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Composite polymer granules based on poly-ε-caprolactone and montmorillonite prepared by solution-casting and melt extrusion / A. Sukhanova, A. Boyandin, N. Ertiletskaya [et al.] // Polymers. - 2023. - Vol. 15, Is. 20. - Ст. 4099, DOI 10.3390/polym15204099. - Cited References: 45. - This research was supported by a grant from the Russian Science Foundation, project No. 23-16-00184 . - ISSN 2073-4360
Кл.слова (ненормированные):
biodegradable polymers -- poly-ε-caprolactone -- montmorillonite -- polymer composites -- processing technologies
Аннотация: Eco-friendly polymer composites in the form of granules based on biodegradable polycaprolactone (PCL) with the inclusion of montmorillonite (MMT) from 5 to 50 wt% were prepared by solution-casting and melt extrusion. The physicochemical properties of the composite granules were studied using FTIR spectroscopy, XRDA, DSC, and TGA methods. The paper presents comparative values of crystallinity of composite granules which depend on the method of measuring (XRDA, DSC). It was shown that the crystallinity of PCL/MMT granules was affected by the preparation method and by the MMT content, and that with increase in MMT content, crystallinity increased by up to 61–67%. The change in crystallinity of the granules also affected its biodegradation in soil. At the end of exposure in soil, the mass loss for the granules prepared by solution-casting was more than 90%, whereas for the composite granules prepared by extrusion it was less than 60%. Applying melt extrusion enabled obtaining intercalated composites with predictable features, whereas only mixed-structure microcomposites could be prepared by solution-casting.

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Держатели документа:
Department of Biodegradable Polymers Materials, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarskiy Rabochiy Av., Krasnoyarsk 660037, Russia
Department of Analysis, Synthesis, Modeling and Digital Design of Smart Materials with Specified Properties, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarskiy Rabochiy Av., Krasnoyarsk 660037, Russia
Department of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/38 Akademgorodok, Krasnoyarsk 660036, Russia
Department Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodny Av., Krasnoyarsk 660041, Russia
Department of Digital Design of Transformable Structures based on Smart Materials, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarskiy Rabochiy Av., Krasnoyarsk 660037, Russia
Department of Scientific Activities, Science and Technology, Siberian Federal University, 79 Svobodny Av., Krasnoyarsk 660041, Russia
Department of Intelligent Materials and Systems, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarskiy Rabochiy Av., Krasnoyarsk 660037, Russia

Доп.точки доступа:
Sukhanova, Anna; Boyandin, Anatoly; Ertiletskaya, Natalya; Shalygina, Taisia; Shabanov, A. V.; Шабанов, Александр Васильевич; Vasiliev, Alexander; Obvertkin, Ivan; Brott, Valeria; Prokopchuk, Yulia; Samoilo, Alexander
}
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    Structural, magnetic and electrochemical characteristics of Ni/C composites fabricated from modified hydrolytic lignin / S. I. Tsyganova, O. Yu. Fetisova, D. A. Velikanov, O. P. Taran // Mater. Lett. - 2023. - Vol. 352. - Ст. 135120, DOI 10.1016/j.matlet.2023.135120. - Cited References: 11. - The present work was supported by the Russian Foundation for Basic Research , the Government of the Krasnoyarsk Territory and carried out as part of the budget project ( 0287-2021-0017 ) of the Institute of Chemistry and Chemical Technology SB RAS . - ISSN 0167-577X. - ISSN 1873-4979
   Перевод заглавия: Структурные, магнитные и электрохимические характеристики Ni/C-композитов, полученных из модифицированного гидролитического лигнина
Кл.слова (ненормированные):
Hydrolytic lignin -- Porosity -- Ni/C composite -- Carbonization -- Magnetic properties -- Specific capacity
Аннотация: The synthesis of metal–carbon materials based on hydrolytic lignin by its modification with subsequent carbonation is studied. It is shown the modification of hydrolysis lignin with ZnCl2 and NiCl2 leads to a significant increase of specific surface area up to 716 m2/g and the apparent specific capacity up to 350F/g of carbonized composite. It was found out that fabricated Ni/C composites are characterized by a coercive force of 80–105 Oe, a saturation magnetization of 4–11 Gs•cm3/g, and a residual magnetization of 0.28–0.45 Gs•cm3/g. This indicates the prospects of their use as a magnetically soft material.

