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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fomenko E. V., Akimochkina G. V., Anshits A. G., Fadeeva N. P., Kharchenko I. A., Elsuf’ev E. V., Shabanova K. A., Maksimova A. A., Ryzhkov I. I.
Заглавие : Ceramic substrates for filtration membranes based on fine fly ash microspheres
Колич.характеристики :13 с
Место публикации : Membr. Membr. Technol. - 2024. - Vol. 6, Is. 2. - P.71-83. - ISSN 25177516 (ISSN), DOI 10.1134/S2517751624020033. - ISSN 25177524 (eISSN)
Примечания : Cited References: 58. - The work was carried out with the support of the Russian Science Foundation, project no. 23-19-00269, using the equipment of the Krasnoyarsk Regional Center for Collective Use at the Krasnoyarsk Federal Research Center of the Siberian Branch of the Russian Academy of Sciences
Аннотация: A procedure has been proposed for producing ceramic substrates for filtration membranes based on a narrow fraction of fine fly ash microspheres using cold uniaxial pressing followed by high-temperature firing. It has been shown that increasing the sintering temperature from 1000 to 1150°C leads to a decrease in open porosity from 40 to 24%, a decrease in the average pore size from 1.60 to 0.34 μm, and an increase in the compressive strength from 9.5 to 159 MPa. The resulting substrates are characterized by water permeability values of 1210, 310, 240, 170 L m−2 h−1 bar−1 at sintering temperatures of 1000, 1050, 1100 and 1150°C, respectively. Experiments on filtration of aqueous suspensions of fine microspheres (dav = 2.5 µm) and microsilica (dav = 1.9 μm) through a substrate produced at a sintering temperature of 1150°C have shown the rejection close to 100%. The proposed methodology for using ash waste in the production of membrane materials promotes the development of technologies for the integrated processing of thermal energy waste.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Semina P. N., Isaev I. L., Komogortsev S. V., Klyuchantsev A. B., Kostyukov A. S., Blagodatova A. V., Khrennikov D. E., Kichkailo A. S., Zamay T. N., Lapin I. N., Sokolov A. Е., Polyutov S. P., Karpov S. V.
Заглавие : Towards understanding the triggering of the malignant cell death in high-efficiency magneto-mechanical anticancer therapy
Место публикации : J. Phys. D. - 2023. - Vol. 56, Is. 6. - Ст.065401. - ISSN 00223727 (ISSN), DOI 10.1088/1361-6463/acb0dd. - ISSN 13616463 (eISSN)
Примечания : Cited References: 146. - P N S, A S K, D E K, S P P, S V K acknowledge the support by the Ministry of Science and High Education of Russian Federation (Project No. FSRZ-2020-0008). Experimental analyses were funded by the Ministry of Science and Higher Education of the Russian Federation (Project FWES-2022-0005) – A S K, T N Z. The authors thank Dr S V Saikova for providing the TEM image in figure (b)
Аннотация: The paper discusses schemes for the implementation of magneto-mechanical anticancer therapy and the most probable scenarios of damaging mechanical effects on the membranes of malignant cells by targeted magnetic nanoparticles selectively bound to membrane mechanoreceptors employing aptamers. The conditions for selective triggering of the malignant cell apoptosis in a low-frequency non-heating alternating magnetic field, corresponding to the exceeding threshold value of the force acting on the membrane and its mechanoreceptors, are established using a nanoparticle dynamic simulation. The requirements for the functionality of magnetic nanoparticles and their suitability for biomedical applications are analysed. Attention is paid to the possibility of the formation of magnetite nanoparticle aggregates in an external magnetic field and their localization near tumor cell membranes. It is shown that the scenario involving the process of aggregation of magnetite nanoparticles provides a sufficient magneto-mechanical impact to achieve a therapeutic effect. A possible explanation for the experimentally established fact of successful application of magneto-mechanical therapy using magnetite nanoparticles is presented, in which complete suppression of the Ehrlich carcinoma in an alternating magnetic field as a response to a magnetome-chanical stimulus was demonstrated. This result confirmed the possibility of using the method for high efficiency treatment of malignant neoplasms. The paper is provided with an extensive review of key publications and the state of art in this area.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kostyukov A. S., Isaev I. L., Ershov A. E., Gerasimov V. S., Polyutov S. P., Karpov S. V.
