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Каталог книг и брошюр библиотеки ИФ СО РАН

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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Grishina, Svetlana, Kodera, Peter, Goryainov, Sergey, Oreshonkov A. S., Seryotkin, Yurii, Simko, Frantisek, Polozov, Alexander G.
Заглавие : Application of Raman spectroscopy for identification of rinneite (K3NaFeCl6) in inclusions in minerals
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-05-00682]; European Regional Development FundEuropean Union (EU) [ITMS 26240220086]; Vedecka Grantova Agentura MSVVaS SR a SAV [1/0313/20]
Место публикации : J. Raman Spectrosc. - 2020. - Vol. 51, Is. 12. - P.2505-2516. - ISSN 0377-0486, DOI 10.1002/jrs.6005. - ISSN 1097-4555(eISSN)
Примечания : Cited References: 55. - Russian Foundation for Basic Research, Grant/Award Numbers: 18-05-00682, 18-05-00682; European Regional Development Fund, Grant/Award Number: ITMS 26240220086; Vedecka Grantova Agentura MSVVaS SR a SAV, Grant/Award Number: 1/0313/20
Предметные рубрики: SALT MELT
IRON
DEPOSIT
FLUIDS
TRANSFORMATIONS
FERRIHYDRITE
Аннотация: Solid daughter phases in fluid and salt melt inclusions in minerals provide important clues to characterization of mineral‐forming processes. The analysis of the fluid inclusions often requires the exposure of the daughter minerals. Rinneite (K3NaFeCl6), which is a hygroscopic mineral, decomposes in air and cannot thus be identified by conventional methods. A combined approach has been applied for investigation of synthetic and natural rinneite to acquire its diagnostic Raman spectrum for a nondestructive identification. We used natural rinneite inclusions in halite, suitable for applying a complex of methods, to clear up the reference spectrum. Improved high‐resolution X‐ray diffraction (XRD) data obtained from natural rinneite inclusion are comparable with that of previously published, with similar unit cell dimensions. Polarized Raman spectra of natural inclusions were obtained using different geometries and polarization of the incident and scattered light. Interpretation of experimental Raman spectra was performed within the framework of lattice dynamics simulations and group analysis. Individual spectral bands are interpreted in terms of Raman‐active vibrational modes of K3NaFeCl6 structural units. Raman spectrum of synthetic rinneite with main peaks at 75, 91, 103, 143, 167, 171, 187, and 239 cm−1 agrees well with the spectra of rinneite inclusions in halite from the Nepa potash deposit and rinneite daughter minerals in salt melt inclusions hosted by quartz veinlets from the porphyry gold systems in the Central Slovakia Volcanic Field. This provides a firm basis for any future identification of this mineral worldwide, using nondestructive Raman spectroscopy.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Komogortsev S. V., Balaev D. A., Krasikov A. A., Stolyar S. V., Yaroslavtsev R. N., Iskhakov R. S.
Заглавие : Magnetic Hysteresis of Blocked Ferrihydrite Nanoparticles
Коллективы : Annual conference on мagnetism and мagnetic мaterials
Место публикации : 65th Annual conference on мagnetism and мagnetic мaterials (MMM-2020): abstract book. - 2020. - Ст.C4-02. - P.74
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chilom C. G., Sandu N., Balasoiu M., Yaroslavtsev R. N., Stolyar S. V., Rogachev A. V.
