Materials Literature
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We evaluated the valence band structures of 10-nm-thick ferromagnetic Fe4N epitaxial films on SrTiO3(001) substrates at room temperature using spin-resolved photoelectron spectroscopy. Negative spin polarization is confirmed at the Fermi level. The experimentally obtained photoelectron spectra are well explained by fi…
Natural Brazilian clay-based catalysts were prepared, characterised, and their catalytic activity was assessed in esterification reactions. The natural clays were acid activated as received, without any previous treatment. Both natural and acid-activated clays were characterised by XRD, NH3-TPD, thermodesorption of n-…
The structural position of Ti 4+ ions in TiO 2 -Na 2 O-SiO 2 glasses of x TiO 2 · (100 − x ) [2Na 2 O · 3SiO 2 ] (0 ≤ x ≤ 30) composition has been studied with Raman spectroscopy. The analysis of spectra recorded has demonstrated that Ti 4+ ions in the studied glasses can be in two structural groups—TiO 5 and TiO 6 .…
Periodontitis is a complex disease and bacterial infection is one of the most common factors involved in this disease. Current strategies for the local delivery of antibiotics do not allow a complete clearance of bacteria filling dentinal tubules and this limits their therapeutic efficacy. Therefore, there is a strong…
BACKGROUND: Gefitinib is a promising agent for the treatment of non-small cell lung cancer. The purpose of this study was to develop a novel liposomal formulation for gefitinib (L-GEF) to improve its therapeutic index. MATERIALS AND METHODS: Several L-GEF formulations were prepared and characterized for their physical…
The corrosion behavior of carbon steel in 0.5 M HCl solution in the absence and presence of new five Schiff bases of indole derivatives was investigated using electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM) and potentiodynamic polarization techniques. All the experimental resul…
Effects of nano-copper(II) oxide (nano-CuO) and nanomagnesium oxide (nano-MgO) particles on activated sludge endogenous respiration (aerobic digestion), biochemical oxygen demand (BOD) biodegradation, and nitrification were investigated through respiration rate measurement. For comparison, the effects of Cu(II) and Mg…
The frequency dispersion of the electrical conductivity of silver/polyacrylonitrile nanocomposite films is studied at various temperatures and AgNO3 contents in an initial mixture. The frequency dependences of the nanocomposites in the range 103–106 Hz are found to be well described by power law f 0.8. A charge transf…
Liquid crystals (LCs) are synthetic and biological viscoelastic anisotropic soft matter materials that have a combination of fluidity of liquids and anisotropy of solids and find use in optical devices, sensor/actuators, lubrication and super-fibres. Mesogens are frequently mixed with colloidal and nanoparticles (NPs)…
PURPOSE: A lipid-based, nanomicelle-loaded docetaxel (M-DOC) was designed and characterized. Optical imaging was employed to evaluate the pharmacokinetics and antitumor efficacy of docetaxel in vivo. MATERIALS AND METHODS: The M-DOC was prepared using the emulsion-diffusion method. Transmission electron microscopy and…
The biosynthesis of gold nanoparticles would benefit from the development of clean, nontoxic, and environmentally acceptable procedures concerning microorganisms from bacteria to fungi. Streptomyces are saprophyte bacteria that have the enormous ability to produce secondary metabolites such as vitamin B, antibiotics,…
Extreme ultraviolet (EUV) radiation-induced carbon contamination and oxidation of Au surfaces were investigated using x-ray photoelectron spectroscopy (XPS). The Au sample was irradiated by EUV radiation at 13.5 nm for 9 h, while a series of XPS spectra were recorded for monitoring chemical modification during EUV exp…
Corrosion noted on a number of nineteenth and twentieth century indoor bronze sculptures in the collection of the National Gallery of Canada was the cause for a major condition survey of its Canadian, American, and European bronzes. The results led to a comprehensive study, which included material analysis. This artic…
Conjugated bi-layer C 8 metamaterials are proposed. Chirality and refractive index can be controlled effectively by the structure geometry. Extreme chirality results in a high negative refractive index for both right- and left-circular polarized excitations. The conjugated bi-layer C 8 structures are fabricated and te…
Within the framework of this study, the physical modification of high-density polyethylene waste foil was performed using finely ground hazelnut flour to produce a composite whose physical, mechanical and flammable properties make it possible to use inside and outside of buildings. Three mixtures were produced with fi…
Abstract A method for nuclear magnetic resonance (NMR) characterization of whole cell wall components, including lignin, cellulose and hemicelluloses, was recently developed in our laboratory. The method described for fir ( Abies sachalinensis ) as a softwood consists of ball-milling of cell wall, dissolution in an io…
This paper studies the influence of surface effects (including the residual surface stress and surface elasticity) on the nonlinear free vibrations of nanoscale plates. The motion equations are derived by using the Hamilton’s principle and solved numerically. It is found that the influence of surface effects on the no…
Ripples in graphene monolayers deposited on SiO(2)/Si wafer substrates were recently shown to give rise to friction anisotropy. High friction appears when the AFM tip slides in a direction perpendicular to the ripple crests and low friction when parallel. The direction of the ripple crest is, however, hard to determin…
Tissue regeneration is aimed at producing biological or synthetic scaffolds to be implanted in the body for regenerate functional tissues. Several techniques and materials have been used to obtain biodegradable synthetic scaffolds, on which adhesion, growth, migration and differentiation of human cells has been attemp…
Charge carrier concentration (n0) and effective mobility (μeff) are reported in two polymer films (<10 μm) and in a very high temperature range (from 200 to 400 °C). This was possible thanks to an electrode polarization modeling of broadband dielectric spectroscopy data. It is shown that the glass transition te…