Chemistry
Искать по
Недавние добавления
-
The Synthesis of a New Glycoluryl–Melamine–Formaldehyde Polymer under the Action of HEDP and the Investigation of the Content of Methylol Groups and Free Formaldehyde
(Polymers, 2024)This study outlines a method for preparing a complex involving glycoluril and melamine (GU-ME). The structure of the resultant complex was analyzed using IR and NMR spectroscopy. In the subsequent phase, the polymer GUMEFA was derived from the resultant complex, employing hydroxyethylidene diphosphonic acid (HEDP) as a sustainable plasticizer, with a proposed chemical mechanism ...2026-03-05 -
The effect of temperature factor during heavy ion irradiation on structural disordering of SiC ceramics
(Optical Materials: X, 2025)The paper presents the results of the influence of heavy ion irradiation on the formation of anisotropic distortions of the crystal structure and electron density distribution in SiC ceramics. The assessment of the change in the properties of the damaged layer was carried out using Raman spectroscopy methods, and using data on structural changes obtained using the X-ray ...2026-03-05 -
The effect of residual mechanical stresses and vacancy defects on the diffusion expansion of the damaged layer during irradiation of BeO ceramics
(Optical Materials: X, 2024)The paper presents the results of a study on the application of Raman and UV spectroscopy methods to determine the structural damage kinetics in the near-surface layer of BeO ceramics caused by high-dose irradiation with He2+ ions. Interest in this type of ceramics is due to the combination of its structural and thermophysical pa rameters, making these ceramics one of the ...2026-03-05 -
Temperature-dependent luminescence of europium-doped Ga₂O₃ ceramics
(Optical Materials: X, 2025)This study explores the synthesis and luminescent properties of europium-doped gallium oxide (Ga₂O₃:Eu) ce ramics fabricated via electron beam-assisted synthesis (EBAS) at 1.4 MeV. The resulting Ga₂O₃:Eu ceramics exhibit a nanocrystalline structure with an average crystallite size of ~30 nm, high crystallinity, and minimal lattice strain (<0.5 %). Luminescence analysis from ...2026-03-05 -
Targeted NGS Revealed Pathogenic Mutation in a 13-Year-Old Patient with Homozygous Familial Hypercholesterolemia: A Case Report
(International Journal of Molecular Sciences, 2024)Familial hypercholesterolemia is an autosomal hereditary disease defined by an increased level of low-density lipoprotein cholesterol (LDL-C), which predisposes significant risks for premature cardiovascular disorders. We present a family trio study: proband, a 13-year-old Kazakh girl with homozygous familial hypercholesterolemia (HoFH) and her parents. HoFH is much more rare ...2026-03-05 -
Synthesis and Study of Oxide Semiconductor Nanoheterostructures in SiO2/Si Track Template
(Crystals, 2024)In this study, chemical deposition was used to synthesize structures of Ga2O3 -NW/SiO2/Si (NW—nanowire) at 348 K and SnO2 -NW/SiO2/Si at 323 K in track templates SiO2/Si (either nor p-type). The resulting crystalline nanowires were δ-Ga2O3 and orthorhombic SnO2 . Computer modeling of the delta phase of gallium oxide yielded a lattice parameter of a = 9.287 Å, which closely ...2026-03-05 -
Synthesis and Investigation of Biological Activity of New Betulonic Acid Derivatives Containing 1,2,3-Triazole Fragments
(Molecules, 2024)The results of this study showed that the compounds synthesized by the authors have significant potential due to their antibacterial and cytotoxic properties. The apparent antibacterial activity demonstrated by the compounds suggests that they are active antimicrobial agents against common microbial pathogens that cause various socially significant infectious diseases. Compound 6 ...2026-03-05 -
Synthesis and Characterization of β-Ga2O3/por-GaAs/mono-GaAs Heterostructures for Enhanced Portable Solar Cells
(PHYSICS AND CHEMISTRY OF SOLID STATE, 2024)This study comprehensively details the successful synthesis of a β-Ga2O3/por-GaAs/mono-GaAs heterostructure designed for portable solar cells. Employing a combination of electrochemical etching and hightemperature oxygen annealing, we engineered a heterostructure that exhibits both crystalline and amorphous phases. XRD, SEM, and Raman spectroscopy analyses confirmed the ...2026-03-05 -
Surface Modification of Mesoporous Silica Nanoparticles for Application in Targeted Delivery Systems of Antitumour Drugs
(Polymers, 2024)The problem of tumour therapy has attracted the attention of many researchers for many decades. One of the promising strategies for the development of new dosage forms to improve oncology treatment efficacy and minimise side effects is the development of nanoparticle-based targeted transport systems for anticancer drugs. Among inorganic nanoparticles, mesoporous silica deserves ...2026-03-05 -
Study of the Influence of Doping Efficiency of CeO2 Ceramics with a Stabilizing Additive Y2O3 on Changes in the Strength and Thermophysical Parameters of Ceramics under High-Temperature Irradiation with Heavy Ions
(Crystals, 2024)The article outlines findings from a comparative analysis of the effectiveness of doping CeO2 ceramics with a stabilizing additive Y2O3 on alterations in the strength and thermophysical parameters of ceramics under high-temperature irradiation with heavy ions comparable in energy to fission fragments of nuclear fuel, which allows, during high-temperature irradiation, to ...2026-03-05 -