Заглавие : Ferrihydrite nanoparticles insights: Structural characterization, lactate dehydrogenase binding and virtual screening assay
Место публикации : Int. J. Biol. Macromol. - 2020. - Vol. 164. - P.3559-3567. - ISSN 01418130 (ISSN), DOI 10.1016/j.ijbiomac.2020.08.242
Примечания : Cited References: 64. - The work was accomplished in the frame of JINR Themes 02-1-1107-2011/2021, 04-5-1131-2017/2021 and 04-4-1121-2015/2020 and with the financial support of the RO-JINR Projects Nos. 268/21.05.2020 items 8 and 77, and 269/21.05.2020 items 11 and – 80. MB acknowledges Dr. Alexander Kuklin for assistance for SANS measurements and fruitful discussions. The authors acknowledge Dr. George Stan of the National Institute of Materials Physics for facilitating the conduct of FTIR experiments
Аннотация: The binding between the enzyme lactate dehydrogenase (LDH) and ferrihydrite nanoparticles (Fh-NPs) was investigated by means of small-angle neutron scattering (SANS), Fourier-transform infrared (FTIR) spectroscopy, fluorescence and Forster resonance energy transfer (FRET) and molecular docking. Fh-NPs - LDH compounds of dimensions under 100 nm are formed. The conformational changes and the mechanism of interaction between LDH and Fh-NPs simple and doped with Cu and Co, and the effect of these NPs on the thermal denaturation of LDH were monitored. The quenching mechanism is static, the binding occurring with moderate affinity, being mainly driven by hydrogen bonding and van der Waals forces. FRET occurs at a minimal distance of 2.55 nm. Thermal denaturation of LDH in the presence of simple and doped Fh-NPs shows that the thermodynamic parameters of protein unfolding are significantly changed with temperature. The denaturation temperature of LDH shifts to higher values in the presence of all Fh-NPs, than in the case of simple LDH. The docking approach estimates the energy corresponding to the best fit of the ferrihydrite in the LDH binding site near Trp. These results have direct implications on the uses of the complex of LDH with Fh-NPs in various biochemical, biological, or clinical applications.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Knyazev Yu. V., Balaev D. A., Stolyar S. V., Bayukov O. A., Yaroslavtsev R. N., Ladygina V. P., Velikanov D. A., Iskhakov R. S.
Заглавие : Magnetic anisotropy and core-shell structure origin of the biogenic ferrihydrite nanoparticles
Место публикации : J. Alloys Compd. - 2021. - Vol. 851. - Ст.156753. - ISSN 09258388 (ISSN), DOI 10.1016/j.jallcom.2020.156753
Примечания : Cited References: 82. - The electron microscopy study was carried out on the equipment of the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences. This study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R & D Activities, project no. 19-42-240012 p-a “Magnetic Resonance in Ferrihydrite Nanoparticles: Effects Related to the Core–Shell Structure”
Аннотация: Ferrihydrite is a low-crystalline nanoscale matter. The uncompensated magnetic moment of the ferrihydrite caused by the antiferromagnetic ordering of the magnetic moments of iron atoms and leads to the magnetic properties very similar to those of ferro- and ferrimagnetic nanoparticles. In this study, we investigated the biogenic ferrihydrite nanoparticles with the narrow size distribution and an average diameter of ≈2 nm obtained by the bacteria life cycle. The features caused by the surface effects and the inhomogeneous structure of ferrihydrite have been examined in the temperature range of 4–300 K using Mossbauer spectroscopy and magnetometry. Based on the Mossbauer data, we identified the superparamagnetic blocking temperature at the temperature of 30 K for the largest ferryhidrite particles. We established that the exceptional magnetic anisotropy of ferrihydrite (KV=1.2∙105 erg/cm3 and KS=0.1 erg/cm2) is reached because of the highly developed ferrihydrite nanoparticles’ surface. According to the Mossbauer data, we propose a core-shell structural model of the biogenic ferrihydrite particles. We found that the size of the dense core depends on the particle size. The well-crystallized core is formed only for nanoparticles larger than ≈2 nm, whereas smaller particles consist entirely of a matter with a lower density of iron atoms.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Ladygina V. P., Boldyreva A. V., Kolenchukova O. A., Vorotynov A. M., Bairmani M. S., Yaroslavtsev R. N., Iskhakov R. S.
Заглавие : Synthesis, Properties, and in vivo Testing of Biogenic Ferrihydrite Nanoparticles
Место публикации : Bull. Russ. Acad. Sci. Phys. - 2020. - Vol. 84, Is. 11. - P.1366-1369. - ISSN 10628738 (ISSN), DOI 10.3103/S106287382011026X
Примечания : Cited References: 12. - The study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk krai, 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”), and the grant of the President of the Russian Federation for state support of young Russian scientists—Candidates of sciences no. MK-1263.2020.3
Аннотация: A sol containing biogenic ferrihydrite nanoparticles is obtained by cultivating Klebsiella oxytoca microorganisms. Data on the physical properties of the biogenic ferrihydrite and its effect on the organism of laboratory animals are obtained using a model of experimental hemolytic anemia, according to indicators of the functional activity of erythrocytes and morphological descriptions of organs.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Balaev D. A., Krasikov A. A., Stolyar S. V., Yaroslavtsev R. N., Ladygina V. P., Iskhakov R. S.
