1
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Gorbachev EA, Alyabyeva LN, Soshnikov MV, Lebedev VA, Morozov AV, Kozlyakova ES, Ahmed A, Eliseev AA, Trusov LA. Nanoceramics of metastable ε-Fe 2O 3: effect of sintering on the magnetic properties and sub-terahertz electron resonance. Mater Horiz 2023; 10:3631-3642. [PMID: 37337936 DOI: 10.1039/d3mh00626c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
In this study, we demonstrate the sintering of metastable ε-Fe2O3 nanoparticles into nanoceramics containing 98 wt% of the epsilon iron oxide phase and with a specific density of 60%. At room temperature, the ceramics retain a giant coercivity of 20 kOe and a sub-terahertz absorption at 190 GHz inherent in the initial nanoparticles. The sintering leads to an increase in the frequencies of the natural ferromagnetic resonance at 200-300 K and larger coercivities at temperatures below 150 K. We propose a simple but working explanation of the low-temperature dynamics of the macroscopic magnetic parameters of the ε-Fe2O3 materials via the transition of the smallest nanoparticles into a superparamagnetic state. The results are confirmed by the temperature dependence of the magnetocrystalline anisotropy constant and micromagnetic modeling. In addition, based on the Landau-Lifshitz formalism, we discuss features of the spin dynamics in ε-Fe2O3 and the possibility of using nanoceramics as sub-terahertz spin-pumping media. Our observations will expand the applicability of ε-Fe2O3 materials and promote their integration into telecommunication devices of the next generation.
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Affiliation(s)
- Evgeny A Gorbachev
- Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia.
| | - Liudmila N Alyabyeva
- Laboratory of Terahertz Spectroscopy, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny, 171701, Russia
| | - Miroslav V Soshnikov
- Laboratory of Terahertz Spectroscopy, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny, 171701, Russia
- Department of Materials Science, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Vasily A Lebedev
- Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland
| | - Anatolii V Morozov
- Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, Moscow, Russia
| | | | - Asmaa Ahmed
- Laboratory of Terahertz Spectroscopy, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny, 171701, Russia
- Department of Physics, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Artem A Eliseev
- Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia.
| | - Lev A Trusov
- Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia.
- Department of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 518172, China
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2
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Komkova MA, Eliseev AA, Kasimovskaya VS, Poyarkov AA, Eliseev AA, Karyakin AA. Pulse Power Generation Chronoamperometry as an Advanced Readout for (Bio)sensors: Application for Noninvasive Diabetes Monitoring. Anal Chem 2023; 95:7528-7535. [PMID: 37129422 DOI: 10.1021/acs.analchem.2c05746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We propose pulse power generation (PPG) amperometry as an advanced readout realized for Prussian blue (PB)-based (bio)sensors. In contrast to the conventional power generation mode, when the current response is generated upon continuous short-circuiting, the suggested pulse regime is fulfilled by periodic opening and shorting of the circuit. Despite PB being electroactive, the pulse readout is advantageous over conventional steady-state power generation, providing up to a 15-fold increased signal-to-background ratio as well as dramatically improved sensitivity exceeding 10 A·M-1·cm-2 for H2O2 sensors and 3.9 A·M-1·cm-2 for glucose biosensors. Such analytical performance characteristics are, most probably, achieved due to the enrichment of the diffusion layer by analyte mass transfer from the bulk upon opening of the circuit. Due to an improved sensitivity-to-background ratio, reduced flow-rate dependence, and enhanced operational stability, the regime allows reliable monitoring of blood glucose variations through sweat analysis with the on-skin device.
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Affiliation(s)
- Maria A Komkova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
| | - Artem A Eliseev
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
| | - Valeria S Kasimovskaya
- Department of Materials Science, Lomonosov Moscow State University, Leninskie gory 1-73, Moscow 119991, Russia
| | - Andrei A Poyarkov
- Department of Materials Science, Lomonosov Moscow State University, Leninskie gory 1-73, Moscow 119991, Russia
| | - Andrei A Eliseev
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
- Department of Materials Science, Lomonosov Moscow State University, Leninskie gory 1-73, Moscow 119991, Russia
| | - Arkady A Karyakin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
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Komkova MA, Poyarkov AA, Eliseev AA, Eliseev AA. Mass transport limitations for electrochemical sensing in low-flux excretory fluids. Biosens Bioelectron 2023; 227:115148. [PMID: 36841113 DOI: 10.1016/j.bios.2023.115148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/06/2023] [Accepted: 02/11/2023] [Indexed: 02/17/2023]
Abstract
Despite non-invasive instant monitoring of sweat metabolites is becoming a general trend in early diagnostics and screening, the reliability and accuracy of the on-skin electrochemical biosensors in real-life scenarios still remain questionable. As a rule, mass transport effects in scantily excreted liquids are ignored, when considering the design of such wearable setups. Here we provide a comprehensive investigation of the disruption factors for commonly used Prussian Blue based (bio)sensors under different hydrodynamic conditions (2 × 10-5 - 5 × 100 mm s-1 electrolyte velocity). A huge effect of flow on the (bio)sensors response has been revealed and explained with transport limitations for both analyte influx and reaction product outflux. It suggests no need for improving the sensor sensitivity, while minimizing analyte consumption and enhancing product withdrawal. Some strategies concerning measurement schemes and sensor design ensuring reliable sweat analysis have been discussed and illustrated for lactate and glucose on-skin monitoring.
