Materials Literature
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The redox behaviour of Pd-based TWCs is studied under dynamic, cycling conditions (e.g. lambda oscillations) on a 50 millisecond scale. Pd temporal response to gas inlet mixture changes is governed by metal-promoter interface properties.
Abstract The relationship between morphology and deformation behavior of selected ethylene/1‐octene copolymers (EOCs) and their blends with high density polyethylene (HDPE) was investigated. The copolymers showed, depending on the 1‐octene content, different morphologies ranging from lamellar to worm‐like crystalline…
Several swelling mica-type clays of nominal compositions, NaxSi8−xAlxMg6O20F4·yH2O where x = 4, 3 or 2 were prepared using kaolinite, silica gel or silicic acid, magnesium fluoride and sodium chloride in the temperature range of 800 to 1100 °C after treatment for 5 to 15 h. All the synthetic clays were characterized b…
Magnetoelectric materials may be applicable in magnetic and ferroelectric devices, because they exhibit both magnetic and electrical ordering over a range of temperatures. One of the few magnetoelectic materials is BiFeO 3 . Large particles of (bulk) BiFeO 3 have a perovskite structure, a Neel temperature ( T N ) of 3…
Protein X-ray crystallography is now a relatively high-throughput technique that plays a major role in structure-based drug design programs where the method of soaking small organic ligands into protein crystals is used to confirm or identify binding modes. In this review, we discuss some experimental approaches for ‘…
By using homochiral mesoporous POST-1 (Scheme 1) as an inherently chiral sensitizing host, supramolecular enantiodifferentiating photoisomerizations of (Z)-cyclooctene (1Z) were performed for the first time to examine the sensitizing ability of the chiral nanopores, walls of which are decorated with pyridine chromopho…
Abstract In the five-component permanent magnets based on Sm2Co17 the formation of the familiar microstructural features (2:17 cell, 1: 5 cell wall, and 1: 3 lamellae) are elucidated with the help of recent and past information on the phase equilibria and crystal structures. Contrary to Zr-free alloys, in which the 1:…
Strengthening effects of quasicrystalline icosahedral phase has been studied in two alloys Mg95Zn4.2Y0.8 and Mg92.5Zn6.5Y extruded at 250 and 400 8C. The quasicrystal particles are facetted and show definite orientation relationships with the matrix. Due to its high symmetry and quasiperiodicity, the icosahedral phase…
The influence of excitation density on luminescence decay in Y3Al5O12:Ce and BaF2 crystals at room temperature was investigated for the first time using pulsed free electron laser radiation in vacuum ultraviolet. Increased excitation density led to the remarkable shortening of luminescence decays with non-exponential…
Abstract A synthetic route to a series of homochiral (and achiral) nitronyl nitroxides derived from rac ‐(and meso )‐3,4‐dimethyl‐3,4‐dinitrohexane is described. The two forms of this precursor, meso and rac , were identified unambiguously and reduced to the corresponding meso ‐ and rac ‐diamines. The rac ‐diamine was…
For diatom biologists one of the most interesting research areas over the next years will be in linking mathematical models for pattern formation with information derived from molecular genetic, biochemical, and physiological studies. A major goal of this research is to exploit diatom proficiency in biogenic silica fo…
We have reported that the Pd-perovskite catalyst regenerates itself through the solid solution and segregation of Pd in and out of the perovskite crystal during the inherent fluctuation of engine exhaust gases. We named this innovative ceramic the “intelligent catalyst.” In this study, the structural stability and the…
Polished sections of tuyere coke were studied by optical and scanning electron microscopy and wavelength-dispersive analysis (WDS) to reveal structural and chemical changes occurring with mineral phases (K- and Na-, ±Ca-bearing aluminosilicates). The aluminosilicates in the tuyere coke form new compounds, which occur…
The solubility of actinides and actinide surrogates in a nuclear borosilicate glass was studied with cerium, hafnium, neodymium, thorium and plutonium. Cerium is a possible surrogate for tetravalent and trivalent actinides such as plutonium, hafnium for tetravalent actinide such as thorium, and neodymium for trivalent…
We examined the oxidation state and local structure of hydrated ambigel V 2 O 5 ∙ 0.5 H 2 O composite cathodes cycled in a nonaqueous electrolyte lithium cell. Changes in the oxidation state and local structure were monitored by X-ray absorption spectroscopy under in situ conditions. The cathodes had initial discharge…
Fabric thermal properties have been of great interest and importance for textile researchers, since they are among the major characteristics that determine
This article reviews novel electrical and optical properties found for epitaxial thin films of wide-gap semiconductors, LnCuOCh (Ln=lanthanide, Ch=chalcogen). This material series has a two-dimensional crystal structure composed of alternately stacked (Ln2O2)2+ and (Cu2Ch2)2- layers. Distinctive properties such as hig…
Anode-supported cells were fabricated with optimized cathodes showing high power density of at under a cell voltage of and an active area of . A microstructure study was performed on such cell using a field-emission gun scanning electron microscope, which revealed that the (LSM) composite cathodes consist of a network…
Abstract A small library of defined peptide dendrimers based on polyproline sequences was designed to demonstrate the feasibility of generating a new type of polymeric agent for therapeutic use. Structural modifications to dendrimer surfaces further enriched the diversity of the library. Data show that the prolinerich…
The thermal conductivity of platinum alloys with a f.c.c. single phase was comprehensively surveyed by the laser flash method. Thermal conductivity is predominantly determined by alloy composition and temperature and is little affected by work hardening. An addition of solute clearly decreases the thermal conductivity…