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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova, Tatiana G., Zhila, Natalia O., Kiselev, Evgeniy G., Sukovatyi, Aleksey G., Lukyanenko A. V., Shishatskaya, Ekaterina I.
Заглавие : Biodegradable polyhydroxyalkanoates with a different set of valerate monomers: Chemical structure and physicochemical properties
Колич.характеристики :21 с
Место публикации : Int. J. Mol. Sci. - 2023. - Vol. 24, Is. 18. - Ст.14082. - ISSN 16616596 (ISSN), DOI 10.3390/ijms241814082. - ISSN 14220067 (eISSN)
Примечания : Cited References: 99. - The study was funded by the Russian Science Foundation (project no. 23-64-10007)
Аннотация: The properties, features of thermal behavior and crystallization of copolymers containing various types of valerate monomers were studied depending on the set and ratio of monomers. We synthesized and studied the properties of three-component copolymers containing unusual monomers 4-hydroxyvalerate (4HV) and 3-hydroxy-4-methylvalerate (3H4MV), in addition to the usual 3-hydroxybutyrate (3HB) and 3-hydroxyvalerate (3HV) monomers. The results showed that P(3HB-co-3HV-co-4HV) and P(3HB-co-3HV-co-3H4MV) terpolymers tended to increase thermal stability, especially for methylated samples, including an increase in the gap between melting point (Tmelt) and thermal degradation temperature (Tdegr), an increase in the melting point and glass transition temperature, as well as a lower degree of crystallinity (40–46%) compared with P(3HB-co-3HV) (58–66%). The copolymer crystallization kinetics depended on the set and ratio of monomers. For terpolymers during exothermic crystallization, higher rates of spherulite formation (Gmax) were registered, reaching, depending on the ratio of monomers, 1.6–2.0 µm/min, which was several times higher than the Gmax index (0.52 µm/min) for the P(3HB-co-3HV) copolymer. The revealed differences in the thermal properties and crystallization kinetics of terpolymers indicate that they are promising polymers for processing into high quality products from melts.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lin, Chun-Rong, Ivanova O. S., Edelman I. S., Knyazev Yu. V., Zharkov S. M., Petrov D. A., Sokolov A. Е., Svetlitsky E. S., Velikanov D. A., Solovyov, Leonid A., Chen, Ying-Zhen, Tseng, Yaw-Teng
Заглавие : Carbon double coated Fe3O4@C@C nanoparticles: Morphology features, magnetic properties, dye adsorption
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-52-52002]; Ministry of Science and Technology of TaiwanMinistry of Science and Technology, Taiwan [108-2923-M-153-001-MY3, 109-2112-M-153-003]; Joint Scientific Center of the Siberian Federal University [FSRZ-2020-0011]; Ministry of Science and Higher Education of the Russian Federation
Место публикации : Nanomaterials. - 2022. - Vol. 12, Is. 3. - Ст.376. - ISSN 2079-4991(eISSN), DOI 10.3390/nano12030376
Примечания : Cited References: 44. - The work was supported financially by the Russian Foundation for Basic Research, Grant No. 19-52-52002 and Ministry of Science and Technology of Taiwan, Grants MOST No. 108-2923-M-153-001-MY3 and No. 109-2112-M-153-003-. The support was obtained also from the Joint Scientific Center of the Siberian Federal University supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation, where the Transmission Electron Microscopy studies were carried out
Предметные рубрики: SOLID-PHASE EXTRACTION
FE3O4 NANOPARTICLES
PROFILE REFINEMENT
Аннотация: This work is devoted to the study of magnetic Fe3O4 nanoparticles doubly coated with carbon. First, Fe3O4@C nanoparticles were synthesized by thermal decomposition. Then these synthesized nanoparticles, 20–30 nm in size were processed in a solution of glucose at 200 °C during 12 h, which led to an unexpected phenomenon – the nanoparticles self-assembled into large conglomerates of a regular shape of about 300 nm in size. The morphology and features of the magnetic properties of the obtained hybrid nanoparticles were characterized by transmission electron microscopy, differential thermo-gravimetric analysis, vibrating sample magnetometer, magnetic circular dichroism and Mössbauer spectroscopy. It was shown that the magnetic core of Fe3O4@C nanoparticles was nano-crystalline, corresponding to the Fe3O4 phase. The Fe3O4@C@C nanoparticles presumably contain Fe3O4 phase (80%) with admixture of maghemite (20%), the thickness of the carbon shell in the first case was of about 2–4 nm. The formation of very large nanoparticle conglomerates with a linear size up to 300 nm and of the same regular shape is a remarkable peculiarity of the Fe3O4@C@C nanoparticles. Adsorption of organic dyes from water by the studied nanoparticles was also studied. The best candidates for the removal of dyes were Fe3O4@C@C nanoparticles. The kinetic data showed that the adsorption processes were associated with the pseudo-second order mechanism for cationic dye methylene blue (MB) and anionic dye Congo red (CR). The equilibrium data were more consistent with the Langmuir isotherm and were perfectly described by the Langmuir–Freundlich model.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mendez-Bermudez J. A., Luna-Acosta G. A., Seba P., Pichugin K. N.
