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(La0.4Eu0.6)0.7Pb0.3MnO3 single crystal: magnetic and transport properties; electron magnetic resonance measurements / K. G. Patrin [et al.] // Workshop INTAS - Sib. Branch of the RAS Sci. Cooperation on the Res. Project “New Layered 3d-Materials for Spintronics” / chairman G. A. Petrakovskii. - 2007. - P. 15
Аннотация: INTAS (The International Association for the Promotion of Cooperation with Scientists from the New Independent States of the Former Soviet Union) — международная ассоциация по содействию сотрудничеству с учёными новых независимых государств бывшего Советского Союза. Некоммерческая организация, финансировалась главным образом из бюджета Европейского Союза. Являлась крупнейшим фондом, поддерживающим научное сотрудничество между учёными стран бывшего СССР и Европейского Союза с 1993 г. Программы INTAS охватывали широкий круг научно-исследовательских проблем. 22 сентября 2006 года было принято решение о прекращении осуществления программы на основании рекомендации Европейской Комиссии. С 1 апреля 2007 года прекратилось распределение новых грантов.

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Petrakovskii, G. A. \chairman\; Петраковский, Герман Антонович; Patrin, K. G.; Патрин, Константин Геннадьевич; Volkov, N. V.; Волков, Никита Валентинович; Petrakovskii, G. A.; Boni, P.; Clementyev, E.; Sablina, K. A.; Саблина, Клара Александровна; Eremin, E. V.; Еремин, Евгений Владимирович; Vasilev, V.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; "New Layered 3d-Materials for Spintronics", Workshop INTAS - Siberian Branch of the Russian Academy of Sciences Scientific Cooperation on the Research Project(2007 ; March 20-23 ; Krasnoyarsk)
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A simple method for the preparation of 3,5-dinitrimino-1,2,4-triazole and its salts / A. M. Astakhov [et al.] // Chem. Heterocycl. Compds. - 2017. - Vol. 53, Is. 6-7. - P. 722-727, DOI 10.1007/s10593-017-2116-7. - Cited References:33 . - ISSN 0009-3122. - ISSN 1573-8353

РУБ Chemistry, Organic
Рубрики:
ENERGETIC MATERIALS
DERIVATIVES
2-NITROGUANIDINE
Кл.слова (ненормированные):
3,5-dinitramino-1,2,4-triazole -- 3,5-dinitrimino-1,2,4-triazole -- 1,2,4-triazoles -- energetic compounds -- nitramines -- nitrimines -- nucleophilic substitution
Аннотация: The reaction of 2-methyl-1-nitrD 3/4 isothiourea with hydrazine in the presence of alkali metal bicarbonates (carbonates) resulted in the formation of 3,5-dinitrimino-1,2,4-triazole salts. The same salts were also formed by a reaction of 2-methyl-1-nitrD 3/4 isothiourea with alkali metal salts of 4-nitrD 3/4 semicarbazide. This represents the first synthesis and characterization of the high-energy 3,5-dinitrimino-1,2,4-triazole, which can be readily isolated by treatment of its disodium salt with HCl.

