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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Stan S., Balasoiu M., Cristescu C. P., Stolyar S. V., Iskhakov R. S., Raikher Yu. L.
Заглавие : 2nd Fractional Brownian motion simulation for the fractal properties of ferryhidrite nanoparticles
Коллективы : "Complex and magnetic soft matter systems: physico-mechanical properties and structure", International summer school and workshop
Место публикации : 2nd International summer school and workshop complex and magnetic soft matter systems: physico-mechanical properties and structure: books of abstacs. - 2014. - P.78-79
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tyumentseva A. V., Tyutrina E. S., Stolyar S. V., Yaroslavtsev R. N., Velikanov D. A.
Заглавие : Aminated magnetic nanoparticles for epithelial cell separation
Коллективы : International Baltic Conference on Magnetism: focus on nanobiomedicine and smart materials, Балтийский федеральный университет им. И. Канта
Место публикации : 4th International Baltic Conference on Magnetism (IBCM 2021): Book of abstracts. - 2021. - P.208
Примечания : This work was supported by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research projects No. 20-42-242902 and by the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project no. MK-1263.2020.3). We are grateful to the Center of collective use of FRC KSC SB RAS for the provided equipment.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tyumentseva A. V., Yaroslavtsev R. N., Stolyar S. V., Komogortsev S. V., Velikanov D. A., Gerasimova Yu. V., Knyazev Yu. V.
Заглавие : Aminated magnetic nanoparticles functionalized with antibodies for cell separation
Коллективы : Российская академия наук, Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН, Казанский (Приволжский) федеральный университет, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022): Book of abstracts/ program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. M: Magnetism in biology and medicine. - Ст.M.P10. - P.442-443. - ISBN 978-5-94469-051-7
Примечания : Cited References: 2. - The study was supported by the Russian Science Foundation and the Krasnoyarsk Region Science and Technology Support Fund, grant No. 22-14-20020
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Latyshev N. V., Kryukova O. V., Pyankov V. F., Stolyar S. V.
Заглавие : Analysis of Ehrlich ascites carcinoma with electron paramagnetic resonance
Коллективы : IEEE Ural-Siberian Conference on Computational Technologies in Cognitive Science, Genomics and Biomedicine, Урало-Сибирская конференция по вычислительным технологиям в когнитивной науке, геномике и биомедицине, Институт цитологии и генетики СО РАН
Место публикации : IEEE Ural-Siberian conference on computational technologies in cognitive science, genomics and biomedicine (CSGB). - 2021. - Ст.9496012. - P.290-293. - DOI 10.1109/CSGB53040.2021.9496012
Примечания : Cited References: 10
Аннотация: The study was aimed to reveal the dependence of changes in the content of metal-containing proteins and freeradical forms in a suspension of the experimental tumor in different periods of tumor growth using electron paramagnetic resonance. The object of the study was Ehrlich's ascites carcinoma, an experimental undifferentiated tumor, which is used to study various aspects of tumor development under external influences. Ehrlich ascites carcinoma was inoculated into the peritoneal cavity of laboratory mice. We believe that the determination of the concentrations of metal-containing proteins and free-radical forms using this method may be an important prognostic parameter for assessing the state of the tumor. Changes in metabolism will inevitably affect the functionality of cells and, as a consequence, the dynamics of tumor growth. The results of the study showed that metalcontaining proteins belonging to ascites plasma, such as transferrin, ferritin and ceruloplasmin, do not undergo significant changes. The signal from molybdenum-containing proteins also does not change at the stages of experimental tumor growth under consideration. However, in the course of this experiment, it was possible to record a slight decrease in the intensity of the formation of denitrosyl iron complexes with the development of a tumor in the body.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Balaev D. A., Ladygina V. P., Dubrovskiy A. A., Krasikov A. A., Popkov S. I., Bayukov O. A., Knyazev Yu. V., Yaroslavtsev R. N., Volochaev M. N., Iskhakov R. S., Dobretsov K. G., Morozov E. V., Falaleev O. V., Inzhevatkin E. V., Kolenchukova O. A., Chizhova I. A.
