Materials Literature
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The variations of impact strength and compressive strength of unsaturated polyester based sisal/glass hybrid composites with fiber loading have been studied. The impact strength of these hybrid composites has been found to be higher than that of the matrix, whereas a marginal decrease was observed in the compressive s…
The synthesis of layered double hydroxides (LDHs) by hydrothermal-LDH reconstruction and coprecipitation methods is reviewed using a thermodynamic approach. A mixture model was used for the estimation of the thermodynamics of formation of LDHs. The synthesis and solubility of LDHs are discussed in terms of standard mo…
Abstract Molecular probes can be employed in three different ways for the characterization of nanoporous adsorbents. The simplest approach is to use a range of globular nonpolar molecules of different diameter in order to assess the effective size of the pore entrances in a molecular sieve. For this purpose, conventio…
The percentage distributions of Fragilaria and Staurosira taxa in surface sediment samples from 40 oligo- to ultra-oligotrophic, pH neutral to alkaline, mountain lakes of the central Austrian Alps (Niedere Tauern) were studied in relation to environmental variables using multivariate statistics. Selected taxa that wer…
Abstract XPS analysis of different forms of copper sulfate, including antlerite, brochantite, posnjakite, chalcanthite and anhydrous copper sulfate, as well as pure copper and its oxides cuprite and tenorite, was carried out. These products most often occur when dealing with atmospheric corrosion of copper and bronze…
Metal phthalocyanines can be very efficient as catalysts and photocatalysts in oxidation reactions using molecular oxygen as oxidant. Different types of soluble low molecular weight or oligomeric and insoluble heterogeneous catalysts and photocatalysts were developed. The heterogeneous metal phthalocyanines exist eith…
We present measurements of the spin and orbital magnetic moments of ${\mathrm{F}\mathrm{e}}_{3}{\mathrm{O}}_{4}$ by using SQUID and magnetic circular dichroism in soft x-ray absorption. The measurements show that ${\mathrm{F}\mathrm{e}}_{3}{\mathrm{O}}_{4}$ has a noninteger spin moment, in contrast to its predicted ha…
Using microporous zeolites as host, sub-nanometric ZnO clusters were prepared in the micropores of the host by the incipient wetness impregnation method. A small amount of sub-nanometric ZnO clusters were introduced into the channels of HZSM-5 zeolite, whereas a large quantity of sub-nanometric ZnO clusters can be acc…
OBJECTIVE: Nephrogenic fibrosing dermopathy (NFD) is a newly recognized cutaneous fibrotic disorder occurring in individuals with end-stage renal disease (ESRD). The aim of the present study was to describe the clinical and histopathologic features of 9 new cases and to characterize the inflammatory cells and expressi…
Abstract A program for quantitative evaluation of x‐ray photoelectron spectra has been developed to serve as a practical tool for surface chemists. The program uses the ‘classic’ approach of quantification and requires as input the integrated intensities of the measured XPS lines. The usual correction methods and fact…
Abstract The development of ‘user‐friendly’ surface analytical instrumentation has expanded the application of x‐ray photoelectron spectroscopy (XPS) towards softer and more complex composite materials. However, the knowledge of fundamental phenomena in practical, interdisciplinary applications is dearly needed. In th…
Abstract The effect of plasticizers, glycerol, sorbitol and poly(ethylene glycol) 400 (PEG 400), on mechanical and barrier properties of rice starch film has been investigated. Sorbitol‐ and glycerol‐plasticized starch films appeared homogeneous, clear, smooth, and contained less insoluble particles compared to unplas…
This study demonstrates a simple and highly reproducible method for fabricating well-defined nanostructured polymeric surfaces with aligned nanoembosses or nanofibers of controllable aspect ratios, showing remarkable structural similarity with interesting natural biostructures such as the wing surface of Cicada orni a…
Recent studies of the characteristics and mechanism of hydrogen related failure in steels are overviewed. Based on an analysis of the states of hydrogen in steels, the role of hydrogen in reducing ductile crack growth resistance is attributed to the increased creation of vacancies on straining. Cases showing the invol…
Abstract Polymer–multiwalled carbon nanotube composite films were fabricated using two types of polymer matrices, namely poly(vinyl alcohol), (PVA) and chlorinated polypropylene. In the first case, the PVA was observed to form a crystalline coating around the nanotubes, maximising interfacial stress transfer. In the s…
Abstract Sulfur-bridged octadehydro[20]annulene 1c annelated with two TTF rings was synthesized and its multi-functional properties were ascertained. The annulene exhibits paratropicity, solvatochromism, electrochromism and multi-redox potentials in solution, and its cation radical in the solid state shows self-associ…
Submonolayer thin films of a three-ring bent-core (that is, banana-shaped) compound, m -bis(4- n -octyloxystyryl)benzene ( m -OSB), were prepared by the vacuum-deposition method, and their morphologies, structures, and phase behavior were investigated by atomic force microscopy (AFM) and transmission electron microsco…
The influence of Ni−Y catalyst composition on the bulk scale synthesis of single-walled carbon nanotubes (SWNTs) is studied using solution phase near-infrared spectroscopy. We found that a wide range of catalyst concentrations (3−6 atom % Ni and 1−2 atom % Y), allow efficient production of high-purity as-prepared (AP-…
Assemblies of Au (core)−Pt (shell) nanoparticles were prepared by chemical deposition of Pt metal onto colloidal Au particles that self-assembled onto substrates, since PtCl 6 2 - may be reduced to Pt(0) by the mild reducing agent NH 2 OH in the presence of gold nanoparticles. It is shown that the Pt deposition is iso…
Nanoblended multilayer thin films were formed by the layer-by-layer assembly of poly(allylamine hydrochloride) (PAH) and a binary mixture of single-stranded deoxyribonucleic acid (DNA) and poly(sodium styrenesulfonate) (PSS). UV−vis spectrophotometry was used as a facile means to determine the proportion of DNA and PS…