Actual problems of Mathematics, Physics and Mecanics
Actual problems in modern technical sciences
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Actual problems of Natural Sciences
STUDY OF THE STRUCTURE OF THE NITRIDED LAYER FOR THE STRENGTH OF THE ADHESIVE BOND OF WEAR-RESISTANT COATING IN R9M4 STEEL
The study is aimed at assessing the effect of the structure of the nitrided layer on the adhesive bond strength of the coating TiAlN with a high- peed steel base. The method of ion nitriding in a gas plasma of a two-stage vacuum arc discharge allows you to control the structure of the layer by...
3 March 2024, 21:50
SYNTHESIS OF ACETYLENIC DIOLS BASED ON THE REACTION OF TERMINAL ACETYLENIC ALCOHOLS WITH ALIPHATIC KETONES
In this work, the synthesis of highly biologically active acetylene diols was studied for the first time based on the reaction of the nucleophilic coupling of terminal acetylene alcohols with aliphatic, alicyclic, aromatic and heterocyclic substituents in their molecule with acetone, methyl butyl...
3 March 2024, 21:50
ISSUES OF RESEARCH AND MAPPING OF TOURIST RESOURCES OF THE REGION USING GIS
In this article, the geographical basis of determining the level of development of tourist resources and tourism infrastructure, scientific and practical proposals and recommendations for their improvement, the rational use of tourist and recreational resources, the development of many types of...
3 February 2024, 21:50
BIOETHICS AS AN EDUCATIONAL DISCIPLINE, ITS CONTENT, PURPOSE AND TASKS
In this article, the humanistic and philosophical analysis of bioethics in modern medicine is covered. Bioethics, as a different field from classical medical ethics, appeared and began to develop rapidly. Bioethics is a new worldview, a new science of humanity and compassion....
3 January 2024, 21:50
POSSIBILITIES OF RAINFED HORTICULTURE DEVELOPING IN THE ADYR AREAS OF NAMANGAN REGION
In this article, the results of the experiment conducted in 2020 on the comprehensive development of rainfed horticulture in the adyr areas of Uychi district of Namangan region. Experiments were carried out on the basis of agrotechnology of plastic mulching using polyethylene film. Experiments were...
3 January 2024, 21:50
EXTRACTION OF SERICIN FROM SILK FIBER WASTE UNDER THE INFLUENCE OF MICROWAVES AND ULTRASOUND IN A WATER ENVIRONMENT
Currently, scientists have used several methods of extracting sericin contained in silk fiber. For example, the traditional thermal method, ultrasonic and microwave (ultra-high frequency - UHF rays) methods. When these methods are compared, the effectiveness of the microwave method is proven....
3 January 2024, 21:50
VOLUMETRIC SWELLING PROPERTIES OF SILK FIBROIN FIBER IN WATER, ACIDIC AND ALKALINE SOLUTIONS
Silk fibroin (SF) is an excellent raw material for making many useful materials. Fibroin materials can be used in various environments. For this reason, it is very important to know the information about the amount of fibroin swelling in which solution medium and its swelling speed. Therefore, we...
3 January 2024, 21:50
INCREASING THE ACTIVITY OF β-GLUCOSIDASE ENZYME USED IN INDIGO OBTAINING FROM INDIGOFERA TINCTORIA L
Indigo dye is one of the dyes that has been used since ancient times and has maintained its importance to this day. Currently, indigo is obtained synthetically and from natural sources. Synthesis of indigo uses non-renewable resources, hurting the environment. This encourages research to improve...
3 January 2024, 21:50
SYNTHESIS AND STRUCTURE OF HETEROMETALLIC POLYNUCLEAR COORDINATION COMPOUND BASED ON COPPER (II) FORMAT AND MANGANESE (II) METACHRESOXYACETATE
This article presents the method of synthesizing a heterometallic polynuclear coordination compound based on copper (II) formate and manganese (II) methacresoxyacetate and the results of X-ray phase analysis in order to determine its structure. The results obtained from the X-ray phase analysis...
3 January 2024, 21:50
CHECKLIST OF INSECT PESTS OF ONION OF THE NORTH-WESTERN REGION OF UZBEKISTAN
This article provides a checklist of onion pest insects. There are 8 order, 28 families, and 62 species belonging to 48 genera. The species belonging to the Noctuidae family (11 genera and 14 species) were recorded the most common and following families also are recorded Chrysomelidae,...
3 January 2024, 21:50