34 amino acids of the Brassica napus isocitrate lyase (ICL) and containing the terminal tripeptide Ser-Arg-Met resulted in the synthesis of…
We propose a theoretically justified experimental magnetometric technique for determining the size of stochastic domains spontaneously formed in the spin system of nanostructured ferromagnets and for evaluating the effective anisotropy in these magnetically correlated regions. The method is based on monitoring the Δ M…
Abstract Previous efforts have demonstrated that high‐pressure CO 2 can markedly influence the phase behavior of amorphous polymer blends. In this work, we examine the effect of high‐pressure CO 2 on the miscibility of blends composed of glassy poly(methyl methacrylate) (PMMA) and semicrystalline poly(vinylidene fluor…
In this communication, we describe an inexpensive and feasible method for the preparation of hexagonal boron nitride (h–BN) nanorods in the absence of metal catalyst. Tertiary calcium phosphate (Ca 3 (PO 4 ) 2 ) and ammonium biborate hydrate (NH 4 HB 4 O 7 ·3H 2 O) were selected as starting materials where calcium pho…
Comparative analysis of 16S rDNA sequences revealed a close phylogenetic relationship (99.6 % similarity) between Subtercola pratensis Behrendt et al. 2002 and Agreia bicolorata Evtushenko et al. 2001. The two species were found to share genus-specific chemotaxonomic characteristics such as the occurrence of D-ornithi…
The static and resonance properties of copper metaborate CuB 2 O 4 were experimentally studied in a magnetic field applied in the crystal tetragonal plane. The field-induced second-order phase transition to a weakly ferromagnetic state was observed in the temperature range 10–20 K. The low-field state is characterized…
A promising material for hypervelocity impact shields in spacecraft and satellites has been found in lightweight microcellular SiOC foams. The foam stops the projectile and the debris from the impacted bumper facesheet within a few millimeters (see Figure for a cross‐section of the crater) at speeds up to 5.1 km s –1…
Some archaeological silver objects are found to be brittle. The brittleness is a consequence of long‐term corrosion and microstructural changes. The types and mechanisms of embrittlement are defined and explained. The severity of embrittlement is increased by a larger grain size and by synergistic action of corrosion‐…
The compounds 1,3,5-triphenyl-4,5-dihydro pyrazole, 1,3-diphenyl-5(p-methoxy phenyl)-4,5-dihydro pyrazole and 1,3-diphenyl-5(p-methyl phenyl)-4,5-dihydro pyrazole were prepared. The FTIR and laser Raman spectra of the compounds are recorded and all the normal modes of vibrations are assigned.
Phase stability studies were performed within the quasi‐ternary system LaGaO 3 ‐SrGaO 2.5 ‐“LaMgO 2.5 ”. Emphasis was cast on the temperature dependence of the homogeneity region of La 1− x Sr x Ga 1− y Mg y O 3−δ perovskite solid solutions. Isothermal sections were determined at 1100°, 1250°, 1400°, and 1500°C in a s…
Abstract A novel low‐temperature process for the electrochemical hydrogenation of canola oil is described. An emulsion of oil and water containing formic acid and a nickel hydrogenation catalyst, placed in the cathode compartment of an electrolysis cell and subjected to an electrical current, underwent hydrogenation a…
We theoretically investigated the local structure of the aperiodic states of zircon (ZrSiO 4 ) using ab initio quantum mechanical calculations. The low and high density liquid and solid glassy phases were obtained by constant volume Car-Parrinello molecular dynamics simulations, using the molar volume of metamict and…
Abstract The neutral Ln III 1:1 nitrato complexes with the chiral ligand 2,6‐bis(1‐ S ‐neopentylbenzimidazol‐2‐yl)pyridine (L 11 ) have been synthesised and their stability constants measured in acetonitrile (log K 1 = 4.0−6.4). The crystal and molecular structure of [Eu(NO 3 ) 3 (L 11 )(MeCN)] shows the typical merid…
We have measured the optical properties of wire-grid polarizers (WGPs). The implications of these results to the application of WGPs in projectors that use reflective light valves are discussed. In particular, the brightness and the contrast ratio of the projection system are investigated as functions of the angle of…