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Affiliation(s)
- Maria A Komkova
- Chemistry Faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia
| | - Andrei A Poyarkov
- Materials Science Faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia
| | - Artem A Eliseev
- Chemistry Faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia
| | - Andrei A Eliseev
- Chemistry Faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia; Materials Science Faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia.
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4
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Komkova MA, Eliseev AA, Poyarkov AA, Daboss EV, Evdokimov PV, Eliseev AA, Karyakin AA. Simultaneous monitoring of sweat lactate content and sweat secretion rate by wearable remote biosensors. Biosens Bioelectron 2022; 202:113970. [PMID: 35032921 DOI: 10.1016/j.bios.2022.113970] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/07/2021] [Accepted: 01/04/2022] [Indexed: 12/15/2022]
Abstract
We report on the simultaneous monitoring of sweat lactate concentration and sweat secretion rate. For this aim lactate oxidase-Prussian Blue enzyme-nanozyme type lactate biosensors were elaborated. The use of siloxane-perfluorosulfonated ionomer composite membrane for enzyme-nanozyme immobilization results in the biosensor displaying flux independence in the whole range of physiological sweat secretion rates (0.025-2 μl cm-2 min-1). On the contrary, current response of the biosensor based on solely siloxane membranes becomes saturated at physiological sweat lactate concentration, depending mostly on the flow rate. Accordingly, for simultaneous monitoring of sweat lactate concentration and its secretion rate both flow-through biosensors were integrated with high-accuracy wearable electronic devices allowing real-time remote monitoring. As found, during exhaustive physical exercise sweat secretion rate and lactate content are independent of each other, thus, confirming that this excretory liquid is suitable for non-invasive diagnostics.
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Affiliation(s)
- Maria A Komkova
- Chemistry faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia.
| | - Artem A Eliseev
- Chemistry faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia
| | - Andrei A Poyarkov
- Materials Science faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia
| | - Elena V Daboss
- Chemistry faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia
| | - Pavel V Evdokimov
- Chemistry faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia; Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninskii prospect 31, Moscow, 119991, Russia
| | - Andrei A Eliseev
- Materials Science faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia
| | - Arkady A Karyakin
- Chemistry faculty of M.V. Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119991, Russia
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5
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Boytsova OV, Drozhzhin OA, Petukhov DI, Chumakova AV, Sobol AG, Beltyukov AN, Eliseev AA, Bosak AB. One-step synthesis of vanadium-doped anatase mesocrystals for Li-ion battery anodes. Nanotechnology 2021; 33:055603. [PMID: 34670202 DOI: 10.1088/1361-6528/ac317a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
Here we report a successful one-step synthesis of vanadium-doped anatase mesocrystals by reactive annealing of NH4TiOF3/PEG2000 mesocrystal precursors with NH4VO3. The formation solid solution Ti1-xVxO2with vanadium content up tox = 25 at% inheriting the structure of mesocrystals is observed for the first time. The doping mechanism via vapor phase transport of vanadium is proposed. The Ti1-xVxO2mesocrystals exhibit improved specific capacity of 175 mAh g-1(compared to 150 mAh g-1for pure anatase phase) and decreased potential gap between charge and discharge processes.