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Держатели документа:
Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center KSC Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Tsyganova, S. I.; Yu. Fetisova, O.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Taran, O. P.
}
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Preparation and properties of magnetic composites γ-Fe2O3/SiO2/aptamer(FAS9) for magnetic resonance hyperthermia / S. V. Stolyar, O. A. Li, E. D. Nikolaeva [et al.] // Phys. Met. Metallogr. - 2023. - Vol. 124, Is. 14. - P. 1689-1696, DOI 10.1134/S0031918X23601439. - Cited References: 27 . - ISSN 0031-918X. - ISSN 1555-6190
Кл.слова (ненормированные):
ferromagnetic resonance -- magnetic hyperthermia -- maghemite
Аннотация: Powders of maghemite γ-Fe2O3 with an average diameter of 8 nm, γ-Fe2O3/SiO2 composites with an agglomerate diameter of about 50 nm and a size of interspersed γ-Fe2O3 particles of 6 nm, and γ‑Fe2O3/SiO2/aptamer(FAS9) composites were synthesized by chemical deposition. Mössbauer spectra were measured, the static and dynamic magnetic properties of the powders were studied, and the coercive force was determined, which decreases from 14 Oe for γ-Fe2O3 powders to 3 Oe for the γ-Fe2O3/SiO2 composite. It is shown that the particle blocking temperature is close to room temperature. The increment of temperature of the powders was measured in the ferromagnetic resonance mode; the temperature of the Fe2O3/SiO2 composite (ΔT ≈ 16°C) turned out to be higher than that of the pure γ-Fe2O3 powder (ΔT ≈ 10°C). It has been experimentally shown that temperature increment ΔT is proportional to the square of the microwave field amplitude. It has been shown that the composition γ-Fe2O3/SiO2/aptamer FAS9 is able to effectively bind to tumor cells, and FMR hyperthermia leads to a decrease in the viability of tumor cells.

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Держатели документа:
Federal Research Center, Krasnoyarsk Science Center, Siberian Branch of the Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Li, O. A.; Nikolaeva, E. D.; Vorotynov, A. M.; Воротынов, Александр Михайлович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Bayukov, O. A.; Баюков, Олег Артемьевич; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Kryukova, O. V.; Pyankov, V. F.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Mokhov, A. A.
}
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Fabrication and thermoelectric properties of SrTiO3–TiO2 composite ceramics / A. P. Zavjalov, G. A. Lyubas, M. R. Sharafutdinov [et al.] // Ceram. Int. - 2022. - Vol. 48, Is. 24. - P. 36500-36514, DOI 10.1016/j.ceramint.2022.08.210. - Cited References: 55. - This work was supported by the Russian Foundation for Basic Research (Project No. 18-29-11044). A.P.Z. appreciate the support from the Ministry of Science and Higher Education of the Russian Federation within the governmental order for the Institute of Solid State Chemistry and Mechanochemistry of SB RAS (project No. FWUS-2021-0004). D.Yu.K. is grateful to the Council on grants of the President of the Russian Federation (scholarship No. SP-3221.2022.1) for supporting the studies devoted to obtaining advanced ceramic materials. A.A.B. O.O.Sh. and E.K.P. grateful to the State Assignment of the Ministry of Science and Higher Education of the Russian Federation (topic No. 00657-2020-0006) for supporting the SEM images obtaining. The work was partially done at the shared research center SSTRC on the basis of the VEPP-4–VEPP-2000 complex at Budker Institute of Nuclear Physics of Siberian Branch of Russian Academy of Sciences . - ISSN 0272-8842. - ISSN 1873-3956
Кл.слова (ненормированные):
Composites -- BaTiO3 and titanates -- TiO2 -- Thermoelectric performance
Аннотация: The paper presents the results of preparing biphase SrTiO3–TiO2 ceramics as a promising system for n-type thermoelectrics using the features of a two-dimensional electron gas. Ceramics was obtained by reactive spark plasma sintering of SrCO3 and TiO2. The dynamics of phase transformations are shown; it is clarified that phase transformations are not the driving force of sintering. The mutual stabilization of the SrTiO3 and TiO2 phases is shown. Unique data on the assessment of the temperature gradient in the system have been obtained. A comparison of the thermoelectric characteristics of biphasic ceramics and its constituent phases allows concluding that the role of the two-dimensional electron gas is reduced to modulating the properties of bulk phases. Clear signs of size quantization were detected by the X-ray luminescence method, which is expressed in the blueshift of the luminescence spectrum by 22.3 ± 0.8 meV.

