Materials Literature
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The results of experimental investigation of the viscoelastic properties of polymeric elastomer composites on the base of the nitryl-butadien rubber are presented. The elastomeres contained about 50% by weight of the technical carbon N 110. The tests on the stress relaxation under tension and compression of the specim…
The interaction of the surface of a pure metal or an alloy with the surrounding atmosphere occurs in a highly complex interfacial regime. During atmospheric corrosion this interfacial regime involves the metal surface, often covered by a naturally formed oxide layer of a few nanometers thickness; an aqueous adlayer, t…
The purpose of this report is to examine whether there is any connection between the multi-storey wooden buildings, industrial construction and environmental impact. In the early 1960’s prefabricated parts were used to build “Miljonprogrammet”. This led to the streamlining of the construction process but the houses we…
The effect of intensive plastic deformation on chromium particle precipitation in a Cu-Cr-Zr alloy has been investigated. The experimental research of decomposition of Cr solid solution in Cu has been carried out by measuring specific electrical resistivity. The data obtained have been analyzed using the Avrami-Kolmog…
Micro flows find applications in a variety of topics covering biomedical, cooling, electronics and MEMS (micro-electro-mechanical-systems) applications. In this work, the destructive effects of hydrodynamic cavitation for biomedical treatment, heat transfer enhancement with nanostructures and nanofluids for small scal…
Historically, cytogenetic biodosimetry assays have been based on quantifying asymmetrical chromosome alterations in mytogen-stimulated T-lymphocytes in their first mitosis after radiation exposure. Increased levels of chromosome damage are a sensitive indicator of radiation exposure and they are routinely exploited fo…
T actitivity in LiPb LiPb mock-up material irradiated in Frascati: measurement and MCNP results
One of the most challenging tasks toward the full implementation of the hydrogen based economy is the reversible storage of hydrogen for portable applications. Three main approaches have been investigated to store the hydrogen, storage as a compressed gas or a liquid, or through a direct chemical bond between the hydr…
COO -(ПЭО)n .Es sind die Ergebnisse der experimentellen Untersuchung der mechanischen Haltbarkeit bei der Kompression der auf Grund der nanoperiodischen silikatischen und alymosilikatischen Stoffe syntesierten Blockerzeugnissen mit der porenreichen wabigen Makrostruktur dargelegt. Nanoperiodische Stoffe wurden durch d…
The introduction of boron into a silicon crystal lattice produces two sets of acceptor impurity states: (i) the "external" states (which include the acceptor ground state) which are associated with the P₃/₂ valence band maxima and are the usual impurity states lying in the forbidden gap, (ii) the "internal" states whi…
A systematic study of the Knight shift parameters has been carried out on single crystal specimens of tin and cadmium over a range from 1⁰ K to just below the melting points. The line widths observed in cadmium are approximately half the widths quoted by other workers, enabling more precise measurements to be made. Th…
Formulation is a complex science. Many functional molecules require formulation to enhance their aqueous solubility or to promote and protect their function. Understanding the interaction between the formulation components is a necessary first step in that process. This project focuses predominantly on quantifying the…
It comprises the following stages: preparation of enzyme extract, separation of high-molecular compounds of the extract from low-molecular compounds, enzyme concentration using dialysis method by means of PEG 20000, addition of enzyme extract to the substrate, maintaining the system at 40°C for 24 hours; titration of…
O presente trabalho teve como objetivo avaliar o comportamento de um aço do tipo AISI 304 em diferentes meios cloretados, bem como a influência de um concentrador geométrico de tensão (entalhe), quanto ao fenômeno CST. As técnicas de avaliação empregadas foram: deformação constante do eletrodo e carga constante no ele…
In this paper the heat transfer in the flow of polymer melts in different pipes and channels. After processing the experimental data obtained criterial equation of convective heat transfer, which can be used for the calculation of equipment for processing of polymers.
The goal of this thesis is the introduction and implementation of a new production method for Fresnel zone plates (FZP). The most popular methods for FZP production applied to date, do either involve structuring processes by EBL, or rely on the physical deposition of two materials with a very different refractive inde…
The authors investigated nonmetallic inclusions in pig-iron with spherical graphite. Influence of the initial grade of sulfur on impurity of a liquid with various dimensional groups of inclusions
Vertically well-aligned ZnO nanorods were synthesized without employing any metal catalysts on various substrates including glass, Si (111), 6H-SiC (0001) and sapphire (0001), which were pre-coated with c-oriented ZnO buffer layers, by simple vapor phase deposition. The in-plane alignments of ZnO nanorods depend on th…
La investigacion presenta los resultados obtenidos en la elaboracion de chamote mullitico fabricado por sinterizacion para la produccion de refractarios mulliticos. El diseno de experimentos para maximizar la produccion de mullita tiene tres variables: temperatura (tres niveles), tiempo de tratamiento termico (dos niv…
The article shows the results of specific total alpha activity investigation of radioactive nuclides and exposure rate in uranium tails deposits from tailings storage of the Stepnogorskiy hydrometallurgical plant. It is established that there is a background meaning excess of STAA in protection zone and beyond it.