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Affiliation(s)
- O V Boytsova
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia
- Kurnakov Institute of General and Inorganic Chemistry RAS, Leninskii Prosp. 31, Moscow, 119071, Russia
| | - O A Drozhzhin
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow, 119991, Russia
| | - D I Petukhov
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow, 119991, Russia
| | - A V Chumakova
- European Synchrotron Radiation Facility, 78 Avenue des Martyrs, 38000 Grenoble, France
| | - A G Sobol
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia
| | - A N Beltyukov
- Udmurt Federal Research Center of the Ural Brunch of Russian Academy of Sciences (UdmFRCof UB RAS), Izhevsk, st.them. Tatiana Baramzina 34, 426067, Russia
| | - A A Eliseev
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia
| | - A B Bosak
- European Synchrotron Radiation Facility, 78 Avenue des Martyrs, 38000 Grenoble, France
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6
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Trusov LA, Sleptsova AE, Duan J, Gorbachev EA, Kozlyakova ES, Anokhin EO, Eliseev AA, Karpov MA, Vasiliev AV, Brylev OA, Kazin PE. Glass-Ceramic Synthesis of Cr-Substituted Strontium Hexaferrite Nanoparticles with Enhanced Coercivity. Nanomaterials (Basel) 2021; 11:nano11040924. [PMID: 33916445 PMCID: PMC8065585 DOI: 10.3390/nano11040924] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 03/27/2021] [Accepted: 04/01/2021] [Indexed: 11/16/2022]
Abstract
Magnetically hard ferrites attract considerable interest due to their ability to maintain a high coercivity of nanosized particles and therefore show promising applications as nanomagnets ranging from magnetic recording to biomedicine. Herein, we report an approach to prepare nonsintered single-domain nanoparticles of chromium-substituted hexaferrite via crystallization of glass in the system SrO-Fe2O3-Cr2O3-B2O3. We have observed a formation of plate-like hexaferrite nanoparticles with diameters changing from 20 to 190 nm depending on the annealing temperature. We demonstrated that chromium substitution led to a significant improvement of the coercivity, which varied from 334 to 732 kA m-1 for the smallest and the largest particles, respectively. The results provide a new strategy for producing high-coercivity ferrite nanomagnets.
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Affiliation(s)
- Lev A. Trusov
- Faculty of Materials Science, MSU-BIT University, Shenzhen 517182, China; (J.D.); (E.A.G.); (O.A.B.)
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.O.A.); (A.A.E.); (M.A.K.); (A.V.V.); (P.E.K.)
- Correspondence:
| | | | - Jingtong Duan
- Faculty of Materials Science, MSU-BIT University, Shenzhen 517182, China; (J.D.); (E.A.G.); (O.A.B.)
| | - Evgeny A. Gorbachev
- Faculty of Materials Science, MSU-BIT University, Shenzhen 517182, China; (J.D.); (E.A.G.); (O.A.B.)
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.O.A.); (A.A.E.); (M.A.K.); (A.V.V.); (P.E.K.)
- Faculty of Materials Science, Lomonosov Moscow State University, 119991 Moscow, Russia;
| | - Ekaterina S. Kozlyakova
- Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia;
- Laboratory of Functional Quantum Materials, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
| | - Evgeny O. Anokhin
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.O.A.); (A.A.E.); (M.A.K.); (A.V.V.); (P.E.K.)
- Faculty of Materials Science, Lomonosov Moscow State University, 119991 Moscow, Russia;
| | - Artem A. Eliseev
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.O.A.); (A.A.E.); (M.A.K.); (A.V.V.); (P.E.K.)
| | - Maxim A. Karpov
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.O.A.); (A.A.E.); (M.A.K.); (A.V.V.); (P.E.K.)
| | - Alexander V. Vasiliev
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.O.A.); (A.A.E.); (M.A.K.); (A.V.V.); (P.E.K.)
| | - Oleg A. Brylev
- Faculty of Materials Science, MSU-BIT University, Shenzhen 517182, China; (J.D.); (E.A.G.); (O.A.B.)
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.O.A.); (A.A.E.); (M.A.K.); (A.V.V.); (P.E.K.)
- Faculty of Materials Science, Lomonosov Moscow State University, 119991 Moscow, Russia;
| | - Pavel E. Kazin
- Faculty of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia; (E.O.A.); (A.A.E.); (M.A.K.); (A.V.V.); (P.E.K.)