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Держатели документа:
SEC “Advanced Ceramic Materials”, Far Eastern Federal University, 10 Ajax Bay, Russky Island, Vladivostok, 690922, Russian Federation
Institute of Solid-State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, 18 Kutateladze Street, Novosibirsk630128, Russian Federation
Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 1 Nikol'skiy Prospekt, Kol'tsovo, 630559, Russian Federation
Laboratory of Physics of Magnetic Phenomena, L.V. Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, 50 Akademgorodok Street, Krasnoyarsk, 660036, Russian Federation
Laboratory of Nuclear Technology, Department of Nuclear Technology, Institute of Science-Intensive Technologies and Advanced Materials, Far Eastern Federal University, 10 Ajax Bay, Russky Island, Vladivostok, 690922, Russian Federation
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 5 Acad. Lavrentiev Avenue, Novosibirsk, 630090, Russian Federation
Institute for Automation and Control Processes, Far Eastern Branch, Russian Academy of Sciences, 5 Radio Street, Vladivostok, 690041, Russian Federation

Доп.точки доступа:
Zavjalov, A. P.; Lyubas, G. A.; Sharafutdinov, M. R.; Tarasov, I. A.; Тарасов, Иван Анатольевич; Belov, A. A.; Shichalin, O. O.; Papynov, E. K.; Kriventsov, V. V.; Kosyanov, D. Y.
}
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Modification of polycaproamide composites based on 1H,1H,13H-rihydroperfluorotridecan-1-ol and montmorillonite / S. V. Kudashev, A. A. Kondrasenko, A. N. Maiulev [et al.] // Fibre Chem. - 2022. - Vol. 53, Is. 5. - P. 291-295, DOI 10.1007/s10692-022-10287-5. - Cited References: 24 . - ISSN 0015-0541
Кл.слова (ненормированные):
Decomposition -- Nuclear magnetic resonance spectroscopy -- Macromolecular chain -- Macroradicals -- NMR-spectroscopy -- Organoclays -- Paramagnetic centers -- Polycaproamides -- Polymer composite -- Possible mechanisms -- Stabilizing effects -- X ray structure analysis -- Clay minerals
Аннотация: Modification of polycaproamide by 1H,1H,13H-trihydroperfluorotridecan-1-ol immobilized on montmorillonite produced an F-containing polymer composite. The structure of the resulting composite was investigated using x-ray structure analysis and solid-state 19F NMR spectroscopy. The polymorphous composition of this heterochain polymer was shown to reorganize to enhance its thermal stability and diminish its flammability. Possible mechanisms for the stabilizing effect of the used modifier that were related to the involvement of organo-clay paramagnetic centers in the binding of macroradicals formed during thermal decomposition of macromolecular chains were discussed.

