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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanova O. S., Lin, Chun-Rong, Edelman I. S., Svetlitsky E. S., Sokolov A. Е., Zharkov S. M., Sukhachev A. L., Vorobyev S. A., Petrov D. A., Lin, En-Szu
Заглавие : Adsorption properties and catalytic activity of Fe3O4-Ag nanostructures
Колич.характеристики :12 с
Место публикации : Appl. Surf. Sci. - 2024. - Vol. 665. - Ст.160236. - ISSN 01694332 (ISSN), DOI 10.1016/j.apsusc.2024.160236. - ISSN 18735584 (eISSN)
Примечания : Cited References: 48. - The work is supported by the Russian Science Foundation (project no. 23-22-10025, https://rscf.ru/project/ 23-22-10025/) and by the Krasnoyarsk Regional Fund of Science and Technology Support. The electron microscopy and EDS investigations were conducted in the SFU Joint Scientific Center. Magnetic investigations were carried out in the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS"
Аннотация: The morphology and magnetic properties as well as adsorption capacity and catalytic activity of Fe3O4-Ag nanoparticles synthesized by the solvothermal method were studied in dependence on the duration of the thermolysis process (3, 6, and 8 h). X-ray diffraction, transmission electron microscopy, and energy-dispersive spectroscopy measurements showed that the morphology of nanoparticles changed strongly as the duration of thermolysis increased. At 6 and 8 h duration, Fe3O4 nanocrystals grow and assemble into porous spherical globules with an Ag core (samples 2 and 3). These samples demonstrate high magnetization value and very low coercivity. The adsorption capacity of nanoparticles was studied with respect to two organic dyes: cationic methylene blue (MB) and anionic Congo red (CR). The particles showed preferential adsorption of the cationic dye. High catalytic activity towards four dyes: MB, methyl orange (MO), CR, and Rhodamine C (RhC) at the presence of NaBH4 is the remarkable property of these samples. The rate constant of the catalytic reaction was 1.4 min−1. Simultaneous exposure of CR and MO dyes to nanoparticles and NaBH4 caused their irreversible 100 % degradation while in the case of MB and RhC, a transition to their leuco form occurred.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhandun V. S., Zamkova N. G., Draganyuk O. N.
Заглавие : The arising of ferromagnetism in Al-doped Mn2(Ga1−xAlx)C MAX phases
Колич.характеристики :5 с
Место публикации : J. Magn. Magn. Mater. - 2024. - Vol. 601. - Ст.172193. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2024.172193. - ISSN 18734766 (eISSN)
Примечания : Cited References: 30. - The study was funded by a grant from the Russian Science Foundation # 23-22-10020 https://rscf.ru/project/23-22-10020/, Krasnoyarsk Regional Fund of Science. The calculations were performed with the computer resources of "Complex modeling and data processing research installations of mega-class" SRC "Kurchatovsky Institute" (http://ckp.urcki.ru). The ternary phase diagrams for the calculation of formation enthalpies were taken from Materials Project (https://materialsproject.org) and OQMD (https://oqmd.org/) databases
Аннотация: The magnetic properties of ordered MAX phases Mn2(AlxGa1−x)C (x = 0.125, 0.25, 0.5, 0.75 and 0.875) have been studied within the DFT-GGA. We have found that increase of Al atom at A-site leads to the formation of the ferromagnetic phase with large magnetization of about 3.6 μB/f.u. The investigation of the phase stability is performed by comparing the total energy of the MAX phases with that of a set of competitive phases for calculation of the phase formation enthalpy. Up to a concentration of Al atoms x = 0.7 the compound remains thermodynamically stable. The exchange constants analysis shows the crucial role of exchange interactions between manganese atoms along the c-axis in forming of ferromagnetism. The magnetic transition temperature of Mn2(AlxGa1−x)C alloys increases with increase of the aluminum concentration.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krasnov A. I., Pankin P. S., Romanenko G. A., Sutormin V. S., Maksimov D. N., Vetrov S. Ya., Timofeev I. V.
Заглавие : Photonic bound states in the continuum governed by heating
Колич.характеристики :6 с
Место публикации : Phys. Rev. E. - 2024. - Vol. 109, Is. 5. - Ст.054703. - ISSN 24700045 (ISSN), DOI 10.1103/PhysRevE.109.054703. - ISSN 24700053 (eISSN)
Примечания : Cited References: 50. - This work was supported by the Russian Science Foundation under Grant No. 22-22-00687
Аннотация: A photonic crystal microcavity with the liquid crystal resonant layer tunable by heating has been implemented. The multiple vanishing resonant lines corresponding to optical bound states in the continuum are observed. The abrupt change in the resonant linewidth near the vanishing point can be used for temperature sensing.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Knyazev Yu. V., Platunov M. S., Ikkert O. P., Semenov S. V., Bayukov O. A., Nikolenko A. D., Nazmov V. P., Volochaev M. N., Dubrovskiy A. A., Molokeev M. S., Smorodina E. D., Balaev D. A., Karnachuk O. V.
