The paper is devoted to the results of microscopic analysis structure fire-resistant materials developed on basis local mineral raw materials. authors point out that in this regard, a special place occupied by refractory materials, because use various radiation and designs microscopes from optical electronic requires preparation objects methods for deciphering observed images. Moreover, these r...

background: some particular areas contain natural radionuclide at levels much higher than those usually present in earth's crust. the radiological impact of the use of zirconium ore in zirconium industry is due to internal exposure of the lung by alpha particles and external exposure of the body by the gamma rays. the result of gamma spectrometry measurement of the concentrations of the na...