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Aksenov, S. V.
Strong Coulomb interactions in the problem of Majorana modes in a wire of the nontrivial topological class BDI / S. V. Aksenov, A. O. Zlotnikov, M. S. Shustin // Phys. Rev. B. - 2020. - Vol. 101, Is. 12. - Ст. 125431, DOI 10.1103/PhysRevB.101.125431. - Cited References: 60. - We acknowledge fruitful discussions with V. V. Valkov and V. A. Mitskan. The reported study was funded by the RAS Presidium programs for fundamental research Nos. 12 and 32, Russian Foundation for Basic Research (Projects No. 18-32-00443 and No. 19-02-00348), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project: "Coulomb interactions in the problem of Majorana modes in low-dimensional systems with nontrivial topology" (Grant No. 19-42-240011). S.V.A. and A.O.Z. are grateful to the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools, Projects No. MK-1641.2020.2 and No. MK-3594.2018.2. S.V.A. acknowledges the support from the Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" (Grant No. 18-46-007). . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
QUANTUM
   POLARIZATION
   TRANSITION
   FERMIONS
   SPECTRUM
   STATE
Аннотация: In this study, the problem of strong Coulomb interactions in topological superconducting wire is analyzed by means of the density-matrix-renormalization-group (DMRG) approach. To analyze properties of edge states in the BDI-class structure, a quantity called Majorana polarization is used. From its dependence on wire length and an entanglement-spectrum degeneracy, topological phase diagrams are obtained. The DMRG calculations for the Shubin-Vonsovsky-type model of the wire show the transformation of phases with Majorana single and double modes (MSMs and MDMs, respectively) under the increase of onsite and intersite correlations. In particular, we demonstrate different scenarios including the possibilities of both induction and suppression of the MSMs and MDMs. It is shown that in the strongly correlated regime, the contributions of single-particle excitations to the Majorana-type states significantly decrease at low magnetic fxields. Moreover, the t-J*-V model is derived allowing to study the effective interactions and improve the DMRG numerics. It is found out that in the limiting case of the effective Hamiltonian with infinitely strong onsite repulsion, t model, the topological phases are destroyed. Finally, the ways to probe the MSMs and MDMs via the features of caloric functions are discussed.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Zlotnikov, A. O.; Злотников, Антон Олегович; Shustin, M. S.; Шустин, Максим Сергеевич; Аксенов, Сергей Владимирович; RAS Presidium programs for fundamental research [32, 12]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-32-00443, 19-02-00348]; Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [19-42-240011]; Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific SchoolsLeading Scientific Schools Program [MK-1641.2020.2, MK-3594.2018.2]; Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" [18-46-007]
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    Anionic-cationic surfactant mixture providing the electrically controlled homeotropic surface anchoring of liquid crystals / M. N. Krakhalev [et al.] // J. Mol. Liq. - 2019. - Vol. 282: Suzdal Conference (2018, Suzdal, RUSSIA). - P. 57-62, DOI 10.1016/j.molliq.2019.02.132. - Cited References: 30. - The reported study was supported by the Belarusian Republican Foundation for Fundamental Research (project No X16P-110) and Russian Foundation for Basic Research (RFBR) (project No 16-53-00073). Mikhail N. Krakhalev and Vitaly S. Sutormin acknowledge financial support from RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (project No 18-42-243006). . - ISSN 0167-7322. - ISSN 1873-3166
   Перевод заглавия: Смесь анионного и катионного сурфактантов, обеспечивающая электроуправляемое гомеотропное поверхностное сцепление в жидких кристаллах