Заглавие : Bacterial ferrihydrite nanoparticles: preparation, magnetic properties, and application in medicine
Место публикации : J. Supercond. Novel Magn. - 2018. - Vol. 31, Is. 8. - P.2297-2304. - ISSN 15571939 (ISSN), DOI 10.1007/s10948-018-4700-1
Примечания : Cited References: 37. - The electron microscopy examination was carried out at the Center for Collective Use of the Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences (Krasnoyarsk, Russia).
Ключевые слова (''Своб.индексиров.''): nanoparticles--ferrihydrite--magnetic properties--drug delivery
Аннотация: Nanoparticles of antiferromagnetically ordered materials acquire the uncompensated magnetic moment caused by defects and surface effects. A bright example of such a nano-antiferromagnet is nanoferrihydrite consisting of particles 2–5 nm in size, the magnetic moment of which amounts to hundreds of Bohr magnetons per particle. We present a brief review of the studies on magnetic properties of ferrihydrite produced by bacteria. Special attention is focused on the aspects of possible biomedical applications of this material, i.e., the particle elimination, toxicity, and possible use for targeted drug delivery.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Stolyar S. V., Balaev D. A., Ladygina V. P., Dubrovskiy A. A., Krasikov A. A., Popkov S. I., Bayukov O. A., Yaroslavtsev R. N., Volochaev M. N., Iskhakov R. S., Dobretsov K. G., Falaleev O.V., Chizhova I. A.
Заглавие : Bacterial ferrihydrite nanoparticles: preparation, magnetic properties, and application in medicine
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2017): 1-7 July 2017 : book of abstracts. - 2017. - Ст.3RP-O-10. - P.417
Примечания : Cited References: 8. - Support by the Special Program for Siberian Federal University of the Ministry of Education and Science of the Russian Federation is acknowledged
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Stolyar S. V., Bayukov O. A., Ladygina V. P., Ishchenko L. A., Iskhakov R. S.
Заглавие : Biogenic ferrihydrite nanoparticles doped with gadolinium
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - С. 232. - ISBN 978-5-7444-3124-2
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Cazacu, Nicoleta, Chilom, Claudia G., Iftimie, Sorina, Balasoiu, Maria, Ladygina, Valentina P., Stolyar S. V., Orelovich, Oleg L., Kovalev, Yuriy S., Rogachev, Andrey V.
Заглавие : Biogenic ferrihydrite nanoparticles produced by Klebsiella oxytoca: Characterization, physicochemical properties and bovine serum albumin interactions
Место публикации : Nanomaterials. - 2022. - Vol. 12, Is. 2. - Ст.249. - ISSN 2079-4991(eISSN), DOI 10.3390/nano12020249
Примечания : Cited References: 59. - This research was funded by JINR Themes 02-1-1107-2011/2021, 04-5-1131-2017/2021 and 04-4-1133-2018/2023 and with the financial support of the RO-JINR Projects Nos. 366/11.05.2021 (items 7, 86, 97) and 365/11.05.2021 (items 8, 87 and 98). This work also benefited from the use of the SasView application, originally developed under NSF Award DMR-0520547. SasView also contains the code developed with funding from the EU Horizon 2020 program under the SINE2020 project Grant No 654000. The APC was funded by JINR Theme 02-1-1107-2011/2021, Project No. 366/11.05.2021, item 7. This study used the infrastructure of the Applied Genetics Resource Facility of MIPT (Suport Grant 075-15-2021-684)
Предметные рубрики: MAGNETIC-PROPERTIES
REDUCTION
MOSSBAUER
FERRITIN
DOCKING
BINDING
Аннотация: The synthesis of nanoparticles inside microorganisms is an economical alternative to chemical and physical methods of nanoparticle synthesis. In this study, ferrihydrite nanoparticles synthesized by Klebsiella oxytoca bacterium in special conditions were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDS), small-angle X-ray (SAXS), UV-Vis spectroscopy, fluorescence, fluorescence resonance energy transfer (FRET), and molecular docking. The morphology and the structure of the particles were characterized by means of SEM and SAXS. The elemental content was determined by means of the EDS method. The absorption properties of the ferrihydrite nanoparticles were investigated by UV-Vis spectroscopy. The binding mechanism of the biogenic ferrihydrite nanoparticles to Bovine Serum Albumin (BSA) protein, studied by fluorescence, showed a static and weak process, combined with FRET. Protein denaturation by temperature and urea in the presence of the ferrihydrite nanoparticles demonstrated their influence on the unfolding process. The AutoDock Vina and UCSF Chimera programs were used to predict the optimal binding site of the ferrihydrite to BSA and to find the location of the hydrophobic cavities in the sub-domain IIA of the BSA structure.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Kolenchukova, Oksana A., Boldyreva, Anna V., Kudryasheva, Nadezda S., Gerasimova Yu. V., Krasikov A. A., Yaroslavtsev R. N., Bayukov O. A., Ladygina, Valentina P., Birukova, Elena A.
