SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 50 of 25357 papers
This study examines the state of oxygen chemisorbed on platinum electrodes in acidic and alkaline solutions, addressing whether multiple energetically distinct oxygen forms exist during cathodic reduction. Using pulse techniques, rapid current-potential curves and potentiostatic current-time transie…
This paper examines the electrical properties of limited solid solutions of CdTe in InSb, a semiconductor system with solubility restricted to about 5.5 percent CdTe. Polycrystalline samples containing 1 to 5 percent CdTe were prepared from purified components, and conductivity, Hall coefficient, th…
This study examines the kinetics of homogeneous and emulsion polymerization of alpha,beta-fluorine-substituted styrenes in comparison with styrene. Polymerization rates, activation energies, pre-exponential factors, and qualitative molecular-weight indicators were measured for solution reactions ini…
This paper addresses anomalously large and temperature-dependent apparent pre-exponential factors and activation energies observed in the slow condensed-phase decomposition of explosive substances. It proposes a thermal-chain mechanism in which heat released by a reacted molecule transiently raises …
This paper examines whether the dependence of effective viscosity on deformation rate in condensed linear polymers can be expressed by a universal reduced relationship. Using reduced viscosity and reduced deformation rate, the authors compare 51 flow curves for various polymer melts and concentrated…
This paper studies the linearized unsteady three dimensional flow of a compressible fluid around a thin finite span wing moving supersonically while encountering a weak plane shock wave inclined to the plane of motion. The velocity potential is decomposed into the potential of the moving shock and a…
This paper investigates whether xenon fluorides can be synthesized by radiation chemical activation of xenon and fluorine mixtures, motivated by evidence that fluorine atoms or excited species participate in xenon fluorination. Mixtures of spectroscopically pure xenon and fluorine were irradiated in…
The study examines hydrogen isotope exchange in hexasubstituted benzene derivatives under acidic deuterating conditions, comparing hexamethylbenzene and hexaethylbenzene with fused cycloalkane analogues. Experiments with deuterosulfuric acid in nitrobenzene, supported by proton resonance spectra and…
The study examines catalytic hydrogenation of furan amines in mildly acidic aqueous solution over Raney nickel, focusing on the formation of α-pyrrolidylalkanol-3 derivatives and related octahydroindole alcohols. The authors propose that hydrolytic cleavage of the furan ring gives aminodicarbonyl in…
This study reexamines the reaction of delta-3-carene oxide with acetic anhydride to clarify the structures of the resulting unsaturated alcohol acetates and oxide isomerization products. Fractionation, derivative formation, and infrared and ultraviolet spectroscopy show that the reaction yields l-ca…
The paper studies branching of almost-periodic solutions of nonlinear ordinary differential equations near a known almost-periodic solution when the associated variational system is degenerate. It reformulates the problem as a fixed point equation for a nonlinear integral operator in a Banach space …
This study examines hydrazinolysis of pyrimidine nucleosides and DNA under milder aqueous conditions intended to preserve the nucleic acid polymer. The authors tested uridine, cytidine, thymidine, adenosine, and guanosine as functions of hydrazine concentration, pH, and temperature, and identified p…
This paper applies the thermodynamics of irreversible processes to capillary osmosis and diffusiophoresis in solutions with molecular adsorption layers, treating these effects as reciprocal phenomena associated with pressure and chemical-potential differences across porous diaphragms. Using entropy …
The study examines how hydrostatic pressure changes the temperature, composition, and pressure phase relations of bismuth-tin alloys, chosen as a low-melting model eutectic system with opposite pressure dependences of the component melting points. Differential thermal analysis under pressures up to …
The paper studies asymptotic methods for Fourier transforms and related integrals whose kernels decrease too slowly for standard moment or convergence assumptions. Extending a regularization method of Tikhonov and Samarskii, it derives the small-argument asymptotic expansion of the Fourier transform…
This paper reports the preparation and characterization of several acyl-stabilized triphenylarsine ylides obtained from corresponding arsonium salts. The authors compare these compounds with analogous phosphorus ylides, describe effective deprotonation methods using sodium amide in liquid ammonia or…
