OAK jurnallaridan yig‘ilgan 140147 ta ilmiy maqola: sarlavha, mualliflar, annotatsiya, kalit so‘zlar, DOI va tayyor iqtibos formatlari.
The paper presents the results of an assessment of vertical profiles of wind velocity and water amount in the atmosphere over the Maidanak Astronomical Observatory. The height distributions of the meteorological…
With the aim of determination of electronic and geometrical structures of mixed-ligand complexes, theoretical modeling of the structures of coordination compounds of transition metals with dialkyldithiophosphate…
By the interaction of propargyl esters of carbamate derivatives with phenylazide, 1,2,3- triazole derivatives were synthesized. Their anti-inflammatory activity was subsequently studied.During the study of biological…
In order to further modify inulin with drugs, the process of introducing reactive aldehyde groups into the inulin macromolecule was carried out. Aldehyde groups were introduced by oxidizing inulin with iodic acid. The…
The purpose of this research is to study the possibilities of modeling oil-water emulsion in the laboratory. The study of the ratio of components and conditions of dispersion (formation) of oil-water emulsions on their…
The aim of the research work elaboration of technology of obtaine of acetylene diols and their vinyl ethers. Reaction of formation mono di vinyl ethers as a result vinyl 3,6-dimetyloktin-4-diol-3,6 by acetylene, and…
The paper analyzes the available resources for the creation of a cluster approach to the integration of education, science and industry in order to create a mechanism to bring the development of the economy to the level…
The oxadiazole derivatives complex compounds with metals are biologically active substances. The aim of the study was to study the interaction of the chlorides of Co (II), Ni (II), Cu (II) and Mn (II) with…
The aim of the study was to study the conditions of copolycondensation of phenol alcohol with hydroxyl-containing polyether polyol in the presence of maleic anhydride chain extender in order to obtain modified thermoset…
The process of formation of supramolecular complexes of glycyrrhizinic acid with some phytohormones (indolylacetic acid, indolylbutyric acid, α-naphthyl acetic acid and kinetin) were studied with the aim of creation the…
Considering the protein need for human nutrition, the use of protein-rich grains plays an important role in the production of pasta. The study used soy protein as one of the protein sources, which serves as an effective…
The synthesis of mixed ligand coordination compounds of copper, cobalt and nickel formates with formamide and urea in an aqueous solution was carried out. The metal content in the complexes was determined by…
The aim of the research was to determine the properties of loess clay in Kattabog deposit (Uzbekistan) to identify possible areas of use. Modern methods of physicochemical analysis are used: spectroscopic, x-ray phase…
The aim of the research is to determine the effect of alumina on the phase composition of shale of the Jerdanak deposit and the quartz-pyrophyllite rock of the Baynaksay deposit during high-temperature firing. X-ray…
The effect of hydrothermal treatment on the strength of the wheat grain shell before the first torn process is investigated. It was found that the anatomical parts of wheat grains grown in arid climatic conditions are…
The aim of the research was to study the effect of temperature, the ratio of P2O5EPA:P2O5PRM and the duration of calcination on the content of various forms of P2O5 in calcium polyphosphate. The effect of calcination…
The aim of the study was the theoretical justification of the kinetic characteristics of the process of producing zinc chloride from zinc concentrate of the Khandiza deposit. For this, the effect of temperature and…
The advantages of synthesis of complex oxide compounds by solar energy, the possibility of obtaining highly textured nano materials are shown. The development of heliomaterial science, aimed at the synthesis of new…
The emission of cluster ions of stoichiometric composition AnBm + (n+m≤12) has been studied under ion bombardment of boundary between two different mechanically joined metals A and B. It has been shown that along with…
The root-mean-square displacement of atoms in the new cubic refractory alloy Ti070Mo030C has been determined by the methods of least squares and full-profile analysis based on neutron diffraction data. The values of the…
The article presents the results of studying the complexity of the Raman spectra of -alanine in the crystalline state. It has been shown by ab initio calculations that the change in the Raman spectra is explained by…
The polyfunctional hemosorbent "Gemosorb" and pure sericin were obtained from substandard cocoons "Bombyx mori", natural silk threads and their fibrous wastes. Fat-wax and inorganic impurities from the feedstock have…
Organik reagentlar bilan modifikatsiyalangan elektrokimyoviy sensorlar yordamida In va Cd ionlarini inversion voltamperometrik aniqlash usuli ishlab chiqilgan, hamda bufer aralashmalar va fon elektrolitlarning optimal…
Ushbu maqolada O’rta Zarafshon tog’lardagi g’orlarni muhofaza qilish va turizmni rivojlantirishda g’orlarning ahamiyati va ularning jozibadorligini yoritib berilgan
