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Raman scattering study of the upper phase transition in CsScF4 / A. N. Vtyurin [et al.] // Journal of Raman Spectroscopy. - 2000. - Vol. 31, Is. 3. - P. 151-155, DOI 10.1002/(SICI)1097-4555(200003)31:3151::AID-JRS5103.0.CO;2-T . - ISSN 0377-0486
Кл.слова (ненормированные):
article -- crystal -- heating -- high temperature -- melting point -- neutron scattering -- phase transition -- photon -- Raman spectrometry -- temperature dependence
Аннотация: Effects of the phase transition between the high-temperature tetragonal phases of the CsScF4 crystal were studied by Raman scattering. The appearance of new lines including a soft mode was observed below the phase transition point, in complete accordance with the new crystal symmetry. The behavior of the soft mode, which corresponds to in-phase rotations of ScF6 rigid groups around the z-axis (and out-of-phase within perovskite-like layers), resembles that observed earlier in RbAlF4, which suggests a similar mechanism of this transition in both crystals. Copyright (C) 2000 John Wiley and Sons, Ltd.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Laboratoire Physique de l'Etat Condens, UPRES A CNRS No. 6087, Universit du Maine, 72085 Le Mans Cdex g, France

Доп.точки доступа:
Vtyurin, A. N.; Втюрин, Александр Николаевич; Bulou, A.; Krylov, A. S.; Крылов, Александр Сергеевич; Shmygol, I. V.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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    New class of bicyclic compounds derived from thiobarbituric acid with representative compound 1,3-diethyl-7-hydroxy-5,5,7-trimethyl-2-thioxo-1,2,3,5,6,7-hexahydro-4H-pyrano[2,3-d]pyrimidin-4-one. Preparation, crystal structure, mass spectrometry and IR spectroscopy / N. N. Golovnev [et al.] // J. Mol. Struct. - 2015. - Vol. 1102. - P. 101-107, DOI 10.1016/j.molstruc.2015.08.046. - Cited References: 40. - The work was carried out within the public task of the Ministry of Education and Science of the Russian Federation for research engineering of the Siberian Federal University in 2015 (Contract 3049). V.V.A. is grateful to the Ministry of Education and Science of the Russian Federation for the financial support of the investigation (Contract 14.607.21.0106). The authors also thank SFU CEJU for the technical support . - ISSN 0022-2860
   Перевод заглавия: Новый класс бициклических соединений полученных из тиобарбитуровой кислоты с представителем 1,3-диэтил-7-гидрокси-5,5,7-триметил-2-тиоксо-1,2,3,5,6,7-гексагидро-4H-пирано[2,3-d]пиримидин-4-он. Синтез, кристаллическая структура, масс спектроскопия и ИК спектроскопия
Рубрики:
1,3-diethyl-2-thiobarbituric acid
   Crystal-structure
   2-thiobarbituric acid
   Barbituric-acid
   Hydrogen-bond
   Derivatives
   Diffraction
   Equilibria
   Inhibitors
   Series
Кл.слова (ненормированные):
Bicyclic compounds -- Thiobarbiturates -- Heterocycles -- X-ray diffraction -- IR spectroscopy -- Theoretical calculations
Аннотация: The colorless crystals of 1,3-diethyl-7-hydroxy-5,5,7-trimethyl-2-thioxo-1,2,3,5,6,7-hexahydro-4H-pyrano[2,3-d]pyrimidin-4-one (1) have been crystallized from the solution containing 1,3-diethyl-2-thiobarbituric acid (HDETBA) and equal volumes of concentrated HCl and acetone A possible stoichiometric reaction mechanism has been suggested. The crystal structure of 1 has been determined by X-ray single crystal analysis. The phase purity of the precipitate has been verified by powder X-ray diffraction analysis. Compound 1 crystallizes in the orthorhombic structure, space group P212121, with cell parameters a = 9.7454(4), b = 11.2225(4), c = 13.9171(5) Å, Z = 4, V = 1522.1(1) Å3. The molecules of 1 contain the bicyclic ring constructions new in thiobarbiturates. The molecules of 1 are linked by O-H...O hydrogen bonds to infinite molecule chains. The results of mass spectrometric analysis, theoretical studies and IR spectroscopy confirm the structure of 1. Using the PASS software, the general pharmacological potential of 1 was analyzed.