Заглавие : Chaotic waveguide-based resonators for microlasers
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 2003. - Vol. 67, Is. 16. - Ст.161104. - ISSN 1098-0121, DOI 10.1103/PhysRevB.67.161104
Примечания : Cited References: 33
Предметные рубрики: QUANTUM-CLASSICAL CORRESPONDENCE
MORPHOLOGY-DEPENDENT RESONANCES
DIRECTIONAL EMISSION
OPTICAL CAVITIES
MICRODISK LASERS
WAVE CHAOS
DROPLETS
PRECESSION
BILLIARDS
STATES
Аннотация: We propose the construction of highly directional emission microlasers using two-dimensional high-index semiconductor waveguides as open resonators. The prototype waveguide is formed by two collinear leads connected to a cavity of certain shape. The proposed lasing mechanism requires that the shape of the cavity yield mixed chaotic ray dynamics so as to have the approplate (phase space) resonance islands. These islands allow, via Heisenberg's uncertainty principle, the appearance of quasibound states (QBSs) which, in turn, propitiate the lasing mechanism. The energy values of the QBSs are found through the solution of the Helmholtz equation. We use classical ray dynamics to predict the direction and intensity of the lasing produced by such open resonators for typical values of the index of refraction.
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4.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Lin C. R., Chen C. C., Li O., Hsu, Hua-Shu, Ivantsov R. D., Zharkov S. M., Edelman I. S., Velikanov D. A., Ovchinnikov S. G.
Заглавие : Chemically synthesized Cu1-xFexCr2Se4 nanoparticles. Morphology and magnetic properties
Коллективы : International Conference on Magnetism
Место публикации : 20th Int. Conf. on Magnetism (ICM-2015): book of abstracts. - 2015. - Ст.TU.F-P88
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5.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Chekanova L. A., Denisova E. A., Mel'nikova S. V., Iskhakov R. S.
Заглавие : Composite magnetic materials based on porous templates with different pores morphology: synthesis and magnetic properties
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - С. 169. - ISBN 978-5-7444-3124-2
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6.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Bartolomé J., Badía-Romano L., Rubín J. , Bartolomé F., Magén C., Bürgler D. E., Rubio-Zuazo J., Castro G. R. , Varnakov S. N., Yakovlev I. A., Tarasov I. A., Platunov M. S., Ovchinnikov S. G.
Заглавие : Composition and morphology of Fe-Si interfaces and (Fe/Si)3 multilayer nanostructures
Коллективы : International Conference on Magnetism
Место публикации : 20th Int. Conf. on Magnetism (ICM-2015): book of abstracts. - 2015. - Ст.WE.J.2_I1
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Anshits N. N. , Salanov A. N., Vereshchagina T. A., Kruchek D. M., Bayukov O. A., Tretyakov A. A., Revenko Y. A., Anshits A. G.