Заглавие : Biogenic ferrihydrite nanoparticles: Synthesis, properties in vitro and in vivo testing and the concentration effect
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Territory; Regional Science Foundation [20-416-242907]
Место публикации : Biomedicines. - 2021. - Vol. 9, Is. 3. - Ст.323. - ISSN 2227-9059(eISSN), DOI 10.3390/biomedicines9030323
Примечания : Cited References: 52. - This research was funded by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory and the Regional Science Foundation, grant number 20-416-242907
Аннотация: Biogenic ferrihydrite nanoparticles were synthesized as a result of the cultivation of Klebsiella oxytoca microorganisms. The distribution of nanoparticles in the body of laboratory animals and the physical properties of the nanoparticles were studied. The synthesized ferrihydrite nanoparticles are superparamagnetic at room temperature, and the characteristic blocking temperature is 23-25 K. The uncompensated moment of ferrihydrite particles was determined to be approximately 200 Bohr magnetons. In vitro testing of different concentrations of ferrihydrite nanoparticles for the functional activity of neutrophilic granulocytes by the chemiluminescence method showed an increase in the release of primary oxygen radicals by blood phagocytes when exposed to a minimum concentration and a decrease in secondary radicals when exposed to a maximum concentration. In vivo testing of ferrihydrite nanoparticles on Wister rats showed that a suspension of ferrihydrite nanoparticles has chronic toxicity, since it causes morphological changes in organs, mainly in the spleen, which are characterized by the accumulation of hemosiderin nanoparticles (stained blue according to Perls). Ferrihydrite can also directly or indirectly stimulate the proliferation and intracellular regeneration of hepatocytes. The partial detection of Perls-positive cells in the liver and kidneys can be explained by the rapid elimination from organs and the high dispersion of the nanomaterial. Thus, it is necessary to carry out studies of these processes at the systemic level, since the introduction of nanoparticles into the body is characterized by adaptive-proliferative processes, accompanied by the development of cell dystrophy and tension of the phagocytic system.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Stolyar S. V., Ishchenko L. A., Ladygina V. P., Bayukov O. A., Iskhakov R. S., Antonov A. I.
Заглавие : Biogenic nanoparticles of ferrihydrites
Коллективы : "Complex and magnetic soft matter systems: physico-mechanical properties and structure", International summer school and workshop
Место публикации : 2nd International summer school and workshop complex and magnetic soft matter systems: physico-mechanical properties and structure: books of abstacs. - 2014. - P.11
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Balasoiu M., Kuklin A. I., Arzumanian G. M., Murugova T. N., Stolyar S. V., Iskhakov R. S., Ishchenko L. A., Raikher Yu. L.
Заглавие : Biogenic nanoparticles produced by bacteria Klebsiella Oxytoca: structure investigations : Chapter
Место публикации : Modern trends of nanoscience/ ed.: M. Balasoiu, G. M. Arzumanian. - Bucharest: Publishing House of Romanian Academy, 2012. - Chapter. - P.179-186. - ISBN 978-973-27-2230-5
Аннотация: A promising new dimension in this field is the use of microorganisms for the production of inorganic nanoscale particles. The clean, nontoxic and environmentally friendly ability of eukaryotic and prokaryotic microorganisms to form nanoparticles either intra- or extra-cellularly is particularly important in the development of nanobiotechnology. The development of techniques for the synthesis of nanoparticles of well-defined size, shape and composition is a challenge and an important area of research. Steps in the methodological work for structural properties determination of biogenic ferrihydrite nanoparticles by means of small angle techniques are reviewed.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chilom C. G., Gazdaru D. M., Balasoiu M., Bacalum M., Stolyar S. V., Popescu A. I.