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Держатели документа:
Siberian Federal University, Svobodny Aven. 79, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, SB RAS, Bld. 38, Akademgorodok 50, Krasnoyarsk, Russian Federation
Far Eastern State Transport University, 47 Serysheva Str., Khabarovsk, Russian Federation
Laboratory of Physical Chemistry, Irkutsk Favorsky Institute of Chemistry, SB RAS, 1 Favorsky, Irkutsk, Russian Federation
Laboratory of Optical Materials and Structures, SB RAS, Institute of Semiconductor Physics, 13 Lavrentiev Aven., Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, 36 Lenin Aven., Tomsk, Russian Federation
Laboratory of Semiconductor, Dielectric Materials, Novosibirsk State University, 2 Pirogov Str., Novosibirsk, Russian Federation
Institute of Thermophysics, 1 Lavrentiev Aven., Novosibirsk, Russian Federation

Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Sterkhova, I. V.; Goryunov, Y. V.; Atuchin, V. V.
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    Pressure-stimulated synthesis and luminescence properties of microcrystalline (Lu,Y)3Al5O12:Ce3+ garnet phosphors / V. V. Atuchin [et al.] // ACS Appl. Mater. Interfaces. - 2015. - Vol. 7, Is. 47. - P. 26235-26243, DOI 10.1021/acsami.5b08411. - Cited References: 75. - This work was partly supported by the National Natural Science Foundations of China (Grant Nos. 51272242 and 51511130035) and the Russian Foundation for Basic Research (Grant No. 15-52-53080 GFEN_a). V.V.A. was partly supported by the Ministry of Education and Science of the Russian Federation . - ISSN 1944-8244
   Перевод заглавия: Синтез стимулированный давлением и люминесцентные свойства микрокристаллических гранатов (Lu,Y)3Al5O12:Ce3+

РУБ Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
LASER MASS-SPECTROMETRY
   LIGHT-EMITTING-DIODES
   WHITE-LIGHT
   SINGLE-CRYSTALS
   OPTICAL-PROPERTIES
   ELECTRONIC-STRUCTURE
   VIBRATIONAL PROPERTIES
   PHASE-TRANSITIONS
   PARTICLE-SIZE
   GROWTH
Кл.слова (ненормированные):
synthesis -- pressure -- garnet -- structure -- luminescence -- phosphor
Аннотация: The Lu2.98Ce0.01Y0.01Al5O12 and Y2.99Ce0.01Al5O12 phosphors were synthesized by solid state reaction at temperature 1623 K and pressure 1.5 × 107 Pa in (95% N2 + 5% H2) atmosphere. Under the conditions, the compounds crystallize in the form of isolated euhedral partly faceted microcrystals ∼19 μm in size. The crystal structures of the Lu2.98Ce0.01Y0.01Al5O12 and Y2.99Ce0.01Al5O12 garnets have been obtained by Rietveld analysis. The photoluminescence (PL) and X-ray excited luminescence (XL) spectra obtained at room temperature indicate broad asymmetric bands with maxima near 519 and 540 nm for Y2.99Ce0.01Al5O12 and Lu2.98Ce0.01Y0.01Al5O12, respectively. The light source was fabricated using the powder Lu2.98Ce0.01Y0.01Al5O12 phosphor and commercial blue-emitting n-UV LED chips (λex = 450 nm). It is found that the CIE chromaticity coordinates are (x = 0.388, y = 0.563) with the warm white light emission correlated color temperature (CCT) of 6400 K and good luminous efficiency of 110 lm/W. © 2015 American Chemical Society.

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Держатели документа:
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, Russian Federation
Analytical Laboratory, Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russian Federation
Department of Applied Physics, Novosibirsk State University, Novosibirsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Laboratory of High Pressure Minerals and Diamond Deposits, Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China

Доп.точки доступа:
Atuchin, V. V.; Beisel, N. F.; Galashov, E. N.; Mandrik, E. M.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Yelisseyev, A. P.; Yusuf, A. A.; Xia, Z.
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Composite materials on high-T-c superconductors and BaPbO3, Ag basis / A. G. Mamalis [et al.] // Physica C. - 2001. - Vol. 364. - P. 174-177, DOI 10.1016/S0921-4534(01)00749-3. - Cited References: 9 . - ISSN 0921-4534

