Materials Literature
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The structural and magnetic properties of MnSb layers grown on two differently oriented GaAs substrates are reported. The MnSb compounds grow nonhomogenously both on GaAs(111)B and on GaAs(100) substrates. In x-ray diffraction studies the formation of two epitaxial domains is observed depending on the crystallographic…
By incorporating saturation-induced gain modulation of an erbium-doped fiber amplifier (EDFA), we have demonstrated a high-speed photo-assisted electrical gating with considerably enhanced switching characteristics in a two-terminal device fabricated by using vanadium dioxide thin film. The gating operation was perfor…
Hyperthermia by heating in-stent is a potentially new method to treat esophageal cancer. This study assessed the safety of heating the rabbit esophagus with a nitinol stent in an alternating magnetic field (AMF) and investigated whether this method offers a therapeutic option for esophageal cancer. Nitinol stents were…
Blends of Ethylene Vinyl Acetate/Waste Tire Dust (EVA/WTD) were prepared by using a Haake Rheomix at 100/0, 90/10, 80/20, 70/30, and 60/40 blend ratios. The effect of mixing temperature, blend ratio and blending time on the tensile properties of EVA/WTD blends were investigated. The mixing time was varied from 5 to 30…
Creep tests were conducted on a nanocrystalline Cu at room temperature. The results at very low strain rates (<4×10−8 s−1) are consistent with Coble creep. An overall view of stress-strain rate behavior of this nanocrystalline Cu indicates that as the strain rate decreases, the deformation mechanism transition…
Grain-oriented barium titanate (BaTiO3) ceramics were prepared by templated grain growth (TGG) method using [110]-oriented BaTiO3 platelike particles as a template and hydrothermal BaTiO3 sphere particles with different particle sizes as a matrix. The degree of orientation along the [110] direction, F110, was measured…
Dielectric, X-ray, pyroelectric and piezoelectric studies of the (1-x)PbFe1/2Nb1/2O3–(x)PbTiO3 ceramics from the 0 ≤ x ≤ 0.2 range fabricated by solid state synthesis and usual sintering have been carried out. In PbFe1/2Nb1/2O3 and compositions with low Ti content anomalies of dielectric, pyroelectric and piezoelectri…
Abstract The catalytic combustion of carbon black (CB) used as a model of diesel soot in tight contact with a commercial ceria (CeO 2 ) was investigated. Oxygen mole fractions of 10, 5, and 1 % in the gas phase were tested in order to gain a better understanding of the redox properties of ceria and the mechanism of th…
A simple strategy to improve the particle dispersion and structural ordering of magnetic nanoparticle/block copolymer composites is demonstrated. This method consists of manipulating both the block copolymer structure in a solvent and the relative interactions of particle/solvent and polymer/solvent to facilitate the…
Abstract The glass fiber reinforced polyester composite materials were prepared with varying contents of boric acid, zinc borate, and magnesium hydroxide as flame retardants to improve the flame retardancy of the composites. Experimental results showed that boric acid exhibited a good flame retardant effect on the pol…
This work investigates the processibility and miscibility of linear low density polyethylene (LLDPE) and poly(vinyl alcohol) (PVA) blends. The linear low density polyethylene/poly(vinyl alcohol) was blended to give the following blend ratio (wt%): 100/0, 90/10, 80/20, 60/40, 50/50, 40/60. The blends were melt mixed us…
There has been a significant amount of research in analyzing the thermal, electrical, and other physical properties of carbon nanotubes (CNTs). However, the energy transport mechanism at the contact of two CNTs is still not well understood. This study investigates the interfacial thermal interaction between two CNTs u…
Studies on Bolivian diatoms are scarce and they do not represent the great geographic variability of the country.One of the regions with the highest biological diversity in Bolivia is the Yungas (cloud forest), a 90.500 km 2 strip located between the Andean Puna and the Amazonian lowlands.The Carrasco National Park is…
Diatom assemblages preserved in lake sediment records can provide proxy data of past environmental changes in biological conditions. In order to investigate past changes in the environment of north-central Michigan, diatom assemblages were studied in sediment cores retrieved from 24 lakes. Diatoms were analyzed from t…
Linked porphyrins: A porphyrin undergoes unique homocoupling in the reaction of meso-bromoporphyrins under palladium catalysis (see scheme). Formal remote CH bond cleavage leads directly to the construction of meso–β-linked diporphyrins in good yields with perfect regioselectivity.
Amorphization of crystalline olivine to glass with a pyroxene composition is well known from high-energy irradiation experiments. This report is on the first natural occurrence of this process preserved in a chondritic aggregate interplanetary dust particle. The Fe-rich olivine grain textures and compositions and the…
The Ebro River discharge is the main factor controlling hydrological dynamics in the Ebro microtidal salt wedge estuary.The aim of this study was to describe the species composition of the periphytic diatom communities, and to elucidate the main environmental factors affecting them.Samples of periphytic diatoms were c…
Molecular imaging is aimed at the noninvasive visualization of the expression and function of bioactive molecules that often represent specific molecular signatures in disease processes. Any molecular imaging procedure requires an imaging probe that is specific to a given molecular event, which puts an important empha…
In this article, we examine the initial polarization of PbTiO3 thin films grown epitaxially on SrRuO3 electrodes. It is found that the as-grown predominant polarization is directed toward the SrRuO3 bottom electrode in films thinner than 20 nm and directed toward the top surface in thicker films. The data is interpret…
Stress concentration will generate a weak field leakage on the surface of ferromagnetic materials in the geomagnetic field because of the magneto-mechanical effect. Therefore, stress concentration can be evaluated by detecting the magnetic field on the surface of metal parts. This method has become an interesting focu…