Materials Literature
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We investigate the size-dependent lattice thermal conductivity of silicon (Si) square cross-sectional and cylindrical nanowires. The calculation includes the modifications of the phonon density of states and group velocities due to phonon confinement. The decrease in phonon density of states and group velocities resul…
The works on synthesis and main properties of fibrous ion exchangers are reviewed in the paper. The main attention is paid to the FIBAN materials found practical applications in water treatment and air purification processes. The following methods for preparation of ion exchange fibers have been considered: mechanical…
Eu 3+ -doped ZnO nanoneedles were fabricated by thermal evaporation. In order to include Eu in ZnO nanostructures, europium nitrate was used to produce starting droplets from which ZnO nanoneedles were grown. Photoluminescence spectra included a sharp blue peak corresponding to the ZnO band gap and a broad red band du…
In the silkmoth Bombyx mori, the germ cells first appear from the posterior ventral side of the egg (from within the mesodermal primordium) after blastoderm formation. This is in contrast to Drosophila, where germ cells appear at the posterior pole before cellular blastoderm formation. To date, germ plasm has not been…
Barium titanate (BaTiO 3 ) crystallites with various particle sizes from 10 to 300 nm were prepared by the two-step thermal decomposition method of barium titanyl oxalate nanoparticles with a particle size of 30 nm under vacuum to prepare defect-free BaTiO 3 nanoparticles with a thin surface cubic layer. Various chara…
Biopolymers such as chitosan, pectin, alginate, ı-carrageenan and gelatin, can be assembled to layered solids by direct intercalation via ion exchange in the case of smectites or a ‘co-organised assembly’ method in the case of layered double hydroxides (LDHs). Layered perovskites can be delaminated and combined with t…
During the past decades there has been minimal improvement in prevention and treatment of hypertrophic scarring. Reasons include the lack of a validated animal model, imprecise techniques to dissect scar into the histologic components, and limited methodology for measurement of gene expression. These problems have bee…
Abstract A new dispersant for stabilization of single wall carbon nanotubes (SWNTs) in water that simultaneously utilizes three different dispersion or stabilization mechanisms: surfactant adsorption, polymeric wrapping, and Coulomb repulsive interaction, has been demonstrated. The new dispersant, a charged rod‐like n…
Non doped potassium niobate (KNbO 3 ) crystal powders were synthesized by ultrasonic-assisted hydrothermal method for use in lead-free piezoelectric ceramics. By using the ultrasonic assist technique, the yield constant of the KNbO 3 crystal powders became 96% with 3 h of reaction time. It was 4 times faster than that…
Hafnium oxide films doped with CeCl 3 and/or MnCl 2 , and deposited at 300 °C by an ultrasonic spray pyrolysis process, were characterized using x-ray diffraction (XRD), energy-dispersive spectroscopy and photoluminescence. The XRD results revealed that the films are predominantly amorphous. The weak green–red emissio…
Abstract The Lembo clay deposit occurs on orthogneiss, but it also comprises clays with litho-relicts of volcanic rocks. In this study, ten samples from two sites were investigated. The mineralogical compositions consisted of kaolinite + halloysite + illite + quartz + hematite + anatase ± rutile ± orthoclase ± sanidin…
Colloidal silver nanoparticles were prepared by γ-irradiating Ag+ in aqueous solution in the presence of 2% polyvinyl pyrrolidone (PVP) as stabilising agent and ethyl alcohol as free radical (OH•) scavenger. The saturated conversion dose of Ag+ into Ag was determined by UV–Vis spectroscopy and the silver nanoparticles…
Despite advances in stent design, expansion techniques and anti-thrombotic agents to improve pharmacological control of subacute thrombosis (SAT) and to reduce to 2 the occlusive thrombosis rates, a significant risk of mortality associated with thrombotic vascular occlusion due to the adhesion of blood constituents re…
The effect of oxygen in solution and surface oxide on the properties of titanium foams under compression is discussed in this report. The authors present a simple method to discriminate the amount of oxygen coming from the oxide and from the solid solution. Oxygen in solution has an impact on the hardness, yield stren…
Combinatorial libraries of peptide dendrimers bearing two and four copies of C-fucosyl residues were screened for binding to fucose specific lectins leading to potent ligands for Ulex europaeus lectin UEA-I (IC(50) = 11 microM). The dendrimers also show high affinity for the lectin PA-IIL (IC(50) = 0.14 microM) from t…
Samples of microporous amorphous carbon materials with calculated BET specific surface areas of up to 3500 m 2 /g, pore volumes of up to 3.0 cm 3 /g, and micropore volumes of up to 1.9 cm 3 /g were prepared using the chemical activation of rice hulls carbonized in a fluidized-bed reactor with a copper-chromium catalys…
We report on the utilization of localized surface plasmon resonance (LSPR) of Ag nanoparticles to tailor the optical properties of VO2 thin film. Interaction of nano-Ag with incident light yields a salient absorption band in the visible-near IR region and modifies the spectrum of VO2 locally. The wavelength of modific…
In this paper, the results of two experiments are reported. First, the performances of various types of nonthermal plasma reactors for NOxreduction were compared. It was shown that the surface-discharge reactors have as high NOxreduction capabilities as pulse-powered wire-cylinder reactors. Second, NOxtreatment using…
Denoising is one of the major part in on-line partial discharge(PD) measurement system. In the recent years wavelet transform has been widely used in PD denoising area and its effectiveness discussed in many papers. In this paper, different wavelet based transforms such as DWT, WPT, SWT and DT-CWT and their performanc…
We report an experimental study of 2D microfoam coarsening confined in a micrometer scale geometry, the typical bubbles diameter being of the order of 50–100 μm. These experiments raise both fundamental and applicative issues. For applicative issues: what is the typical time of foam ageing (for a polydisperse foam) in…