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Держатели документа:
Volgograd State Technical University, Volgograd, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Sebryakovskii Filial, Volgograd State Technical University, Volgograd Region, Mikhailovka, Russian Federation
L. V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
I. M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation

Доп.точки доступа:
Kudashev, S. V.; Kondrasenko, A. A.; Кондрасенко, Александр Александрович; Maiulev, A. N.; Мацулев, Александр Николаевич; Babkin, V. A.; Belousova, V. S.; Andreev, D. S.; Zheltobryukhov, V. F.; Kuznetsova, N. V.
}
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Study of the effect of modified montmorillonite as a filler on the properties of composite granules based on polycaprolactone / N. L. Ertiletskaya, A. A. Sukhanova, A. N. Boyandin [et al.] // Tech. Phys. Lett. - 2022. - Vol. 48, Is. 3. - P. 59-61, DOI 10.21883/TPL.2022.03.53527.19055. - Cited References: 10. - This research was funded by the grant ”Ecological products with prolonged release of biologically active substances for potato nematode control“ MK-4374.2021.5 No. 075-15-2021-059 dated 16.04.2021 . - ISSN 1063-7850. - ISSN 1090-6533
Кл.слова (ненормированные):
polycaprolactone -- montmorillonite -- composites -- crystallinity -- melting point
Аннотация: The paper presents the results of a study of the effects of the "Monament-101" filler and the method of obtaining on the properties of composite granules based on polycaprolactone (PCL). DSC and X-ray diffraction analysis showed an increase in the degree of crystallinity from 52 to 67% and a slight decrease in the melting point (by 2°C) as the clay was introduced into the polymer.

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Публикация на русском языке Исследование влияния модифицированного монтмориллонита, используемого в качестве наполнителя, на свойства композитных гранул из поликапролактона [Текст] / Н. Л. Ертилецкая, А. А. Суханова, А. Н. Бояндин [и др.] // Письма в Журн. технич. физ. - 2022. - Т. 48 Вып. 6. - С. 28-31

Держатели документа:
Siberian State University of Science and Technology, Krasnoyarsk, Russia
Krasnoyarsk State Agrarian University, Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Siberian State University of Science and Technology, Krasnoyarsk, Russia

Доп.точки доступа:
Ertiletskaya, N. L.; Sukhanova, A. A.; Boyandin, A. N.; Shalygina, T. A.; Kozyr, O. A.; Vasiliev, A. D.; Васильев, Александр Дмитриевич
}
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Bacterial cellulose (BC) and BC composites: Production and properties / T. G. Volova, S. V. Prudnikova, E. G. Kiselev [et al.] // Nanomaterials. - 2022. - Vol. 12, Is. 2. - Ст. 192, DOI 10.3390/nano12020192. - Cited References: 113. - This research was financially supported by the State Assignment of the Ministry of Science and Higher Education of the Russian Federation No. FSRZ-2020-0006 . - ISSN 2079-4991

РУБ Chemistry, Multidisciplinary + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
SILVER NANOPARTICLES
GLUCONACETOBACTER-HANSENII
MICROBIAL CELLULOSE
Кл.слова (ненормированные):
bacterial cellulose -- composites -- production -- properties
Аннотация: The synthesis of bacterial cellulose (BC) by Komagataeibacter xylinus strain B-12068 was investigated on various C-substrates, under submerged conditions with stirring and in static surface cultures. We implemented the synthesis of BC on glycerol, glucose, beet molasses, sprat oil, and a mixture of glucose with sunflower oil. The most productive process was obtained during the production of inoculum in submerged culture and subsequent growth of large BC films (up to 0.2 m2 and more) in a static surface culture. The highest productivity of the BC synthesis process was obtained with the growth of bacteria on molasses and glycerol, 1.20 and 1.45 g/L per day, respectively. We obtained BC composites with silver nanoparticles (BC/AgNPs) and antibacterial drugs (chlorhexidine, baneocin, cefotaxime, and doripenem), and investigated the structure, physicochemical, and mechanical properties of composites. The disc-diffusion method showed pronounced antibacterial activity of BC composites against E. coli ATCC 25922 and S. aureus ATCC 25923.

