Materials Literature
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Despite the fact that Japan has in the past set the maximum radiation exposure for citizens at 1 millisievert, the government has now increased that amount to 20 millisieverts for Fukushima school children. Defending this twentyfold increase, the Japanese Ministry of Education, Culture, Sports, Science and Technology…
On April 11, the Nautilus Institute for Security and Sustainability published a report entitled The Path from Fukushima: Short and Medium-term Impacts of the Reactor Damage Caused by the Japan Earthquake and Tsunami on Japan's Electricity System (Executive Summary). The document, authored by a team headed by David von…
Using geometrical thermodynamics methods possible versions of Gibbs energy are found and their dependence on temperature and concentration of components in a diphasic zone at equilibrium crystallization of alloys of eutectic type.
To study the reaction sequences of formation of solid solution zirconate-lead titanate (PZT) in this work, we took into account the effect of adding oxide dopants on the progress of the reaction, so we added oxides ZnO, Cr2O3, Sb2O3 to our material composition in small quantities so that the solid solution must verify…
One of the possible ways to solve the problem of improving the integration of polypropylene prostheses in the tissue of the patient in the treatment of hernias of the abdominal wall is the application, making and use of composite polypropylene mesh with a coating of own fibroblasts. In the experiment on the basis of m…
A new species, Atractosomus amazonicus sp. nov. is described and three species, A. robustus Candèze, 1859, A. carinatus Candèze, 1859 and A. conicicollis Candèze, 1859 are redescribed and illustrated. A comparison among these species and with the type-species, A. flavescens (Germar 1839) is presented. A.amazonicus sp.…
During the work the structure and corrosion stability in buffer solutions of various acidity of the nanostructural nitinol after various processing was investigated. Concentration of metals in the solution was measured by means of the atom-issue spectrometer with induction plasma. The greatest concentration of metals…
The purpose of the present work is developing the requirements for the chemical modifiers defining their suitability in extrusion technology for formation of articles from concrete and reinforced concrete. Experiment has been made by use of possibility of IK MGT to register synchronously the changes of pressure, volum…
The shortcomings of compensation zero creep method for the measurements of surface tension for metals σ in the solid state and obstacles of high-temperature measurements in vacuum are analyzed in present paper. The device for σ measurement, in which the shortcomings of traditional methods were eliminated, is suggested.
This paper presents mathematical modeling based on the regression analysis method by active experiment of a thermal treatment process applied to an alloy belonging to Al-Zn system, which finds application in aeronautics. Using the mathematical model determined on a statistical basis, we achieved the prediction of the…
The issue of using steelfiber for dispersed reinforce of fine-grained concrete is considered in the article. Research of steelfiber concrete patterns based on cement and compositional astringent material was held. The fine-grained cement and the binder with low water demand were used as the main binder. It is establis…
4-ChloroMethyl Styrene (CMS) was copolymerized with different monomers such as Methyl MethAcrylate (MMA), Methyl Acrylate (MA), 2-EthylHexyl Acrylate (EHA) by free radical polymerization method at 70 ±1°C using a,a'-Azobis(IsoButyroNitrile) (AIBN) as an initiator. The copolymer compositions were obtained using related…
Gemini surfactants, butanediyl 1,4-bis(dimethyl cetylammonium bromide), pentanediyl 1,5 - bis (dimethyl cetylammonium bromide) and hexanediyl 1,6 - bis (dimethyl cetylammonium bromide) from Alkanediyl-α, ω-bis (dimethyl cetylammonium bromide) series were synthesized in laboratory and were characterized by using Nuclea…
The influence of thermostimulated segregation on morphology of Cu-22,5 at. % Mn alloy surface was investigated by low energy electron diffraction means. Surface structural perfection of the alloy is estimated by the diffraction reflection.
In this paper we present calculated isothermal-isomorphic dependencies of specific surface energy ( σ ), its isochoric derivative respecting to the temperature ( σ’ ), and surface pressure ( Psf ) versus size of nano-diamond of 12C and 13C at 100K and 4300K . It is shown that ratio σ(12C)/ σ(13C) decreases at reductio…
The processes of the photochemical formation of nanoclusters of the tetra- and pentavalent uranium complexes with organic ligands on light-diode irradiation (430 - 450 nm) of UO2(ClO4)3*5H2O solutions in acetone were studied by the methods of electronic and IR absorption. The possibility for deposition of the complexe…
In the aerospace industry, laser beam welding has been considered as one of the most promising routes among the new manufacturing processes. Substitution of riveting by laser beam welding of aircraft structures has contributed to weight and cost savings. Concurrently, new aluminum alloys have been developed with the a…
The application of technologies to extend the postharvest life of mangosteen fruit was studied and compared to storage at 25 °C/70-75%R.H (25 °C control treatment). The fruits were packed in expanded polystyrene (EPS) trays (5 fruits/tray). Five treatments were carried out at 13 °C/ 90-95% RH: application of carnauba…
The use of thin shells with the filler in the building industry as one of the most efficient types of building structures are considered in this paper. The fields of application of thin shell structures are specified, including civil, industrial and hydraulic engineering. Theoretical researches of the joint performanc…
Se obtuvieron aleaciones austeníticas del sistema Fe-Mn-Al, en el intervalo Fe-(4,9~11,0 wt% de Al)-(17,49~34,3 wt% de Mn)-(0,43~1,25 wt% de C), las cuales fueron fundidas en un horno de inducción a partir de materiales de alta pureza. Las aleaciones se evaluaron con respecto a fenómenos de corrosión, erosión en medio…