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
IONIC MODIFICATION
   TRANSITION
   DROPLETS
   CONFIGURATION
   LAYER
Кл.слова (ненормированные):
Polymer dispersed liquid crystal -- Nematic droplet -- Ionic surfactant -- Anchoring transition -- Director configuration -- Optical texture
Аннотация: In search of a substance able to function as an anionic surfactant applied for the electrically-induced anchoring transitions in liquid crystals, the compound 4-heptyloxybenzoate benzyl dodecyldimethylammonium (HOBBDDA) has been synthesized. Its orienting influence on nematic liquid crystal 4-pentyl-4'-cyanobiphenyl (5CB) has been tested. HOBBDDA dissolved up to 1.4%in 50 droplets dispersed in polymer film does not change the tangential surface anchoring inherent to polyvinyl alcohol matrix used. Homeotropic surface anchoring is realized if the HOBBDDA content exceeds 1.7%. The molecules of the surfactant in 5CB dissociate into anions and cations. The anions modify the surface anchoring under the action of DC electric field both in the normal and inverse mode. The mixture of HOBBDDA and cetyltrimethylammonium bromide can function as a binary ionic cationic surfactant which significantly expands the prospects for using the ionic-surfactant method to control liquid crystal materials. (C) 2019 Elsevier B.V. All rights reserved.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Belarusian State Technol Univ, Minsk 220006, BELARUS.

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Kuz'menok, N. M.; Mikhalyonok, S. G.; Bezborodov, V. S.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Belarusian Republican Foundation for Fundamental Research [X16P-110]; Russian Foundation for Basic Research (RFBR) [16-53-00073]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-243006]; International conference on Hole Burning, Single Molecule, and Related Spectroscopies: Science and Applications - 2018(XIII ; August 6-12, 2018 ; Suzdal - Moscow, Russia)
}
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    Broadband light emitting zero-dimensional antimony and bismuth-based hybrid halides with diverse structures / C. K. Deng, S. Q. Hao, K. J. Liu [et al.] // J. Mater. Chem. C. - 2021. - Vol. 9, Is. 44. - P. 15942-15948, DOI 10.1039/d1tc04198c. - Cited References: 52. - This work was supported by Beijing Municipal Natural Science Foundation (2182080) and the National Natural Science Foundation of China (51972021 and 51702329). The work was partly supported by the Fundamental Research Funds for the Central Universities (FRF-IDRY-19-005) and by the RFBR according to the research project No. 19-52-80003. S. H. and C. W. (DFT calculations) acknowledge support from the Department of Energy, Office of Science Basic Energy Sciences under Grant DE-SC0014520. Access to QUEST, the supercomputing resources facilities at Northwestern University, is also acknowledged . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Широкополосное излучение от нульмерных гибридных галогенидов на основе сурьмы и висмута с разнообразной структурой

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
CRYSTAL-STRUCTURE
   LONE-PAIR
   EMISSION
   PEROVSKITES
   TIN
   LUMINESCENCE
Аннотация: Low-dimensional organic–inorganic metal halides have recently attracted extensive attention because of their various structures and distinguished photoelectric properties. Herein, we report a series of new zero-dimensional organic–inorganic hybrid metal halides: (TMEDA)3Bi2Cl12·H2O, (TMEDA)3Bi2Br12·H2O, (TMEDA)3Sb2Br12·H2O, and (TMEDA)5Sb6Cl28·2H2O [TMEDA = N,N,N′·trimethylethylenediamine]. (TMEDA)3M2X12·H2O (M = Bi or Sb, X = Cl or Br) crystallizes in the monoclinic space group P21/n, and (TMEDA)5Sb6Cl28·2H2O crystallizes in the orthorhombic space group Pnma. (TMEDA)3M2X12 possesses a zero-dimensional structure with the metal halide ions of [MBr6]3− isolated by the organic TMEDA2+ cations. Interestingly, the (TMEDA)5Sb6Cl28·2H2O structure consists of a combination of corner-connected octahedra [Sb4Cl18]6− and edge-shared [Sb2Cl10]4−, which is quite rare. The light emission of all these compounds was measured, and (TMEDA)3Sb2Br12·H2O exhibits the most intense luminescence. Upon 400 nm ultraviolet light excitation, (TMEDA)3Sb2Br12·H2O exhibited strong broadband yellow emission centered at 625 nm with a full-width at half-maximum of ∼150 nm originating from self-trapped excitons. This work suggests the possibility of new types of hybrid halides by introducing different metal centers and probing the structural evolution and photoluminescent properties, serving as a reference for the relationship between structure and luminescent performance and demonstrating their potential use as phosphors in light-emitting diodes.

