OAK jurnallaridan yig‘ilgan 140147 ta ilmiy maqola: sarlavha, mualliflar, annotatsiya, kalit so‘zlar, DOI va tayyor iqtibos formatlari.
Ushbu maqolada o’zbek adabiyotining yorqin yulduzlaridan biri bo’lgan, taniqli satirik, muxammas va murabba janrlarida ijod olib borgan Muhammad Aminxo’ja Muqumiy ijodi va uning adabiy tahlili olib borilgan. Shuningdek…
This article explores the degrees of adjectives in English and Russian languages. Both languages utilize three degrees of comparison for adjectives: positive, comparative, and superlative. However, there are notable…
В данной статье рассматривается роль современных телекоммуникационных услуг в развитии экономики и общества Узбекистана. Проанализированы перспективы развития сетей связи страны, включая развитие мобильной связи…
Quyidagi ilmiy maqolada Abdulla Qahhorning hayoti va ijodi, uning qissalarida badiiy obraz tushunchasi ilmiy tahlil etilgan.
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…
The article synthesizes new monomers based on citric acid – acrylamido-N-methylene citric acid (AA-N-MLK) and acrylamido-N-citric acid (AA-N-LC). The structure of the obtained monomers was identified using various…
Determination of strontium-90 content in soil samples by performing calculations through its daughter radionuclide yttrium-90 is the most accurate method, but also requires a lot of time for analysis. A technique is…
In this work, Al3+- modified LiAlxMn(2-x)O4 was synthesized by the sol-gel method with the partial replacement of manganese in the spinel LiMn2O4 oxide phase with Al3+. The characteristics of LiAlxMn(2-x)O4 (0 ≤ x ≤…
This article describes the optimal conditions for the growth of microalgae and the composition of nutrient media. Microalgae, as their name suggests, have unicellular and multicellular microscopic states and have…
Based on waste from the production of thiourea, new products with ion-exchange properties were obtained. It has been established that when melamine-containing waste is mixed with urea-formaldehyde resin and heat…
1-(2-piridilazo)-2-naftol bilan rux, kadmiy va qo'rg'oshinning kompleks birikmalari sintez qilindi va tadqiq qilindi. Olingan kompleks birikmalarning tarkibi va tuzilishi ICP-OES, rentgen-fluoresent tahlili, energo…
We know that today the processing of industrial waste and turning it into finished products is one of the most important tasks. The article notes the treatment of liquid waste from the Kungrad soda plant using…
The article provides information about navigational system GPS and GLONASS applicable when making the state geodetic supporting network. The Requirements to receiver companion (satellite) for performing on making the…
Maqolada distansion usul orqali yerning tuzilishi va geodinamikasi o‘rganiladi. Geofizik usullar yordamida xalqasimon tuzilmalarning xaritalari tuzilib ularni zilzila o‘choqlari xaritasi xamda geofizik maydonlar bilan…
The article examines the formation, settlement and factors affecting human settlements. It is argued that in the socio-economic development of settlements, its geographical location, horizontal and vertical location is…
The republic is implementing comprehensive measures to actively develop the digital economy, as well as the widespread introduction of modern information and communication technologies in all sectors and spheres…
In this article, what factors influence the nosogeographical situation of Tashkent region and their analysis is presented. Some aspects of population morbidity indicators of the region are highlighted. The state of…
Industrial development not only leads to economic growth of the country, but also affects the geo-ecological situation. Based on this point of view, it should be studied and assessed in order to identify natural and…
In the article, the role of the relief structure in the stratification of the natural components of the current Amudarya delta was evaluated for the first time. On the basis of our research, the systematic…
The article examines the problems of efficient use of land resources of the catchment basins in the irrigated areas of the current Amudarya delta. In the current delta of the Amudarya, there are several catchment…