Actual problems of Mathematics, Physics and Mecanics
Actual problems in modern technical sciences
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Actual problems of Natural Sciences
CLIMATE DYNAMICS OF THE MIRZACHUL REGION: A KÖPPEN–GEIGER CLASSIFICATION ANALYSIS (1901–1930 VS. 2070–2090)
The Mirzachul region in central Uzbekistan, historically known as the “Hungry Steppe,” represents one of the largest irrigated agricultural landscapes in Central Asia and is highly sensitive to climate change. This study applies the Köppen–Geiger classification to compare the historical climate...
3 September 2025, 21:50
MATERIALS ON THE FAUNA OF SHIELD BUGS (PENTATOMIDAE) OF CENTRAL–EASTERN RESERVES OF THE REPUBLIC OF UZBEKISTAN
This article presents information on Pentatomidae species found in the reserves of Central-Eastern Uzbekistan in the first decade of June 2025....
3 September 2025, 21:50
STRUCTURE AND CHEMICAL PROPERTIES OF PETROLEUM POLYMER RESINS DERIVED FROM SECONDARY PRODUCTS OF THE PYROLYSIS PROCESS
In this study, petroleum polymer resins (TAR) were obtained from the secondary products of the pyrolysis process using a partially oxidative pyrolysis method. The chemical composition and structural properties of the resins were thoroughly investigated. The pyrolysis was conducted at temperatures...
3 September 2025, 21:50
STUDY OF THE SOLUBILITY SYSTEMS OF MONOETHANOLAMMONIUM OXALATE WITH UREA AND ACETAMIPRID IN AQUEOUS SOLUTIONS
Today, the daily increase in the number of the population causes an increase in the demand for agricultural products not only in Uzbekistan, but also in the whole world. Protection of food crops from the effects of various insects and increasing productivity is one of the important tasks of...
3 August 2025, 21:50
THE IMPORTANCE OF BIOTECHNOLOGY IN THE CULTIVATION OF SAFFRON (CROCUS SATIVUS L.)
In this scientific article, the effect of biological fertilization on the formation of buds and leaves, the length of leaves, the number of fibrous roots, the length and weight of roots of saffron are studied. Based on the obtained results, it was determined that the amount of zoohumus at a...
3 August 2025, 21:50
SYNTHESIS OF COMPLEX COMPOUNDS OF MANGANESE (II) ION WITH INDOMETHACIN AND AMIDES AND THEIR ANALYSIS USING IR SPECTROSCOPY
In this study, the synthesis of mixed-ligand coordination compounds of manganese (II) ion with indomethacin ligand and amides (formamide, acetamide, nicotinamide), as well as their physicochemical properties, was investigated. The complexes were obtained in solution by reacting manganese (II)...
3 August 2025, 21:50
SYNTHESIS, STRUCTURE AND ANTIBACTERIAL ACTIVITY OF Zn(II) ION COMPLEX WITH DICLOFENAC AND ETHYLENEDIAMINE
Mixed-ligand complex compounds of diclofenac with Zn+2 metal cation and ethylene diamine were synthesized, its molecular crystal structure was determined by X-ray diffraction analysis (XRD), IR spectroscopy, and stability by TG-DSC. Based on the RSA results, it was established that the general...
3 August 2025, 21:50
THERMAL AND CHEMICAL PROPERTIES OF LIMESTONE FROM THE “UCH O‘JAQ” DEPOSIT
This article examines the thermal and chemical properties of limestone from the “Uch o‘jaq” deposit. During the study, the samples were analyzed using thermographic, X-ray phase, and chemical methods. The results showed that the limestone from this deposit is rich in calcite and also contains...
3 August 2025, 21:50
THE IMPACT OF ATTAGENUS SMIRNOVI ON CULTURAL AND DOMESTIC ASSETS: CHALLENGES AND SOLUTIONS
The study examines the destructive effects of Attagenus smirnovi (the brown carpet beetle) on both cultural heritage sites and household assets. Special attention is given to historical monuments and museum collections, where the beetle causes significant damage to organic materials such as wool,...
3 July 2025, 21:50
SYNTHESIS AND STUDY OF THE COORDINATION COMPOUND OF ZINC NITRATE WITH KETOROLAC
This article presents the synthesis and physicochemical characterization of a novel coordination compound formed from zinc nitrate and ketorolac. The compound [Zn(ket)2](NO3)2·2H2O was synthesized in a water–ethanol mixture under pH conditions of 5.5–6 and precipitated as white crystals....
3 July 2025, 21:50