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Держатели документа:
Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China.
Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
RAS, SB, Lab Crystal Phys, Kirensky Inst Phys,Fed Res Ctr KSC, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Shanxi Normal Univ, Sch Chem & Mat Sci, Key Lab Magnet Mol & Magnet Informat Mat, Minist Educ, Linfen 041004, Shanxi, Peoples R China.

Доп.точки доступа:
Deng, Chenkai; Hao, Shiqiang; Liu, Kunjie; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wolverton, Christopher; Fan, Liubing; Zhou, Guojun; Chen, D.a.; Zhao, Jing; Liu, Quanlin; Beijing Municipal Natural Science FoundationBeijing Natural Science Foundation [2182080]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51972021, 51702329]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [FRF-IDRY-19-005]; RFBRRussian Foundation for Basic Research (RFBR) [19-52-80003]; Department of Energy, Office of Science Basic Energy SciencesUnited States Department of Energy (DOE) [DE-SC0014520]
}
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    Effect of intensive plastic deformation on structure and magnetic properties of Al2O3/Co(P) nanocomposite particles / Е. А. Денисова [et al.] // V International conference "Fundamental bases of mechanochemical technologies". FBMT- 2018 : book of abstracts : [25-28 June 2018, Novosibirsk, Russia]. - 2018. - P. 141 . - ISBN 978-5-4437-0794-5
   Перевод заглавия: Модификация структуры и магнитных свойств нанокомпозитных частиц Al2O3/Co(P) под воздействием интенсивной пластической деформации

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Kuzovnikova, L. A.; Кузовникова, Людмила Александровна; Denisova, E. A.; Денисова, Елена Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Nemtsev, I. V.; Немцев, Иван Васильевич; Shepeta, N. A.; Fundamental Bases of Mechanochemical Technologies, International Conference(5 ; 2018 ; June ; Novosibirsk); "Фундаментальные основы механохимических технологий", международная конференция(5 ; 2018 ; июнь ; Новосибирск); Институт химии твердого тела и механохимии Сибирского отделения РАН; Новосибирский государственный университет
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Efficiency of high energy impact in synthesis of coal-water suspensions / L. V. Kashkina [et al.] // Mater. Today: Proc. - 2018. - Vol. 5, Is. 12, Pt. 3. - P. 26033-26037, DOI 10.1016/j.matpr.2018.08.024. - Cited References: 18 . - ISSN 2214-7853
Кл.слова (ненормированные):
Coal-water slurry -- Cavitation -- Nanocarbon -- Man-made gas emission
Аннотация: A study of thermophysical and ecological properties of highly loaded (50% mass.) coal-water slurry based on Kansk-Achinsk brown coal and distilled water (coal-water slurry fuel – CWSF) with exposure of used water to cavitation-treatment, microwave processing of coal powder, T-900 nanocarbon additions is presented. The study shows that under the conditions of this experiment the thermal physical properties of CWSF are most affected by the use of cavitation-activated water.