РУБ Physics, Applied

Кл.слова (ненормированные):
composite high-T-c superconductors -- superconducting fault current limiter -- Composite high-Tc superconductors -- Superconducting fault current limiter -- Composite materials -- Electric fault currents -- Interfaces (materials) -- Magnetic variables measurement -- Mathematical models -- Scanning electron microscopy -- Spectrometry -- Superconducting transition temperature -- Superconductivity -- X ray diffraction analysis -- Solid state reactions -- High temperature superconductors
Аннотация: The preparation., processing and characterization of the composite materials on high-T-c superconductor (HTSC) basis, YBa2Cu3O7/Ag and Y0.75Lu0.25Ba2Cu3O7/BaPbO3, is reported. The initial components YBa2Cu3O7 and BaPbO3 were prepared by the standard solid state reaction technique. The microstructures of the samples were observed by scanning electron microscopy. whilst the XRD paterns of the composites HTSC+Ag and HTSC+BaPbO3 revealed the 123 superconducting phase and the Ag or BaPbO3 structure. The chemical compositions of the powders and the interface zone were found by employing energy dispersive spectrometry. The resistive and magnetic measurements of the composites indicated the transition temperature 93.5 K. Application of such composite materials in the construction of a superconducting fault current limiter model is reported. (C) 2001 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Natl Tech Univ Athens, Dept Mech Engn, Mfg Technol Div, Athens 10682, Greece
Russian Acad Sci, Kiensky Inst Phys, Krasnoyarsk, Russia
ИФ СО РАН
Manufacturing Technology Division, Department of Mechanical Engineering, National Technical University of Athens, 42, 28th October Ave., 10682 Athens, Greece
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Mamalis, A. G.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaihutdinov, K. A.; Gohfeld, D. M.; Kharlamova, S. A.; Vottea, I. N.; International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials(3 ; 2001 ; Jan. 15-19 ; Honolulu, Hawaii)
}
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Molecular epitope determination of aptamer complexes of the multidomain protein C-met by proteolytic affinity-mass spectrometry / L. Lupu, P. Wiegand, N. Huttmann [et al.] // ChemMedChem. - 2020. - Vol. 15, Is. 4. - P. 363-369, DOI 10.1002/cmdc.201900489. - Cited References: 40. - We gratefully acknowledge the advice and assistance of Prof. Friedemann Volklein and Oliver Muller, MSc in the preparation of chips for the SPR affinity determinations. We thank Dr. Stefan Maeser, Biogen GmbH, Munchen, for valuable advice and critical reading of the manuscript. This work has been partially funded (Chip-MS epitope analysis) by the LOEWE-3 Funding Agency, Hessen-Agentur, Wiesbaden, Germany; Grant 696/19-16 . - ISSN 1860-7179. - ISSN 1860-7187

РУБ Chemistry, Medicinal + Pharmacology & Pharmacy
Рубрики:
DNA APTAMERS
ANTIBODIES
RECOGNITION
Кл.слова (ненормированные):
C-Met protein -- tumor biomarkers -- aptamer-C-Met complexes -- aptamer epitopes -- affinity-mass spectrometry -- epitope peptide analysis
Аннотация: C‐Met protein is a glycosylated receptor tyrosine kinase of the hepatocyte growth factor (HGF), composed of an α and a β chain. Upon ligand binding, C‐Met transmits intracellular signals by a unique multi‐substrate docking site. C‐Met can be aberrantly activated leading to tumorigenesis and other diseases, and has been recognized as a biomarker in cancer diagnosis. C‐Met aptamers have been recently considered a useful tool for detection of cancer biomarkers. Herein we report a molecular interaction study of human C‐Met expressed in kidney cells with two DNA aptamers of 60 and 64 bases (CLN0003 and CLN0004), obtained using the SELEX (Systematic Evolution of Ligands by Exponential Enrichment) procedure. Epitope peptides of aptamer‐C‐Met complexes were identified by proteolytic affinity‐mass spectrometry in combination with SPR biosensor analysis (PROTEX‐SPR‐MS), using high‐pressure proteolysis for efficient digestion. High affinities (KD, 80–510 nM) were determined for aptamer‐C‐Met complexes, with two‐step binding suggested by kinetic analysis. A linear epitope, C‐Met (381–393) was identified for CLN0004, while the CLN0003 aptamer revealed an assembled epitope comprised of two peptide sequences, C‐Met (524–543) and C‐Met (557–568). Structure modeling of C‐Met‐aptamers were consistent with the identified epitopes. Specificities and affinities were ascertained by SPR analysis of the synthetic epitope peptides. The high affinities of aptamers to C‐Met, and the specific epitopes revealed render them of high interest for cellular diagnostic studies.