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Держатели документа:
Reshetnev Siberian State Univ Sci & Technol, 31 Krasnoyarsky Rabochy Ave, Krasnoyarsk 660037, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Akademgorodok 50,Bldg 38, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Ave, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Astakhov, A. M.; Antishin, D. V.; Revenko, V. A.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Buka, E. S.
}
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Antibacterial properties of films of cellulose composites with silver nanoparticles and antibiotics / T. G. Volova [et al.] // Polym Test. - 2018. - Vol. 65. - P. 54-68, DOI 10.1016/j.polymertesting.2017.10.023. - Cited References: 61. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project № 16-43-242024 . The study was supported by the State budget allocated to the fundamental research at the Russian Academy of Sciences (project No AAAA-A17-117013050028-8 ). . - ISSN 0142-9418
Кл.слова (ненормированные):
Bacterial cellulose -- Composites -- Silver nanoparticles -- Antibiotics -- Properties -- Antibacterial activity
Аннотация: The present study describes production of bacterial cellulose composites with silver nanoparticles and antibiotics and compares their properties. Bacterial cellulose (BC) composites synthesized in the culture of the strain of acetic acid bacterium Komagataeibacter xylinus VKPM B-12068 with silver nanoparticles, BC/AgNps, were produced hydrothermally, under different AgNO3 concentrations (0.0001, 0.001, and 0.01 M) in the reaction medium. The presence of silver in the BC/AgNp composites was confirmed by elemental analysis conducted using scanning electron microscopy with a system of X-ray spectral analysis. Analysis showed that the average atomic number of silver particles in composite samples depended on the concentration of AgNO3: as AgNO3 concentration in the reaction solution was increased, silver content in the composites increased from 0.044 to 0.37 mg/cm2. BC composites with amikacin and ceftriaxone were prepared by immersing dry BC films in solutions containing different concentrations of the antibiotics. The surface structure and properties and physicochemical and mechanical characteristics of composites were investigated using SEM, DSC, X-ray analysis, the system for measuring water contact angles, and electromechanical tensile testing machine. The disk-diffusion method and the shake-flask culture method used in this study showed that all experimental composites had pronounced antibacterial activity against E. coli, Ps. eruginosa, K. pneumoniae, and St. aureus, and the BC/antibiotic composites were more active than BC/AgNp ones; S. aureus was the most susceptible to the effect of BC composites. No potential cytotoxicity was detected in any of the BC/AgNp composites in the NIH 3T3 mouse fibroblast cell culture, in contrast to the BC/antibiotic composites. These results suggest that BC composites constructed in the present study hold promise as dressings for managing wounds, including contaminated ones.

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Держатели документа:
Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 43/50 Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Volova, T. G.; Shumilova, A. A.; Shidlovskiy, I. P.; Nikolaeva, E. D.; Sukovatiy, A. G.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Shishatskaya, E. I.
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Antiferromagnetism of the cation-ordered warwickite system Mn2-xMgxBO4 (x=0.5, 0.6 and 0.7) / N. V. Kazak, N. A. Belskaya, E. M. Moshkina [et al.] // J. Magn. Magn. Mater. - 2020. - Vol. 507. - Ст. 166820, DOI 10.1016/j.jmmm.2020.166820. - Cited References: 39. - The reported study was funded by the Russian Foundation for Basic Research (no. 20-02-00559), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project. 18-42243007. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SPIN-GLASS BEHAVIOR
   CRYSTAL-STRUCTURES
   SINGLE-CRYSTALS
   INSIGHTS
   MGFEBO4
Кл.слова (ненормированные):
Warwickites -- Antiferromagnet -- Cation ordering -- Jahn-Teller distortions
Аннотация: X-ray diffraction, heat capacity and magnetic measurements are performed on single crystals of Mn2-xMgxBO4 (x = 0.5, 0.6 and 0.7) with the warwickite structure. The monoclinic symmetry is found for all samples with the space group P21/n. The M1 site is occupied by trivalent Mn ions while the M2 site is occupied by a mixture of divalent Mg and Mn ions. Regular cation and charge distributions are observed, which is unusual for heterometallic warwickites. The local octahedral distortions of M1O6 show the monotonic dependence on the Mg content and are in accordance with the Jahn-Teller distortion. All samples are found to undergo long-range antiferromagnetic ordering with rather low transition temperatures of TN = 16, 14 and 13 K for x = 0.5, 0.6, and 0.7, respectively. The ordering of local octahedral distortions, caused by the strong electron-phonon interaction of the trivalent Mn ions, is proposed to stabilise the cationic ordering and, as a result, the long-range magnetic ordering in the material.

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Держатели документа:
FRC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
RAS, Zavoisky Phys Tech Inst, FRC Kazan Sci Ctr, Kazan, Russia.
Kazan Volga Reg Fed Univ, Kazan, Russia.

Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Belskaya, N. A.; Moshkina, E. M.; Мошкина, Евгения Михайловна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Sofronova, S. N.; Софронова, Светлана Николаевна; Eremina, R. M.; Eremin, E. V.; Еремин, Евгений Владимирович; Muftakhutdinov, A. R.; Cherosov, M. A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [20-02-00559]; Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science to the research project [18-42243007]
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    Arrangement of Rh3+ ions in fac-triamminetrichloridorhodium from powder data and in fac-triamminetrinitratorhodium crystals twinned by merohedry / A. D. Vasiliev [et al.] // Acta Crystallogr. C. - 2013. - Vol. 69, Pt. 12. - P. 1462–1466 ; Spec. is. Interplay of crystallogr., spectrosc. and theor. meth. for solving chem. prob., DOI 10.1107/S010827011303076X . - ISSN 0108-2701
   Перевод заглавия: Расположение ионов Rh3+ в гран-триамминтрихлоридродии из порошковых данных и в мероэдрически двойникованном кристалле гран-триамминтринитрародия
Кл.слова (ненормированные):
crystal structure -- powder diffraction -- merohedral twinning -- fac-triamminetrichloridorhodium -- low solubility -- fac-triamminetrinitratorhodium
Аннотация: The rhodium complexes [RhCl3(NH3)3], (I), and [Rh(NO3)3(NH3)3], (II), are built from octahedral RhX3(NH3)3 units; in (I) they are isolated units, while in (II) the units are stacked in columns with partially filled sites for the Rh atoms. The octahedra of monoclinic crystals of (I) are linked by N-H...Cl hydrogen bonds and the Rh3+ ions are located on the mirror planes. In the trigonal crystals of (II), the discontinuous `columns` along the threefold axis are linked by N-H...O hydrogen bonds. The structure of (I) has been solved using laboratory powder diffraction data, the structure of (II) has been solved by single-crystal methods using data from a merohedrally twinned sample. Both compounds possess low solubility in water.

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Держатели документа:
Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Nikolaev Inst Inorgan Chem SB RAS, Novosibirsk 630090, Russia

Доп.точки доступа:
Vasiliev, A. D.; Васильев, Александр Дмитриевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Baidina, I. A.; Belyaev, A. V.; Vorob`eva, S. N.

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Astakhov, A. M.
Crystal and molecular structure of 1-phenyl-2-nitroguanidine / A. M. Astakhov, A. D. Vasiliev, V. A. Revenko // J. Struct. Chem. - 2012. - Vol. 53, Is. 5. - P. 1013-1016, DOI 10.1134/S0022476612050265. - Cited References: 12 . - ISSN 0022-4766

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical

Кл.слова (ненормированные):
nitrimines -- nitroguanidine -- single crystal X-ray diffraction study -- molecular structure
Аннотация: The molecular structure of 1-phenyl-2-nitroguanidine is nonplanar, but contains two almost planar fragments: nitroguanyl and phenyl groups. Unlike previously studied nitroguanidines, in 1-phenyl-2-nitroguanidine, the nitro group is turned to the secondary amino group. However, the structural parameters of the nitroguanyl group are little different from those of nitroguanidine and its alkyl derivatives. In the benzene ring, the symmetry in the geometric parameters is not observed, which is explained by the intermolecular interaction with the neighboring molecule.

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Публикация на русском языке Астахов А. М. Кристаллическая и молекулярная структура 1-фенил-2-нитрогуанидина [Текст] / А. М. Астахов, А. Д. Васильев, В. А. Ревенко // Журн. структ. химии. - 2012. - Т. 53 № 5. - С. 1031-1034