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7
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Zykin MA, Dyakonov AK, Eliseev AA, Trusov LA, Kremer RK, Dinnebier RE, Jansen M, Kazin PE. Tb-based silicate apatites showing slow magnetization relaxation with identical parameters for the Tb 3+ and Dy 3+ counter ions. RSC Adv 2021; 11:6926-6933. [PMID: 35423173 PMCID: PMC8694933 DOI: 10.1039/d1ra00613d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 02/04/2021] [Indexed: 01/29/2023] Open
Abstract
Tb-diluted and Tb-rich apatite-type silicates with compositions Y7.75Tb0.25Ca2(SiO4)6O2 and Tb8Ca2(SiO4)6O2, respectively, exhibit field induced multiple slow relaxation of magnetization. The former reveals two slow relaxation paths, the latter only one with a longer relaxation time of several seconds. The relaxation features of the Tb-diluted one are comparable with those of analogue compounds, where Tb is replaced by Dy, as well as with those of a Tb-doped calcium phosphate apatite. The relaxation parameters of the Tb-rich compound virtually match those of the Dy-based analogue Dy8Ca2(SiO4)6O2. The latter represents the first instance of independence of magnetization relaxation on the nature of a paramagnetic rare-earth metal ion in single ion magnet like materials.
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Affiliation(s)
- Mikhail A Zykin
- Department of Chemistry, Lomonosov Moscow State University 119991 Moscow Russia +7 495 9393440
- Institute of General and Inorganic Chemistry RAS (IGIC RAS) 31 Leninsky Ave. 119991 Moscow Russia
| | - Andrey K Dyakonov
- Department of Chemistry, Lomonosov Moscow State University 119991 Moscow Russia +7 495 9393440
| | - Artem A Eliseev
- Department of Chemistry, Lomonosov Moscow State University 119991 Moscow Russia +7 495 9393440
| | - Lev A Trusov
- Department of Chemistry, Lomonosov Moscow State University 119991 Moscow Russia +7 495 9393440
| | - Reinhard K Kremer
- Max Planck Institute for Solid State Research Heisenbergstrasse 1 70569 Stuttgart Germany
| | - Robert E Dinnebier
- Max Planck Institute for Solid State Research Heisenbergstrasse 1 70569 Stuttgart Germany
| | - Martin Jansen
- Max Planck Institute for Solid State Research Heisenbergstrasse 1 70569 Stuttgart Germany
| | - Pavel E Kazin
- Department of Chemistry, Lomonosov Moscow State University 119991 Moscow Russia +7 495 9393440
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Cao W, Yin S, Plank M, Chumakov A, Opel M, Chen W, Kreuzer LP, Heger JE, Gallei M, Brett CJ, Schwartzkopf M, Eliseev AA, Anokhin EO, Trusov LA, Roth SV, Müller-Buschbaum P. Spray-Deposited Anisotropic Ferromagnetic Hybrid Polymer Films of PS- b-PMMA and Strontium Hexaferrite Magnetic Nanoplatelets. ACS Appl Mater Interfaces 2021; 13:1592-1602. [PMID: 33355441 DOI: 10.1021/acsami.0c19595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Spray deposition is a scalable and cost-effective technique for the fabrication of magnetic hybrid films containing diblock copolymers (DBCs) and magnetic nanoparticles. However, it is challenging to obtain spray-deposited anisotropic magnetic hybrid films without using external magnetic fields. In the present work, spray deposition is applied to prepare perpendicular anisotropic magnetic hybrid films by controlling the orientation of strontium hexaferrite nanoplatelets inside ultra-high-molecular-weight DBC polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) films. During spray deposition, the evolution of DBC morphology and the orientation of magnetic nanoplatelets are monitored with in situ grazing-incidence small-angle X-ray scattering (GISAXS). For reference, a pure DBC film without nanoplatelets is deposited with the same conditions. Solvent-controlled magnetic properties of the hybrid film are proven with solvent vapor annealing (SVA) applied to the final deposited magnetic films. Obvious changes in the DBC morphology and nanoplatelet localization are observed during SVA. The superconducting quantum interference device data show that ferromagnetic hybrid polymer films with high coercivity can be achieved via spray deposition. The hybrid films show a perpendicular magnetic anisotropy before SVA, which is strongly weakened after SVA. The spray-deposited hybrid films appear highly promising for potential applications in magnetic data storage and sensors.