Заглавие : Magnetic hysteresis of blocked ferrihydrite nanoparticles
Место публикации : AIP Adv. - 2021. - Vol. 11, Is. 1. - Ст.015329. - ISSN 21583226 (ISSN), DOI 10.1063/9.0000111
Примечания : Cited References: 23. - The magnetic measurements were partially carried out on the equipment of the Krasnoyarsk Regional Center for Collective Use, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences. This study was supported 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)
Аннотация: Using minor hysteresis loops in the Stoner-Wohlfarth model allows describing the experimental behavior of the coercive force of minor hysteresis loops in ferrihydrite nanoparticles with a change in the field amplitude. The description allows estimating the parameters of the distribution of the magnetic anisotropy field in nanoparticles. The best agreement of the anisotropy fields estimated by different approaches is achieved for the assumption of uniaxial anisotropy in ferrihydrite nanoparticles.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Stolyar S. V., Ladygina V. P., Balaev D. A., Pankrats A. I., Knyazev Yu. V., Yaroslavtsev R. N., Iskhakov R. S.
Заглавие : Magnetic resonances in nanoscale particles od ferrihydrite
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.SRPN.13. - P.198-199. - ISBN 978-5-93634-066-6
Примечания : Cited References: 14
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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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Krasikov A. A., Balaev A. D., Stolyar S. V., Ladygina V. P., Iskhakov R. S.
Заглавие : Features of relaxation of the remanent magnetization of antiferromagnetic nanoparticles by the example of ferrihydrite
Место публикации : Phys. Solid State. - 2020. - Vol. 62, Is. 7. - P.1172-1178. - ISSN 10637834 (ISSN), DOI 10.1134/S1063783420070033
Примечания : Cited References: 53
Аннотация: The relaxation of the remanent magnetization of antiferromagnetically ordered ferrihydrite nanoparticles at the exchange bias effect implemented in these systems has been investigated. The magnetization relaxation depends logarithmically on time, which is typical of the thermally activated hoppings of particle magnetic moments through the potential barriers caused by the magnetic anisotropy. The barrier energy obtained by processing of the remanent magnetization relaxation data under the field cooling conditions significantly exceeds the barrier energy under standard (zero field cooling) conditions. The observed difference points out the possibility of using the remanent magnetization relaxation to analyze the mechanisms responsible for the exchange bias effect in antiferromagnetic nanoparticles and measure the parameters of the exchange coupling of magnetic subsystems in such objects.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kichanov S., Pantelica A., Pantelica D., Stolyar S. V., Iskhakov R. S., Aranghel D., Ionescu P., Vladoiu R., Balasoiu M.
Заглавие : Structural and compositional specifications on biogenic ferrihydrite nanoparticles production by Klebsiella oxytoca
Коллективы : Joint Institute for Nuclear Research Project [04-4-1121-2015/2017]; RO-JINR Projects [95/15.02.2016, 96/15.02.2016, 77, 82]; Krasnoyarsk region [17-43-240527]; Special Program for Siberian Federal University of the Ministry of Education and Science of the Russian Federation; RFBR
Место публикации : Rom. Rep. Phys. - 2018. - Vol. 70, Is. 4. - Ст.511. - ISSN 1221-1451. - ISSN 1841-8759(eISSN)
Примечания : Cited References: 17. - This work was supported by the Joint Institute for Nuclear Research Project No. 04-4-1121-2015/2017, and RO-JINR Projects Nos. 95/15.02.2016 and 96/15.02.2016, items 77, 82 and was funded by RFBR and Krasnoyarsk region according to the research 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.
Предметные рубрики: MAGNETIC-PROPERTIES
Ключевые слова (''Своб.индексиров.''): biogenic ferrihydrite--nanoparticles structure--synchrotron radiation--powder diffraction--pixe--pige--rbs
Аннотация: Investigations of biogenic ferrihydrite nanoparticles produced by bacteria Klebsiella oxytoca by applying methods of synchrotron radiation powder diffraction, particle-induced X-ray emission (PIXE), proton induced gamma-emission (PIGE) and proton Rutherford backscattering (RBS) are reported and discussed.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Bayukov O. A., Yaroslavtsev R. N., Knyazev Yu. V., Ladygina V. P., Gerasimova Y. V., Iskhakov R. S.
