OAK jurnallaridan yig‘ilgan 104809 ta ilmiy maqola: sarlavha, mualliflar, annotatsiya, kalit so‘zlar, DOI va tayyor iqtibos formatlari.
In the experiments of Fourier IR spectrometry we studied the swelling mode of the Nafion polymer membrane in water poured into cuvette, the characteristic size of which is on the order of the membrane thickness. The…
In this work, we have developed an organic solar cell from a new synthesized polymer PTBFD based on a two-dimensional conjugated polymer of the donor-acceptor type and comparatively investigated its characteristics with…
One of the most important technological parameters in the gas-phase preparation of epitaxial silicon Si/Si or heterostructures of the Si-Ge/Si type is the halogenide content in semiconductor deposited from the gas phase…
In this work, by implantation of Ni+ ions in Si in combination with annealing the nanocrystalline phases and layers of NiSi2 were obtained in near surface Si layer at the depth of 15−25 nm. At D = 8×1016 cm−3 , a…
The theory of the shape of the line of size-phonon absorption of light in a size-quantized cylindrical semiconductor wire is developed. It is shown that the size-phonon absorption contains a square logarithmic…
Here we present the results of our study on the feasibility of a multi-pass pumping scheme in solar lasers. A secondary concentrator has been developed to ensure the multiple passage of solar photons through the active…
This paper describes methods for synthesizing different nanostructures of ZnO in aqueous solutions at low temperatures and examines the effect of the size of the synthesized samples on the photoluminescence (PL)…
The effect of electron irradiation up to fluence of 1.54×1017 electron/cm2 on the structural parameters, sizes of nanocrystallites, microstrains, and Raman spectra of a single-walled carbon nanotube (SWCNT) was studied…
The temperature dependence of a resistance in solid solution Ga(1-х)MnхAs with the x=0.0156 have been presented. It was established that the temperature dependence of the resistance measured along the crystal axes [110]…
A numerical calculation of the temperature dependence of the chemical potential for various values of the filling factor n of the Landau level is carried out. The degree of filling of each Landau level is found as a…
The degrees of polarization of diffusively transmitted and diffusively reflected backward radiation due to multiple scattering in layers of turbid medium with a finite optical thickness when the medium was excited by…
In this paper, the nature and behavior of small-scale perturbation modes in disc-shaped galaxies were considered. The gravitational instabilities of horizontal small-scale perturbation modes, such as (m;N)=(12;20)…
The paper presents the experimental results of mass-spectrometric studies of the regularity of surface ionization of stimulants. Mass-spectra of these substances, temperature dependences of ion currents were obtained…
The possibility of obtaining highly dispersed powders of amorphous silicon dioxide from technogenic metallurgical wastes, which are dump slags of copper-smelting production and dustlike waste of the production of…
By carbothermic reduction of microsilica, which is a highly dispersed technogenic waste from the production of technical silicon and ferrosilicon, containing 95-97 wt.% amorphous silicon dioxide, micro- and nanopowders…
In this work, using mass spectrometric techniques and surface ionization of CsCl molecules, the initial stages of the carbon film growth on the surface of rhenium by the diffusion from the bulk, were studied. It has…
DFT (density functional theory) method in the B3LYP/cc-pVTZ approximation is used to perform quantum-chemical simulation of conformational properties of the propanol molecule. A complete scan of the potential energy…
The EPR spectra of γ- and n-γ-reactor irradiated steatite ceramics SK-1 and SNC has been studied. It is shown that structural defects of the E ′-center type are created in the structure of the SK-1 and SNC ceramics…
The unimolecular decays on all stoichiometrically possible fragmentation channels of the emitted NbnOm− clusters under sputtering of niobium surface by Xe+ ion beams and blowing by oxygen have been studied. The…
The energy parameters of the process of thermal disordering of the crystal lattice in superionic crystals of the LaF3 type are investigated. A new approach to the interpretation of the energy parameters of internal…
The article is devoted to the presentation and discussion of the primary results of an experimental study of the possibility of using the modern "transient photoconductance method" and "noncontact quasi-steady state…
The Kane model is used to calculate the cyclotron mass of an electron in an InAs quantum well. The calculations were carried out in the approximation of infinity of the depth of the quantum well, taking into account the…
For irradiation of neoplasms located near vital radiosensitive structures and organs, it is necessary to ensure precise spatial alignment of the beam with the target in proton therapy sessions. The aim of this work is…
The cross sections for the formation of isomeric states in the reactions (γ, n) and (n, 2n) on the 81Br nuclei were measured by the induced activity method. The energy dependences of the isomeric ratio of the yields of…
