| Nashriyot | Ўзбекистон Миллий университети |
|---|---|
| Shahar | Toshkent |
| ISSN | 2181-7324 |
| e-ISSN | 3093-8996 |
| Tashkil etilgan | 2024 |
| Nashr tillari | Ingliz, Rus |
| Maqolalar soni | 1328 |
| OAK holati | Ro‘yxatda |
This paper will analyze the historical significance of Ban Chao's governance of the Western Regions, including its impact on the exploration, rule, and cultural exchanges in the Western Regions.
In this article, you will get acquainted with the activities of scientific research institutes specializing in natural and agricultural sciences that operated in the system of the Academy of Sciences of Uzbekistan…
The article talks about Uzbek archeology, the stages of its formation, and at the next stages the archaeological monuments of the Stone Age of the Fergana Valley and their study are analyzed.
The idea of interreligious tolerance implies the cooperation of not only religious people, but also all members of society in the path of goodness and is an important condition for peace and stability. Since time…
The article analyzes the types of crafts that were an integral part of the lifestyle of the inhabitants of the Bukhara Khanate in the 17th and first half of the 18th centuries, their role and significance in people's…
In this work, methods of synthesis of one-dimensional filamentary crystalline nanowhiskers in the volume of evaporating drop of a C70 molecular solution on the surface of a horizontal glass substrate and methods for…
The anisotropy of the efficiency of Bragg diffraction of light by longitudinal acoustic waves propagating along the [100] and [001] directions in pure and neodymium-doped lead molybdate crystals has been studied. The Nd…
The paper presents the results of studies of the distribution profiles of implanted iron atoms in silicon depending on the irradiation dose and annealing temperature by the RBS method. The obtained results confirm…
The paper presents studies of a class of such potentials for which the motion of a star admits some local integrals of motion. It is shown that linear or quadratic integrals in terms of velocity components, independent…
To prevent energy shortages on Earth, it will be necessary to develop renewable energy sources. At the same time, the drying method available in farms, the quality level of the product is not desirable. Experiments on…
In this work, nanocrystalline phases and layers of NiSi2 were obtained by implantation of Ni + ions in Si in combination with annealing in the near-surface Si layer at a depth of 15-25 nm. At D = 8 ∙ 1016 cm-3, a…
Organic solar cells (OSCs) are a type of alternative energy, and extensive research is underway in this field to address the global energy crisis. OSCs are considered superior to traditional silicon-based inorganic…
In this work, a magneto-optical spectrometer based on light modulation created by a photoelastic modulator of an original design was designed and created. The system was tested by measuring the degree of MCPL in…
The occurrence of lopsided structures in self-gravitating disk-like systems was studied by means of a pulsating non-stationary disk-like model. Azimuthal wave number m=1, radial wave number N=7 for oscillation…
The paper reports results of the study of the distribution profiles of implanted iron and cobalt atoms in silicon as a function of the radiation dose and annealing temperature that was performed by applying the…
In this paper it is shown that the introduction of nickel atoms in the process of silicon crystal growth allows to obtain a material with stable electro physical parameters in the process of thermal annealing in a wide…
Remote observations of the W Ursa Major type eclipsing variable star ZTF-J235103.06+615610.6 were carried out using the AMT-1 automated telescope of the Maidanak Astronomical Observatory. 19 new times of minima were…
We presents the results of a photometric research of the four-component of the gravitational lensed quasar GRAL J024848.7+191331, which was observed at the Maidanak Observatory in 2021-2022. The light curves of the…
In this article, at a temperature above 700 K, the specific resistance ρ and thermoEMF coefficient S of Alloyed silicate glass (LSG) increase sharply, reach a maximum, and then decrease. It was assumed that such changes…
Isotherms of adsorption of heptane molecules at 303 K on hybrid bionanocomposite diacetatecellulose-silica (DAC-silica) have been investigated. Isotherm of adsorption can be described by three-member equation of theory…
This article highlights the research results on the synthesize of a new heterometallic complex compound of cobalt(II) acetate and succinic acid with the sodium salt and the determination of their composition, structure…
The article presents the results of studies of the properties of baking protein amaranth flour. Humidity, acidity, gas producing and gas-retaining ability were studied. Flour samples, presented at the St. Petersburg…
v The article presents data on the development of technology for defluoridation and desulfation of extraction phosphoric acid from phosphorites of the Central Kyzylkum region with sodium salts. The rheological…
In the work, by chemical modification of the local "Nitron" fiber, a fibrous ionite with polyampholyte properties was obtained. Its structure was determined by analyzing its IR spectra. The kinetics of static sorption…
In this paper, it was found experimentally that the cadmium particles of nanocomposites are almost evenly distributed in the metalpolymer composition by volume.