Заглавие : Ion reduction in iron oxide and oxyhydroxide nanoparticles during ultrasonic treatment
Место публикации : Adv. Powder Technol. - 2019. - Vol. 30, Is. 11. - P.2620-2625. - ISSN 09218831 (ISSN), DOI 10.1016/j.apt.2019.08.009
Примечания : Cited References: 30. - The reported study was carried out with the financial support of the Russian Foundation for Fundamental Research , the Government of the Krasnoyarsk Territory , the Krasnoyarsk Territory Fund for Support of Scientific and Technical Activity in the framework of scientific Projects No. 18-43-243003 and No. 18-42-243011 . The work is supported by the Special Program of the Ministry of Education and Science of the Russian Federation for the Siberian Federal University.
Аннотация: The effect of ultrasonic treatment of iron oxide and iron oxyhydroxide nanoparticles (ferrihydrite nanoparticles synthesized by Klebsiella oxytoca microorganisms, ferrihydrite nanoparticles synthesized by a chemical method and hematite nanoparticles) is studied. Samples of nanoparticles were investigated using transmission electron microscopy, Mossbauer spectroscopy and X-ray diffraction methods. The formation of the ?-Fe metal phase from nanoparticles of iron oxides and iron oxyhydroxides was detected. The metal phase is formed as a result of the reduction of iron ions during cavitation treatment. According to the experimental results, the presence of a protein or a polysaccharide component is necessary for the course of this reaction.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Krasikov A. A., Velikanov D. A., Popkov S. I., Dubynin N. V., Stolyar S. V., Ladygina V. P., Yaroslavtsev R. N.
Заглавие : Pulsed field-induced magnetization switching in antiferromagnetic ferrihydrite nanoparticles
Коллективы : Russian Foundation for Basic Research; Government of the Krasnoyarsk Territory; Krasnoyarsk Territorial Foundation for Support of Scientific and RD Activities [17-42-240138]
Место публикации : Phys. Solid State. - 2018. - Vol. 60, Is. 10. - P.1973-1978. - ISSN 1063-7834, DOI 10.1134/S1063783418100025. - ISSN 1090-6460(eISSN)
Примечания : Cited References: 38. - This study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 17-42-240138.
Предметные рубрики: BACTERIAL FERRIHYDRITE
NIO NANOPARTICLES
250 KOE
HYSTERESIS
Аннотация: The dynamic magnetization switching of ferrihydrite nanoparticles has been investigated by a pulsed magnetometer technique in maximum fields H-max of up to 130 kOe with pulse lengths of 4, 8, and 16 ms. Ferrihydrite exhibits antiferromagnetic ordering and defects cause the uncompensated magnetic moment in nanoparticles; therefore, the behavior typical of magnetic nanoparticles is observed. The dynamic hysteresis loops measured under the above-mentioned conditions show that the use of pulsed fields significantly broadens the temperature region of existence of the magnetic hysteresis and the coercivity can be governed by varying the maximum field and pulse length. This behavior is resulted from the relaxation effects typical of conventional ferro- and ferrimagnetic nanoparticles and the features typical of antiferromagnetic nanoparticles.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bopp V. L., Mistratova N. A., Petrakovskaya E. A., Gurevich Y. L., Teremova M. I., Khlebopros R. G.
Заглавие : The influence of nanoparticles of biogenic ferrihydrite on the rooting of lignified cuttings of the Ledebour willow
Место публикации : Biophysics. - 2018. - Vol. 63, Is. 4. - P.621-628. - ISSN 00063509 (ISSN), DOI 10.1134/S0006350918040036
Примечания : Cited References: 38. - This study was supported by the Russian Foundation for Basic Research, the Government of the Kras-noyarsk krai, and the Krasnoyarsk regional foundation for support of scientific and technical activities under the research project no. 16-48-242158.
Аннотация: The influence of nanoparticles of biogenic ferrihydrite on the root formation of lignified cuttings of the Ledebour willow (Salix ledebouriana Trautv.) was investigated. The rooting of stem cuttings was performed in water using a phytohormone (indoyl-3-acetic acid) and nanoparticles. In comparison with the variants of incubation of cuttings in water and in a solution containing indolyl-3-acetic acid, the number and total length of the adventitious roots after 5 and 15 days of rooting were greatest in the cuttings treated with nanoparticles. In the early period of root development, increased levels of free radicals and intensities of the hyperfine structure lines of Mn2+ cleavage were recorded in the EPR spectra of plant tissues (lenticels of cuttings of treated with nanoparticles). The latter is related to the activity of manganese-containing superoxide dismutase. The response of cuttings to the treatment with nanoparticles was recorded by EPR before manifestation of adventitious root primordium initiation and development.