Доп.точки доступа:
Vasiliev, A. D.; Васильев, Александр Дмитриевич; Revenko, V. A.; Ревенко В.А.
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    Astakhov, A. M.
    Crystal and molecular structure of a co-crystal of 5-nitrimino-1,4H-1,2,4-triazole with dimethyl sulfoxide / A. M. Astakhov, A. D. Vasiliev // Crystallogr. Rep. - 2022. - Vol. 67, Is. 7. - P. 1146-1151, DOI 10.1134/S1063774522070409. - Cited References: 16 . - ISSN 1063-7745. - ISSN 1562-689X
   Перевод заглавия: Кристаллическая и молекулярная структура ко-кристалла 5-нитримино-1,4H-1,2,4-триазола с диметил сульфоксидом
Аннотация: The structure of the labile co-crystal of 5-nitrimino-1,4Н-1,2,4-triazole with dimethyl sulfoxide was determined by X-ray diffraction. It was established that the molecule, previously known as 3(5)-nitra-mino-1,2,4-triazole, has a nitrimine structure. The geometric parameters of the molecules are similar to those of other nitrimino-1,2,4-triazoles. Intermolecular interactions in the co-crystal are considered. An explanation is provided for the lability of the co-crystal.

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Держатели документа:
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660049 Russia
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036 Russia
Siberian Federal University, Krasnoyarsk, 660041 Russia

Доп.точки доступа:
Vasiliev, A. D.; Васильев, Александр Дмитриевич
}
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    Astakhov, A. M.
    X-Ray structure of the complex of 5-nitrimino-1,4H-1,2,4-triazole and DMSO / A. M. Astakhov, A. D. Vasiliev // New Trends in Res. of Energetic Mater. : Proceedings. - 2013. - P. 466-473
   Перевод заглавия: Структура комплекса 5-нитримино-1,4Н-1,2,4-триазола и DMSO

Доп.точки доступа:
Vasiliev, A. D.; Васильев, Александр Дмитриевич; Seminar on New Trends in Research of Energetic Materials (16 ; 2013 ; Apr. ; 10-12 ; Pardubice, Czech Republic)
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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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10.

Biosynthesis and properties of P(3HB-co-3HV-co-3H4MV) produced by using the wild-type strain Cupriavidus eutrophus B-10646 / T. Volova [et al.] // J. Chem. Technol. Biotechnol. - 2019. - Vol. 94, Is. 1. - P. 195-203, DOI 10.1002/jctb.5763. - Cited References: 32. - This study was supported financially by Project ‘Agropreparations of the new generation: a strategy of construction and realization’ (Agreement No 074‐02‐2018‐328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, ‘On measures designed to attract leading scientists to the Russian institutions of higher learning’. . - ISSN 0268-2575
Кл.слова (ненормированные):
polyhydroxyalkanoates -- 3-hydroxy-4-methylvalerate -- synthesis -- physicochemical properties
Аннотация: BACKGROUND: Polyhydroxyalkanoates (PHA) containing 3-hydroxy-4-methylvalerate (3H4MV) have better processing properties than other PHA types and were not prone to ageing. The main challenge in the production of these polymers is to simultaneously achieve high cell biomass, high polymer content, and high molar fraction of 3H4MV. The aim of this study was to investigate the production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxy-4-methylvalerate) [P(3HB-co-3 HV-co-3H4MV)] by Cupriavidus eutrophus B-10646, synthesize polymers with different contents of 3H4MV and investigate their properties. RESULTS: It was shown that 4-methylvalerate (4MV, the precursor substrate) concentration in the culture medium must not be higher than 1 g L−1, and that 4MV must be carefully dosed, with at least 10–12 h intervals between supplementations. A series of polymers with molar fractions of 3H4MV between 2.7 and 11.3 mol% was synthesized. Degrees of crystallinity, molecular weight characteristics, and thermal properties of the polymers have been investigated as dependent on proportions of monomers. CONCLUSION: The content of 3H4MV depends on the concentration of 4MV and conditions of carbon nutrition. The molar fraction of 3H4MV had a strong effect on the crystalline to amorphous region ratio. PHA containing 3H4MV specimens synthesized in this study had a degree of crystallinity of below 50%, which remained unchanged for 2.5 years.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
L.V. Kirenskii Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
International and Inter University Centre of Nanoscience and Nanotechnology, Mahatam Gandhi University, Kottyam, India

Доп.точки доступа:
Volova, T.; Menshikova, O.; Zhila, N.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Kiselev, E.; Peterson, I.; Shishatskaya, E.; Thomas, S.
}
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