Materials Literature
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35 Cl NMR spectra were measured using the highest-temperature solid phase of n-C x H (2x+1) NH 3 Cl and n-C x H (2x+1) ND 3 Cl (x=5−10). The observed quadrupole coupling constants (e 2 Qqh −1 ) decreased upon heating in this phase, and significant frequency differences of ca. 20 − 30 kHz were detected between the -NH…
Plastic strain localization in single crystals of pure metals and alloys is studied on the yield plateau and at the easy glide stage with a zero or small strain hardening coefficient. The difference between localization patterns in the two cases is explained, and strain localization mechanisms are suggested. At these…
A simplified three-dimensional structural model for a series of nonwoven fabrics is presented. The corresponding directional permeabilities of the fabrics are calculated based on the measured two-dimensional fiber orientation distribution. The influences of fiber diameter, fabric porosity, and fiber orientation distri…
The present work studies the effect of niobium addition on the mechanical properties and microstructure of an as-cast 4·3%Ni alloyed ductile iron. The experimental iron was made from high purity raw materials in a laboratory induction furnace. Eight castings were produced with niobium content in the range 0–0·8%. Sili…
Samples of double rare-earth ferrite La1 xNdxFeO3 are synthesized by a high-temperature double sintering ceramic technique. X-ray diraction shows that all compounds have an orthorhombic structure. The values of lattice parameter and the volume of the unit cell, changes with increasing Nd 3+ content. The Goldschmidt to…
ABSTRACT Films for potential food use were prepared from aqueous solutions of β‐glucan extracted from hulled barley, hull‐less barley, and oats. The extracts (75.2–79.3% β‐glucan) also contained proteins, fat, and ash. Glycerol was used as a plasticizer. The films were translucent, smooth, and homogeneous in structure…
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‐…