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389 results match your criteria: "L.N. Gumilyov Eurasian National University[Affiliation]"
Nickel oxide (NiO) is known for its remarkable theoretical specific capacity, making it a highly appealing option for electrode materials in electrochemical energy storage applications. Nevertheless, its practical use is limited by poor electrochemical performance and complicated electrode fabrication processes. To address these issues, we propose a new anode design comprising an intermediate NiO nanoarray layer and a carbon coating layer grown directly on a three-dimensional (3D) conductive nickel foam substrate, designated as C@NiO@Ni foam.
View Article and Find Full Text PDFJ Radiat Res
December 2024
The Center for Peace, Hiroshima University, Higashisenda-machi 1-1-89, Naka-ku, Hiroshima 730-0053, Japan.
Radiobiological studies are ongoing to understand the consequences of internal exposure to neutron-activated radioactive microparticles, which were sprayed over experimental rats and mice. Special attention in these experiments is given to internal irradiation with radioactive microparticles with short-lived neutron-activated radionuclides 31Si (T1/2 = 2.62 h) and 56Mn (T1/2 = 2.
View Article and Find Full Text PDFPolymers (Basel)
November 2024
Department of Industrial and Civil Construction Technology, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan.
This study investigates the modification of bituminous mixtures by varying percentages of PET particles (1%, 3%, 5%, 8%, 10%, and 12% PET). The following methods were employed to analyze the samples: the ring-and-ball softening point determination method (ASTM D36/D36M-14), the Fraass breaking point determination method (EN 12593: 2015), the elongation determination method (EN 13589: 2014), and the needle penetration depth determination method (EN 1426: 2015). Optimal bitumen/PET ratios were identified to obtain modified bituminous mixtures (MBMs) with enhanced operational characteristics (5% and 8% PET).
View Article and Find Full Text PDFPlants (Basel)
November 2024
Doctoral School of Natural Sciences, Moldova State University, 75A M. Kogalniceanu Str., MD-2009 Chisinau, Moldova.
The study, carried out as part of the International Cooperative Program on Effects of Air Pollution on Natural Vegetation and Crops, involved collecting 95 moss samples across the territory of Georgia during the period from 2019 to 2023. Primarily samples of were selected, with supplementary samples of , , and in cases of the former's absence. The content of 14 elements (Al, Ba, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, S, Sr, V, and Zn) was detected using Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), while the Hg content was determined using a Direct Mercury Analyzer.
View Article and Find Full Text PDFData Brief
June 2024
Faculty of Architecture and Civil Engineering, L.N. Gumilyov Eurasian National University, 13 Kazhymukan Street, 010005 Astana, Kazakhstan.
The paper presents data on the complex processing of large-tonnage waste from oil and gas industry and chemical production, as well the methods of their utilization and processing. The data was collected at the industrial sites of the plants in Western Kazakhstan. During the work, there were studied data on the chemical composition of the waste, properties of the experimental compositions, material structure, and peculiarities of the technological processes of recycling.
View Article and Find Full Text PDFBiochemistry
December 2024
Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University of Jerusalem, Jerusalem 9112102, Israel.
Chemosphere
December 2024
Institute of Plant Protection - National Research Institute, Laboratory of Food and Feed Safety, Chelmonskiego 22 Street, 15-195, Bialystok, Poland. Electronic address:
Fruit and vegetables are a basic component of the human diet. European pesticide monitoring data indicated recently that in one sample multiple residues were detected which might be a public concern. Thus, the challenge of the present study was to assess the potential dietary exposure of the most critical EU children and adults subpopulations consuming fruit and vegetables.
View Article and Find Full Text PDFMost of the world's mountains are distributed across national boundaries. However, due to the sovereignty of national boundaries, conservation plans between neighboring countries are often uncoordinated. Against the backdrop of impending environmental changes, transboundary mountain ecosystems and biodiversity face significant threats.
View Article and Find Full Text PDFFront Plant Sci
November 2024
Plant Genetic Engineering Laboratory, National Center for Biotechnology, Astana, Kazakhstan.
Species of are important ornamental plants used for horticultural purposes in various countries, across Asia, Europe, and North Africa. The present study is the first report on typical features of the complete chloroplast genome sequence of four local and endangered species including , and from Kazakhstan using Illumina sequencing technology. The comparative analyses revealed that the complete genomes of four species were highly conserved in terms of total genome size (152.
View Article and Find Full Text PDFMolecules
November 2024
Department of Technical Physics, L. N. Gumilyov Eurasian National University, Astana 010000, Kazakhstan.
This study employs Density Functional Theory (DFT) calculations and traditional all-atom Molecular Dynamics (MD) simulations to reveal atomistic insights into a task-specific Deep Eutectic Solvent (DES) supported by graphene oxide with the aim of mimicking its application in the natural gas desulfurization process. The DES, composed of N,N,N',N'-tetramthyl-1,6-hexane diamine acetate (TMHDAAc) and methyldiethanolamine (MDEA) supported by graphene oxide, demonstrates improved efficiency in removing hydrogen sulfide from methane. Optimized structure and HOMO-LUMO orbital analyses reveal the distinct spatial arrangements and interactions between hydrogen sulfide, methane, and DES components, highlighting the efficacy of the DES in facilitating the separation of hydrogen sulfide from methane through DFT calculations.
View Article and Find Full Text PDFBiomolecules
October 2024
Stem Cell Laboratory, National Center for Biotechnology, Astana 010000, Kazakhstan.