Заглавие : Biomedical application of biogenic ferrihydrite nanoparticles
Место публикации : Rom. J. Phys. - 2017. - Vol. 62, Is. 3-4. - Ст.701. - С. P. - ISSN 1221146X (ISSN)
Примечания : Cited References: 13. - The work was accomplished with the financial support of the IUNC Structural and spectrophotometric characterization of biogenic systems, Grants 4-1069-2009/2014 and 04-4-1121-2015/2017. Biological studies were accomplished with the financial support of Romanian National Authority for Scientific Research, CNDI-UEFISCDI, Project number: PN 16 42 02 03. The authors are very much indebted to Virginia Dincă and Gabriel Prodan for TEM images and to Gabriel Socol for FT-IR spectra.
Ключевые слова (''Своб.индексиров.''): bacterial nanoparticles--albumins-ferrihydrite nanoparticles interaction--cell lines--cytotoxicity--hemolytic effect
Аннотация: Spectroscopic properties of biogenic ferrihydrite nanoparticles, produced by Klebsiella oxytoca, were investigated. Their interaction with two serum albumins was moderate. A very weak stabilization of protein structure to denaturation, in the presence of nanoparticles, was put in evidence. Nanoparticle cytotoxicity and their hemolytic effect were studied on healthy and tumour cells.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Krasikov A. A., Stolyar S. V., Iskhakov R. S., Ladygina V. P., Yaroslavtsev R. N., Bayukov O. A., Vorotynov A. M., Volochaev M. N., Dubrovskiy A. A.
Заглавие : Change in the magnetic properties of nanoferrihydrite with an increase in the volume of nanoparticles during low-temperature annealing
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 58, Is. 9. - P.1782-1791. - ISSN 10637834 (ISSN), DOI 10.1134/S1063783416090092
Примечания : Cited References: 32. - This study was supported by the Ministry of Education and Science of the Russian Federation within the State Task for 2014-2016.
Предметные рубрики: FERRIHYDRITE NANOPARTICLES
BACTERIAL FERRIHYDRITE
FERRITIN
HYSTERESIS
MOSSBAUER
ORIGIN
Аннотация: The results of the investigation into the effect of low-temperature annealing of a powder of nanoparticles of bacterial ferrihydrite on its magnetic properties have been presented. It has been found that an increase in the time (up to 240 h) and temperature (in the range from 150 to 200°C) of annealing leads to a monotonic increase in the superparamagnetic blocking temperature, the coercive force, and the threshold field of the opening of the magnetic hysteresis loop (at liquid-helium temperatures), as well as to an increase in the magnetic resonance line width at low temperatures and in the magnetic susceptibility at room temperature. At the same time, according to the results of the analysis of the Mossbauer spectra, the annealing of ferrihydrite does not lead to the formation of new iron oxide phases. Most of these features are well consistent with the fact that the low-temperature annealing of ferrihydrite causes an increase in the size of nanoparticles, which is confirmed by the results of transmission electron microscopy studies. © 2016, Pleiades Publishing, Ltd.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Anghel L., Balasoiu M., Ishchenko L. A., Stolyar S. V., Kurkin T. S., Rogachev A. V., Kuklin A. I., Kovalev Yu.S., Raikher Yu.L., Iskhakov R. S., Duca G.
Заглавие : Characterization of bio-synthesized nanoparticles produced by Klebsiella oxytoca
Коллективы : International Workshop on SANS-YuMO User Meeting at the Start-up of Scientific Experiments on the IBR-2M Reactor: Devoted to the 75th Anniversary of Yu M Ostanevich's Birth
Место публикации : Journal of Physics: Conference Series. - 2012. - Vol. 351, Is. 1. - Ст.012005. - P. - ISSN 1742-6588, DOI 10.1088/1742-6596/351/1/012005
Ключевые слова (''Своб.индексиров.''): absorption peaks--biominerals--chemical compositions--exopolysaccharides--ferrihydrites--fitting procedure--ftir spectroscopy--klebsiella oxytoca--model calculations--morphological analysis--radius of gyration--scattering objects--small angle x-ray scattering--structural and morphological properties--structural investigation--uv-vis spectroscopy--water dispersion--water-dispersed--experiments--nanoparticles--polysaccharides--raman spectroscopy--scattering--ultraviolet visible spectroscopy--synthesis (chemical)
Аннотация: Structural and morphological properties of biogenic ferrihydrite nanoparticles produced by bacteria Klebsiella oxytoca are investigated. The stability of water dispersions of biomineral particles produced by Klebsiella oxytoca was monitored by UV-Vis spectroscopy. Their chemical composition was determined by FT-IR spectroscopy. The vibrational spectra of biogenic ferrihydrite nanoparticles revealed typical absorption peaks of exopolysaccharides. Morphological analysis based on Raman spectroscopy indicated the presence of exopolysaccharides on the surface as well as inside the pores of the ferrihydrite nanoparticles. Structural investigations of ultrasonic assisted samples of different concentration of water dispersed particles were performed using small angle X-ray scattering analysis. Model calculations and fitting procedures revealed scattering objects of an elongated shape with 6.73В±0.16 nm radius of gyration. В© Published under licence by IOP Publishing Ltd.