Заглавие : Part II. Nanobubbles around plasmonic nanoparticles in terms of modern simulation modeling: what makes them kill the malignant cells?
Коллективы : Ministry of Science and High Education of Russian Federation [FSRZ-2020-0008]; RFBRRussian Foundation for Basic Research (RFBR); Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science [20-42-240003]
Место публикации : J. Phys. D. - 2022. - Vol. 55, Is. 17. - Ст.175402. - ISSN 0022-3727, DOI 10.1088/1361-6463/ac4c1f. - ISSN 1361-6463(eISSN)
Примечания : Cited References: 49. - The research was supported by the Ministry of Science and High Education of Russian Federation (Project No. FSRZ-2020-0008), and was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, Project No. 20-42-240003
Предметные рубрики: STRESS WAVES
LASER
MEMBRANE
DAMAGE
DEATH
LYSIS
Аннотация: We have established numerically the physical pattern and conditions for formation of nanosized bubbles in aqueous medium around biocompatible plasmonic nanoparticles (NPs) selectively bound to the membrane of the malignant cells by means of DNA-aptamers under the action of picosecond laser radiation. The results obtained are based on the finite volume method and hydrodynamic models underlying the ANSYS Fluent package with extended capabilities. We have found the main features and previously unknown dominant factors of the damage effect on the cell membrane at the moment of the bubble nucleation around the plasmonic NPs of different types taking into account the influence of the closely located membrane. Information on the kinetics of spatial distribution of pressure, temperature and the relative proportion of vapor in the 'nanoparticle-membrane-medium' system have been obtained. The attention is drawn to the advantages of using biocompatible, perfectly absorbing core–shell plasmonic NPs for anti-tumor therapy characterized by an increased mechanical effect on malignant cell membranes at lower laser radiation intensity and the spectral position of their plasmon resonance (λ = 700 nm) in the hemoglobin transparency range. This ensures penetration of laser radiation deep into tissues. The paper is provided with an extensive review of key publications and the state-of-art in this area.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Khaydarov R., Gapurova O., Abdukhakimov M., Sadikov I., Garipov I., Krishnamurthy P. T., Zharkov S. M., Zeer G. M., Abolentseva P. A., Prudnikova S. V., Evgrafova S. Y.
Заглавие : Antimicrobial properties of nanofiltration membranes modified with silver nanoparticles
Коллективы : SFU Joint Scientific Center; Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0011]
Место публикации : Emerg. Mater. - 2022. - Vol. 5, Is. 5. - P.1477-1483. - ISSN 2522-5731, DOI 10.1007/s42247-021-00330-2. - ISSN 2522-574X(eISSN)
Примечания : Cited References: 31. - The SEM and TEM analysis was carried out in the SFU Joint Scientific Center under the support of the Ministry of Science and Higher Education of the Russian Federation (#FSRZ-2020-0011)
Аннотация: The growth of bacteria and fungi on a nanofiltration (NF) membrane is known to reduce its permeability and lifetime and increase overall energy use. Over the last decade, application of silver nanoparticles (AgNPs) has shown to present a strong potential in preventing biofouling of NF membrane processes. The paper deals with a novel facile method developed to in situ incorporate nanosilver stabilized with the polyhexamethylene biguanide hydrochloride (PHMB) onto the commercial NF membrane surface. The scanning electron microscopy (SEM) investigations confirmed a uniform distribution of AgNPs on the surface of NF membrane although AgNPs tend to agglomerate into nano-sized colloidal clusters. Our results showed that AgNPs had little impact on the performance of the NF membrane, including salt rejection and water permeation properties. To evaluate the antibacterial properties of nanocomposite membranes, a "time-kill" analysis, a microbiological technique for measuring the change in a population of microorganisms under the impact of a specific sample, has been used against representatives of Gram-positive and Gram-negative bacteria. Inductively coupled mass spectrometry (ICP-MS) was used to study kinetics of Ag release from modified NF membrane. Leaching rates of Ag were low that will possibly result in long-established antimicrobial and antifungal properties. The present research offers a potential for its further use as a new type of modified NF membrane mitigating biofouling.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fadeeva N. P., Pavlov M. V., Kharchenko I. A., Simunin M. M., Shabanova K. A., Pavlov V. F., Ryzhkov I. I.