Currently, scientific research is underway around the world on the synthesis of catalysts with high strength, low hydraulic resistance and specific surface area. In this regard, special attention is paid to the creation…
Thermal analysis of the catalysts obtained for the pyrolysis process of methyl chloride was carried out in the Q-1500D derivatograph. The pore structure of the samples was studied using the low-temperature nitrogen…
This article discusses the influence of some adsorbents on the process of hydrogenation of cottonseed oil. To prevent poisoning of nickel catalysts, it is recommended to introduce natural sorbents obtained from local…
In this article, the sorption of nitrogen on amphiphilic silica was studied at low temperatures. The adsorption isotherm was considered within the framework of the BET model and, on its basis, the parameters of the…
An adduct based on carbamide and amphos based on local raw materials was obtained, its physico-chemical properties were studied.
Synthesis of the corresponding ketones by oxidation of acetylene alcohols containing halogen substituents. The object of study was acetylene alcohols containing halogen substituents, including…
Relevance: The significance of the problem lies in the fact that oncogenesis, like any pathogenetic process, is formed due to the activity of systemic genes in the gene network. Oncogenes and suppressor genes play the…
The chromatographic retention of some flavonoid derivatives was studied under reverse-phase HPLC conditions. Retention factors were determined for different eluent compositions (CH3OH, phosphate buffer). The…
In this article, the intensive flow of water and collector-drainage water in reservoirs located in the upper Syrdarya river formed the man-made object Aydarkul-Tuzkon-Arnasoy in the Mirzachul region, but the chemical…
In this work, polyampholyte was synthesized based on fibrous polyacrylonitrile, which contained nitrogen and phosphorus. Kinetic models of absorption of Cu2+ ions from artificial solutions onto a new fibrous sorbent…
Доломит уни парчаланиш даражасига турли параметрларнинг (сулфат кислотаси меъёри, ҳарорат ва аралаштириш давомийлиги) таъсири ўрганилди. Кўрсатдики, кислота меъёри, жараён ҳарорати ва аралаштириш вақти қанча юқори…
v The results of studying the rheological properties, as well as settling and filtration of decomposition products (pulp and liquid phase) of dolomite from the Dekhkanabad deposit with sulfuric acid are presented. It…
The purpose of the study is to develop an energy-saving technology for producing feed monocalcium phosphate by simultaneous concentration and deep defluoridation of extraction phosphoric acid in the presence of…
In this article, the electrochemical properties of the reagent 2,4-dinitrose-1-hydroxy-5-aminonaphthalene-6,8-disulfonic acid were studied by cyclic voltammetry and chronoamperometry, and an electrochemical method for…
This work presents an analysis of the IR and EPR spectra of Cu(II) complex compounds based on acylhydrazones 1-2-(thenoyl)-3,3,3-acetone.
In this research work, first of all, brief information about adsorption isotherms in distilled water is given. Data on the results of correlation coefficients of Langmuir and Freundlich adsorption isotherms for Ca2+ and…
In this state, glycyrrhizic acid and its products are present in several different ratios of gallic acid, i.e. 1:2; 1:4; Information is provided on methods for obtaining new supramolecular compounds obtained in a molar…
In this article, the determination of the degree of deacetylation of chitosan biopolymer isolated from Leptinotarsa decemlinaeata by potentiometric titration and elemental analysis method is discussed and the obtained…
In the research work, types of tea were analyzed, their chemical composition was studied, and classification criteria according to TIF TN were developed and recommended for customs practice. It was established that the…
Information is provided on nitric acid processing of phosphorite enrichment waste from the Central Kyzylkum region into liquid nitrogen-calcium fertilizers and fertilizer precipitate in one technological cycle and…
The article presents a new method for the synthesis of the nicotinamide complex compound of cobalt (II) formate, as well as the results of studying the structure of the complex. The compound consists of neutral…
In this study, inulin derivatives containing acidic -COOH groups in their structure were synthesized. To obtain inulin derivatives, the polysaccharide was initially halogenated using thionyl chloride. Samples with…
Complex compounds of uranyl ion with 2-amino-1-methylbenzimidazole (MAB) and diethyldithiocarbamate (DEDTK) were synthesized and studied. The composition and structure of the resulting complex compounds were established…
This article analyzes the preparation of aqueous emulsions from nonstoichiometric interpolymer complexes (NIPCS) based on urea-formaldehyde oligomers (CFO) and the sodium salt of carboxymethylcellulose (Na-CMC) and the…
The article discusses specific aspects, methodological approaches, content and significance of the principles of “Green Chemistry” in a new educational course Сhemical ecology, developed for the field of chemistry of…