Materials Literature
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Those polymer anticancer-drug conjugates currently undergoing clinical evaluation have a tripartite structure; a water-soluble polymer, an anticancer agent and a pendant linker. To simplify the construct it would be attractive to develop anticancer polymer therapeutics that contain the bioactive agent as an integral p…
Ceramics of the melilite‐type compound La 1+ x Sr 1− x Ga 3 O 7−δ were prepared by conventional ceramic processing. Samples prepared represented the entire homogeneity region of the phase (i.e., x =−0.15 to 0.60). Electrochemical characterization under variable temperature and atmospheric conditions in the vicinity of…
The metastable nanocrystalline y form of gallium oxide has been prepared and its microstructure and thermochemistry have been studied for the first time by employing X-ray and electron diffraction, high-resolution transmission electron microscopy, adiabatic and differential scanning calorimetry. The randomly oriented…
The present contribution reports some interesting and new results obtained while developing yttria‐stabilized tetragonal zirconia (Y‐TZP) using spark plasma sintering (SPS). The experimental results clearly showed that ZrO 2 ‐nanoceramics with high hardness(∼14.5 GPa) can be processed at a lower sintering temperature…
The behavior at the air−liquid interface of a series of metal(II) metallo-organic polymers of 4-octadecyl-1,2,4-triazole has been studied. Interactions between those amphiphilic compounds and metal ions in the subphase result in the formation of stable monolayers and well-defined Langmuir−Blodgett (LB) films incorpora…
Ni/Y2 O3 – ZrO2 (Ni/YSZ) cermets are the most common anode materials for high temperature solid oxide fuel cells (SOFC). Electrode performance of Ni/YSZ cermets is critically dependent on the microstructure and distribution of Ni and YSZ phases in the cermets. This in turn is closely related to the characteristics of…
Stabförmige Zinn-Template wurden in der Synthese von einkristallinen ZnS-Nanoröhren vom Wurtzit-Typ eingesetzt. Die ZnS-Nanoröhren entstehen als strukturell einheitliche Einkristalle und sind teilweise mit Sn gefüllt (siehe Bild). Die meisten der Nanoröhren sind gerade, haben Längen von einigen Mikrometern, Durchmesse…
Kurzfassung Im vorliegenden Beitrag werden spannungsanalytische und bruchmechanische Untersuchungen zum ICE-Radreifenbruch beschrieben. Das Risswachstum beim ICE-Rad begann am Innenrand des Radreifens. Der Riss wuchs zunächst mehr in die Tiefe des Radreifens, um sich später in halbelliptischer Form auszubreiten. Erst…
The effect of twisting jet pressure, nozzle di stance, deli very speed, yarn linear density and fibre composition on the performance and lowstress characteristics of polyester-cotton Murata vortex spun yarns has been studied. The coarser ya rns produced usi ng the sa me conditions exhibit hi gher abrasion resistance,…
Power transformers can be sources of disturbing and annoying acoustic noise. This paper is a first phase report of a wider framework of study that investigates the noise radiation characteristics of air-cooled power transformers. The dynamics of the transformer core structure plays a significant role in the noise gene…
The aim of this study was to prepare and characterize a controlled-release system (microspheres) loaded with ibuprofen, for intra-articular administration, to extend its anti-inflammatory effect in the knee joint cavity. Among the bioresorbable polymers employed, poly(D,L-lactic-co-glycolic) acid (PLGA) (13137 Da) was…
Both natural graphite (NG) and home-made expandable graphite (EG) were blended with polypropylene (PP) and intumescent flame retardant (IFR) by a melt process. The resulting composites contain filler of 1–5 phr (parts per hundred parts of PP–IFR). The limiting oxygen index (LOI) and thermal gravimetric analysis (TGA)…
A new analytical model of high-speed friction was developed to account for the observed velocity dependence in sliding friction at high speeds and was successfully applied to the analysis of data previously reported by Jones et al. for a number of concrete penetration tests using ogive-nose projectiles of high-strengt…
Addition of Y 2 O 3 as a sintering additive to porous β‐SiAlON (Si 6− z Al z O z N 8− z , z = 0.5) ceramics has been investigated for improved mechanical properties. Porous SiAlON ceramics with 0.05–0.15 wt% (500–1500 wppm) Y 2 O 3 were fabricated by pressureless sintering at temperatures of 1700°, 1800°, and 1850°C.…
This paper represents a continuation of the work published by Boardman et al., who concluded that the mechanisms of lime stabilisation were distinctly different for two clays of different mineralogy: English china clay, for which short-term flocculation is dependent on pH and long-term strength is dominated by the pro…
The effects of a decreasing top electrode size on the electric and piezoelectric properties of tetragonal Pb(ZrX,Ti1−X)O3 thin films are investigated. The effective piezoelectric small-signal coefficient d33,eff and the piezoelectric large signal-strain S are measured using a double-beam laser interferometer. Both pro…
Abstract Electrochemical impedance spectroscopy (EIS) has become an important tool in Solid State Electrochemistry. Simple Kramers-Kronig transform data validation assures selection of high quality data for subsequent CNLS-fit analysis. Optimized starting parameters and probable equivalent circuit can be obtained thro…
The magnetoelectric effect in ferrite-piezoelectric composites is considered. A theory of the magnetoelectric effect in the electromechanical-resonance region for disk-shaped samples is presented. The magnetooptical coefficient is calculated for longitudinal and transverse orientations of electric and magnetic fields.…
In this paper we extend the phase-field model of crystallographic slip of Ortiz (1999 J. Appl. Mech. ASME 66 289–98) and Koslowski et al (2001 J. Mech. Phys. Solids 50 2957–635) to slip processes that require the activation of multiple slip systems, and we apply the resulting model to the investigation of finite twist…
Effective use of surfactants for corrosion inhibition requires appropriate information about the application environment and metal as well as the properties of the surfactant. Surfactant adsorption, which is a prerequisite to corrosion inhibition by surfactant molecules, is dependent on the properties of the surfactan…