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Держатели документа:
Siberian Fed Univ, Sch Fundamental Biol & Biotechnol, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Inst Biophys SB, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, LV Kirensky Inst Phys SB, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Fed Res Ctr, 50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Sch Petr & Gas Engn, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Volova, Tatiana G.; Prudnikova, Svetlana V.; Kiselev, Evgeniy G.; Nemtsev, I. V.; Немцев, Иван Васильевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Kuzmin, Andrey P.; Shishatskaya, Ekaterina I.; Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0006]
}
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Enhancement of thermoelectric performance in Bi0.5Sb1.5Te3 particulate composites including ferroelectric BaTiO3 nanodots / Y. Cheng, J. Yang, Y. Luo [et al.] // ACS Appl. Mater. Interfaces. - 2022. - Vol. 14, Is. 32. - P. 37204-37212, DOI 10.1021/acsami.2c10424. - Cited References: 40. - This work was supported by the National Natural Science Foundation of China (51772019, 51572098, and 51632006) and the NSFC-Royal Society joint project (51811530307 and IEC\NSFC\170290) . - ISSN 1944-8244
Кл.слова (ненормированные):
thermoelectric -- ferroelectric -- BaTiO3 -- Bi0.5Sb1.5Te3 -- coupling
Аннотация: An increasing number of studies have reported producing composite structures by combining thermoelectric and functional materials. However, combining energy filtering and ferroelectric polarization to enhance the dimensionless figure of merit thermoelectric ZT remains elusive. Here we report a composite that contains nanostructured BaTiO3 embedded in a Bi0.5Sb1.5Te3 matrix. We show that ferroelectric BaTiO3 particles are evenly composited with Bi0.5Sb1.5Te3 grains reducing the concentration of free charge carriers with increasing BaTiO3 content. Additionally, as a result of the energy-filtering effect and ferroelectric polarization, the Seebeck coefficient was improved by ∼10% with a ∼10% improvement in power factors. The BaTiO3 phase can effectively scatters phonons reducing lattice thermal conductivity κl (0.5 W m–1 K–1) and increasing ZT to 1.31 at 363 K in Bi0.5Sb1.5Te3 composites with 2 vol % BaTiO3 content giving an improvement of ∼25% over pure Bi0.5Sb1.5Te3. Our work indicates that the introduction of ferroelectric nanoparticles is an effective method for optimizing the ZT of Bi0.5Sb1.5Te3-based thermoelectric materials.

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Держатели документа:
State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Hubei Province, Wuhan, 430074, China
Kirensky Institute of Physics, Federal Research Center Ksc Sb Ras, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660036, Russian Federation
School of Engineering, London South Bank University, 103 Borough Road, London, SE1 0AA, United Kingdom
School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, United Kingdom