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Affiliation(s)
- Wei Cao
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
| | - Shanshan Yin
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
| | - Martina Plank
- Ernst-Berl-Institute for Technical and Macromolecular Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287 Darmstadt, Germany
| | - Andrei Chumakov
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - Matthias Opel
- Bayerische Akademie der Wissenschaften, Walther-Meissner-Institut, Walther-Meissner-Straße 8, 85748 Garching, Germany
| | - Wei Chen
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
| | - Lucas P Kreuzer
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
| | - Julian E Heger
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
| | - Markus Gallei
- Chair in Polymer Chemistry, Saarland University, Campus C4 2, 66123 Saarbrücken, Germany
| | - Calvin J Brett
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
- Department of Engineering Mechanics, KTH Royal Institute of Technology, Teknikringen 8, SE-100 44 Stockholm, Sweden
- Wallenberg Wood Science Center, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | | | - Artem A Eliseev
- Department of Chemistry, Moscow State University, 119991 Moscow, Russia
| | - Evgeny O Anokhin
- Department of Materials Science, Moscow State University, 119991 Moscow, Russia
| | - Lev A Trusov
- Department of Chemistry, Moscow State University, 119991 Moscow, Russia
| | - Stephan V Roth
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Peter Müller-Buschbaum
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany
- Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstraße 1, 85748 Garching, Germany
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9
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Zykin MA, Eliseev AA, Vasiliev AV, Kremer RK, Dinnebier RE, Jansen M, Kazin PE. Slow Relaxation of Magnetization in the Cobalt‐Containing Strontium Hydroxy/Fluoro‐Apatite. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201901017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Mikhail A. Zykin
- Department of Chemistry Lomonosov Moscow State University 119991 Moscow Russia
| | - Artem A. Eliseev
- Department of Chemistry Lomonosov Moscow State University 119991 Moscow Russia
| | | | - Reinhard K. Kremer
- Max Planck Institute for Solid State Research Heisenbergstrasse 1 70569 Stuttgart Germany
| | - Robert E. Dinnebier
- Max Planck Institute for Solid State Research Heisenbergstrasse 1 70569 Stuttgart Germany
| | - Martin Jansen
- Max Planck Institute for Solid State Research Heisenbergstrasse 1 70569 Stuttgart Germany
| | - Pavel E. Kazin
- Department of Chemistry Lomonosov Moscow State University 119991 Moscow Russia
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10
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Anokhin EO, Trusov LA, Kozlov DA, Chumakov RG, Sleptsova AE, Uvarov OV, Kozlov MI, Petukhov DI, Eliseev AA, Kazin PE. Silica coated hard-magnetic strontium hexaferrite nanoparticles. ADV POWDER TECHNOL 2019. [DOI: 10.1016/j.apt.2019.06.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Petukhov DI, Chumakov AP, Kan AS, Lebedev VA, Eliseev AA, Konovalov OV, Eliseev AA. Spontaneous MXene monolayer assembly at the liquid-air interface. Nanoscale 2019; 11:9980-9986. [PMID: 31074468 DOI: 10.1039/c9nr00525k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Here we report on the spontaneous assembly of Ti3C2Tx MXene flakes into monolayer films at the liquid-air interface. According to X-ray reflectivity and grazing incidence X-ray fluorescence both the structure of the layers and assembly kinetics depends on the pH value of the solution. At pH > 4 MXene flakes form a single ∼1.5 nm thick layer carrying a negative charge, while in the acidic medium the layer contains coordinated anions with the formation of the Braq-/Ti3C2Tx/subphase interface. The surface layer compression allows the assembling of MXene flakes into a dense monolayer films with the surface coverage of up to 96% and surface pressure exceeding 40 mN m-1 in the case of the acidic subphase. The films can readily be transferred onto solid substrates by the conventional Langmuir-Blodgett approach or modified by surfactants to form MXene/surfactant composite films.
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Affiliation(s)
- D I Petukhov
- Department of Chemistry, Lomonosov Moscow State University, Leninskiye gory 1-3, Moscow, 119991, Russia and Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskiye gory, Moscow, 119991, Russia
| | - A P Chumakov
- ESRF - The European Synchrotron. 71, Avenue des Martyrs, 38043 Grenoble, France
| | - A S Kan
- Department of Chemistry, Lomonosov Moscow State University, Leninskiye gory 1-3, Moscow, 119991, Russia
| | - V A Lebedev
- Department of Chemistry, Lomonosov Moscow State University, Leninskiye gory 1-3, Moscow, 119991, Russia
| | - Artem A Eliseev
- Department of Chemistry, Lomonosov Moscow State University, Leninskiye gory 1-3, Moscow, 119991, Russia and Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskiye gory, Moscow, 119991, Russia
| | - O V Konovalov
- ESRF - The European Synchrotron. 71, Avenue des Martyrs, 38043 Grenoble, France
| | - Andrei A Eliseev
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskiye gory, Moscow, 119991, Russia
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12
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Zykin MA, Eliseev AA, Pogosova MA, Trusov LA, Schnelle W, Felser C, Jansen M, Kazin PE. Impact of fluoride for hydroxide substitution on the magnetic properties of a Co-based single-ion magnet imbedded in the barium apatite crystal lattice. CrystEngComm 2019. [DOI: 10.1039/c8ce02042f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The atomic group O–Co–O persists in the apatite channel and retains a high energy barrier for magnetization reversal.
