Vol. 2 No. 12 (2020)

In the article, the durability of building materials under certain natural and climatic conditions remains one of the most unsolved problems. Each location is different and it is said that the surrounding materials are checked simultaneously and regularly under the influence of a number of factors.

In the state predostavlena, v issledovaniy yavilos ustanovlennыe vliyaniya dobavok poverxnostno - aktivnyx veshchestv na prochnostnыe pokazateli tsementnyx sistem. Definitions were made on cement of various mineralogical composition, svejemolotom and lejalom and on tsementno- peschannyx solutions and betonax.

The main purpose from this paper, in semiconductor technology silicon oxide is to study notable of the surface and catalysis process. As a result, cluster fragmentation processes, we obtained information about the emission of the clusters and the chemical and physical properties of the clusters. We found during the study that oxide clusters are heterogeneous clusters.  In heterogeneous clusters, the bonds in the main chain are different from the bonds in the side chain, as in organic polymers.  We tried to prove on the basis of the analysis of experimental data that the formation, excitation and molecular decomposition of Si_nO_{2n + 1}H_k- (k = 1-3) cluster ions are based on the model of the combinatorial synthesis mechanism.

An algorithm for calculating multi-span continuous beams is developed on the basis of the integral deformation modulus method. This takes into account the nonlinear and nonequilibrium properties of concrete deformation, the rheological equations of the mechanical state.   

The work describes the genetic types and conditions for the localization of mineralization - individual deposits and ore occurrences. Also, the indicated mineralized zones, the conditions of occurrence of the mineralization, the geological-structural position and the peculiarities of the host complexes. Descriptions of promising tungsten, tin ore, polymetallic, mercury and other ore zones, which serve as a reserve in expanding the resource base in the Republic, are given. Tungsten, tin ore, and mercury mineralizations are characterized in somewhat more detail, since the latter in the region under study is often spatially associated with gold and forms mercury-antimony-polymetallic mineralization. 

The article presents the results of calculations of buildings for seismic effects, selected preschool educational institutions in Fergana, as well as some recommendations for their further safe operation.

In the article stressed about some features of Bukhara's applied art in the middle of the 18th - early 20th centuries. Art historians and historians have cited the scientific views of some scholars on the development of folk applied art in these periods.

The work describes the genetic types and conditions for the localization of mineralization - individual deposits and ore occurrences. Also, the indicated mineralized zones, the conditions of occurrence of the mineralization, the geological-structural position and the peculiarities of the host complexes. Descriptions of promising tungsten, tin ore, polymetallic, mercury and other ore zones, which serve as a reserve in expanding the resource base in the Republic, are given. Tungsten, tin ore, and mercury mineralizations are characterized in somewhat more detail, since the latter in the region under study is often spatially associated with gold and forms mercury-antimony-polymetallic mineralization.

Metal wooden spatial core structure, including upper and lower grids, braces, combining the nodes of the upper and lower grids, and vertical strands, characterized in that, in order to ensure redistribution of forces and uniform load of structural elements and giving additional stiffness compressive composite small-sized boards of the upper belt and the lower metal belt with a special tensile nut to give the building a structural lift, are displaced in plan relative to each other by 45 °, while the braces in the nodes of the grids are located mutually perpendicular and in one direction they are made descending, and in the other ascending, through one node.

This research paper discusses the provision of energy efficiency for air permeability of interfloor ceilings in the sections of nodal connections. Resistance to air permeability is the possibility of using the proposed method of device thermal liners, which accordingly increase the durability of the building.

Residual fiber in the fiber-separated seeds reduces the efficiency of fluff separation in linter machines, and the process of fluff separation is disrupted as a result of the clogging of the fibers into the saw teeth. Therefore, theoretical, practical research and creation of a device for separation of fibers from residual fluffy seeds before the lintering process is relevant.

Results of scientific substantiation and introduction of optimal nutritional norms,seedling thickness and water consumption in the production of fairy-tale, high- quality cotton crop of UzPITI-201 cotton cultivated in the technology of sowing seeds under the film, which is a key element of accelerated saving technologies in light gray soils of Andijan region listed.

Thanks to independence, attention is paid to restoring historical memory, perpetuating the memory of those who fought for independence, revealing historical justice associated with the fate of our country, revealing the recent black pages of our people and nation, drawing conclusions from this history.It is a duty and duty to perpetuate the memory of the innocent victims.       

In the article ways of perfection of processes of chisel, explosive and excavation-loading works, moving of career cargoes, a sailing of formation and application of is cyclic-line technology on deep open-cast mines with is difficult-structural conditions for the purpose of reduction of an ecological damage by environment are considered. The analysis of studying of experience of development of mountain works on is difficult-structural deposits fulfilled in the open way where depth of mountain works reaches a point more than 500 m with division into the natural -technological zones is carried out.