Доп.точки доступа:
Cheng, Y.; Yang, J.; Luo, Y.; Li, W.; Vtyurin, A. N.; Втюрин, Александр Николаевич; Jiang, Q.; Dunn, S.; Yan, H.
}
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Synthesis and synergistic effect of antibacterial composites based on concentrated hydrosols of silver nanoparticles combined with cephalosporins antibiotics / S. A. Vorobyev, G. V. Novikova, A. V. Demina [et al.] // Inorg. Chem. Commun. - 2022. - Vol. 144. - Ст. 109862, DOI 10.1016/j.inoche.2022.109862. - Cited References: 49. - This research was supported by the Russian Science Foundation, project 18-73-00142 . - ISSN 1387-7003
Кл.слова (ненормированные):
Silver nanoparticles -- Concentrated hydrosols -- Cephalosporin antibiotics -- Antibacterial activity -- Minimal inhibitory concentration
Аннотация: Silver nanoparticles may be used as potential antimicrobial agents. Concentrated silver nanoparticles (AgNPs) were synthesised by the Carey Lee method. Then, antibiotics, such as disodium ceftriaxone, sodium cefotaxime, sodium cefazolin and sodium cefoperazone, were added to the AgNPs at the ratio of AgNPs:antibiotic = 5:1. The concentrated hydrosols were examined using UV–Vis, FTIR-spectroscopy, dynamic light scattering and transmission electron microscopy. The spectra plasmon resonance of silver nanoparticles and their combination with antibiotics had a single strong peak at 412–415 nm. The transmission electron microscopy micrographs showed different forms. The average size of AgNPs-antibiotic particles was smaller than that of AgNPs. The antibacterial activities of AgNPs, antibiotics and AgNPs-antibiotics were determined by the disk diffusion method against Staphylococcus aureus and Escherichia coli. The most significant enhancement of the antibacterial effect over the antibiotic was demonstrated by AgNPs-disodium ceftriaxone against E.coli. Also, the minimal inhibitory concentration (MIC) of the AgNPs-antibiotics was defined. All the AgNPs-antibiotic exhibited a synergistic enhancement by AgNPs and the antibiotic of antibacterial activity. A possible explanation of this phenomenon was proposed. Our results suggest that the synthesis of the concentrated hydrosol of the AgNPs-antibiotics is essential for studying similar nanosystems.

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Держатели документа:
Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of sciences, Krasnoyarsk, 660036, Russian Federation
School of Non-Ferrous Metals and Material Science, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
School of Fundamental Biology and Biotechnology, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Vorobyev, S. A.; Novikova, G. V.; Demina, A. V.; Shidlovskiy, I. P.; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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10.

Near zero thermal expansion in metal matrix composites based on intermediate valence systems: Al/SmB6 / D. A. Serebrennikov, A. A. Bykov, A. L. Trigub [et al.] // Results Phys. - 2021. - Vol. 21. - Ст. 103843, DOI 10.1016/j.rinp.2021.103843. - Cited References: 45. - This work was supported by the Russian Foundation for Basic Research , grant 18-32-00583 mol_a and by the State assignment of Russia , project FZWM-2020-0008. We are grateful to V.N. Leitsin for his support in the experimental studies . - ISSN 2211-3797
Кл.слова (ненормированные):
Metal-matrix composites (MMCs) -- Intermediate valence systems -- Negative thermal expansion -- Invar alloys
Аннотация: This work is focused on the fabrication and characterization of a new type of composite invar materials combining near-zero thermal expansion and functional properties that are important for applications. This is accomplished through the use of particles of SmB6, an intermediate valence system with negative thermal expansion, embedded in Al matrix. The composite based on SmB6-21 vol% was fabricated by hot pressing and was characterized by XRD, optical/electron microscopy, X-ray computed tomography and capacitive dilatometry. The study of thermal expansion revealed that the sample exhibits invar behaviour up to ~60 K with a zero value of the coefficient of thermal expansion near 45 K. In comparison to pure aluminum, the temperature range has increased by about 20 K. A quantitative analysis of dilatometric experimental data performed on the basis of widely used theoretical models showed that the thermal expansion of the Al/SmB6 composite was well reproduced within the Turner model.

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Держатели документа:
REC “Functional Nanomaterials”, Immanuel Kant Baltic Federal University, Kaliningrad, 236016, Russian Federation
Petersburg Nuclear Physics Institute, Gatchina, 188300, Russian Federation
NRC «Kurchatov Institute», Moscow, 123182, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Vladimir State University, Vladimir, 600000, Russian Federation

Доп.точки доступа:
Serebrennikov, D. A.; Bykov, A. A.; Trigub, A. L.; Kolyshkin, N. A.; Freydman, A. L.; Фрейдман, Александр Леонидович; Aborkin, A. V.; Tovpinets, A. O.; Clementyev, E. S.; Goikhman, A. Y.
}
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