Materials Literature
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Planar structures consisting of oxidized copper granules obtained by laser electrodispersion are studied. The samples have different packing densities of granules and different amounts of their chains and aggregates. Each granule 5.5 ± 0.5 nm in size consists of a copper core with an amorphous structure and an oxide s…
This paper focuses on the dependence of the rheological properties of PLA-PEG and PLGA dispersions and films on the polymer structural properties, in order to obtain useful information to predict and explain the performance of polyester films as drug-delivery systems. In this study, one PLA-PEG and three PLGA polymers…
Terminalia bellerica (Bahera), a natural gum, was used as an additive in water-based natural rubber adhesive formulations. The lap shear strength of joints with wood substrates increased with the increase of natural gum concentration up to 80 phr (parts per hundred parts of rubber) loading. Similarly, the peel strengt…
Experimental studies have been carried out to produce single-walled carbon nanotubes (SWCNTs) by pulsed wire discharge (PWD). To prepare soot, carbon fibers were discharged in nitrogen gas by PWD. Soot was collected after the discharge and was observed by means of high-resolution transmission electron microscopy. In t…
The purpose of the present work was to clarify the effects of parameters of porous ceramics on the characteristics of composites fabricated by high-pressure infiltration. Alumina with different porosity (15–70 vol%) and pore morphology was successfully fabricated by gelate-freezing and the partial-sintering, respectiv…
The near-IR luminescence in thin films of metal-free phthalocyanine and phthalocyanine complexes is investigated at room temperature. It is shown that the intensity of the luminescence peaks depends on the polymorphic modification and the structure of the complexes, whereas the peak positions remain virtually unchange…
Alkaline-earth (M2+) aluminates MAl2O4 doped with Eu2+ show efficient fluorescence and phosphorescence. In this study the properties of the concentrated europium aluminate EuAl2O4 and of samples partially substituted with Ca2+, Sr2+, Ba2+ are investigated. X-ray diffraction data and a characterisation of the luminesce…
A combination of poly(diphenylmethane diisocyanate) (PMDI) and stearic anhydride was investigated as a new compatibilizer system for improving the interfacial adhesion between wood and polyethylene (PE). The treatment of wood flour with PMDI increased both the modulus-of-rupture (MOR) and the modulus-of-elasticity (MO…
Liposomes are known to be taken up by the liver cells after intravenous injection. Among the few techniques available to follow this process in vivo are perturbed angular correlation spectroscopy, nuclear magnetic resonance spectroscopy, and scintigraphy. The study of the intracellular pathways and liposomal localizat…
The trace additions of Ag to binary Al-Mg alloys promote precipitation of a phase in the under-aged condition. The structures of the phase in an Al-10 Mg-0.5 Ag (mass%) alloy have been characterised using transmission electron microscopy and electron microdiffraction. An icosahedral quasicrystalline phase, which is id…
A well-defined compositionally-equivalent linear analog to a previously reported hyperbranched fluoropolymer (HBFP) was synthesized and each was subjected to characterization studies as a fundamental investigation of the role of architecture on solution and solid-state properties. Condensation polymerization of 3-{[(t…
Sodium niobate based ceramics doped with Mn atoms have been sintered from oxides. The Bi co-dopants were introduced to increase the solubility limit for Mn atoms. Two series of samples were heated at lowered air pressure to produce oxygen nonstoichiometry. X-ray Absorption Near Edge Structure (XANES) spectra at Mn K-e…
Polyacrylonitrile fibers were electrospun yielding diameters in the range of 50 to 200 nm. These nanofibers were then immersed in an aqueous coating solution to deposit a continuous film of titanium dioxide on the surface. In order to shorten the coating time and optimize the metal oxide layer thickness, the fibers we…
To control the interactions between surfaces and biological systems, it is common to attach polymers, proteins, and other species to the surfaces of interest. In this case, surface modification of polydimethylsiloxane (PDMS) was performed by exposing PDMS films to the effluent from a microwave ammonia plasma, with a g…
The characteristics of corrosion inhibitors of the tolitriazole (TTA) for the carbon steel 1008, covered by zinc or tricationic phosphate (Mn, Zn, Ni), in the means of H 2 SO 4 0.1 mol L -1 and NaCl 0.5 mol L -1 , were investigated by physical and electrochemical methods. The results obtained in the absence of the ini…
The tribochemical treatment of glass and grains surface area as a crystallization activating factor and its influence on the crystal phase formation is a subject of the study. Sheet glass SiO2–CaO– Na2O as a material of extremely small crystallization ability has been used in the investigations. Tribochemical activati…
The leather industry is categorized as a polluting industry because of the large chemical usage and the generation of solid wastes. It is estimated that as much as 62-75% of the skins appears as solid waste. Fleshings generated in the liming process constitute 50-60% of the total solid waste generated in the industry.…
Abstract This article examines the high-temperature oxidation of silica-forming ceramics under constant temperature and cyclic conditions. The effects of water vapor, impurities, and molten salts are discussed. The article describes the oxidation and corrosion of silica-forming composites, oxide ceramics, non-silica f…
Abstract The effect of the acidity of the environment on the topography and photophysics of sensitizer molecules in homogeneous solutions, and when embedded in a lipid microenvironment, was studied. Four hematoporphyrin (HP) analogs were studied, which have chemical “spacers” of varying lengths between the chromophori…
The data base on the corrosion behavior of Zr alloy materials under BWR conditions was evaluated with respect to the burnup target of 70 MWd/kgU. At high bumups, corrosion rate and the rate of hydrogen pickup (HPU) may increase. This onset of increase obviously depends on the material, but also seems to be significant…