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Держатели документа:
Siberian Federal University, Svobodnyy Ave 79, Krasnoyarsk 660049, Russia
Federal Research Center «Krasnoyarsk Research Center (Russian Academy of Sciences, Siberian Branch») L.V. Kirensky Institute of Physics, SB RAS, Akademgorodok 50 bld. 38, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Kashkina, L. V.; Stebeleva, O. P.; Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Cherepakhin, A. V.; Черепахин, Александр Владимирович; Carbon: Fundamental Problem, Material Science, Technology - International Conference(11th ; 29 May - 1 June 2018 ; Troitsk, Moscow)
}
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    Euro-asian symposium "Trends in magnetism" (EASTMAG-2004) : Abstract book / Рос. акад. наук, Сиб. отд-ние, Ин-т физики им. Л.В. Киренского, Краснояр. гос. ун-т, Краснояр. гос. технич. ун-т, Урал. отд-ние , Ин-т физики металлов. Euro-asian symp. "Trends in magnetism" ; предс. орг. комит. К. С. Александров ; зам. предс. С. Г. Овчинников ; чл. орг. комит. В. А. Игнатченко [и др.]. - Krasnoyarsk : [б. и.], 2004. - 418 с. - Bibliogr. at the end of the articles - Auth. ind. - 350 экз. - Б. ц.
Перевод заглавия: Евро-азиатский симпозиум "Прогресс в магнетизме"
Приложение:
Program of Euro-asian symposium "Trends in magnetism" (EASTMAG-2004). - Krasnoyarsk : Kirensky Instit. Phys. SB RAS, 2004. - 83
    Содержание:
Fundamental magnetic properties
Transport phenomena and spin electronics
Magnetism and strongly correleted electron systems
Spin glasses, disordered magnetic systems
Dynamics of spin systems and magnetic resonances
Magnetooptics and X-ray magnetooptics
Magnetic mechanism of the superconductivity
Domain structure and magnetization processes
Thin magnetic films and multilayers
Magnetic particles and nanocrystalline materials
Molecular magnetism
Magnetic storage/memory and applications
   Перевод заглавия: Евро-азиатский симпозиум "Прогресс в магнетизме"

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Александров, Кирилл Сергеевич \предс. орг. ком.\; Aleksandrov, K. S.; Овчинников, Сергей Геннадьевич \зам. предс.\; Ovchinnikov, S. G.; Игнатченко, Вальтер Алексеевич \чл. орг. ком.\; Ignatchenko, V. A.; Сапожников, В. \чл. орг. ком.\; Патрин, Геннадий Семёнович \чл. орг. ком.\; Patrin, G. S.; Вальков, Валерий Владимирович \чл. орг. ком.\; Val'kov, V. V.; Волков, Никита Валентинович \чл. орг. ком.\; Volkov, N. V.; Казак, Наталья Валерьевна \чл. орг. ком.\; Kazak, N. V.; Российская академия наук; Сибирское отделение РАН; Институт физики им. Л.В. Киренского Сибирского отделения РАН; Красноярский государственный университет; Красноярский государственный технический университет; Институт физики металлов Уральского отделения РАН; Научный совет по физике конденсированных сред РАН; Научный совет РАН по физике низких температур; Красноярский научный центр Сибирского отделения РАН; Euro-asian symposium "Trends in magnetism" (2 ; 2004 ; Aug. 24-27 ; Krasnoyarsk); "Trends in magnetism", Euro-Asian Symposium (2 ; 2004 ; Aug. 24-27 ; Krasnoyarsk)
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Evolution of the optical absorption spectra and electronic structure of the VBO3 crystal under high pressures / N. V. Kazak [et al.] // J. Exp. Theor. Phys. - 2009. - Vol. 109, Is. 3. - P. 455-465, DOI 10.1134/S1063776109090118. - Cited References: 27. - We would like to thank A. D. Vasil'ev for performing the X-ray diffraction investigations.This study was supported by the Russian Foundation for Basic Research (project nos. 07-02-00490a, 08-02-00897a, 08-02-90708 mob_st, 09-02-00171a, and 07-02-00226), the Federal Agency for Science and Innovation (Rosnauka) (project no. MK-4278.2008.2, contract no. 01.164.12.HB11), and the Branch of Physical Sciences of the Russian Academy of Sciences within the framework of the program "Strongly Correlated Electrons." . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
BAND-STRUCTURE
   PHASE-TRANSITION
   FEBO3
   FE1-XVXBO3
   STATE
   MODEL
Кл.слова (ненормированные):
Charge-transfer excitations -- D-d transitions -- Ferromagnetic semiconductor -- Fundamental absorption edge -- High pressure -- Optical absorption spectrum -- Absorption -- Boron -- Boron compounds -- Electronic properties -- Electronic structure -- Optical materials -- Oxygen -- Vanadium -- Light absorption
Аннотация: The evolution of optical absorption spectra of the ferromagnetic semiconductor VBO3 under high pressures up to 70 GPa has been investigated. It has been revealed that, below the fundamental absorption edge (E (g1) = 3.02 eV), the spectra exhibit a series of bands V1 (2.87 eV), V2 (2.45 eV), V3 (1.72 eV), and V4(1.21 eV) due to the d-d transitions in the V3+ ion and charge-transfer excitations. A model of the electronic structure of the VBO3 semiconductor has been constructed. This model combines the one-electron description of the s and p states of boron and oxygen and the many-electron description of the vanadium d states.

