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Ground state and phase transitions in a system of arg-cysteamines self-assembled on a Au(111) crystal surface / A. F. Sadreev [et al.] // J. Chem. Phys. - 2004. - Vol. 120, Is. 2. - P. 954-960, DOI 10.1063/1.1631920. - Cited References: 38 . - ISSN 0021-9606

РУБ Physics, Atomic, Molecular & Chemical
Рубрики:
MOLECULAR-DYNAMICS SIMULATION
   HYDROGEN-BOND
   MONOLAYERS
   MODEL
   GOLD
   PEPTIDES
   ALKANETHIOLS
   ACTIVATION
   FILMS
   CYS
Кл.слова (ненормированные):
Gold -- Ground state -- Hydrogen bonds -- Molecules -- Phase transitions -- Self assembly -- Surfaces -- Temperature -- Arg-cysteamines -- Crystal surface -- Dipole moments -- Dipole-dipole interactions -- Molecular dynamics
Аннотация: The translational and orientation order of arg-cysteamine molecules chemiabsorbed on the Au(111) crystal surface is considered. Couplings between carbon, nitrogen, and hydrogen atoms of the n-alkanethiols are approximated by the Lennard-Jones potential. Moreover, hydrogen bonds between oxygen and nitrogen and dipole-dipole interactions of the dipole moments of different atomic groups are taken into account. It is found that molecules are arranged in a 2x2 lattice and have the total symmetry C(6)xZ(2). The critical temperature of the phase transition to the tilted state T-c1, which breaks the symmetry C-6, is estimated to be extremely high. The spontaneous breakdown of the remaining symmetry Z(2) leads to the twisted state of the molecules and has the critical temperature T-c2=340 K. (C) 2004 American Institute of Physics.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
ИФ СО РАН
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
Dept. of Phys. and Msrmt. Technology, Linkoping University, S-581 83 Linkoping, Sweden

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Sukhunin, Y. V.; Petoral, R. M.; Uvdal, K.
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Short-term culture of monocytes as an in vitro evaluation system for bionanomaterials designated for medical use / E. I. Shishatskaya [et al.] // Food Chem. Toxicol. - 2016. - Vol. 96. - P. 302-308, DOI 10.1016/j.fct.2016.08.025. - Cited References: 46 . - ISSN 0278-6915

РУБ Food Science & Technology + Toxicology
Рубрики:
MAGNETIC NANOPARTICLES
   CELLULAR REDUCTION
   PROTEIN CORONA
   CELLS
   MECHANOTRANSDUCTION
   NANOMATERIALS
   LOCALIZATION
   BIOMATERIALS
   CYTOSKELETON
   ACTIVATION
Кл.слова (ненормированные):
Biocompatible biopolymers -- Polyhydroxyalkanoates -- Nanomaterials -- Nanodiamonds -- Fullerenes -- Bio-nanomaterials -- Monocytes
Аннотация: We studied the feasibility of using a short-term culture of monocytes, isolated from peripheral donor blood, to assess the biological activity of different types of bionanomaterials (BNM): biodegradable polimeric particles, fiber and film substrates of micro- and nano-dimensions, fullerenes (F) and nanodiamonds (ND), which are either currently in use and/or potentially applicable in medicine. Additionally, the effect of creating a protein corona on ND and F particles was investigated. The cellular reduction of (4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) is a well-established tool for assessing the viability/metabolic activity of cells. The scanning electron microscopy assay can detect fine changes in cell morphology. In the present study BNM have been shown to affect; in a size, chemical composition and morphological characteristics-dependent manner, the ability of monocytes to reduce MTT as well as their morphology. Moreover, the specific effects of ND and F on MTT reduction and cell morphology were exhibited in a dose-dependent manner and sensitive to the formation of surface protein corona. Our results suggest that short-term culture of monocytes is a sensitive model system for assessing the biological effects of BMPs in vitro. © 2016 Elsevier Ltd

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Держатели документа:
Siberian Federal University, Svobodnuy Av. 79, Krasnoyarsk, Russian Federation
Laboratory of Anatomy, Histology, Embryology, School of Medicine, University of Crete, Heraklion, Greece
Institute of Physics, Russian Academy of Science, Siberian Division, Akademgorodok, 50, Build. 38, Krasnoyarsk, Russian Federation
Laboratory of Toxicology, Medical School, University of Crete, Heraklion, Greece

Доп.точки доступа:
Shishatskaya, E. I.; Шишацкая, Екатерина Игоревна; Nikitovic, D.; Shabanov, A. V.; Шабанов, Александр Васильевич; Tzanakakis, G. N.; Tsatsakis, A. M.; Menzianova, N. G.
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Electrophysical properties of composites based on polyethylene modified with multi-walled carbon nanotubes with high content of Fe-Co-catalyst / S. I. Moseenkov, V. L. Kuznetsov, A. V. Zavorin [et al.] // Russ. J. Appl. Chem. - 2020. - Vol. 93, Is. 4. - P. 586-594, DOI 10.1134/S107042722004014X. - Cited References: 30. - This work was financially supported by the Russian Science Foundation, project no. 17-73-20293. . - ISSN 1070-4272. - ISSN 1608-3296