Заглавие : Microbially mediated synthesis of vivianite by Desulfosporosinus on the way to phosphorus recovery
Колич.характеристики :15 с
Место публикации : Environ. Sci.: Adv. - 2024. - Vol. 3, Is. 6. - P.897-911. - ISSN 27547000 (eISSN), DOI 10.1039/D4VA00040D
Примечания : Cited References: 120. - This study was supported by the Russian Science Foundation, project no. 22-24-00601 (https://rscf.ru/project/22-24-00601/). The electron microscopy and Mössbauer studies were carried out on the equipment of the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences. The research contribution of M. S. P. was partially supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental assignment for Synchrotron radiation facility “SKIF”, Boreskov Institute of Catalysis (project FWUR-2024-0040)
Аннотация: We explored the role of biomineralization in industrial waste sludge formation, using the laboratory cultivation of Desulfovibrio sp. OL sulfate reducing species isolated from the Komsomolsky waste sludge (Russia). The most frequently reported sulfate-reducing bacteria (SRB) biomineralization products are various iron sulfides. Here we present first studies of the products of Desulfosporosinus metallidurans, acidophilic SRB from acid mine drainage. We analyzed the biomineralized sample using X-ray diffraction, electron microscopy, X-ray absorption and Mossbauer spectroscopies, and magnetization measurements via First-Order Reversal Curve (FORC) diagram analysis. Our findings show that the biomineralization occurring under pure culture conditions leads to the formation of greigite (Fe3S4) nanorods, along with larger microbially mediated crystals of vivianite (Fe3(PO4)2·8H2O) and siderite (FeCO3). Energy dispersive X-ray spectroscopy revealed that the crystal sizes of vivianite and siderite were comparatively larger than those of the nanorod-shaped greigite. Transmission electron microscopy and Mossbauer spectroscopy detected ultrafine ferrihydrite (Fe2O3·nH2O) superparamagnetic nanoparticles with an average size of 2.5 nm. FORC analysis showed significant magnetic interactions among these nanoparticles, suggesting their potential for magnetic separation applications. The current study demonstrates that ferrihydrite nanoparticles have a strong magnetic affinity for other crystal phases produced by Desulfosporosinus metallidurans. Therefore, we believe that the investigated bacterial species can be exploited in advanced magnetic separation techniques. This offers a cost-effective and environmentally friendly method for purifying sediments in industrial waste sludge.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prudnikova S. V., Kiselev E. G., Demidenko A. V., Nemtsev I. V., Shishatskaya E. I., Thomas S., Volova T. G.
Заглавие : Biodegradation of microbial plastic poly(3-hydroxybutyrate) in soil ecosystems at different latitudes
Колич.характеристики :12 с
Место публикации : Giant. - 2024. - Vol. 18. - Ст.100288. - ISSN 26665425 (eISSN), DOI 10.1016/j.giant.2024.100288
Примечания : Cited References: 96. - The study was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. FWES-2021-0025)
Аннотация: The features of the degradation of the "green" plastic poly(3-hydroxybutyrate) [P(3HB)] in the soil of various geographical regions were studied: in red ferralitic soil under tropical conditions (Kerala, India) and in chernozem soil under conditions of a sharply continental climate (Eastern Siberia, Russia). Significant differences in the chemical composition, temperature, and humidity of the studied soils were revealed. The number of bacteria and mycelial fungi in the Siberian chernozem was higher than in the red soil of India, from 2-3 to 10 or more times. The degradation of P(3HB) films in the chernozem occurred faster than in the red soil, which was drier, with a low content of humus and minerals, and fewer microorganisms than the chernozem. The half-life of polymer samples in Siberia and India was 64.8 and 126.4 days, respectively. During degradation, a decrease in the molecular weight and an increase in the degree of crystallinity of polymer samples were revealed, which indicates a more active biodegradation of the amorphous phase of the polymer by soil microorganisms. The primary degraders of the polymer have been isolated and identified, and it has been shown that the complexes of degrading bacteria and fungi in different types of soils did not have common species. Despite the presence of species with pronounced depolymerase activity, the rate of film degradation in red ferralitic soils was slowed down by unfavorable environmental conditions. The obtained results confirm the importance of studying the process of PHA degradation in natural conditions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kulikov V. R., Kytmanov A. A., Poroshin A. O., Timofeev I. V., Fedchenko D. P.