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Публикация на русском языке Эволюция спектров оптического поглощения и электронной структуры в кристалле VBO[3] при воздействии высоких давлений [Текст] / Н. В. Казак [и др.] // Журн. эксперим. и теор. физ. - 2009. - Т. 136 Вып. 3. - С. 531-542

Держатели документа:
[Kazak, N. V.
Ovchinnikov, S. G.
Edel'man, I. S.
Rudenko, V. V.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Gavriliuk, A. G.
Lyubutin, I. S.] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
[Gavriliuk, A. G.] Russian Acad Sci, Inst High Pressure Phys, Troitsk 142190, Moscow Oblast, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow 119333, Russian Federation
Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow oblast 142190, Russian Federation
Siberian Federal University, Svobodny pr. 79, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Gavriliuk, A. G.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Lyubutin, I. S.; Edel'man, I. S.; Edelman, I. S.; Rudenko, V. V.; Руденко, Валерий Васильевич; Russian Foundation for Basic Research [07-02-00490a, 08-02-00897a, 08-02-90708 mob_st, 09-02-00171a, 07-02-00226]; Federal Agency for Science and Innovation [MK-4278.2008.2, 01.164.12.HB11]; Russian Academy of Sciences
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Formation of phases and microstructure of ZnO and TiO2 based ceramic / G. M. Zeer [et al.] // Glass Ceram. - 2015. - Vol. 72, Is. 7-8. - P. 242-245, DOI 10.1007/s10717-015-9765-8. - Cited References:15. - This work was supported in part by the Russian Foundation for Fundamental Research (Grant No. 13-08-01003-a) and the Ministry of Education of the Russian Federation (as part of scientific research tasked by the state to the Siberian Federal University for 2014). . - ISSN 0361-7610. - ISSN 1573-8515

РУБ Materials Science, Ceramics
Рубрики:
GLASS ENAMEL COATINGS
NANOWIRES
Кл.слова (ненормированные):
electrocontact materials -- metal oxides -- zinc titanate -- nanopowders -- ceramic -- microstructure -- phase formation
Аннотация: Nanopowders of zinc and titanium oxides were used to obtain samples of Zn2TiO4-ZnO ceramic. Phase formation as well as the microstructure and elemental composition of the phases formed were studied by means of electron microscopy. The density and porosity were calculated, and the sizes of grains and pores in the ceramic were determined. The temperature at the zinc titanate forms was determined. It was shown that it corresponds to the sintering temperature of electrocontact materials with this composition. It is proposed that zinc titanate and oxide be used as arc-suppressing and dispersion-hardening additional additives in copper-based electrocontact materials.

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Публикация на русском языке Формирование фаз и микроструктуры керамики на основе ZnO и TiO2 [Текст] / Г. М. Зеер [и др.] // Стекло и керамика. - 2015. - № 7. - С. 16-19