Заглавие : High strength ceramic substrates based on perlite and foam silicates for filtration membranes
Место публикации : Membr. Membr. Technol. - 2022. - Vol. 4, Is. 3. - P.170-176. - ISSN 25177516 (ISSN), DOI 10.1134/S2517751622030040
Примечания : Cited References: 32. - The work was performed using the equipment of the Krasnoyarsk Regional Center for Collective Use of the Federal Research Center, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences. This work was partially supported by the Russian Foundation for Basic Research, grant no. 18-29-19078
Аннотация: Samples of two-layer ceramics based on polydisperse powder of the pearlite mineral and foam silicates possessing high compressive strength up to 50 MPa, thermal stability up to 1150°C, and water permeability of 272 m3/h m2 bar have been obtained. According to the X-ray powder diffraction analysis, the supporting substrate material is X-ray amorphous. The average pore size of the supporting substrate is 40 µm, while the average pore size of the modifying layer is 17 µm according to the bubble method and electron microscopy. The obtained materials are promising for use as substrates of microfiltration, ultrafiltration, and nanofiltration membranes.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kostyukov A. S., Isaev I. L., Ershov A. E., Gerasimov V. S., Polyutov S. P., Karpov S. V.
Заглавие : Part I. Nanobubbles in pulsed laser fields for anticancer therapy: in search of adequate models and simulation approaches
Коллективы : Ministry of Science and High Education of Russian Federation [FSRZ-2020-0008]; RFBRRussian Foundation for Basic Research (RFBR); Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science [20-42-240003]
Место публикации : J. Phys. D. - 2022. - Vol. 55, Is. 17. - Ст.175401. - ISSN 0022-3727, DOI 10.1088/1361-6463/ac4c20. - ISSN 1361-6463(eISSN)
Примечания : Cited References: 99. - The research was supported by the Ministry of Science and High Education of Russian Federation (Project No. FSRZ-2020-0008), and was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, Project Number 20-42-240003
Предметные рубрики: INDUCED CELL-LYSIS
GOLD NANOPARTICLES
SELECTIVE NANOPHOTOTHERMOLYSIS
Аннотация: We numerically investigate the conditions for the laser-induced formation of nanobubbles in aqueous medium around plasmonic nanoparticles (NPs) bound to the malignant cell membranes that is considered as the method of their irreversible damage. We proposed employing the versatile and accessible simulation software as a research tool based on the finite volume method underlying the ANSYS Fluent package and supplemented with our user-defined functions that adapt it to solution of the stated problems. This adaptation allows to verify the model using experimental data for the same conditions. We determined the conditions for the pressure growth on the cell membrane at the initial moment of bubble formation significantly exceeding the threshold of irreversible damage. The model can be used for investigation of hydrodynamic effects accompanying irradiation of plasmonic NPs using both different types of pulsed lasers and ideally absorbing NPs with resonance in the hemoglobin spectral transparency range, as well as to uncover previously unknown effects. They include the conditions for localization of a damaging factor non-affecting the normal cells, the conditions for generation of ultrahigh pressure pulse that enables to damage the cell membrane and precedes formation of thin vapor shell around NPs, which, unlike large bubbles, requires registration using highly sensitive experimental measurements. An extensive overview of key publications summarizing the state-of-art in this area is presented.
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ryzhkov, Ilya I., Shchurkina, Margarita A., Mikhlina, Elena, V, Simunin, Mikhail M., Nemtsev I. V.
