Materials Literature
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Undoped and CaSiO3-doped CaCu3Ti4O12 (CCTO) ceramics were prepared by solid-state reaction. The structures and compositions were characterized by a field-emission transmission electron microscope, equipped with Gatan image filter and high angle annular dark filed detector. We observed the low-frequency plateaus of fre…
This paper presents a new innovative technological solution idea to automatically quantify the yarn mass parameters (hairiness, diameter and mass), the yarn production characteristics (snarls length, number of cables, fibres orientation and cables orientation) and the yarn surface porosity, as well as the yarn associa…
Abstract Due to its high ionic conductivity level, BaIn 0.3 Ti 0.7 O 2.85 (BIT07) is a potential electrolyte material for SOFC. In order to validate the use of this material, its chemical, mechanical and electromechanical compatibilities with three classical cathode materials (La 0.7 Sr 0.3 MnO 3 – δ (LSM), La 0.58 Sr…
Large strip-wound amorphous iron cores for 60 Hz distribution transformers have been commercially manufactured for almost two decades. For megawatt-scale power electronics applications with transformer operating frequencies in the low kilohertz range, these cores offer interesting characteristics. This paper presents…
Two species of Nupela were identified in a spring and in a small spring-fed pool in the Polish Tatra Mts, - these were N. lapidosa and Nupela sp. The second species is described as N. marvanii. The new species is characterized by heteropolar, narrowly elliptic valves with capitate apices. Sternum valve has very short,…
The PDF is the preface of the proceedings volume of the 14th International Conference on X-ray Absorption Fine Structure (XAFS14) held in Camerino, Italy, 26–31 July 2009.
The scope offered by radiation technology for polytetrafluoroethylene modification was discussed. New modified materials possess enhanced antifriction and compressive parameters and are suitable for different commercial applications.
The inhibition of mild steel corrosion in 0.5 M sulphuric acid by the symmetrical acetylenic alcohol 2-butyne-1,4-diol is investigated. Weight loss and electrochemical impedance data consistently indicate inhibition efficiencies up to 98%. Short-term impedance measurements reveal that the interfacial inhibition is a f…
Magnesium offers significant weight savings over competitor structural materials but also technical challenges, solutions to which in some cases requires improved fundamental understanding. An overview of research on the forming, joining and corrosion protection of magnesium for structural applications is given, with…
Surface modification with hydrophobins is very important for cell adhesion in its applications in biosensor fabrication. In this study, we modified the surface of three-dimensional electrospun poly(lactide-co-glycolide) (PLGA) scaffolds with hydrophobin HFBI and collagen, and investigated its applications for cell adh…
It is widely thought that in steady, gravity-driven, unobstructed soap-film flows, the velocity increases monotonically downstream. Here we show experimentally that the velocity increases, peaks, drops abruptly, then lessens gradually downstream. We argue theoretically and verify experimentally that the abrupt drop in…
Thin-film ferroelectric capacitance can be obtained by 2 different methods. Capacitance obtained using the derivative of its hysteresis loop is related to large applied signals and can be called the large-signal capacitance. Capacitance measured directly with a small, applied ac signal together with a slow changing dc…
The cooling water chemistry has changed steadily over the past decade. Use of high performance antiscalants, corrosion inhibitors, polymer for better dispersion, total prevention of microbial deposits by using powerful biocides and biodispersants, pH boosters and advanced hardness stabilizers is the current practice.…
In the present work, a synthetic effluent of phenol was treated by means of a total oxidation process-Catalyzed Wet Oxidation (CWO). A mixed oxide of Mn-Ce (7:3), the catalyst, was synthesized by co-precipitation from an aqueous solution of MnCl2 and CeCl3 in a basic medium. The mixed oxide, MnO2/CeO2, was characteriz…
The effects of a constant uniform magnetic field on dendritic solidification were investigated using an enthalpy based numerical model. The interaction between thermoelectric currents on a growing crystal and the magnetic field generates a Lorentz force that creates flow. The need for very high resolution at the liqui…
The type material of Gomphonema rosenstockianum LANGE-BERT. et E. REICHARDT from La Gomera (Canary Islands, Spain) and epilithic material of rivers from several European countries were examined using light and scanning electron microscopy in order to improve the knowledge on the taxonomical status of the G. rosenstock…
In this article, we report on a novel technique for fabricating an electrically switchable Fresnel lens made from liquid-crystal–polymer composite. The Fresnel pattern is formed by means of interference between two planar and spherical wavefronts reflected from a single plano-convex lens. The simplicity of the procedu…
The antinociceptive, anti-inflammatory and diuretic properties of the extracts of P. barbatum (L.) Hara var. barbata, Polygonaceae, at the doses of 200 and 400 mg/kg body weight, were evaluated in mice/rat models using, respectively, the acetic-acid-induced writhing method, the carrageenan-induced edema test and the L…
An untreated wool fabric was bleached both with sodium borohydride (SBH) in the presence of sodium bisulphite (SBS) solution and with a commercial H 2 O 2 bleaching method. The concentration effects of SBH and SBS, bleaching time, pH and temperature on SBH bleaching process were investigated. Whiteness, yellowness and…
The electric field-induced phase transformation behavior in lanthanum-doped lead zirconate titanate ceramics was examined by polarization versus electrical field (P-E) measurements carried out from room temperature to 130 degrees C and under hydrostatic pressures from 20 to 300 MPa. The samples with composition (Pb(1-…