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Article
Synthesis, clarifying properties and refining structures of single-crystal magnesium borohydride di- and triammine complexes
The magnesium borohydride complexes with ammonia, Mg(BH4)2•2NH3 (MA-2) and Mg(BH4)2•3NH3 (MA-3), were obtained in a single crystal form and their structures were determined by the X-ray diffraction analysis. Acco...
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Article
Mineral and Geochemical Features of Zeolite-Siliceous Deposits at the Pauzhetka Geothermal Field, Southern Kamchatka
The Pauzhetka geothermal field was surveyed to study the mineral deposits that were formed as thermal water was discharged from well separators. We studied the compositions, structure, and geochemical properti...
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Article
Influence of Nonlinearity on an Exceptional Point in a System of Coupled Duffing Oscillators
The effect of nonlinearity on the displacement of an exceptional point in a system of two coupled Duffing oscillators with a change in the coupling coefficients and insertion loss was researched. It is shown t...
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Article
Saturation Vapor Pressure of Water over Sodium Borohydride Dihydrate
The relative humidity and saturated water vapor pressure resulted from the reversible equilibrium dissociation of crystalline NaBH4·2H2O in the temperature range 0–36°C were determined. Based on the data obtained...
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Article
Self-sustained oscillations of lift and drag forces, heat fluxes, and flowfield parameters over supersonic bodies under asymmetrical energy deposition
This paper examines the effect of an asymmetrical energy source impact on the flow around supersonic aerodynamic bodies in a viscous heat-conducting gas (air) at Mach 2.5. The simulations are based on the Navi...
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Article
Quantum-Chemical Simulation of Molecular Hydrogen Abstraction from Magnesium Borohydride Triammoniate
Successive abstraction of H2 from the Mg(BH4)2⋅nNН3 (n = 2, 3, 4) and (Mg(BH4)2⋅3NН3)2 complexes has been modeled within the framework of the cluster approach with the use of the 6-31G* basis set and hybrid densi...
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Chapter and Conference Paper
Hybrid Model for Sentiment Analysis Based on Both Text and Audio Data
A model for positive/negative sentiment analysis of phone conversations audio data is considered. Over six thousand features are retrieved employing opensmile Python library, afterward the most significant featur...
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Article
Effect of the Ile222Thr Missense Mutation in SsoIF2γ on the Affinity of γ and β Subunits of aIF2
Translation initiation factors 2 from eukaryotes (eIF2) and archaea (аIF2) mediate the delivery of charged initiator tRNA (Met-tRNAiMet) to the small ribosomal subunit. The factor e/аIF2 is composed of three subu...
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Article
Open AccessThe Composition, Structure, and Origin of Carbonate Concretions Sampled in the South Kambalnyi Central Thermal Field, Kamchatka
Carbonate concretions are formed at the base of a sequence of hydrothermal clay in the South Kambalnyi Central Thermal Field situated in the southern part of the Kambalnyi volcanic mountain range, Kamchatka. T...
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Article
Protein-Sorption and the Hemostatic Properties of Composite Materials Based on Polyurethane Foam Filled with Silicon and Aluminum Oxides
An effective hemostatic composite material was obtained due to the combination of water-absorption, protein-sorption, and hemostatic properties of highly dispersed oxides of SiO2 and Al2O3 with the cellular struc...
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Article
Synthesis, Structure, and Properties of Titanium Diboride Nanoparticles
The products of reaction between TiCl4 and NaBH4 in NaCl/KCl or KBr ionic melts at 973 and 1023 K under an argon pressure of 5 MPa have been characterized by various physicochemical analysis techniques. The resul...
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Article
Density and Temperature Fluctuations behind a Shock Wave under the Influence of a Stratified Energy Source
For the conditions obtained in experiments on the interaction between a shock wave and the ionization-unstable plasma, the influence of a thermally stratified energy source on the front of a shock wave is nume...
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Article
Norbornene Addition Polymerization with Catalysts Based on Transition Metal Compounds: 2008–2018
This review summarizes the data on the addition polymerization of norbornene catalyzed by various transition metal complexes published over the period of 2008–2018. The interest in the addition polynorbornenes...
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Article
Synthesis of Sodium Borohydride Dihydrate and Specific Features of Its Thermolysis
Process of thermolysis of sodium borohydride dihydrate samples produced from solution and via a vapor was considered. A study of an acetonitrile solution made by the method of nuclear magnetic resonance demons...
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Article
Passage of a Plane Shock Wave through the Region of a Glow Gas Discharge
The interaction of a plane shock wave (M = 5) with an ionized plasma region formed before the arrival of a shock wave by a low-current glow gas discharge is considered experimentally and numerically. In the exper...
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Article
Thermoanalytical and NMR investigation of NaBH4 × 2H2O thermolysis process
The article describes the thermolysis process of sodium borohydride dihydrate in thermoanalytical experiments. The reaction was carried out without solid catalyst and with catalyst as cobalt boride Co2B. It has b...
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Article
Thermoanalytical and NMR investigation of NaBH4·2H2O thermolysis process
The article describes the thermolysis process of sodium borohydride dihydrate in thermoanalytical experiments. The reaction was carried out without solid catalyst and with catalyst as cobalt boride Co2B. It has b...
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Article
Dihydrogen Elimination from Hydrated Magnesium Borohydride: Quantum-Chemical Modeling
The successive elimination of H2 from Mg(BH4)2 · nH2O (n = 1, 4, 6), (Mg(BH4)2)2 · 8H2O, and (Mg(BH4)2)4 · 4H2O complexes has been modeled in the framework of the cluster approach with the use of the 6-31G* basis...
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Article
Structural investigation of endoglucanase 2 from the filamentous fungus Penicillium verruculosum
Enzyme additives capable of degrading non-starch polysaccharides of cereal cell walls, which are major ingredients used in animal feed, can improve the efficiency of livestock production. Non-starch polysaccha...
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Article
Effect of sodium borohydride dihydrate aggregation on the barrier to elimination of hydrogen molecule: Quantum-chemical modeling
The successive elimination of Н2 from NaBH4 ∙ 2Н2O, (NaBH4 ∙ 2Н2O)2, (NaBH4 ∙ 2Н2O)4, and (NaBH4 ∙ 2Н2O)4 · Н2O complexes has been modeled in the framework of the cluster approach with the use of the 6-31G* basis...