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14.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Bopp V. L., Mistratova N. A., Petrakovskaya E. A., Teremova M. I., Gurevich Yu. L.
Заглавие : The use of biogenic nanoparticles of ferrihydrite in the propagation of horticultural crops by cutting
Коллективы : International Scientific Conference on Agribusiness, Environmental Engineering and Biotechnologies
Место публикации : International Scientific Conference on Agribusiness, Environmental Engineering and Biotechnologies (2nd ; 2019 ; 13-14 Nov. ; Krasnoyarsk). IOP Conference Series: Earth and Environmental Science. - 2020. - Vol. 421, Is. 6. - Ст.062014. - , DOI 10.1088/1755-1315/421/6/062014
Примечания : Cited References: 16
Аннотация: The effect of biogenic ferrihydrite nanoparticles on the rhizogenesis of garden plants (Salix ledebouriana, Philadelphus coronarius, Thuja occidentalis, and Cerasus fruticosa) was studied. It was shown that nanoparticles of biogenic ferrihydrite (tested 4 modifications) are biologically active. It is assumed that the mechanism of their influence on the rhizogenesis of the tested plant species is general and is associated with the generation of reactive oxygen species in interaction with endogenous hydrogen peroxide.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Balaev D. A., Ladygina V. P., Pankrats A. I., Yaroslavtsev R. N., Velikanov D. A., Iskhakov R. S.
Заглавие : Ferromagnetic resonance study of biogenic ferrihydrite nanoparticles: spin-glass state of surface spins
Место публикации : JETP Letters. - 2020. - Vol. 111, Is. 3. - P.183-187. - ISSN 0021-3640, DOI 10.1134/S0021364020030145. - ISSN 1090-6487(eISSN)
Примечания : Cited References: 41. - This work was supported by the Russian Foundation for Basic Research, project no. 18-02-40137.This work was supported by the Russian Foundation for Basic Research, by the Government of Krasnoyarsk krai, by 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”), 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).
Предметные рубрики: MAGNETIC-PROPERTIES
NIO NANOPARTICLES
TRANSITION
ANISOTROPY
Аннотация: Ferrihydrite nanoparticles (2–3 nm in size), which are products of the vital activity of microorganisms, are studied by the ferromagnetic resonance method. The “core” of ferrihydrite particles is ordered antiferromagnetically, and the presence of defects leads to the appearance of an uncompensated magnetic moment in nanoparticles and the characteristic superparamagnetic behavior. It is established from the ferromagnetic resonance data that the field dependence of the frequency is described by the expression 2πν/γ = HR + H A(T=0) (1 − T/T*), where γ is the gyromagnetic ratio, HR is the resonance field, HA ≈ 7 kOe, and T* ≈ 50 K. The induced anisotropy HA is due to the spin-glass state of the near-surface regions.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chilom, Claudia G., Zorilă, Bogdan, Bacalum M., Bălăşoiu, Maria, Yaroslavtsev R. N., Stolyar S. V., Tyutyunnicov, Sergey
Заглавие : Ferrihydrite nanoparticles interaction with model lipid membranes.
Место публикации : Chem. Phys. Lipids. - 2020. - Vol. 226. - Ст.104851. - ISSN 0009-3084, DOI 10.1016/j.chemphyslip.2019.104851. - ISSN 1873-2941 (eISSN)
Примечания : Cited References: 70. - The work was accomplished with the financial support of the 2019 RO-JINR Project Investigation of biogenic and chemically synthesized systems in interaction with biostructures for applied research, Theme 02-1-1107-2011/2019 and of the Romanian National Authority for Scientific Research, CNDI-UEFISCDI, Project numbers: PN 18 09 02 02/2018 and PN 19 06 02 03/2019. The authors are very much indebted to Professor Dr. Aurel Popescu, for very helpful suggestions and permanent encouragement.
