STUDY OF THE THERMOGRAVIMETRIC PROPERTIES OF THE SCHIFF BASE BASED ON CHITOSAN APIS MELLIFERA WITH GLUTARALDEHYDE
This paper presents the results of studies on the thermogravimetric properties of chitosan and its Schiff bases. The authors investigated the structure of the Schiff base (Xz-G) using molecular modeling in the HyperChem 8.0 program. The observed thermal phenomena provide insight into the stability...

Actual problems of Natural Sciences / 2025 / March

Ulashov Sherbek Mukhiddin Ugli, Ikhtiyarova Gulnora Akmalovna, Akhmedova Sabina Mansur Kizi

Volume 9 | Issue 3

3 March 2025, 21:50

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ANALYSIS OF IDENTIFICATION METHODS OF NON-METALLIC INCLUSIONS IN STEEL GRADE 110G13L
The article discusses methods for identifying non-metallic inclusions in 110G13L steel. Particular attention is paid to the electrolytic extraction method, which allows the identification of oxides, sulfides, and nitrides. Various methods for analyzing inclusions are considered, including...

Actual problems in modern technical sciences / 2025 / March

Ashurov Khisrav Khurshid Ugli, Khamroev Nurbek Nurilloevich, Yakhshiev Sherali Namozovich, Tangatarova Laylo Alijon Kizi

Volume 9 | Issue 3

3 March 2025, 21:50

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MICROSTRUCTURAL PROPERTIES OF COPPER-GRAPHITE COMPOSITES PREPARED BY COLD PRESSING METHOD
This study investigates the fabrication and characterization of coppergraphite (CuGr) composites with varying graphite content (10, 20, and 30 wt.%) for potential applications in electrical contacts, such as pantograph sliders for high-speed trains. The composites were prepared using mechanical...

Actual problems in modern technical sciences / 2025 / March

Sultanov Sulaymon Safarboy Ugli, Ismoilov Rakhmatjon Ilkhom Ugli, Mirzayev Otabek Taxir Ugli, Kadirov Islom Reyimbergan Ugli, Shakirov Shukhrat Musaevich, Allabergenov Bunyod Farkhodovich

Volume 9 | Issue 3

3 March 2025, 21:50

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DISTRIBUTION OF RESIDUAL POROSITY BY HEIGHT IN VARIOUS SCHEMES OF PRESSING BUSHINGS FROM POWDERS
This study investigates the influence of pressing schemes on the distribution of residual porosity in powder metallurgy products, focusing on onesided and two-sided cold pressing methods. Using analytical modeling, the distribution of porosity along the height of a bushing-shaped compact is...

Actual problems in modern technical sciences / 2025 / March

Shakirov Shukhrat Musaevich, Karimov Shoir Akhrarovich

Volume 9 | Issue 3

3 March 2025, 21:50

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DEVELOPMENT AND CURRENT STATE OF THE PASSENGER TRANSPORT SYSTEM IN RAIL TRANSPORT
The study of the organization of passenger transport rail transport in the state currently consists of identifying a number of important aspects that affect the quality of service provided. The development of e-commerce in the field of rail transport and the use of modern e-commerce technologies...

Actual problems in modern technical sciences / 2025 / March

Ibragimova Gulshan Ruslanovna, Mirzabekova Umida Nishanbayevna, Kulahmetov Oybek Pochchahonovich

Volume 9 | Issue 3

3 March 2025, 21:50

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PROSPECTS FOR MANUFACTURING MODERN STRUCTURAL MATERIALS BASED ON IRON POWDER
This article analyzes modern technologies used in obtaining structural materials based on iron powder with high physical-mechanical and operational properties. It examines raw powder materials, practical and scientific results achieved in the field, and existing challenges in this area....

Actual problems in modern technical sciences / 2025 / March

Shakirov Shukhrat Musaevich

Volume 9 | Issue 3

3 March 2025, 21:50

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DEVELOPMENT AND IMPLEMENTATION OF A SPECIAL DISC MODULAR CUTTER FOR SHAPING THREADS TO TRAPEZOIDAL PROFILES ON INTERNAL SURFACES
The article examines the development and implementation of a special disc cutter for shaping threads on trapezoidal profiles in holes of complexconfiguration housing parts made of structural steels and cast iron under the conditions of the “GIDRO STANKO SERVIS” LLC production base....

Actual problems in modern technical sciences / 2025 / March

Mardonov Bakhtiyor Teshayevich, Shakulov Begmamat Kurbanovich, Fayziyev Oybek Sidikovich, Tangatarova Laylo Alijon Kizi, Qarshiboyev Sunnatillo Rustambekovich

Volume 9 | Issue 3

3 March 2025, 21:50

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INFLUENCE OF POWDER PRESSING SCHEME ON THE STRESS-STRAIN STATE OF BUSHING-TYPE PRESS BRIQUETTE
This study investigates the compaction of iron-based powders to produce high-density components with enhanced mechanical properties. A mathematical model analyzes stress distribution, porosity, and deformation under different pressing schemes, considering the influence of external friction. The...

Actual problems in modern technical sciences / 2025 / March

Shakirov Shukhrat Musaevich

Volume 9 | Issue 3

3 March 2025, 21:50

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PIANO MUSIC BY COMPOSER NADIM NORKHODJAYEV: PERFORMANCE INTERPRETATION
This article describes the practical and theoretical principles of composer Nadim Norkhodjayev’s piano performance. This composer’s style, which was formed under the influence of Eastern music, is distinguished by the brightness and elegance of musical and visual tools, the novelty of harmony and...

Actual problems in modern art and architecture / 2024 / March

Sadikova Zukhra Sotvoldiyevna

Volume 8 | Issue 3

3 March 2024, 21:50

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DEVELOPMENT OF JAZZ PIANO PERFORMANCE IN UZBEKISTAN
Due to the wide range of opportunities that are now mainly given to young people, the ability to show talent has not been considered so difficult. Supporting young people, giving them ample opportunities to show themselves, is now one of the main tasks in the art world. At the same time, there are...

Actual problems in modern art and architecture / 2024 / March

Sadikova Zukhra Sotvoldiyevna

Volume 8 | Issue 3

3 March 2024, 21:50

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