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Держатели документа:
Steinbeis Ctr Biopolymer Anal & Biomed Mass Spect, Marktstr 29, D-65428 Russelsheim, Germany.
Univ Ottawa, Dept Chem & Biomol Sci, Ottawa, ON K1N 6N5, Canada.
Rhein Main Univ, Dept Engn Sci, D-65428 Russelsheim, Germany.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 66041, Russia.
Russian Acad Sci, Fed Res Ctr, Lab Digital Controlled Drugs & Theranost, Siberian Branch,Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Pressure Biosci Inc, 14 Norfolk Ave, South Easton, MA 02375 USA.

Доп.точки доступа:
Lupu, Loredana; Wiegand, Pascal; Huttmann, N.; Rawer, Stephan; Kleinekofort, Wolfgang; Shugureva, Irina; Kichkailo, Anna S.; Tomilin, F. N.; Томилин, Феликс Николаевич; Lazarev, Alexander; Berezovski, Maxim V.; Przybylski, Michael; LOEWE-3 Funding Agency, Hessen-Agentur, Wiesbaden, Germany [696/19-16]
}
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    Magnetic, optical, and thermic properties of SrLnCuSe3 (Ln = Dy, Ho, Er, Tm) compounds / N. N. Habibullayev, N. G. Naumov, A. N. Lavrov [et al.] // Magnetochemistry. - 2023. - Vol. 9, Is. 8. - Ст. 194, DOI 10.3390/magnetochemistry9080194. - Cited References: 36. - The study was funded by the Russian Science Foundation, project No. 23-23-00488 . - ISSN 2312-7481
   Перевод заглавия: Магнитные, оптические и термические свойства соединений SrLnCuSe3 (Ln = Dy, Ho, Er, Tm)
Кл.слова (ненормированные):
single-crystal X-ray diffraction -- Curie–Weiss dependence -- magnetic susceptibility -- effective magnetic momentum -- bandgap -- DFT calculations -- Raman spectrometry -- thermal analysis -- scanning electron microscope
Аннотация: SrLnCuSe3 (Ln = Dy, Ho, Er, Tm) compounds crystallize in the Pnma and Cmcm orthorhombic space group and belong to the Eu2CuS3 and KCuZrS3 structural type, respectively. According to a single-crystal XRD study, the SrTmCuSe3 unit cell parameters are a = 4.0631 (4), b = 13.4544 (14), c = 10.4430 (10) A, and V = 570.88 (10) A3. All the studied SrLnCuSe3 samples in the temperature range of 1.77–300 K demonstrate paramagnetic behavior without any features pointing to magnetic ordering. The measured Curie constants coincide with the values expected for Ln3+ ions with good accuracy, which confirms the stoichiometric composition of the samples and the non-magnetic state of the copper ions, Cu1+ (S = 0). The conducted optical absorption study showed that the polycrystalline SrLnCuSe3 (Ln = Dy, Ho, Er, Tm) samples are semiconductors with a direct bandgap ranging from 2.14 eV to 2.31 eV. Two indirect bandgaps were revealed and explained by the presence of optical transitions to highly dispersive subbands in the conduction band. The compounds demonstrate two reversible phase transitions α⇆β, β⇆γ and an incongruent melting at 1606 K (Dy), 1584 K (Ho), 1634 K (Er), and 1620 K (Tm) associated with the formation of solid solutions of SrSe, Cu2-XSe, and Ln2Se3 binary compounds.

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Держатели документа:
Institute of Chemistry, University of Tyumen, 625003 Tyumen, Russia
Nikolaev Institute of Inorganic Chemistry SB RAS, 630090 Novosibirsk, Russia
Kirensky Institute of Physics, Federal Research Center, KSC, SB RAS, 660036 Krasnoyarsk, Russia
Department of Photonics and Laser Technology, Siberian Federal University, 660036 Krasnoyarsk, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center, KSC, SB RAS, 660036 Krasnoyarsk, Russia
Laboratory of Theory and Optimization of Chemical and Technological Processes, University of Tyumen, 625003 Tyumen, Russia
Department of Physics, Far Eastern State Transport University, 680021 Khabarovsk, Russia
Department of Physical and Applied Chemistry, Kurgan State University, 640020 Kurgan, Russia
Department of General and Special Chemistry, Industrial University of Tyumen, 625000 Tyumen, Russia
Institute of Solid State Chemistry, UB RAS, 620990 Ekaterinburg, Russia

Доп.точки доступа:
Habibullayev, N. N.; Naumov, N. G.; Lavrov, A.N.; Kuratieva, N. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Palamarchuk, I. V.; Yurev, I. O.; Denisenko, Y. G.; Andreev, O. V.; Zakharova, A. D.
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