The chemistry of pyridine and its partially or completely hydrogenated analogues, used in various fields, is one of the fastest growing fields of interest for chemists and pharmacologists. Pyridine, pyridine, and tetrahydroisoquinoline rings are the major fragments of many natural and synthetic biologically active substances. Quaternary pyridinium salts are widely used as alkylating agents, interfacial migration catalysts, antiseptics, ionic liquids as surfactants and anticorrosives.

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4. Tolkunov V.S., Shishkin O.V., Zubatyuk R.I., Perepichka I.F., Dulenko V.I. Unusual Double 'O/N to N/O' Recyclization of 5-Alkyl-7,8-dimethoxy-2- aiylbenzo[d]pyrrolo[3,2-b]pyrylium Perchlorates into 5-Alkyl-7,8-dimethoxy-2- arylfuro[253-c]isoquinolines.//Synlett.-2005.-N°6.-P.1036-1038.


5. Achenbach, H., Hemrich, H., 1991. Constituents of tropical medicinal plants. Part 40.Alkaloids, flavonoids and phenylpropanoids of the West African plant Oxymitra velutina. Phytochemistry 30, 1265–1267.


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The article under discussion reveals the formation and development of inclined sections in bent reinforced concrete elements under the action of transverse forces. It is established that the strength of the bending element depends on the shape of destruction. Criterion of strength in a flat stress-strain state has been used to evaluate the work of the bending element.  

This article provides basic information on engineering selection and beautification of urban areas where 5-storey residential buildings should be built in response to emergencies in ways to increase the energy efficiency of buildings using atmospheric water for technical purposes.

This article presents the results of long-term stratigraphic studies on the territory of the Kuldzhuktau mountains. Schemes for the division and correlation of Devonian deposits have been created based on complete biostratigraphic data that most effectively reflect the geological age of local stratigraphic units and their reliable correlation with geological age. The tier units of the International Devonian Stratigraphic Scale are substantiated at the present stage of research.

Due to the widespread use of conodonts, it was possible to clarify the physical and age volumes, as well as the sequence of Devonian deposits in the territory of Kuldzhuktau, and almost completely reconstruct the Devonian section.

The article puts forward ideas in an intensive pilgrimage work, and now they support the use of ideas in education and enlightenment. They also covered the political activities of the jadids.

The development of methods and means to improve the efficiency of the mining facility is aimed at improving the efficiency of the use of raw materials concentrated in deposits of natural and man-made origin. This increase in efficiency is manifested through maximizing the content of commercial ore shipped for processing, creating prerequisites for increasing the shipment of commercial ore and increasing the productivity of the processing plant. Maximization of the content in commercial ore is based on the developed scheme of cyclical increase in the efficiency of resource potential use for the entire period of field development, supplemented by an improved method of current mining planning based on anisotropy of contents and dynamic conditions.

This work reflects the geological structure, history of development and ore content of the Zirabulak-Ziaetda and Kuldzhuktau ore-bearing complexes. The types of placement of structures are considered: focal-zonal, belt, nodal and frame-nodal. In the Zeravshan-Alai metallogenic belt, regularities have been established for the distribution of endogenous mineralization of ore regions and provinces. A metallogenic map was compiled using GIS technology using statistical analyzes to identify promising areas

The paper describes the economic importance of attracting financial resources from the national and international financial markets by joint stock companies operating in the Republic of Uzbekistan. The current situation with the attraction of capital from the international financial markets by companies in the financial sector has been analyzed and key conclusions have been drawn. In national practice, the existing shortcomings in the financing of companies on the basis of debt instruments have been studied and scientific proposals have been developed to address them.

In this article, the methods of construction of minarets of Khiva, architectural composition, building materials, history of construction, devices of aboveground and underground parts, which are of special importance in the ancient Khorezm architecture, are described in scientific sequence and in-depth analysis for the first time. Much of this information is being inserted into scientific circulation for the first time.

The article discusses the effective teaching of molecular physics, the study using modern pedagogical tools of the effective application of molecular physics in practice. The article will be useful for physicists, teachers and students.        

Lineaments were identified using LANDSAT-8 satellite images and digital elevation models obtained from the ASTER GDEM satellite over the Chatkal-Kuramin region. Taking into account the stock materials and a comprehensive analysis of the results of processing remote sensing data, a map of lineaments of a 1: 100,000 regmatic network was compiled. Based on the automated visual lineament analysis in the Geomatica PCI program, lineaments of the regmatic network were obtained, which are located in the focal zones of strong earthquakes.

The main ways to increase the durability of the working parts of the stamping tool are considered, including the processes of cold plastic deformation during the application of wear-resistant coatings by ion-plasma spraying. A physical model of the process of cold plastic deformation of samples from heat-resistant steel X12M is presented.