Заглавие : Switchable ionic selectivity of membranes with electrically conductive surface: Theory and experiment
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-38-20046]
Место публикации : Electrochim. Acta. - 2021. - Vol. 375. - Ст.137970. - ISSN 0013-4686, DOI 10.1016/j.electacta.2021.137970. - ISSN 1873-3859(eISSN)
Примечания : Cited References: 67. - This work is supported by the Russian Foundation for Basic Research , Project 18-38-20046 . The physicochemical analysis of materials was carried out in Krasnoyarsk Regional Center of Research Equipment of Federal Research Center 'Krasnoyarsk Science Center SB RAS'
Аннотация: Nanoporous membranes with electrically conductive surface represent an important class of stimuli–responsive materials. The variation of surface potential provides a powerful tool for adjusting ionic selectivity, conductivity, and rejection. This work is devoted to the theoretical and experimental study of switchable ionic selectivity. The one–dimensional Space charge (SC) and two–dimensional Uniform potential (UP) models are first generalized to constant surface potential case taking into account the Stern layer with inner (iHp) and outer (oHp) Helmholtz planes. The ionic selectivity is investigated experimentally by measuring the membrane potential at zero current for C–Nafen membranes prepared from alumina nanofibers with conductive carbon coating. The evolution of charging current is used to determine the dependence of surface charge density and differential capacitance on the applied potential. These data are fitted by the UP and SC models to find the Stern layer capacitance. It is shown that the variation of surface potential results in a continuous change of ionic selectivity from anion to cation. The membrane potential data are fitted by the UP and SC models using the chemical charge density and concentration boundary layer thickness as fitting parameters. It allows to determine the potential, at which the membrane becomes non–selective. The SC and UP models provide close results for membrane potential and surface charge density and demonstrate a good agreement with the experimental data. The UP model overestimates the solution velocity and ion concentrations at the membrane surface, while it underestimates the ion fluxes and iHp/oHp potentials. This work essentially extends our understanding of ion transport in stimuli–responsive membranes operated by the electric field. The results can be applied in the area of nanofiltration, (reverse) electrodialysis, electrochemical sensors, and nanofluidic devices.
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8.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Денисова, Елена Александровна, Чеканова, Лидия Александровна, Комогорцев, Сергей Викторович, Ли О.А., Рауцкий, Михаил Владимирович, Немцев, Иван Васильевич, Исхаков, Рауф Садыкович
Заглавие : Ферромагнитный резонанс Со-Ni композитных наностержней, осажденных в поликарбонатные мембраны
Коллективы : "Новое в магнетизме и магнитных материалах", международная конференция, Научный совет по физике конденсированных сред РАН, МИРЭА - Российский технологический университет, Московский государственный университет им. М.В. Ломоносова, Магнитное общество России
Место публикации : Новое в магнетизме и магнитных материалах: сборник трудов XXIV международной конференции/ прогр. ком.: Р. С. Исхаков, С. Г. Овчинников [и др.]. - 2021. - Секция 11: Магнитные наноструктуры. - Ст.11-35-38
Примечания : Библиогр.: 4. - Исследование выполнено при финансовой поддержке РФФИ, Правительства Красноярского края и Красноярского краевого фонда науки в рамках научного проекта No 20-43-240003
Аннотация: Пористый полимер, наполненный сегментированными наностержнями из магнитного металла, перспективен для создания новых микроволновых устройств. Массивы двухсегментных стержней Ni/Co и коаксиальных стержней Ni@Co получены методом химического осаждения в поликарбонатную трековую мембрану. Внутреннее эффективное магнитное поле магнитных композитных наностержней, упорядоченных на немагнитной подложке, исследовано с помощью ферромагнитного резонанса. Установлено влияние межфазных границ для двух типов стержней на эффективное поле. Обнаружено, что характеристиками ФМР можно управлять с помощью конструкции стержня (ядро-оболочка или двухсегментный стержень), свойств матрицы (пористость) и условий химического осаждения.
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9.

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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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Komogortsev S. V., Chekanova L. A., Denisova E. A., Bukaemskiy A. A., Iskhakov R. S., Mel'nikova S. V.
Заглавие : Macro- and nanoscale magnetic anisotropy of FeNi(P) micropillars in polycarbonate membrane
Место публикации : J. Supercond. Novel Magn. - 2019. - Vol. 32, Is. 4. - P.911–916. - ISSN 15571939 (ISSN) , DOI 10.1007/s10948-018-4772-y
Примечания : Cited References: 56
Ключевые слова (''Своб.индексиров.''): magnetic nanowires--magnetic microwires--magnetic pillars--magnetic anisotropy
Аннотация: Macroscopic and local magnetic anisotropy of the FeNi(P) pillars deposited using electroless plating in the pores of the nuclear track-etched polycarbonate membrane has been studied. The alloy fills the pores and forms a nail-shaped pillar. The macroscopic easy magnetization axis was found to be perpendicular to the membrane plane due to magnetic shape anisotropy. The macroscopic magnetic anisotropy constant decreases with decreasing pillar diameter from 0.4 to 0.1 μm supposedly due to increase of the pillar cap contribution. Approach to magnetic saturation analysis indicates that the order in local easy magnetization axis is localized on a nanoscale. The correlation length of the local easy axis and the local magnetic anisotropy field in (Fe100−xNi x )98P2 pillars of different compositions with diameter of 0.4 μm are studied.
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