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Affiliation(s)
- Mikhail A. Zykin
- Department of Materials Science
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Artem A. Eliseev
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Mariam A. Pogosova
- Center for Electrochemical Energy Storage
- Skolkovo Institute of Science and Technology
- 121205 Moscow
- Russia
| | - Lev A. Trusov
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Walter Schnelle
- Max Planck Institute for Chemical Physics of Solids
- 01187 Dresden
- Germany
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids
- 01187 Dresden
- Germany
| | - Martin Jansen
- Max Planck Institute for Chemical Physics of Solids
- 01187 Dresden
- Germany
- Max Planck Institute for Solid State Research
- 70569 Stuttgart
| | - Pavel E. Kazin
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
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13
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Gorbachev EA, Trusov LA, Sleptsova AE, Anokhin EO, Zaitsev DD, Vasiliev AV, Eliseev AA, Kazin PE. Synthesis and magnetic properties of the exchange-coupled SrFe10.7Al1.3O19/Co composite. Mendeleev Communications 2018. [DOI: 10.1016/j.mencom.2018.07.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Kazin PE, Zykin MA, Trusov LA, Eliseev AA, Magdysyuk OV, Dinnebier RE, Kremer RK, Felser C, Jansen M. A Co-based single-molecule magnet confined in a barium phosphate apatite matrix with a high energy barrier for magnetization relaxation. Chem Commun (Camb) 2017; 53:5416-5419. [DOI: 10.1039/c7cc02453c] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A Co-ion introduced into the trigonal channel of an apatite-type lattice forms a magnetically anisotropic two-coordinated Co-complex with a record-high spin-reversal energy barrier.
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Affiliation(s)
- Pavel E. Kazin
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Mikhail A. Zykin
- Department of Materials Science
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Lev A. Trusov
- Department of Materials Science
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Artem A. Eliseev
- Department of Materials Science
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | | | | | | | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids
- 01187 Dresden
- Germany
| | - Martin Jansen
- Max Planck Institute for Solid State Research
- 70569 Stuttgart
- Germany
- Max Planck Institute for Chemical Physics of Solids
- 01187 Dresden
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15
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Abstract
An experimental study on the permeability of anodic alumina (20-120 nm) and track-etched (30 nm) nanoporous membranes for different gases in the transitional flow regime is reported in the range of Knudsen numbers from 0.1 to 10. A significant variation (up to 30%) of the membrane permeance for different gases at the same Knudsen numbers is reported with certainty. It is established that this discrepancy relates to a molecule's effective collision area, which is poorly described in the frameworks of conventional gas permeation models. Two models are proposed for the description of the effect: self-diffusion of penetrate gases due to intermolecular collisions and enhancement of the slip flow contribution due to tangential momentum accommodation growth with the decrease of a molecule's effective collision area. The best fit parameters for the simultaneous fit of the experimental data with different models for 30 membrane-gas pairs are given.
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Affiliation(s)
- D I Petukhov
- Department of Chemistry, Moscow State University, Leninskie Hills 1-3, Moscow 119991, Russia. Physical-Technical Institute UB RAS, 132 Kirov Street, Izhevsk 426000, Russia
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16
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Kiselev NA, Kumskov AS, Zhigalina VG, Vasiliev AL, Sloan J, Falaleev NS, Verbitskiy NI, Eliseev AA. The structure and continuous stoichiometry change of 1DTbBrx@SWCNTs. J Microsc 2015; 262:92-101. [PMID: 26625140 DOI: 10.1111/jmi.12348] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 09/29/2015] [Indexed: 11/29/2022]
Abstract
HRTEM and HAADF STEM of 1DTbBrx@SWCNT meta-nanotubes reveal three structural modifications of 1D nanocrystals within single wall carbon nanotube channels attributed to a different stoichiometry of the guest crystal. For SWCNTs with diameters Dm > 1.4 nm a most complete tetragonal unit cell is observed. When crystallization occurs inside SWCNT with Dm < 1.4 nm 1D TbBrx crystal deforms a nanotube to elliptical shape in cross section. In this case the 1D crystal unit cell becomes monoclinic, with possible loss of a part of bromine atoms. Two modifications of a monoclinic unit cell appear. One of them is characterized by single or pair vacancies in the structure of the 1D crystal. Another structure is explained by peripheral and central bromine atoms loss. An appearance of such modifications can be stimulated by electron irradiation. The loss of bromine atoms is in agreement with chemical analysis data. Electronic properties of obtained meta-nanotubes are investigated using optical absorption and Raman spectroscopy. It is shown that intercalation of terbium bromide into SWCNTs leads to acceptor doping of SWCNTs. According to local EDX analysis and elemental mapping this doping can arise from significant stoichiometry change in 1D nanocrystal indicating an average Tb:Br atomic ratio of 1:2.8 ± 0.1.
