Feasibility study of the creation of a special coke production in Kazakhstan

The article examines the issues of creating a special coke production in the country. The objectives of the study were to assess the technical and economic feasibility of organizing such production. In the course of the study, the production program, investment estimates and a model of financial and economic payback of the project were calculated. The study confirms the effectiveness of creating a special coke production in Kazakhstan, and the project itself can be recommended for implementation

The feasibility study for the creation of production based on technology of lost-foam casting

The problems of establishing a new foundry in Kazakhstan utilizing Lost-foam casting technology are discussed in this article. The study’s main objectives are to determine the technical and financial viability of arranging such production in the country. Calculations of the manufacturing program were carried out as part of the study, and a financial- economic model of the project was developed. The research shows that establishing such a foundry is feasible, and the project may be recommended for execution

The feasibility study for the creation of production based on technology of lost-foam casting

The problems of establishing a new foundry in Kazakhstan utilizing Lost-foam casting technology are discussed in this article. The study’s main objectives are to determine the technical and financial viability of arranging such production in the country. Calculations of the manufacturing program were carried out as part of the study, and a financial- economic model of the project was developed. The research shows that establishing such a foundry is feasible, and the project may be recommended for execution

Feasibility study of the creation of a special coke production in Kazakhstan

The article examines the issues of creating a special coke production in the country. The objectives of the study were to assess the technical and economic feasibility of organizing such production. In the course of the study, the production program, investment estimates and a model of financial and economic payback of the project were calculated. The study confirms the effectiveness of creating a special coke production in Kazakhstan, and the project itself can be recommended for implementation

The influence silicon dioxide nanoparticles on mechanical properties of erythrocyte and platelet membranes estimated by atomic force microscopy method

The investigation performed within the Programs of State Research “Energy systems, process and technologies”, project 2.2

Study of thermal effects of silicate-containing hydroxyapatites

The possibility of modifications of hydroxyapatite silicate ions, from the extracellular fluid prototype solution under near-physiological conditions has been studied. Formation of silicon-structured hydroxyapatite with different extent of substitution of phosphate groups in the silicate group has been established through chemical and X-ray diffraction analyses, FTIR spectroscopy and optical microscopy. The results obtained are in agreement and suggest the possibility of substitution of phosphate groups for silicate groups in the hydroxyapatite structure when introducing different sources of silica, tetraethoxysilane and sodium silicate, in the reaction mixture. Growth in the amount of silicon in Si-HA results in the increase in the thermal stability of the samples. The greatest mass loss occurs at temperatures in the range of 25-400 °С that is caused by the removal of the crystallization and adsorption water and volatile impurities. It is shown that the modified apatites are of imperfect structure and crystallize in a nanocrystalline state

Crimean-Congo Hemorrhagic Fever: Epidemiological and Epizootiological Situation in the Russian Federation in 2022, Incidence Forecast for 2023

The review presents an analysis of the epidemiological and epizootiological situation on Crimean-Congo hemorrhagic fever (CCHF) in the Russian Federation in 2022. The incidence rate of CCHF registered in 2022 (59 cases) was 1.2 times higher as compared to 2021, however, below the long-term average annual values. The mortality rate was 10.2 %, which exceeds the indicators of long-term observations (in 2012–2021 – 3.2 %). Following epizootiological survey of stationary observation points, it was found that the number of Hyalomma marginatum imago in 2022, in general, corresponded to the average long-term indicators. CCHF virus isolates circulating in Russia in 2017–2022 belonged to the genetic lines “Europe-1” (V), “Europe-2” (VI), and “Europe-3” (VII). The ratio of CCHF virus genovariants in the population on the territory of the Russian Federation in 2017–2022 didn’t change. Based on the analysis of naturalclimatic factors, the forecast for the incidence of CCHF in the Russian Federation for 2023 has been made

Ultrasound of Acute Appendicitis in the Admission Room of a Multidisciplinary Surgical Hospital

Ultrasound (US) for diagnosing acute appendicitis (AA) and its complications in the admission room may be used as a primary diagnostic method in urgent patients. A total of 180 adult patients underwent US for suspected appendicitis; these results showed high possibilities in pathology screening and differential diagnosis from similar clinical diseases. The accuracy of US in detecting AA with obvious clinical findings and typical position is 100%, but in retrocecal and retroperitoneal forms, it decreases to 84%. With our algorithm of the right iliac and localized pain regions, US scanning optimizes the screening of patients with suspected AA presented in the admission room

Graft Polymerization of Stearyl Methacrylate on PET Track-Etched Membranes for Oil–Water Separation

In this article, results of PET track-etched membranes (PET TeMs) hydrophobized by photo-induced graft polymerization of stearyl methacrylate (SM) inside the pores were presented. The effects of monomer concentration, time of irradiation and the nature of the solvent on the degree of grafting and membrane morphology were investigated. The PET TeMs with pore diameters ranging from 350 nm (pore density of 1 × 108 pore/cm2) to 3.05 µm (pore density of 1 × 106 pore/cm2) were hydrophobized and tested for oil–water separation by using hexadecane–water and chloroform–water emulsions. Studies have shown high separation performance for membranes (up to 1100 mL/m2·s) with large pore diameters while achieving a high degree of purification. © 2022 by the authors.Belarusian Republican Foundation for Fundamental Research, BRFFR: F20MS-025; Ministry of Education and Science of the Republic of Kazakhstan: AP09057934This research was funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan (Grant No. AP09057934) and the grant of the Belarusian Republican Foundation for Fundamental Research (BRFFR) No. F20MS-025 of 04.06.2020