Заглавие : Composition, morphology, properties of coal fly ash microspheres and their application for conditioning liquid radioactive waste
Место публикации : International Journal of Nuclear Energy Science and Technology. - 2006. - Т. 2, № 1-2. - С. 8-24. - ISSN 1741-6361. - ISSN 1741-637X(eissn)
ГРНТИ : 61
MeSH-главная:
РИНЦ
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8.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Petrov D. A., Ivantsov R. D., Zharkov S. M., Yurkin G. Yu., Molokeev M. S., Knyazev Yu. V., Lin C.-R., Tseng Y.-T.
Заглавие : Core-shell iron oxide-carbon nanoparticles modified with Ag. synthesis, morphology, magnetic properties
Коллективы : Российская академия наук, Уральское отделение РАН, Институт физики металлов им. М. Н. Михеева Уральского отделения РАН, Уральский федеральный университет им. первого Президента России Б.Н. Ельцина, Российский фонд фундаментальных исследований, Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium
Место публикации : Euro-asian symposium "Trends in magnetism" (EASTMAG-2019): Book of abstracts/ чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст.J.P18. - P.220-221. - ISBN 978-5-9500855-7-4 (Шифр В33/E12-125657784)
Примечания : Cited References: 2. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project No. 18-42-243021 and by Joint Research Project of Russian Foundation for Basic Research and Ministry of Science and Technology, Taiwan MOST No. 19-52-52002
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9.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ivanova O. S., Edelman I. S., Svetlitsky E. S., Sokolov A. Е., Zharkov S. M., Petrov D. A., Sukhachev A. L., Toropova E. S., Chun-Rong Lin, Ying-Zhen Chen
Заглавие : Core-shell magnetite nanoparticles: morphology, magnetic properties, organic dyes adsorption
Коллективы : "Functional materials", International conference, Крымский федеральный университет имени В.И. Вернадского
Место публикации : Ovchinnikov S. G. International conference "Functional materials": book of abstracts/ ed. V. N. Berzhansky ; org. com. S. G. Ovchinnikov [et al.]. - Simferopol, 2023. - P.114
Примечания : Cited References: 1. - РФН № 23-22-10025
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shi P. L., Xia, Zhiguo, Molokeev M. S., Atuchin V. V.
Заглавие : Crystal chemistry and luminescence properties of red-emitting CsGd1−xEux(MoO4)2 solid-solution phosphors
Место публикации : Dalton Trans.: Royal Society of Chemistry, 2014. - Vol. 43, Is. 25. - P.9669-9676. - ISSN 1477-9226, DOI 10.1039/C4DT00339J. - ISSN 1477-9234
Примечания : Cited References: 46. - The present work was supported by the National Natural Science Foundations of China (grant no. 51002146, 51272242), Natural Science Foundations of Beijing (2132050), the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0950), Beijing Nova Program (Z131103000413047), Beijing Youth Excellent Talent Program (YETP0635), the Fundamental Research Funds for the Central Universities (2-9-2014-044), and the Funds of the State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University (KF201306). V. V. A. gratefully acknowledges the Ministry of Education and Science of the Russian Federation for the financial support.
Предметные рубрики: WHITE-LIGHT
VIBRATIONAL PROPERTIES
HYDROTHERMAL SYNTHESIS
SINGLE-CRYSTALS
DIODES
EFFICIENCY
PHOTOLUMINESCENCE
CSGD(MOO4)2
MORPHOLOGY
GROWTH
Аннотация: Scheelite related alkali-metal rare-earth double molybdate compounds with a general formula of ALn(MoO4)2 can find wide application as red phosphors. The crystal chemistry and luminescence properties of red-emitting CsGd1−xEux(MoO4)2 solid-solution phosphors have been evaluated in the present paper. A detailed analysis of the structural properties indicates the formation of isostructural scheelite-type CsGd1−xEux(MoO4)2 solid-solutions over the composition range of 0 ≤ x ≤ 1. The photoluminescence emission (PL) and excitation (PLE) spectra, and the decay curves were measured for this series of compounds. The critical doping concentration of Eu3+ is determined to be x = 0.6 in order to realize the maximum emission intensity. The emission spectra of the as-obtained CsGd(1−x)Eux(MoO4)2 phosphors show narrow high intensity red lines at 592 and 615 nm upon excitation at 394 or 465 nm, revealing great potential for applications in white light-emitting diode devices.
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