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Affiliation(s)
- N A Kiselev
- Electron microscopy laboratory, Shubnikov Institute of Crystallography RAS, Moscow, Russia
| | - A S Kumskov
- Electron microscopy laboratory, Shubnikov Institute of Crystallography RAS, Moscow, Russia.,NBIC Center, NRC 'Kurchatov Institute', Moscow, Russia.,Center for surface and vacuum research (CSVR), Moscow, Russia
| | - V G Zhigalina
- Electron microscopy laboratory, Shubnikov Institute of Crystallography RAS, Moscow, Russia.,Center for surface and vacuum research (CSVR), Moscow, Russia
| | - A L Vasiliev
- Electron microscopy laboratory, Shubnikov Institute of Crystallography RAS, Moscow, Russia.,NBIC Center, NRC 'Kurchatov Institute', Moscow, Russia
| | - J Sloan
- Department of Physics, University of Warwick, Coventry, Warwickshire, U.K
| | - N S Falaleev
- Department of Materials Science, Moscow State University, Moscow, Russia
| | - N I Verbitskiy
- Department of Materials Science, Moscow State University, Moscow, Russia.,Faculty of Physics, University of Vienna, Vienna, Austria.,Institute of Physics 2, University of Cologne, Cologne, Germany
| | - A A Eliseev
- Department of Materials Science, Moscow State University, Moscow, Russia
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17
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Kiselev NA, Kumskov AS, Zhigalina VG, Verbitskiy NI, Yashina LV, Chuvilin AL, Vasiliev AL, Eliseev AA. The structure and electronic properties of copper iodide 1D nanocrystals within single walled carbon nanotubes. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/471/1/012035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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18
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Abstract
Mass-transport properties of anodic alumina membranes exploited in a number of technological areas are strongly affected by the real pore structure and arrangement of channels that can split or terminate during the anodization process. This paper focuses on the investigation of pore branching and rearrangement caused by voltage variation in the course of the anodic oxidation of aluminum. Gas-transport measurements were utilized for the quantitative determination of an effective through porosity of multilayer anodic alumina membranes with branched channels obtained by variation of anodization voltage. It was shown that on decrease of anodization voltage a branching of pores occurs, while an increase of anodization voltage leads to the termination of some of the pores with an increase in the diameter of others. Gas permeance measurements combined with electron microscopy unambiguously prove dead-end pore formation on voltage increase, while no pore merging appears. This generally affects any mass-transport properties and applications of anodic alumina membranes as the delivery of any species (e.g. ions, gas molecules, etc) through the blocked channels is impossible.
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Affiliation(s)
- D I Petukhov
- Department of Materials Science, Lomonosov Moscow State University, Leninskie Gory, 119991, Moscow, Russia.
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19
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Burov IA, Eliseev AA, Kolodin MV. [Use of loop thromboendarterectomy in iliac-femoropopliteal arterial segment: contemporary state of the problem]. Vestn Khir Im I I Grek 2011; 170:124-128. [PMID: 21848253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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20
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Drozdov VN, Neĭman KP, Noskova KK, Petrakov AV, Eliseev AA. [Deficiency of essential microelements in patients with diseases of the digestive system]. Eksp Klin Gastroenterol 2011:36-40. [PMID: 22629698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
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21
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Losev RZ, Nikolenko VN, Mikul'skaia EG, Eliseev AA, Burov IA. [Functional-anatomical prerequisites of revascularization of the femoro-popliteal arterial segment]. Vestn Khir Im I I Grek 2008; 167:18-21. [PMID: 18411661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Improved results of surgical treatment of patients with critical ischemia of lower extremities can be obtained by using the collateral bed. The condition of the profound femoral artery and the popliteal artery, especially in the zone of its trifurcation, is of the greatest significance for the decision on the volume of surgery. The carrying capacity of the collateral bed of the profound femoral artery in occlusion of the femoral artery was on average 284 ml/min. A positive prognostic criterion of recovered circulation in the extremity using the profound femoral artery is preservation of the patent trifurcation of the popliteal artery and/or the anterior tibial artery. The blood flow volume along the profound femoral artery under the given functional-anatomical conditions should be not less than 150 ml/min. Semiclosed loop endarterectomy of the superficial femoral and popliteal arteries with multilevel lesions of the lower extremity arteries allows the main zones of the collateral bed of the femoro-popliteal-tibial segment to be included in the blood flow.