This paper reformulates the stability structure of force-free magnetosphere of a rotating black hole discussed in paper [1]. We do some corrections in the main equations of relativistic magnetohydrodynamics written by…
The paper presents the results of thermoionic mass- and thermodesorption spectrometry of the drugs pregabalin (lyrica), carbamazepine and tropicamide. These drugs are widely used in illegal circulation and often abused…
Investigations are presented to identify the conditions of formation nanocomposites based on isotactic polypropylene (PP), maleinized PP (PPMA) and their mixtures with modified montmorillonite, Cloisite 20A (MMT…
The experimental results of measuring the yield of secondary ions and neutral calcium atoms under the bombardment of a CaCO3 target with cluster ions Bim + (m = 1−5) in the energy range 1−10 keV have been presented…
The analytical expression and the experimental curve of the exponential absorption spectrum of amorphous Se0.5S0.5 selenium-sulphur compound are compared. The parameters in the analytical expression for the exponential…
In the interactions of 10.6 A GeV gold nuclei with heavy emulsion nuclei, the characteristics of the transverse momenta of doublе-charged projectile fragments are studied. In collisions with small impact parameters…
Numerical results of investigation of the thermodynamic properties of the quasi-two-dimensional electron gas are presented, namely, the density of states, the temperature derivative of the chemical potential, and the…
The theoretical analysis of electric characteristics of the positive parity states in isotopes 158,160Gd has been carried out in the phenomenological model taking into account the Coriolis mixing of low-lying states in…
The article presents an analysis of modem methods for eliminating defects in facial soft tissues, classifies defects and deformations of the maxillofacial region, including the use of revascularized autografts…
The article studies the microbiocenosis of the mucous membrane of the posterior pharyngeal wall and palatine tonsils in 52 patients with chronic tonsillitis and m 12 practically healthy elderly and senile persons. The…
To study the clinical and anamnestic characteristics of patients with changes in the organ of vision in atherosclerosis (AS). Material and methods: 156 patients with laboratory-clmically diagnosed atherosclerosis…
Determination of the average daily energy' needs of the body of athletes, depending on the type of sports activity. gender and skill. Material and methods: Athletes (master of sports and candidates for master of sports)…
Half of the patients undergo various kinds of interventions without morphological examination: tooth extraction, maxillary sinus puncture regarding the alleged 'maxillary' sinusitis”, conchotomy and sinusotomy. The…
To establish the degree of functional imbalance in patients with cervical osteochondrosis outside the stage of exacerbation of the disease. Material and methods: Rotational test was performed in 36 patients with…
The article considers the feasibility of using aligners before prosthetics for secondary deformities of the dentition m children.
The article provides an analysis of the literature of recent years devoted to the study of the basics of diseases in case of dentoalveolar anomalies and deformities in children and adolescents with bronchial asthma, and…
The Literature review presents up-to-date data from world databases on the research topic. The analysis of modem literature sources has shown the relevance of the problem of prevention of dental diseases in young…
This article provides a large list of risk factors, the presence of which causes diseases of the dental system, distinguish endogenous and exogenous, specific and non-specific risk factors. Stops at ekzogennye…
Summary: The article presents an analysis of the literature on prosthetics on dental implants, providing for the optimal, in terms of quantity and quality, bone tissue of the alveolar process of the upper and lower jaw…
In modem dentistry, one of the leading and complex problems in the structure of oral diseases is parodontal pathology: According to the WHO. a healthy parodontium is found only m 2-10% of the population, a special place…
The analysis of the current literature reflecting the etiology’ of dental caries m young school age children was made. The authors analyzed different causes on key cariogenic factors: carbohydrate, hygienic. microbial…
Современные методы лечения кариеса зубов предполагают препарирование некротизированных тканей с использованием абразивных вращающихся инструментов и последующее пломбирование образовавшегося дефекта. Болезненность…
This article shows the results of a study of the effect of surgical preparation of the oral cavity to prosthetics. Based on our research it was proved that a well-designed and implemented oral preparation plan is the…
Determining the quantity, symmetry and timing of teeth eruption termmation in intermediate school aged children. Material and methods: S20 children aged 11 to 14 years, including 415 boys and 405 girls studying in 4…
The possibility of using ultrasound osteometry for the diagnosis of acute odontogenic osteitis and osteomyelitis of the jaws was studied. The study was conducted in 43 children, of which 14 children and 15 adults had…
This article describes the relevance of the prevention and diagnosis of caries in the early stages using modem diagnostic methods. It also presents a study of caries susceptibility of orthodontic patients (children and…