The article analyzes the results of previous studies of the Zirabulak ore field, and examines the data of recent years. The Zirabulak mining district covers the low-mountain uplifts of the Nurabad district of the same name in the southern part of Samarkand and, partially, Navoi regions. Geologically, it forms the northern flank of the Zeravshan-Alai structural-formation (metallogenic) zone, which is adjacent from the south to the Kuldzhuktau-Zeravshan regional zone of the west-northwestern strike. Based on the collected information and based on the geological conditions of ore content, stratigraphy, and magmatism of the region, the ore field deposits can be divided into two geological and industrial types: gold-quartz and gold-sulfide-quartz
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The article analyzes the specific features of the formation of the visual image of the "Soviet woman" against the background of various historical situations and contexts. The role of photographs in the press and other visual media in Soviet propaganda was evaluated and they were considered as an important source revealing the essence of the Soviet ideology. This makes it possible to reconstruct the worldview of the people of that time, to trace the origin of some stereotypes that are preserved to this day.
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Nowadays, in the course of education, it is necessary to equip all subject teachers with new pedagogical technologies and interactive methods and continuously improve their skills in applying the acquired knowledge in educational activities. Fundamental reform of education and introduction of advanced pedagogical technologies in the national personnel training program; It is shown that it depends on “advanced pedagogical technologies of education, creation of modern teaching-methodical complexes and didactic support of the educational process”.
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The content of the requirements for the competence of future pedagogues is mentioned in the State educational standards for the training of bachelors in the field of pedagogy from the countries of the Commonwealth of Nations, such as Russia and Belarus.
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During the digitization of this article, conducted study aimed at improving the financial stability and financial performance of state-owned enterprises. Ways of effective use of debt and capital have been researched to ensure financial stability, and the role of the digital economy in improving financial activity has been organized.
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Occupational safety activities should be planned on the basis of management theory, which uses a systematic approach to develop goals, criteria, methods and controls. The methodology of the systems approach allows us to reveal the internal connections of the process being studied and determine the main management functions. For optimal planning of occupational safety measures in order to effectively use available resources, it is necessary to create a management system that, based on mathematical methods, provides information analysis, adoption and implementation of management decisions.
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A methodology has been proposed for highly selective and highly sensitive extraction photometric determination of mercury with dithione. Mercury (II) from a highly acidic environment in the presence of iodide ions and dimethylformamide (DMF) has been found to be quickly and selectively extracted by chloroform and benzene. When chloroform or benzene solution of dithione and buffer solution with pH 2.5-14 is added to the extract and the aqueous-organic phases are shaken during 5-10 seconds, a painted complex compound is formed. The apparent molar repayment rate at a maximum light absorption of 610 nm is 7.1·104. The determination of mercury (II) is not prevented by 10,000 to 60,000 foreign ions within an error range of 2-5%. The developed method has been applied to the analysis of industrial wastewater. The analysis time is 2-3 minutes, relative to the standard deviation of 0.02. The correctness and reproducibility of the method has been verified by the methods of additives in waste water. The method can be used to determine micro-containing mercury in air, biological materials, ores, rocks and other chemically complex materials without prior separation of accompanying elements. The paper investigates conditions of selective extraction of a colorless halogenic complex of mercury (II) by inert organic solvents and its complexation with dithione directly in an organic phase, with the purpose of development of a highly selective, simple and accelerated method of extraction-photometric definition of mercury without preliminary separation of accompanying elements. As a result of the research, a new highly selective, accelerated and simple extraction-photometric method for determining mercury directly in the organic phase has been developed. Therefore, the developed method of extraction-photometric determination of mercury is recommended for the analysis of mercury in industrial wastewater, ores, rocks, concentrates, industrial waste and other chemically complex materials.
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In scientific researches, the method of thermal analysis was applied to wood shavings untreated with polymer glues and urea-formaldehyde, acrylic styrene copolymer, and polymerized melamine in different proportions (1:1:0.5), (1:1:1), (1:0.5: 1) was studied on the basis of a relative comparison of the thermal stability of boards based on wood scraps treated with used polymer glues, and according to the results obtained, it was determined that the thermal stability of wood scraps modified with polymer glues obtained in a ratio of 1:0.5:1 had higher thermal properties than other compositions.
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SCIENCE & INNOVATION