Аннотация: In recent years was observed an increased interest towards the use of metal nanoparticles for various biomedical applications, such as therapeutics, delivery systems or imaging. As biological membranes are the first structures with which the nanoparticles interact, it is necessary to understand better the mechanisms governing these interactions. In the present paper we aim to characterize the effect of three different ferrihydrite nanoparticles (simple or doped with cooper or cobalt) on the fluidity of model lipid membranes. First we evaluated the physicochemical properties of the nanoparticles: size and composition. Secondly, their effect on lipid membranes was also evaluated using Laurdan, TMA-DPH and DPH fluorescence. Our results can help better understand the mechanisms involved in nanoparticles and membrane interactions.
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Stolyar S. V., Ladygina V. P., Balaev D. A., Pankrats A. I., Yaroslavtsev R. N., Iskhakov R. S.
Заглавие : Magnetic resonances in nanoscale particles of biogenic ferrihydrite
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст.M.P9. - P.502-503. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: 5. - The reported study was carried out with the financial support of the Russian Foundation for Fundamental Research, the Government of the Krasnoyarsk Territory, the Krasnoyarsk Territory Fund for Support of Scientific and Technical Activity in the framework of scientific Project No. 18 43-243003. The work is supported by the Special Program of the Ministry of Education and Science of the Russian Federation for the Siberian Federal University
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Kolenchukova O. A., Boldyreva A. V., Kudryasheva N. S., Gerasimova Yu. V., Krasikov A. A., Yaroslavtsev R. N., Bayukov O. A., Ladygina V. P., Birukova E. 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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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Balaev D. A., Skorobogatov S. A., Velikanov D. A., Bayukov O. A., Stolyar S. V., Yaroslavtsev R. N., Iskhakov R. S., Knyazev Yu. V.
Заглавие : Superparamagnetic relaxation in ensembles og ultrasmall ferrihydrite nanoparticles
Коллективы : Байкальская международная конференция "Магнитные материалы. Новые технологии", "Магнитные материалы. Новые технологии", Байкальская международная конференция, "Magnetic materials. New tecnologies", Baikal International Conference, Иркутский государственный университет
Место публикации : Магнитные материалы. Новые технологии: тез. докл. IX Байкал. междунар. конф. BICMM-2023/ чл. прогр. ком.: S. S. Aplesnin [et al.] ; чл. орг. ком. R. S. Iskhakov [et al.]. - Иркутск, 2023. - P.92. - ISBN 978-5-962402178-0
Примечания : Библиогр.: 1
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Krasikov A. A., Knyazev Yu. V., Yaroslavtsev R. N., Velikanov D. A., Mikhlin Yu. L., Volochaev M. N., Bayukov O. A., Ladygina V. P., Stolyar S. V., Iskhakov R. S.
Заглавие : Magnetic collective state formation upon tuning the interparticle interactions in ensembles of ultrafine ferrihydrite nanoparticles
Колич.характеристики :13 с
Место публикации : Nano-Struct. Nano-Objects. - 2024. - Vol. 37. - Ст.101089. - ISSN 2352507X (ISSN), DOI 10.1016/j.nanoso.2023.101089. - ISSN 23525088 (eISSN)
Примечания : Cited References: 93. - The authors thank M.N. Volochaev for the TEM investigations
Аннотация: The results of a study of the dynamic (alternating current magnetic susceptibility) and static magnetic properties, as well as 57Fe Mössbauer spectrometry and ferromagnetic resonance of two-line ferrihydrite nanoparticle systems with varying intensities of magnetic interparticle interactions are reported. The strength of the magnetic interparticle interactions has been tuned by coating (with various degrees of coating) the ferrihydrite particles (2–4 nm in size and an average size ∼2.7 nm) of the initial synthetic sample by arabinogalactan. Also, a biogenic ferrihydrite sample (an average particle size of 2-nm) with a natural organic coating was studied and it has the weakest magnetic interparticle interactions among of all the samples. Relaxation times of the particle’s magnetic moment were determined by the data of static and dynamic magnetic susceptibilities and from analysis of 57Fe Mössbauer spectrometry. Based on the temperature dependences of the relaxation times, it has been concluded that the predominantly collective processes of freezing of the particle magnetic moments occur under the action of the magnetic interparticle interactions. It is shown that an important role in these processes is played by a magnetic subsystem of the surface spins of the particles. The effect of the interplay between the surface spin and magnetic moment subsystems on the static magnetic properties (low-temperature magnetic hysteresis loops) and the parameters of the microwave absorption line under the magnetic resonance conditions is discussed.
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