Materials Literature
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The effective thermal conductivity of the pebble beds is one the most important design parameters for pebble bed solid breeder blanket. In the framework of IEA Implementing Agreement on Solid Breeder Subtask Group, measurement of pebble bed thermal conductivity by the hot wire method were defined as one of tasks to pr…
Abstract The Raman spectra of polycrystalline Cr 3 O 8 and Cr 2 O 5 powders were measured. The powders were prepared by thermal decomposition of CrO 3 under flowing oxygen. Their composition was verified with x‐ray diffraction. Raman spectra were excited with both 514.5 and 647.1 nm radiation. The spectral intensities…
Abstract Although most biochemistry curricula include some treatment of light absorption and spectrophotometry, discussion of fluorescence spectroscopy is generally omitted. This omission is unfortunate given the increasing use of fluorescence in many fields of biochemical research. In this paper we briefly review the…
Abstract Mixed-layer illite-smectite from Lower Palaeozoic sedimentary rocks, on both sides of the Teisseyre–Tornquist tectonic zone (TTZ) in northern Poland, was studied by X-ray diffraction and dated by K-Ar means. The percentage of smectite layers in illite-smectite (%S) indicates maximum palaeotemperatures of 125–…
Nanocrystalline W oxide films were produced by advanced reactive gas deposition. The material consisted of ∼6 nm diameter tetragonal crystallites, as found from x-ray diffraction and electron microscopy. Optoelectrochemical measurements demonstrated electrochromism upon Li+ intercalation/deintercalation, and infrared…
Severe plastic deformation may be used as a processing tool to achieve a refinement in grain size in metallic alloys to the submicrometer or nanometer range. This paper describes recent developments using the procedure of equal-channel angular pressing (ECAP) in which samples are pressed through a die containing a cha…
Three-dimensional micropatterns of well-aligned carbon nanotubes were prepared on photolithographically prepatterned substrates by pyrolysis of iron(II) phthalocyanine (FePc) under an Ar/H2 atmosphere at 800-1100 degrees C. The photopatterning was achieved by photolithographic cross-linking of a chemically amplified p…
The paper deals with the application of a non-conforming domain decomposition method to the problem of the computation of induced currents in electric engines with moving conductors. The eddy currents model is considered as a quasi-static approximation of Maxwell equations and we study its two-dimensional formulation…
A limited sampling campaign on the main island of Îles Kerguelen revealed 170 freshwater diatom taxa, belonging to 29 genera. Four different communities were distinguished in two major groups, being determined principally by habitat type. The Fragilaria vaucheriae–Fragilaria germainii assemblage occurs exclusively in…
Abstract In the presence of a catalytic amount of dioxo(tetramesitylporphyrinato)ruthenium(VI) complex, nitrous oxide (N2O) oxidized trisubstituted olefins into the corresponding epoxides in good-to-high yields with high selectivities.
A differential scanning calorimeter measures the heat flow rates between sample and device as function of time and temperature. The increasing power of both computerisation and evaluation software enables the fast and reliable kinetic evaluation of a reacting system. This is the basis for valid predictions of the reac…
Molecular orbital (MO) calculations of more than 60 porphyrinic π conjugated structures have been performed within the framework of the Pariser–Parr–Pople approximation. The results of a series of compounds are introduced and summarized in order to show how they vary depending on the systematic change in molecular str…
High-purity V-4Cr-4Ti low activation alloy products, such as plates and wires, were fabricated from the NIFS-HEAT-1 ingot with improvements of the conventional manufacturing processes. During fabrication, significant and small increase in hydrogen and oxygen level were observed, respectively. However, these contaminan…
New mesoporous and microporous catalysts based on silica, aluminophosphates, or aluminophosphates containing one or other of the heteroatoms Ti, Co, Mn, Fe and Cr, are ideally suited for study by X-ray absorption fine structure (XAFS). The information derived from X-ray absorption near-edge structure (XANES) and exten…
We investigate the relationship between the two mean-field models which have been proposed independently for characterizing the static and the light-induced thermal hystereses of spin-transition solids, respectively involving an interaction parameter J and a relaxation self-acceleration parameter α. We unify these two…
Several subsoil horizons of Andic Haploxeralfs, formed in volcanic ejecta under a xeric moisture regime in northern California, retain large amounts of exchangeable K + and show high K + saturation. The relationships between clay mineralogy, mineral charge characteristics, and exchangeable K + –Ca 2+ selectivity were…
Calmodulin (CaM)-kinase II holoenzymes composed of either alpha or beta subunits were analyzed using light scattering to determine a mechanism for self-association. Under identical reaction conditions, only alphaCaM-kinase II holoenzymes self-associated. Self-association was detected at a remarkably low enzyme concent…
Excellent mechanical properties such as high-strength, low weight, fatigue life, and impact resistance, as well as advanced manufacturing methods and flexibility of the stacking sequence make polymer matrix composites attractive candidates for use in several performance-oriented structures. However, relatively little…
We examine collective effects in an ensemble of close-packed ultrasmall CdSe quantum dots by comparison of optical properties of dense and diluted thin film composites. Studies of absorption spectra, photoluminescence excitation spectra and electroabsorption of diluted and condensed structures along with numerical sim…
Micro- vs. macro-phase separation in binary blends of poly(styrene)-poly(isoprene) and poly(isoprene)-poly(ethylene oxide) diblock copolymers, H. Frielinghaus, N. Hermsdorf, K. Almdal, K. Mortensen, L. Messé, L. Corvazier, J. P. A. Fairclough, A. J. Ryan, P. D. Olmsted, I. W. Hamley