Заглавие : On linear cellular automata
Колич.характеристики :7 с
Место публикации : Program. Comput. Softw. - 2024. - Vol. 50, Is. 1. - P.24-30. - ISSN 03617688 (ISSN), DOI 10.1134/S0361768824010067. - ISSN 16083261 (eISSN)
Примечания : Cited References: 22. - This work is supported by the Krasnoyarsk Mathematical Center and financed by the Ministry of Science and Higher Education of the Russian Federation (Agreement 075–02–2023–936)
Аннотация: Wolfram cellular automata are considered and their operation is demonstrated using an example of traffic flow simulation. For the class of one-dimensional elementary cellular automata, the concept of linearity is introduced in the language of Zhegalkin operators. An algorithm for finding linear Zhegalkin operators with multipliers of three variables is presented. The algorithm is implemented in Python.
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Вид документа : Однотомное издание
Шифр издания :
Автор(ы) : Орлов, Виталий Александрович
Заглавие : Энергетический рельеф, закрепление и движение топологических магнитных солитонов в одномерных и двумерных массивах взаимодействующих магнитных наноэлементов : специальность 1.3.12 "Физика магнитных явлений" : автореферат диссертации на соискание ученой степени доктора физико-математических наук
Выходные данные : Красноярск, 2024
Колич.характеристики :47 с
Коллективы : Сибирский федеральный университет, Федеральный исследовательский центр "Красноярский научный центр Сибирского отделения Российской академии наук", Институт физики им. Л.В. Киренского Сибирского отделения РАН, Уральский Федеральный университет им. Первого Президента России Б.Н. Ельцина
Примечания : Библиогр.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Бондарев, Виталий Сергеевич, Горев, Михаил Васильевич, Флёров, Игорь Николаевич
Заглавие : Исследование термодинамических свойств керамики Ba0.92Ca0.08Ti0.76Zr0.24O3.
Коллективы : Всероссийская научная конференция студентов-физиков и молодых учёных, Ассоциация студентов-физиков и молодых учёных России, Московский государственный университет им. М.В. Ломоносова, Российское физическое общество, Институт электрофизики УрО РАН
Место публикации : Десятая Всероссийская научная конференция студентов-физиков и молодых ученых (ВНКСФ-10): информ. бюллетень : сборник тезисов : в 2-х ч./ предс. науч. ком. М. В. Садовский. - Екатеринбург, 2004. - Ч. 1. - С. 149
Примечания : Библиогр.: 2
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karavayskiy A. Yu., Lukin Y. I.
Заглавие : Influence of dielectric relaxations of soil water on the temperature dependence of soil permittivity
Колич.характеристики :10 с
Место публикации : Opt. Spectrosc. - 2023. - Vol. 131, Is. 12. - P.1190-1199. - ISSN 0030400X (ISSN), DOI 10.1134/S0030400X24700206. - ISSN 15626911 (eISSN)
Примечания : Cited References: 23. - This work was supported by the Russian Science Foundation and the Krasnoyarsk Regional Fund of Science and Technology Support within the framework of scientific project no. 22-27-20112
Аннотация: Using a generalized refractive mixture dielectric model, the influence of the relative permittivity spectra of bound and unbound water in mineral soil on the nature of the temperature dependence of the relative permittivity of natural mineral soil, with a clay fraction content of 41.3%, was studied in the electromagnetic field frequency range from 50 MHz to 15 GHz. The causes of the emergence of intersections in the relative permittivity spectra of mineral soil, obtained at different temperatures but for a sample of the same moisture content, have been studied. It has been proved that the emergence of such an intersection point in the frequency range up to 1.5 GHz is due to the Maxwell–Wagner effect in bound water. The dependences of the frequency of the intersection point of the relative permittivity spectra of mineral soil on the temperature and volumetric content of bound and unbound water have been studied.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Косырев, Николай Николаевич, Варнаков, Сергей Николаевич
Заглавие : Исследование тонких пленок Fe методом эллипсометрии
Коллективы : Всероссийская научная конференция студентов-физиков и молодых учёных, Ассоциация студентов-физиков и молодых учёных России, Московский государственный университет им. М.В. Ломоносова, Российское физическое общество, Институт электрофизики УрО РАН
Место публикации : Десятая Всероссийская научная конференция студентов-физиков и молодых ученых (ВНКСФ-10): информ. бюллетень : сборник тезисов : в 2-х ч./ предс. науч. ком. М. В. Садовский. - Екатеринбург, 2004. - Ч. 1. - С. 191-192
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