Держатели документа:
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk, Russia.
MF Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Zeer, G. M.; Zelenkova, E. G.; Nikolaeva, N. S.; Zharkov, S. M.; Жарков, Сергей Михайлович; Pochekutov, S. I.; Ledyaeva, O. N.; Sartpaeva, A. B.; Mikheev, A. A.; Russian Foundation for Fundamental Research [13-08-01003-a]; Ministry of Education of the Russian Federation
}
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    Fundamental basis of production and application of biodegradable polyhydroxyalkanoates / T. G. Volova [et al.] // J. Sib. Fed. Univ. Biol. - 2012. - Vol. 5, Is. 3. - P. 280-299 ; Журн. СФУ. Сер. "биология"
   Перевод заглавия: Фундаментальные основы производства и применения биодеградируемых полигидроксиалканоатов
Кл.слова (ненормированные):
biopolymers -- polyhydroxyalkanoates -- substrates -- synthesis -- properties -- processing -- biomedical applications -- биополимеры -- полигидроксиалканоаты -- субстраты -- синтез -- свойства -- обработка -- медико-биологическое применение
Аннотация: Microbial polyhydroxyalkanoates (PHAs) have long been studied due to their potential for replacement of petroleum-based plastic. The study addresses the effect of different conditions of carbon nutrition on synthesis of polyhydroxyalkanoates by the bacterium Ralstonia eutropha. First and foremost, PHAs are carbon storage compounds for many organisms. There are still many aspects of the physiology of PHA accumulation and degradation that are still not understood. Measurements of key P3HBrelated enzyme activities throughout cell growth reveal correlations of acetoacetyl-CoA reductase and synthase enzyme activity maxima with P3HB biosynthesis. The investigation addressed kinetic parameters of growth and accumulation of polyhydroxyalkanoates and gas exchange parameters of the culture of the CO-resistant strain of the hydrogen bacteria Ralstonia eutropha B 5786 cultivated on synthesis gas - a product of gasification of brown coals. The results were compared with those obtained by growing the bacteria on electrolytic hydrogen and it was concluded that synthesis gas can be successfully used to produce PHAs. In experiments with wild-type strain it has been first found that under mixotrophic growth conditions - CO2 + co-substrate (alcanoic acids) - bacteria can synthesize multi-component PHAs, consisting of short- and medium-chain-length monomers with carbon chains containing 4 to 8 atoms. It has been shown that PHA composition is determined by the type of the co-substrate. Fatty acids with odd number of carbons induce bacteria to synthesize multi-component PHAs with 3-hydroxybutyrate, 3-hydroxyvalerate, and 3-hydroxyhexanoate as major monomers and 3-hydroxyheptanoate and 3-hydroxyoctanoate as minor, occasionally occurring, ones. Fatty acids with even number of carbons induce synthesis of not only their respective monomers (3-hydroxyhexanoate and 3-hydroxyoctanoate) but also 3-hydroxyvalerate, making possible synthesis of four-component PHAs, containing 3-hydroxybutyrate and 3-hydroxyhexanoate as major components. A family of short- and medium-chain-length four- and five-component PHAs has been synthesized and their physicochemical and biomedical-properties examined.
Полигидроксиалканоаты (ПГА) - перспективные материалы, которые могут заменить пластмассы на углеводородной основе, и они исследуются уже в течение длительного времени. Данная работа рассматривает воздействие различных условий углеродного питания на синтез полигидроксиалканоатов бактериями Ralstonia eutropha. Прежде всего ПГА являются запасными веществами для многих организмов. Многие аспекты физиологии накопления и разрушения ПГА остаются пока не изученными. Измерение активности ключевых ферментов 3ПГБ на протяжении роста клетки показывает связь максимумов активности ацетоацетил-КоА редуктазы и синтазы с биосинтезом 3ПГБ. Были исследованы кинетические параметры роста и накопления полигидроксиалканоатов и параметры газообмена культуры штамма водородных бактерий Ralstonia eutropha B 5786, устойчивого к СО, при культивировании на синтез-газе - продукте газификации бурых углей. Проведено сравнение полученных результатов с данными, полученными при выращивании бактерий на электролитическом водороде, и показано, что синтез-газ может успешно применяться для получения ПГА. В экспериментах с природным штаммом бактерий впервые было показано, что при миксотрофных условиях роста - CO2 + дополнительный субстрат (алкановые кислоты) - бактерии способны синтезировать многокомпонентные ПГА, состоящие из коротко- и среднецепочечных мономеров с длиной цепи от 4 до 8 атомов углерода. Показано, что состав ПГА зависит от типа дополнительного субстрата. Жирные кислоты с нечётным количеством атомов углерода стимулируют бактерии синтезировать многокомпонентные ПГА, состоящие из таких основных компонентов, как 3-гидроксибутират, 3-гидроксивалерат и 3-гидроксигексаноат, и второстепенных, эпизодических компонентов: 3-гидроксигептаноата и 3-гидроксиоктаноата. Жирные кислоты с чётным количеством атомов углерода стимулируют синтез как соответствующих им мономеров (3-гидроксигексаноата и 3-гидроксиоктаноата), так и 3-гидроксивалерата, что позволяет получать четырёхкомпонентные ПГА, содержащие 3-гидроксибутират и 3-гидроксигексаноат в качестве основных компонентов. Было синтезировано семейство коротко- и среднецепочечных четырёх- и пятикомпонентных ПГА и проведено исследование их физико-химических и медико-биологических свойств.

