Materials Literature
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We report the experimental observation of the novel phenomenon of the resistivity decrease in porous PbTe layers during the pore formation process. Investigations were performed on the n-PbTe films with 2.3-μm thickness, which were near the point of the conductivity-type inversion at room temperature. Anodic electroch…
Identification of proteins involved in mollusk biomineralization by proteomics approach is gaining importance. These proteins are often characterized by low-complexity regions (LCRs) made of repeating motifs that are constituted by few amino acids (e.g. IGG, DD, KK, and GGG). In this work, we have analyzed the fragmen…
The effect of minor additions of Gd and Sm on the glass-forming ability (GFA) of Cu-Zr-Al alloys is investigated here. The rationale for these additions is the fact that the atomic size distribution can increase GFA by changing the topology of the alloy as a function of cluster stability, which is tied to the electron…
The Co3O4 nanorod bundles are synthesized by a hydrothermal method. The samples are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron diffraction (ED), X-ray powder diffractometer (XRD), and nitrogen adsorption. It is important that the as-obtained Co3O4 nanorod bund…
We present an anomalous electro-optic effect in polar liquid films: liquids, usually considered to be isotropic, possess the linear electro-optic effect that occurs only in materials lacking inversion symmetry. Due to the observed large effect in the low-frequency range and slow response speed, this strange effect was…
A novel multilayer electromagnetic bandgap (EBG) structure with two spiral-shaped planes embedded between the power plane and the traditional high-impedance surface (HIS) is presented. The equivalent capacitance between the power plane and the HIS and the self-inductance of the patch can be increased significantly, wh…
Abstract Nanoparticles of Cd1-x Zn x S (x = 0–0.8) were prepared in neat 1-ethyl-3-methylimidazolium ethyl sulfate, a halide-free and low-cost room-temperature ionic liquid (RTIL) via a simple heating method. The nanoparticles were investigated by means of powder X-ray diffraction, scanning electron microscopy, and UV…
Abstract The energy absorption characteristics of foam materials can be represented by specific energy absorption W, energy absorption efficiency E and ideal energy absorption efficiency I. The influences of strain rate, cell size, relative density and the content of SiC on energy absorption characteristics of magnesi…
A morphological study was conducted on ternary systems containing epoxy, poly(methyl methacrylate) grafted natural rubber and organic chemically modified montmorillonite (Cloisite 30B), using TEM. The following four materials were prepared at room temperature: cured unmodified epoxy, cured toughened epoxy, cured unmod…
This study presents a way of preventing a highly hydrophobic bioactive drug encapsulated in polycaprolactone (PCL) nanoparticles from forming drug crystals aqueous systems. Thymol trimethoxycinnamate was selected as a hydrophobic bioactive model drug. Four PCL-drug nanoparticles were prepared: their internal structure…
The X-ray optics of singly and doubly curved crystals are studied using a vector procedure and rotation matrices and general relations for the angular deviation from the Bragg angle over the crystal surface with a source aligned or misaligned on the Rowland circle. Hence, the effective scattering area, collection soli…
RESUMO:Este estudo teve o propósito de investigar as propriedades microdureza superficial e resistência a compressão de 5 marcas comerciais de compósitos indiretos. Confeccionaram-se 25 espécimes de 5 marcas comerciais de compósitos (n=5) para cada tipo de ensaio: Signum (Heraeus Kulzer), Solidex (Shofu Inc.), Resilab…
Excitation wavelengths of 282.4, 273.9 (A band), 252.7, 239.5 and 228.7 nm (B band) resonance Raman spectra were acquired for di‐2‐pyridylketone, and density functional calculations were carried out to help in the elucidation of the photo relaxation dynamics of A‐band and B‐band electronic transitions. The resonance R…
Abstract The intrinsic viscosity of the filler is a key parameter to determine the increase in viscosity of bitumen as a function of filler volume fraction. In this study, the intrinsic viscosity of bitumen containing different organo montmorillonite (Mt) nanoclay was studied by using Simha composite model. The compar…
In this work, lead phthalocyanine (PbPc) and ZnO/InN inorganic semiconductor films prepared by oblique-angle deposition (OAD) were layered to form heterojunction organic/inorganic hybrid photovoltaic solar cells. Among the available organic materials, phthalocyanines, particularly the non-planar ones such as PbPc, are…
Abstract The effect of crystallographic texture on grain growth was studied in two samples from an interstitial-free steel sheet with two different primary recrystallization textures, one with a pronounced {111} fiber texture and the other with an almost random texture. Upon grain growth annealing, the sample with the…
PURPOSE OF REVIEW: Mitral regurgitation is a growing public concern affecting a large number of individuals in the United States. Although echocardiography is the primary imaging modality for assessment of mitral regurgitation, it may be inadequate or suboptimal for a variety of reasons. In these instances, cardiac ma…
A silane–cerium treatment was applied on an aluminum adherend to simultaneously improve the bonding performance and corrosion resistance of the adhesively bonded aluminum joint in cryogenic applications, such as with liquefied natural gas containment tanks. The lap shear strengths and corrosion performances of the adh…
Abstract Ballistic impact characteristics on the flat-nose projectile penetrating the concrete and soil compound target are studied. The deformation process and failure zone in the target are described by numerical simulation with finite element software. The results show that penetration depth, residual velocity and…
Digital X-ray topography using an X-ray CCD camera and conventional X-ray topography using X-ray film were used to investigate tetragonal hen egg-white lysozyme (HEWL) crystals. Previously, clear dislocation images of protein crystals were mainly obtained by film methods. Earlier studies of HEWL crystals using an X-ra…