Study of the effect of phase formation processes on the change in optical and thermal properties of Nd2Zr2O7 ceramics with a pyrochlore structure
(Optical Materials: X, 2025)The paper presents the results of studies of the influence of phase formation processes with variations in annealing temperature on the processes of stabilization of the crystal structure, optical and thermal properties of Nd2Zr2O7 ceramics, which have great potential for use in optoelectronic applications due to the transitions of Nd3 ions, as well as high stability to ...2026-03-05 -
Study of the application prospects of film detectors for estimation of α-radiation density
(Optical Materials: X, 2025)The aim of this research is to study the prospects of using the proposed methods of optical UV spectroscopy and X-ray diffractometry to determine the radiation density of the daughter products of radon decay - α-particles recorded using polymer track detectors. This paper presents the results of experiments on detecting the daughter products of radon decay - α-particles in ...2026-03-05 -
Study of the applicability of ACdSe (A – Co, Ni) thin films as catalysts for heavy metal capture
(Optical Materials: X, 2024)Expansion of the possibilities of using photoactive thin films with a unique combination of optical and morphological characteristics as a basis for creation of highly efficient catalysts for the aqueous media purifi cation is one of the promising research areas in modern materials science, which has both fundamental signif icance and potential for practical application. This ...2026-03-05 -
Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopy
(Optical Materials: X, 2025)The article presents the results of experimental studies of the effect of the stabilizing MgO dopant using the electron spin resonance (ESP) method on enhancement of the stability of Li2ZrO3 ceramics to defect formation processes and accumulation of radiolysis products in the near-surface layer in the case of high-dose irradiation with protons simulating the hydrogenation ...2026-03-05 -
Stress-Induced Secondary Metabolite Profiling in Cistanche deserticola Callus Cultures: Insights from GC-MS and HPLC-MS Analysis
(International Journal of Molecular Sciences, 2025)Throughout human history, wild plant resources have played an invaluable role, serving as critical sources of food, medicine, and industrial materials. This study examined the callus cultures of Cistanche deserticola Y.C. Ma, a medicinal desert plant, by subjecting them to abiotic stress under controlled in vitro conditions. The secondary metabolite profiles were then analyzed ...2026-03-05 -
Specifics of Data Collection and Data Processing during Formation of RailVista Dataset for Machine Learning- and Deep Learning-Based Applications
(Sensors, 2024)This paper presents the methodology and outcomes of creating the Rail Vista dataset, designed for detecting defects on railway tracks using machine and deep learning techniques. The dataset comprises 200,000 high-resolution images categorized into 19 distinct classes covering various railway infrastructure defects. The data collection involved a meticulous process including ...2026-03-05 -
Recombination Luminescence and Electron–Hole Trapping Centers in BaSO4-Bi Phosphor
(Crystals, 2025)This study of the BaSO4-Bi phosphor has revealed that the accumulated energy after external optical excitation exhibits specific characteristics. During irradiation with photon energy exceeding the bandgap, in addition to the intrinsic ultraviolet emission of the Bi3+ ion, several recombination emissions and emission from the Bi2+ ion are observed. At 80 K, the recombination ...2026-03-05 -
Radiation-Induced miRNAs Changes and cf mtDNA Level in Trauma Surgeons: Epigenetic and Molecular Biomarkers of X-ray Exposure
(International Journal of Molecular Sciences, 2024)Exposure to ionizing radiation can result in the development of a number of diseases, including cancer, cataracts and neurodegenerative pathologies. Certain occupational groups are exposed to both natural and artificial sources of radiation as a consequence of their professional activities. The development of non-invasive biomarkers to assess the risk of exposure to ...2026-03-05 -
Prerequisites for Developing a Classification of Phase Transitions in Systems Based on Thermosensitive Polymers: Use of a Semi-Empirical Model
(Polymers, 2025)It is shown that the extensive experimental material available in the literature reflecting the behaviour of thermosensitive hydrogels and solutions of thermosensitive polymers requires systematisation and generalisation. Additional evidence is given that the method of forward and reverse phase portraits is an important tool for the systematisation of such data. It is shown ...2026-03-05 -
Preparation and application of stimuli-responsive PET TeMs: RAFT graft block copolymerisation of styrene and acrylic acid for the separation of water–oil emulsions
(Royal Society of Chemistry, 2024)Stimuli-responsive membranes play an important role in the fields of biomedicine, food and chemical industries, and environmental applications, including separation of water–oil emulsions. In this study, we present a method to fabricate pH-sensitive membranes using UV-initiated RAFT graft copolymerization of styrene (ST) and acrylic acid (AA) on poly(ethylene terephthalate) ...2026-03-05
RSS 1.0