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Доп.точки доступа:
Volova, T. G.; Волова, Татьяна Григорьевна; Shishatskaya, E. I.; Шишацкая, Екатерина Игоревна; Zhila, N. O.; Жила, Наталья Олеговна; Киселев, Евгений Геннадьевич; Kiselev, E. G.; Mironov, P. V.; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Peterson, I. V.; Петерсон, Иван Викторович; Sinskey, A. J.

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10.

Hierarchy of low-energy models of the electronic structure of cuprate HTSCs: The role of long-range spin-correlated hops / V. V. Val'kov [et al.] // Low Temp. Phys. - 2018. - Vol. 44, Is. 2. - P. 130-138, DOI 10.1063/1.5020908. - Cited References: 42. - This study was conducted with financial support from the Russian fund for fundamental science, Government of the Krasnoyarsk region, Krasnoyarsk regional fund for scientific and technical activity in the framework of Project No. 16-42-240435 as well as the complex program SO RAN No. P.2.P (Project No. 0356-2015-0405). The work of A. F. Barabanov is supported by RFFI (Grant No. 16-02-00304). . - ISSN 1063-777X. - ISSN 1090-6517

РУБ Physics, Applied
Рубрики:
HIGH-TC SUPERCONDUCTORS
SINGLE-BAND MODELS
OXIDE SUPERCONDUCTORS
Аннотация: It is shown that for the three-band Emery p–d-model that reflects the real structure of the CuO2-plane of high-temperature superconductors in the regime of strong electron correlations, it is possible to carry out a sequence of reductions to the effective models reproducing low-energy features of elementary excitation spectrum and revealing the spin-polaron nature of the Fermi quasiparticles. The first reduction leads to the spin-fermion model in which the subsystem of spin moments, coupled by the exchange interaction and localized on copper ions, strongly interacts with oxygen holes. The second reduction deals with the transformation from the spin-fermion model to the φ–d-exchange model. An important feature of this transformation is the large energy of the φ–d-exchange coupling, which leads to the formation of spin polarons. The use of this fact allows us to carry out the third reduction, resulting in the t̃ −J̃∗−I-model. Its distinctive feature is the importance of spin-correlated hops as compared to the role of such processes in the commonly used t–J*-model derived from the Hubbard model. Based on the comparative analysis of the spectrum of Fermi excitations calculated for the obtained effective models of the CuO2-plane of high-temperature superconductors, the important role of the usually ignored long-range spin-correlated hops is determined.

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Публикация на русском языке Иерархия низкоэнергетических моделей электронного строения купратных ВТСП: роль дальних спин-коррелированных перескоков [Текст] : статья / В. В. Вальков [и др.] // Физ. низк. температур. - 2018. - Т. 44 № 2. - С. 173-184

Держатели документа:
Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660037, Russia.
Inst High Pressure Phys, Troitsk 142190, Russia.

Доп.точки доступа:
Val'kov, V. V.; Вальков, Валерий Владимирович; Mitskan, V. A.; Мицкан, Виталий Александрович; Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Barabanov, A. F.; Russian fund for fundamental science, Government of the Krasnoyarsk region, Krasnoyarsk regional fund for scientific and technical activity [16-42-240435]; complex program SO RAN [P.2.P, 0356-2015-0405]; RFFI [16-02-00304]
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