Materials Literature
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Dielectric properties of SiC/Ni nanocomposites prepared by a simple and facile electroless plating approach at X band are investigated. Compared to the original SiC nanoparticles (SiC P ), the real part of the permittivity, ∊′, and the dielectric loss tangent tan δ e of SiC/Ni nanocomposites are clearly enhanced by ab…
VUV spectroscopic properties of rare-earth (RE3+ = Eu, Tb, Tm)-doped AZr2(PO4)3 (A+ = Li, Na, K) type phosphate, Zhang, Zhi-Jun, Chen, Hao-Hong, Yang, Xin-Xin, Zhao, Jing-Tai, Zhang, Guo-Bin, Shi, Chao-Shu
An apparatus to obtain low-temperature thermodynamic information under high pressures for a tiny single crystal of molecular compounds was developed based on the ac technique. To detect small temperature oscillation of a sample inside the cramp-type pressure cell, we have used a small ruthenium oxide chip sensor as a…
The effect of cerium (Ce) addition into Cu (5, 10 or 15 wt%)/gamma-Al2O3 catalysts on the catalyst properties and catalytic activity was investigated for the complete oxidation of volatile organic compounds (VOCs). X-ray diffraction (XRD), the Brunauer Emmett Teller method (BET), temperature programmed reduction (TPR)…
The molecular structure of the trans isomer of metal-free phthalocyanine (H2Pc) is determined using the gas electron diffraction (GED) method and high-level quantum chemical calculations. B3LYP calculations employing the basis sets 6-31G**, 6-311++G**, and cc-pVTZ give two tautomeric isomers for the inner H atoms, a t…
The reduction of Au(III) with hydrazine monohydrate in micellar Triton N-42 solutions was shown to be an autocatalytic reaction. Its rate constants were calculated. The growth of a gold nucleus proceeded as a result of surface reduction until the polar micelle nanocavity was completely filled. Calculations according t…
The three-dimensional shapes of plagioclase crystals in an experimentally cooled basaltic liquid have been reconstructed, with the aim of (1) better understanding crystal growth processes and the diversity of crystal shapes produced during cooling, and (2) to assess the validity of crystal-size distributions (CSDs) de…
In this study, ultrasonic cavitation energy states were analyzed in a pilot-scale sonoreactor, using two- and three-dimensional mapping methods. The highest and most stable cavitation energy state, through the whole length, was obtained with an ultrasound application of 72 kHz. However, very poor energy distributions…
Coral sands and affiliated environments off the Réunion Island (Mascarene archipelago, Western Indian Ocean) are inhabited by diversified diatom communities. The Monoraphidineae taxa are particularly numerous. A preliminary survey (June 2005) of coral sands from the fringing reefs “Ferme Corail”, “St Leu” and “l'Hermi…
The substrate induced anisotropic strain was found to have a significant effect on the charge ordering (CO) transition and surface morphology in Bi0.4Ca0.6MnO3 films deposited on (110)- and (111)-oriented SrTiO3 substrates. Effects of film thickness t on the CO transition were further studied. The CO transition appear…
This paper analyses the relationships between production, structure and properties of a collection of crosslinked closed cell polyethylene foams. Foams with similar densities produced from a similar base polymer and manufactured using three different technologies (high pressure nitrogen solution process, compression m…
Partial discharges are a transient phenomena whose measurement is remarkably important for electrical equipment diagnosis and maintenance. These discharges appear in the measurement circuit as very narrow current pulses of some nanoseconds. Therefore, discharge pulse detection is a particularly difficult problem, espe…
Abstract In-pile deformation of nuclear structural components remains a major preoccupation for fuel vendors and utilities, especially when introducing new alloys or extending burn-ups. The usual invoked causes of such deformations are free growth, hydriding (hydrides induce a volume expansion which translates into de…
Abstract The previous CEA corrosion code COCHISE provided satisfactory simulations of in-reactor corrosion of the fuel cladding when used in its validity range. In contrast, it could lead to hazardous predictions if applied out of this range due to the strongly linked parameters mainly based on the analysis of French…
Light and electron microscopy study of Cyclotella ocellata Pantocsek (Bacillariophyta) species from Lake Khubsugul (Mongolia) revealed an appreciable morphological variability of qualitative (valve relief, presence of several morphotypes, structure and arrangement of rimoportulae, central and marginal fultoportulae, a…
Copper-carbon clusters, formed by dual Nd/YAG laser vaporization, have been trapped in solid Ar at 12 K and investigated by infrared spectroscopy. Density functional calculations of a number of possible molecular structures for Cu/carbon clusters have been performed, and their associated vibrational harmonic mode freq…
Nickel nanoparticles (Ni NPs) have been applied in a wide range of areas because of their unique structure and properties such as catalysts, high-density magnetic recording media and others. However, little effort has been paid to their biological application and the concrete effect of Ni NPs on biological systems is…
The paper gives a leisurely introduction to mathematical diffraction theory with a focus on pure point diffraction. In particular, various characterizations of pure point diffraction and common models arising from cut and project schemes are discussed. It finishes with a list of open problems.
The densest packing of tetrahedra is still an unsolved problem. Numerical simulations of random close packing of tetrahedra are carried out with a sphere assembly model and improved relaxation algorithm. The packing density and average contact number obtained for random close packing of regular tetrahedra is 0.6817 an…
A new method for measuring the coefficient of friction between nonwoven materials and the curved surface of the volar forearm has been developed and validated. The method was used to measure the coefficient of static friction for three different nonwoven materials on the normal (dry) and over-hydrated volar forearms o…