Sci Rep
November 2024
Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana, 010008, Kazakhstan.
Nanomaterials (Basel)
November 2024
Institute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, Kazhymukan Str., 13, 010000 Astana, Kazakhstan.
Nanomaterials (Basel)
November 2024
Institute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, 13 Kazhymukan st., 010000 Astana, Kazakhstan.
Colloidal quasi-two-dimensional cadmium chalcogenide nanoplatelets have attracted considerable interest due to their narrow excitonic emission and absorption bands, making them promising candidates for advanced optical applications. In this study, the synthesis of quasi-two-dimensional CdSe NPLs with a thickness of 3.5 monolayers was investigated to understand the effects of synthesis temperature on their stoichiometry, morphology, and optical properties.
View Article and Find Full Text PDFGels
November 2024
Department of Philosophy, al-Farabi Kazakh National University, Almaty 050040, Kazakhstan.
The current state of affairs in the field of using polymer hydrogels for the creation of innovative systems for signal and image processing, of which computing is a special case, is analyzed. Both of these specific examples of systems capable of forming an alternative to the existing semiconductor-based computing technology, but assuming preservation of the used algorithmic basis, and non-trivial signal converters, the nature of which requires transition to fundamentally different algorithms of data processing, are considered. It is shown that the variability of currently developed information processing systems based on the use of polymers, including polymer hydrogels, leads to the need to search for complementary algorithms.
View Article and Find Full Text PDFPLoS One
November 2024
Humanitarian School, Narxoz University, Almaty, Kazakhstan.
Objective: The aim of this study was to investigate the differences in the level and sources of work-related stress among financial professionals regarding age, work experience, and educational level.
Methods: A cross-sectional research design was employed among 702 financial professionals in Kazakhstan who worked in different corporate and government organizations. Data on work-related stress were collected via online questionnaires using the Job Stress Survey (JSS).
Monaldi Arch Chest Dis
November 2024
Department of Clinical Subjects, Al-Farabi Kazakh National University, Almaty.
The presence of chronic obstructive pulmonary disease (COPD) and COVID-19 infection is a detrimental combination for patients and can cause negative clinical consequences. The investigation aimed to compare sociodemographic and clinical parameters of COPD individuals hospitalized for exacerbations before and at the end of the COVID-19 pandemic. An observational cross-sectional study including 222 patients with COPD was conducted in two stages: a survey and assessment of clinical and laboratory data of patients hospitalized from September 2022 to March 2023 (n=98) and processing of the medical histories of patients with COPD who received hospital treatment in 2017 and 2018 (n=124).
View Article and Find Full Text PDFPhys Chem Chem Phys
November 2024
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Science, Novosibirsk 630090, Russian Federation.
Based on density functional theory and evolutionary algorithms the thermodynamically stable structures of MnN and their stability - fields were revealed in the pressure range of 0-50 GPa. The MnN-4̄3 polymorph (zinc blende-type) was shown to be the ambient pressure phase, while experimentally known MnN-4/ (distorted NaCl-type) is a high-temperature phase quenchable to the ambient condition. At 5.
View Article and Find Full Text PDFFront Genet
October 2024
Laboratory of Bioinformatics and Systems Biology, Center for Life Sciences, National Laboratory Astana, Nazarbayev University, Astana, Kazakhstan.
Molecules
October 2024
National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana 010000, Kazakhstan.
Carbazole-based molecules play a significant role in dye-sensitized solar cells (DSSCs) due to their advantageous properties. Carbazole derivatives are known for their thermal stability, high hole-transport capability, electron-rich (p-type) characteristics, elevated photoconductivity, excellent chemical stability, and commercial availability. This review focuses on DSSCs, including their structures, working principles, device characterization, and the photovoltaic performance of carbazole-based derivatives.
View Article and Find Full Text PDFFood Chem
February 2025
Medical University of Bialystok, Department of Clinical Pharmacology, Bialystok, Poland. Electronic address:
Apples are one of the most widely consumed raw fruit worldwide. Due to multiple sprayings during the growing season, they can contain pesticide residues affecting quality of food and human health. The novelty of the present study was a comprehensive multi-year control of a broad spectrum of pesticides in apples (2006-2022) and dietary risk assessment with changing toxicological values: ADI/ARfD/MRL.
View Article and Find Full Text PDFVet World
September 2024
Laboratory of Immunochemistry and Immunobiotechnology, National Center for Biotechnology, 010000, Astana, Kazakhstan.
Background And Aim: Bovine interleukin 15 (bIL15) is a potential immunotherapy that can block the spread of bovine leukemia virus (BLV). However, immune checkpoints that maintain body homeostasis may reduce their effectiveness. Thus, an analysis of the effectiveness of bIL15 while blocking negative immune regulators is necessary.
View Article and Find Full Text PDFMaterials (Basel)
October 2024
Department of Chemistry, Chemical Technology and Ecology, Almaty Technological University, Almaty 050012, Kazakhstan.
In this work, composite materials were obtained for the first time using various methods and the dependences of the resulting surface morphologies were investigated. This involves modifying the surface with cucurbit[n]urils, which are highly promising macrocyclic compounds. The process includes applying cucurbit[6]uril to the hydroxyapatite surface in water using different modification techniques.
View Article and Find Full Text PDFPolymers (Basel)
October 2024
Department of Chemistry, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan.
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 for its formation.
View Article and Find Full Text PDF