Increase in Thermal Stability of Hydride of the Titanium

The paper presents the results of studies of the modification of the surface of a fraction of titanium hydride with borosiloxanes in order to increase its thermal stability at high temperatures and protect titanium from oxidation for possible use as a heat-resistant neutron-protective material in nuclear power engineering. A theoretical model has been developed for modifying a fraction of titanium hydride with borosilicate bysol-gel technology from aqueous solutions of sodium organosilicinate and boric acid. The technology for modifying titanium hydride consists in the preliminary chemical activation of the surface of the fraction by a silicone oligomer - sodium organosilicinate (OSN) followed by treatment with boric acid, separation of the solid phase of titanium hydride and subsequent drying at 100 ∘C. During the synthesis of sodium borosilicateand its thermal treatment in the temperature range 100-500 ∘C, complex structuralphase rearrangements were observed. At 100 ∘C, an amorphous-crystalline silicate of CH3 (Si30.4B1.6O64) Na monoclinic syngony with large crystal lattice parameters was formed. The thermal treatment of the borosilicate coating at 300 ∘C led to achange in the radiographic characteristics of the crystalline phase and the formation of a monoclinic NaBSi2O5(OH)2 structure with continuous layers of silicon-oxygen tetrahedra. Further crystallization of borosilicate at a temperature of 500 ∘C leads to the formation of a silicate of the skeleton type NaBSi3O8 of triclinic syngony. Above 500 ∘C, sodium borosilicate passes into a glassy state. &nbsp

Astronomy in Ukraine

The current and prospective status of astronomical research in Ukraine is discussed. A brief history of astronomical research in Ukraine is presented and the system organizing scientific activity is described, including astronomy education, institutions and staff, awarding higher degrees/titles, government involvement, budgetary investments and international cooperation. Individuals contributing significantly to the field of astronomy and their accomplishments are mentioned. Major astronomical facilities, their capabilities, and their instrumentation are described. In terms of the number of institutions and personnel engaged in astronomy, and of past accomplishments, Ukraine ranks among major nations of Europe. Current difficulties associated with political, economic and technological changes are addressed and goals for future research activities presented.Comment: Paper to be published in ``Organizations and Strategies in Astronomy'' -- Vol. 7, Ed. A. Heck, 2006, Springer, Dordrecht; 25 pages, 2 figs, 2 table

Preparation of crystalline Mg(OH)2 nanopowder from serpentinite mineral

In this paper we describe a route to produce crystalline Mg(OH)2 nanopowders from serpentinite ore distributed in the Halilovskiy array (Russia, Orenburg region). An efficient extraction route consisting of treatment on serpentinite in 40% HNO3 at 80 C followed by NH4OH titration for Mg(OH)2 precipitation was demonstrate

Formation of a tourism brand of Rostov region for foreign tourists

The authors of the article focus both on aspects of Linguocultural training of professionals to work with foreign tourists and on the problem of the choice of the tourism brand of Rostov Region, its historical stages, as well as the issue of the lack of a systematic approach to its formatio

Certainty and opinion: Wittgenstein's context

В статье рассматриваются основания семантики достоверности Л. Витгенштейна, базирующейся на анализе структуры предложений естественного языка.У статті розглядаються основні засади семантики достовірності Л. Вітгенштейна, що базується на аналізі структури речень природної мови.In article is considered the bases of semantics of the сertainty L. Wittgenstein’s, which is based on the analysis the structure of the offers of a natural language