This study examines how strong electrolytes affect the hydration rate of calcium oxide in concentration ranges excluding compound formation with lime. Hydration was followed by heat evolution in an adiabatic calorimeter for calcium oxide samples of different dispersion, and dissolution rates were me…
The paper develops a procedure for defining and calculating effective diffusion coefficients in a laminar multicomponent gas boundary layer, starting from the Stefan-Maxwell relations and recasting normal diffusion fluxes in a Fick-type form. For mixtures relevant to dissociated air, it derives wall…
This paper estimates the settling rate of nonlinear pulse automatic systems using the concept of degree of stability, extending frequency based absolute stability criteria beyond mere convergence. For a system consisting of a nonlinear element and a linear pulse part, the argument derives sufficient…
The paper examines anomalous additional maxima observed near threshold in optical excitation functions of selected helium spectral lines when certain impurities are added. Using pulsed electron acceleration and photon counting, the authors show that the additional maximum does not form during very s…
This paper proposes a mechanistic framework for oxidation of organic compounds on solid nonmetallic catalysts, treating the reaction as a sequence of electron transfer from the organic molecule to the catalyst, transfer to oxygen, oxygen ion formation, and surface reaction to products. It argues tha…
This paper investigates the interaction of aqueous potassium metaniobate with salts of selected transition and related metals, motivated by questions relevant to alkaline processing of niobium-containing ores. Using nephelometry, conductivity, pH measurements, optical spectroscopy, electrophoresis, …
This study examines the chromatographic behavior of type X zeolites in which sodium is replaced by varying amounts of calcium, using mixtures of C1 to C4 hydrocarbon gases with carbon monoxide and hydrogen. Experiments with three calcium zeolite samples show that increasing calcium content broadens …
This study examines the properties and structure of dicyclopentadienylmercury, previously interpreted as a compound with localized mercury carbon sigma bonds and diene cyclopentadienyl rings. Chemical reactions with mercuric halides, thallium hydroxide, cyanide, and n-butyl mercaptan, together with …
This study examines the kinetics of ethylene telomerization with carbon tetrachloride and chloroform, focusing on how temperature and radical chain length affect partial chain-transfer constants. Experiments in pressurized autoclaves, combined with gas-liquid chromatographic analysis and Mayo equati…
The paper reports experimental determinations of heats of combustion and derived standard heats of formation for four liquid spirocycloalkane hydrocarbons: spiro-(4,4)-nonane, spiro-(4,5)-decane, spiro-(5,5)-undecane, and spiro-(5,6)-dodecane. Using bomb calorimetry with benzoic acid calibration and…
This study examines phase transformations during catalytic crystallization of cordierite-composition glass in the SiO2, Al2O3, MgO system containing 10 mol.% TiO2. Glass samples were crystallized between 800 and 1200°C and analyzed by X-ray phase analysis and differential thermal analysis to determi…
The paper derives an analog of the Duhamel integral for linear electrical filters with time-varying parameters when the system has nonzero initial excitation. By subtracting the polynomial determined by the initial conditions, the author reduces the original differential equation to an initially une…
This study examines the direct reduction of high-molecular-weight aliphatic ketones to saturated hydrocarbons over aluminosilicate catalysts without an external hydrogen supply. Using stearone as a model substrate, the authors heated it with acid-activated clay at 250°C and separated the catalytic p…
This study examines trapping levels and their role in the photoconductivity of organic photoconductors, using thin films of the triphenylmethane dye brilliant green as a model system. Photoconductivity measurements, thermally stimulated conductivity, and electron paramagnetic resonance spectra were …
This paper examines deposition of coarse dispersed aerosols in vegetation, arguing that wind driven inertial capture by plant surfaces can exceed gravitational settling. Field observations using horizontal and vertical glass collectors are combined with a diffusion model in which vegetation is repre…
This paper investigates luminescence observed during the acylation of aniline by benzoyl chloride in ether and evaluates its use for kinetic measurements. Photometric experiments show that the glow does not arise directly from the chemical reaction, but from crystallization of the poorly soluble pro…
This study examines the sintering behavior of high purity active magnesium oxide prepared by calcining spectrally pure magnesium hydroxide or carbonate, with attention to precursor choice, calcination temperature, firing temperature, and sintering kinetics. Experiments on pressed specimens showed th…