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15.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Balasoiu M., Kichanov S., Pantelica A., Pantelica D., Stolyar S. V., Iskhakov R. S., Aranghel D., Ionescu P., Badita C. R., Kurkin S., Orelovich O., Tiutiunikov S.
Заглавие : Characterization of biogenic ferrihydrite nanoparticles by means of SAXS, SRD and IBA methods
Коллективы : International School and Workshop on Complex and Magnetic Soft Matter Systems: Structure and Physico - Mechanical Properties
Место публикации : J. Phys.: Conf. Ser. - 2018. - Vol. 994: 3rd International School and Workshop on Complex and Magnetic Soft Matter Systems: Structure and Physico - Mechanical Properties, CMSMS 2017 (28 - 30 June 2017), Is. 1. - Ст.012012. - , DOI 10.1088/1742-6596/994/1/012012
Примечания : Cited References: 20. - The work was accomplished in the frame of IFIN-HH User Beam schedule at the 3 MV Tandetron accelerator and partially was supported by the Joint Institute for Nuclear Research (JINR) Dubna Theme No. 04-4-1121-2015/2017, RO-JINR Projects Nos. 95/15.02.2016 and 96/15.02.2016, items 77, 82; Nos. 219/10.04.2017 and 220/10.04.2017 item 38; RFBR and Krasnoyarsk region Project No. 17-43-240527. Support by the Special Program for Siberian Federal University of the Ministry of Education and Science of the Russian Federation is acknowledged.
Ключевые слова (''Своб.индексиров.''): bacteria--data handling--ion beams--mechanical properties--nanoparticles--synchrotron radiation
Аннотация: Investigations of biogenic ferrihydrite nanoparticles produced by bacteria Klebsiella oxytoca by applying small angle X-ray scattering, synchrotron radiation diffraction and ion beam analysis methods are reviewed. Different experimental data processing methods are used and analyzed.
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16.

Вид документа : Однотомное издание
Шифр издания :
Автор(ы) : Kim P. D., Turpanov I. A., Stolyar S. V., Yushkov V. I., Khalyapin D. L.
Заглавие : Co/Pt multilayer structures on he crystal MgO and Si substrate as a media for perpendicular magnetic recording
Место публикации : The Physics of Metals and Metallography. - 2006. - Vol. 102, Suppl. 1. - P.S83-S85. - DOI 10.1134/S0031918X06140213
Примечания : Библиогр.: 6
Аннотация: In this work, the crystal structure and hysteretic magnetic properties of equiatomic single-crystal CoPt/MgO films prepared by magnetron sputtering and their modifications after heat treatment are studied. A perpendicular magnetic anisotropy is obtained in annealed films in a film thickness range of 2 d≤16 nm. The correlation between the magnitude of magnetocrystalline anisotropy constant of CoPt films and the order parameter of the L10 superstructure of these alloys is ascertained. The influence of the single-crystal MgO substrate on the structure and magnetic properties of the films of equiatomic CoPt alloys is also investigated.
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Stolyar S. V., Yaroslavtsev R. N., Chekanova L. A., Komogortsev S. V., Cheremiskina E. V., Neznakhin D. S., Iskhakov R. S.