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22
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Losev RZ, Burov IA, Mikul'skaia EG, Eliseev AA, Bogdanova NB, Skriabin VV. [Multilevel revascularization of the lower extremities using loop endarterectomy]. Vestn Khir Im I I Grek 2006; 165:21-4. [PMID: 17315682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Results of 91 reconstructions of the ilio-femoro-popliteal segment in patients with multilevel injuries of the lower extremity arteries were analyzed. In 42 of the operations a method of operations associated with loop endarterectomy was used. The first stage in all the patients consisted of iliac deep femoral reconstructions or semi-closed loop endarterectomy from iliac arteries in order for inclusion in blood flow of the profound femoral artery. In the presence of the volumetric blood flow along the profound femoral artery less than 150 ml/min after the first stage of revascularization the operation volume was extended at the expense of the femoro-distal reconstructions and/or semi-closed loop endarterectomy from the femoral and popliteal arteries. It was found that revascularization of the ilio-femoral segment in combination with desobliteration of the popliteal artery allowed performing two-level reconstructions with little time and material costs followed by primary positive results in 92.9% of cases.
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23
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Martem'ianov SV, Uvarov EA, Safonova OV, Eliseev AA. [Quality of life of patients with atherosclerotic lesion of lower extremity arteries as dependent on individual and typological properties of the patient personality]. Angiol Sosud Khir 2003; 9:15-9. [PMID: 14657905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Twenty men with atherosclerotic lesion of lower extremity arteries verified by contrast angiography and ultrasound Doppler were examined. The patients' age varied from 36 to 69 years (mean 57 years). Six patients had IIB ischemia, 13 presented with degree III and one patient had degree IV ischemia according to the R. Fontaine classification modified by A. V. Pokrovsky. The MOS SF = 36 questionnaire was used to estimate the quality of life of all the patients. The individual typological properties of the personality were defined using the psychodiagnostic test (PDT). A significant decrease of the patients' quality of life was revealed according to the scales: physical function, physical role, physical pain, general health condition. A correlation was recorded between the patient's age and the parameters of the "physical function scale" (r=-0.63; p<0.005). The individual typological properties of the personality exert an effect on five of the eight SF = 36 scales. A feedback was discovered between neurotism and mental health (r=-0.455; P<0.05), conscientiousness and the physical role (r=-0,487; p<0.05); a direct relationship was found between disinhibition and physical pain (r=0.451; p<0.05), general activity and physical pain (r=0.535; p<0.05). An indistinctly pronounced feed back manifested itself between the "neurotism" and "physical pain" scales (r=-0.409), "psychotism" end the "physical role", (r=-0.437), "introversion" and "vitality" (r=-0.408), "femininity" and the "emotional role" (r=-0.404), and a direct relationship was established between the scales "esthetic impressionability" and "vitality" (r=0.406).
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Affiliation(s)
- S V Martem'ianov
- Department of Vascular Surgery, Regional Hospital, Tambov, Russia
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24
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Bykhovskiĭ VI, Zaĭtseva NI, Eliseev AA. [Tetrapyrroles: diversity, biosynthesis, biotechnology]. Prikl Biokhim Mikrobiol 1998; 34:3-21. [PMID: 9566289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Various aspects of metabolism and biotechnology of tetrapyrroles are reviewed. Structures and properties of newly discovered tetrapyrrole pigments, biosynthesis of most important functional tetrapyrroles (hemes, chlorophylls, corrinoids, siroheme, and methanogenesis factor F430), and biotechnological methods of production of porphyrins and corrinoids are discussed. 5-Aminolevulinic acid is shown to be a promising anticancer preparation.
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Affiliation(s)
- V Ia Bykhovskiĭ
- Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
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25
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Bykhovskiĭ VI, Zaĭtseva NI, Eliseev AA, Pushkin AV, Evstigneeeva ZG. [Glutamine-dependent amidation of the corrin ring of vitamin B12]. Dokl Akad Nauk SSSR 1982; 267:1250-1254. [PMID: 7151681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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