This study examines phase equilibria and selected physical properties in binary systems formed by antimony chalcogenides, focusing on Sb2S3, Sb2Se3 and Sb2Te3. Alloys were prepared from high purity elements in sealed evacuated ampoules, annealed to equilibrium, and investigated by differential therm…
This note develops a class of singular integro-differential elliptic systems on a bounded smooth domain and extends the general theory of elliptic boundary-value problems with singular integro-differential boundary conditions. It defines ellipticity, proper ellipticity, admissible symbols, and the L…
This paper proposes an approximate hydrodynamic model for the high velocity normal impact of a small projectile on a semi-infinite metallic target, in the regime where both materials behind shock waves behave approximately as liquids. The interaction is represented by a mushroom-like projectile form…
The paper studies topological properties of solution sets for linear multidimensional differential equations of the form dy/dx = Ay in finite-dimensional real spaces, under the commutativity condition that ensures solvability of the Cauchy problem. It interprets the orbits of solutions as multidimen…
This note strengthens a previously established category result for spaces metrized over a semifield by studying the notion of phi-completeness for spaces metrized over R_Delta. After recalling the definitions of semifield-valued metric spaces, phi-fundamental sequences, phi-limits, and phi-completen…
The paper studies local saturation for families of linear positive operators through normalized remainder operators built from their algebraic moments. Under boundedness, asymptotic, and symmetry-type integral conditions, it proves that a uniformly vanishing normalized remainder forces the approxima…
This study investigates the primary stages of radiolysis in several polyamides and low molecular weight analogues using gas analysis, mass spectrometry, infrared spectroscopy, and electron paramagnetic resonance. Irradiation produces hydrogen and carbon monoxide, with hydrogen accumulation remaining…
This note studies stable automorphisms of arbitrary groups in relation to the quasinilpotent radical. Using normal series stable under automorphisms and properties of subinvariant subgroups, it proves that the quasinilpotent radical of a group coincides with the set of its stable elements, and exten…
The paper formulates a class of inverse problems in which unknown parameters of a linear operator are reconstructed from measured linear functionals, interpreted as instrument readings. Using adjoint equations, it derives perturbation formulas that relate discrepancies between measured and computed …
Photoionization of aniline, N-methylaniline, N,N-dimethylaniline, and benzylamine was studied by photo-mass spectrometry in the vacuum ultraviolet region up to about 14 eV, with deuterated amino-group samples used to clarify fragment-ion formation. Ionization-efficiency curves were used to identify …
This paper examines thermodynamic regularities in ternary aqueous salt solutions, focusing on the relation between isopiestic data and activity coefficients under isomolal conditions. Starting from previously proposed equations for 1:1 electrolytes, it derives transformations that lead, under stated…
The study examines the liquid phase oxidation of diisopropylmercury by oxygen in n-nonane, with attention to kinetic regularities and the role of reaction products in chain development. Oxidation was monitored by oxygen uptake at constant pressure and by product analysis, including tests with radica…
This paper studies characteristic exponents of solutions to abstract differential equations in a Banach space generated by closed, generally unbounded, sectorial operators. It extends Krein’s results for bounded operators by relating exponents of the linear equation to the real parts of the spectrum…
Maslov presents an inverse method for establishing derivability in the narrow classical predicate calculus, building on Herbrand’s theorem and earlier metavariable approaches. For closed prenex formulas with conjunctive matrices, the paper defines resolvents, chains, bundles, and favorable sets, the…
This paper studies differentiation and integration for constructive real numbers and constructive functions, including functions of one and two variables, under a constructive interpretation of logical assertions. It formulates definitions of uniform differentiability, local uniform continuity, rect…
This paper presents a method for calculating creep in beams under pure bending using a four-element elastic-viscous phenomenological model whose parameters depend on stress. To make the nonlinear problem tractable, the stress-dependent elastic and viscous characteristics are approximated as piecewis…