Заглавие : CoC films sinthezited whis arabinogalactan
Коллективы : Nanostructures: Physics and Technology, International Symposium, Институт физики им. Б. И. Степанова НАН Беларуси, Санкт-Петербургский национальный исследовательский Академический университет Российской академии наук, Физико-технический институт им. А.Ф. Иоффе РАН, Научно-технологический центр микроэлектроники и субмикронных гетероструктур Российской академии наук
Место публикации : Nanostructures: Physics and Technology, International Symposium (28 ; 2020 ; 28 Sept.-2 Oct. ; Minsk, Belarus). Nanostructures: physics and technology: proc. 28th Int. symp. - 2020. - Ст.NT.19. - P.105-106. - ISBN 978-5-93634-066-6
Примечания : Cited References: 1
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Yaroslavtsev R. N., Ladygina V. P., Balaev D. A., Pankrats A. I., Iskhakov R. S.
Заглавие : Collective Spin Glass State in Nanoscale Particles of Ferrihydrite
Коллективы : International Symposium “Nanostructures: Physics and Technology”
Место публикации : Semiconductors. - 2020. - Vol. 54, Is. 12. - P.1710-1712. - DOI 10.1134/S1063782620120362
Примечания : Cited References: 16. - This work was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, the Krasnoyarsk Regional Fund for the Support of Scientific and Technical Activities (project no. 19-42-240012 r_a “Magnetic resonance in ferrihydrite nanoparticles: Effects associated with the “core–shell” structure). This work was supported by a grant from the President of the Russian Federation for state support of young Russian scientists – candidates of sciences no. MK-1263.2020.3
Аннотация: Ferromagnetic resonance was used to study three types of ferrihydrite nanoparticles: nanoparticles formed as a result of the cultivation of microorganisms Klebsiella oxytoca; chemically prepared ferrihydrite nanoparticles; chemically prepared ferrihydrite nanoparticles doped with Cu. It is established from the ferromagnetic resonance data that the frequency-field dependence (in the temperature range ТP ‹ T ‹ T*) is described by the expression: 2πν/γ ⁼ НR + HA(T = 0)(1 – T/Т*), where γ is the gyromagnetic ratio, HR is the resonance field. The induced anisotropy HA is due to the spin-glass state of the near-surface regions. TP temperature characterizes the energy of the interparticle interaction of nanoparticles.
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Komogortsev S. V., Stolyar S. V., Iskhakov R. S., Mohov A. A.
Заглавие : Core-shell exchange interaction effect in the approach to magnetic saturation of a magnetite-like nanoparticle
Коллективы : International Baltic Conference on Magnetism, Балтийский федеральный университет им. И. Канта
Место публикации : V International Baltic Conference on Magnetism. IBCM: Book of abstracts. - 2023. - P.40
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Chekanova L. A., Yaroslavtsev R. N., Ladygina V. P., Tirranen L. S.
Заглавие : Effect of nanoparticles in growth of test - bacteria
Коллективы : International Scientific Conference "Conference on Applied Physics, Information Technologies and Engineering"
Место публикации : J. Phys. Conf. Ser. - 2019. - Vol. 1399. - Ст.022029. - ISSN 1742-6588, DOI 10.1088/1742-6596/1399/2/022029. - ISSN 1742-6596 (eISSN)
Примечания : Cited References: 10
Предметные рубрики: Applied Physics
Аннотация: Confident effect of five magnetic composite nanoparticles (FeP@Ag, FeP@Pd, CoP, NiP, Fe2O3@AГ) on growth of test bacteria colonies (Acinetobacter baumannii, Еscherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Staphylococcus aureus) in five replicates each is considered. Reliable inhibitors of colonies of all five test bacteria were nanoparticles FeP@Ag. CoP nanoparticles are reliable inhibitors of growth of 4 test bacteria (except for test bacteria Escherichia сoli). NiP nanoparticles are reliable inhibitors of growth of 2 test bacteria: Escherichia сoli and Klebsiella pneumoniae. Bacteria Escherichia сoli were most sensitive to the effect of magnetic nanoparticles; and bacteria Pseudomonas aeruginosa and Staphylococcus aureus were most resistant to the effect of magnetic nanoparticles. The prospects of the method are in the possibility of multiple reuse of the magnetic particles with antimicrobial properties for bacterial decontamination of the studied sources of water and removal of magnetic nanoparticles from the treated liquids by electromagnet. The method can find use in water treatment facilities for household, Industrial and medical wastes.
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