РУБ Chemistry, Applied
Рубрики:
POLYMER COMPOSITES
   NANOPARTICLES
   ACTIVATION
   NANOCOMPOSITES
Кл.слова (ненормированные):
multi-walled carbon nanotubes -- ferromagnetic catalyst particles -- polymer composites -- mechanical mixing in the melt -- gigahertz range -- electromagnetic absorption
Аннотация: The effect of the residual catalyst for the synthesis of multi-walled carbon nanotubes (MWCNTs) on the electrophysical properties of MWCNT-polyethylene composites produced by melt mechanical mixing was studied. The residual catalyst content was varied by changing the MWCNTs synthesis time. The nanotubes used in the work were characterized using transmission and scanning electron microscopy, atomic emission analysis, X-ray phase analysis, and magnetic permeability measurements. The structure of the synthesized composites was studied using optical and scanning electron microscopy. The dependences of the specific magnetization on the applied magnetic field, bulk electrical conductivity on the volumetric content of the filler in the composite, and the frequency dependences of the reflection, transmission, and absorption of electromagnetic radiation in the range 0.01-18 GHz were obtained. It was established that the obtained composites are characterized by a uniform distribution of nanotubes in the polymer matrix, and the dependence of the bulk electrical conductivity on the content of MWCNTs in the composite has a percolation character. Variation in the synthesis time of nanotubes allows producing MWCNTs with a high content of ferromagnetic particles, which are an alloy close in stoichiometry to the composition of the active component of the catalyst. It was shown that the use of composites modified with MWCNTs with a high content of residual catalyst is more effective for absorbing electromagnetic radiation due to an increase in their magnetic losses.

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Публикация на русском языке Электрофизические свойства композитов на основе полиэтилена, модифицированного многослойными углеродными нанотрубками с высоким содержанием Fe-Co-катализатора [Текст] / С. И. Мосеенков, В. Л. Кузнецов, А. В. Заворин [и др.] // Журн. прикл. химии. - 2020. - Т. 93 № 4. - С. 581-590

Держатели документа:
Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia.
Novosibirsk Natl Res State Univ, Novosibirsk 630090, Russia.
Natl Res Tomsk State Univ, Tomsk 634050, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Moseenkov, S. I.; Kuznetsov, V. L.; Zavorin, A. V.; Golubtsov, G. V.; Korovin, E. Yu.; Suslyaev, V. I.; Ishchenko, A. V.; Serkova, A. N.; Sergeenko, D. I.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Russian Science FoundationRussian Science Foundation (RSF) [17-73-20293]
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Synthesizing zinc sulfide films on the gold surface as the sensor for electrochemical quartz crystal microbalance / D. O. Krinitsyn, A. S. Romanchenko, S. A. Vorob'ev [et al.] // Russ. J. Electrochem. - 2021. - Vol. 57, Is. 12. - P. 1157-1163, DOI 10.1134/S1023193521120041. - Cited References: 23. - The study was supported by the Russian Scientific Foundation (grant no. 18-17-00135) . - ISSN 1023-1935. - ISSN 1608-3342

РУБ Electrochemistry
Рубрики:
CHEMICAL BATH DEPOSITION
   ZNS
   SPHALERITE
   ELECTRODES
   ACTIVATION
Кл.слова (ненормированные):
sphalerite -- thin films -- hydrochemical deposition -- electrochemistry -- quartz crystal microbalance -- dynamic light scattering -- gold -- spectroscopy
Аннотация: A zinc sulfate film is deposited from aqueous solutions of zinc sulfate onto the gold surface with the aim of preparation of a sensor for electrochemical quartz crystal microbalance (EQCM). The kinetics of this process, the particles formed in solution, and the film itself are studied by the methods of electrochemical quartz crystal microbalance, X-ray photoelectron spectroscopy, transmission electron microscopy, atomic force microscopy, optical and Raman spectroscopies, and dynamic light scattering. The effect of the procedure of gold surface preparation, the reagent concentration, and the temperature on the film adhesion, the length of induction period, the kinetics of film growth, and its structure and thickness are studied. It is shown that the film formation proceeds as a result of deposition of sufficiently coarse 200-700 nm colloid particles of sphalerite. It is demonstrated that this sensor can be used in studying the electrochemical reactions of ZnS and the interface phenomena by the methods of EQCM and cyclic voltammetry.

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Публикация на русском языке Получение пленок сульфида цинка на поверхности золота как сенсора электрохимического кварцевого микробаланса / Д. О. Криницын, А. С. Романченко, С. А. Воробьев [и др.] // Электрохим. - 2021. - Т. 57 № 12. - С. 762-768

Держатели документа:
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk, Russia.

Доп.точки доступа:
Krinitsyn, D. O.; Romanchenko, A. S.; Vorob'ev, S. A.; Likhatskii, M. N.; Karacharov, A. A.; Krylov, A. S.; Крылов, Александр Сергеевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Mikhlin, Yu L.; Russian Scientific FoundationRussian Science Foundation (RSF) [18-17-00135]
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