Ushbu maqolada ko‘z tubi qon tomir tasviridan morfologik noravshan amallar yordamida qon tomir tasviri ajratib olindi. Hosil bo‘lgan grafik ob’ektlarga nisbatan matematik modellari ishlab chiqilgan. Ushbu matematik…
Maqolaning asosiy maqsadi zich qoʻshaloq kompakt gravitatsion obektlar atrofidagi elektromagnit jarayonlarni, sinov zarralar harakatini qarab chiqishdan iborat. Chunki kosmik obyektlar odatda qoʻshaloq tizimlar xosil…
Ushbu ishda Samarqand viloyati, Nurobod tumani Uyrug‘ul, Mehnatkash va Sarikul qishloqlaridan olingan buloq suvlari tarkibidagi radonning solishtirma aktivligi NaI(Tl) – kristalli ssintillyatsion gamma-spektrometrik…
Ishda yengil uglevodorod (C1–C4) larning konversiyasi uchun cho’ktirish, “zol–gel” usullaridan foydalanib, katalizatorlar sintezi amalga oshirilgan. Sintez jarayonida qo’zg’almas faza sifatida mahalliy xom–ashyo…
We consider a wide class of Schrödinger operators HV = H0 V describing a particle in an external force field vˆ in the d -dimensional cubic integer lattice d , d 3 . We study the existence or absence of bound states…
Образование димерных агрегатов в жидком пирроле, возможно путем взаимодействия водорода группы N-H одной молекулы с -электронами пиррольного кольца другой молекулы. При этом в таком агрегате одна связь N-H оказывается…
В статье показана условии и возможность амперометрического титрования ионов благородных металлов с растворами 4-метоксифенилкарбоксиметил-диэтилдитиокарбамата (МФКМДЭТК) и…
Предлагаемая статья относится к органическому химическому синтезу и исследованию N,N1-тетраметилен-{[1,3,11,31-тетра-[β-фенил-азо-α,α1-нафтокси)]-2,21-бис- (глицеринило-карбамат)]} и его химических свойств. В…
Ushbu ishda kraxmal va tetraetoksisilan asosida polimer kompozitlar sintezi va xususiyatlari tadqiq qilingan. Olingan maxsulot tarkibi IK-spektroskopiya, skanerlovchi elektron mikroskopiya, element tahlili usullarida…
В работе рассмотрен оператор Шредингера, соответствующий системе на одномерной решетке. Найдены собственные значения и собственные векторы этого оператора.
Впервые систематически изучены множественные (двойственные) реакционные способности полидентных анионов 2-оксо-, -тиоксо-, -селеноксо-, -амино-, - ацетиламино-6-метилпиримидин-4-онов в реакциях алкилирования. Выявлено…
Поставлена и численно решена задача переноса вещества в двумерной неоднородной пористой среде. Скорость фильтрации и гидродинамическая дисперсия задавались различными соотношениями, нелинейными и синусоидальными. На…
Tadqiqot ishining asosiy maqsadi AAO qo‘llanilishini metall nanostrukturalarini shakllantirishda membrana sifatida tavsiflash va ushbu sohada ilmiy tadqiqotchilar tomonidan olingan tajriba natijalarini taqdim etishdir…
Выполнены измерения радиоактивности дозообразующих радионуклидов радия Rа-226, тория Тh-232 и калия К-40 в пробах строительных материалов и изделий, сделанные с различной временной выдержкой проб. Определены эффективные…
Ushbu ish zol-gel usulida tayyorlanadigan qattiq materialga dopant sifatida FeCl3 biriktirish va uning spektral xossalarini aniqlashga bagʻishlangan. Biriktirilgan dopantning spektral xossalari noorganik zol-gel…
Изучена закономерность химического иницирования суспензионной полимеризации метакрилового эфира этинилциклогексанола в присутствии диспергатора метилцеллозы. Показано равномерное снижение значения относительной скорости…
Mazkur maqolada landshaftlarni, jumladan, delta landshaftlarining tabaqalanishi hamda strukturasini o‘rganishda relef plastikasi metodidan foydalanish va uning afzallik tomonlari bayon qilingan.
In this paper it is considered some singular surfaces in given by parametric equations. It is proved that at least one of the principal curvatures does not vanish at each regular point of these surfaces
O‘zbekiston sharoitida o‘sadigan Evropa tuyoq o‘t o‘simligi turli qismlari tarkibidagi biologik faol moddalar ekstraksiya qilib, ajratib olindi va uning tarkibini spektrofotometrik usulda tahlil qilindi. Olingan…
Показана перспективность использования местного плодово-ягодного сырья для производства продуктов потребления. Определен химический исходного сырья. Предложены методы получения сока из шелковицы, гранатового и эфирного…
Maqolada elementar oltingugurtdan modifikatsiyalangan oltingugurtli beton olish va uning tarkibini elektron mikroskop hamda rentgenofazaviy tahlil yordamida atroflicha o’rganilgan. Olingan natijalar jadval shaklida qum…
Решается задача поиска максимальной совместной подсистемы систем булевых уравнений. Предлагается алгоритм нахождения максимального верхнего нуля монотонной булевой функции. Исследуется и разрабатывается эффективная…
Ushbu maqolada 2017-2018 yillarda Maydanak observatoriyasida kuzatilgan SBS1520+530 va SDSS2124+1632 gravitatsion linzalangank va zarlarning fizik parametrlari oʻrganilgan, yorqinlik egri chiziqlari chizilgan hamda…
Zol-gel texnologiyasi asosida kislotali muhitda turli haroratlarda tetraetoksisilan va ayrim metall oksidlaridan sorbent namunalari olindi. Olingan sorbentlarda benzol bug‘i adsorbsiyasi orqali solishtirma sirt yuzasi…
Ushbu maqolada qo’lyozma matnlarni tanib olishda kompyuter ish faoliyati jarayonini kamaytirish maqsadida qator segmentatsiyalaridan foydalaniladi. Segmentatsiyalanmaydigan tanib olish neyron modellari uchun qator…
When real problems are translated into mathematical language, many of them can be expressed as nonlinear equations. Then the study of these problems is reduced to the solution of equations or the study of their…