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 paper analyzes the small-signal electrochemical behavior of a semiconductor electrode in oxidation-reduction reactions, emphasizing the role of the injection coefficient, defined as the fraction of minority-carrier current in the total current. Using diffusion equations for electrolyte species,…
The paper reexamines the conduction-band structure of gallium phosphide, motivated by discrepancies between the accepted model with a direct transition near 2.55 eV and compositional evidence suggesting higher direct-transition energies. Using transmission and reflection measurements on plane-parall…
This paper studies the Cauchy problem for a higher order differential operator that factors into powers of wave operators with distinct propagation speeds. The authors derive formulas expressing the solution in terms of spherical means of the initial data, first for the strictly hyperbolic case and …
This study reports additional nuclear quadrupole resonance measurements of As-75 nuclei in natural orpiment, As2S3, using a pulsed quadrupole echo method at 77 and 300 K on cleavage fragments, polycrystals, and powders from two deposits. The spectra consistently contain two equal-intensity lines, in…
This study examines the reaction of thiourea with organic sulfides, disulfides, and sulfenyl chlorides in acidic media, extending earlier work on analogous reactions of ethers. Experiments with tert-butyl, n-butyl, isobutyl, and phenyl sulfur compounds show that sulfides may give either S-alkylisoth…
Small-angle X-ray scattering was used to examine temperature-dependent changes in the long period of highly oriented low-pressure polyethylene fibers during repeated heating and cooling between room temperature and about 116 degrees C. The first heating cycle produced irreversible structural changes…
This study investigates longitudinal elastic wave velocities in igneous and metamorphic rock samples under pressures up to 20,000 kg/cm², extending earlier laboratory measurements relevant to seismic interpretation of the Earth’s crust and upper mantle. The authors used a high-pressure apparatus wit…
The study examines the temperature dependence of electrical double layer capacitance at the interface between liquid carbon saturated iron and molten calcium aluminosilicate or aluminate electrolytes at 1300 to 1600 degrees Celsius. Using alternating current polarization and frequency extrapolation …
The paper constructs a Green tensor representation for stresses in an anisotropic elastic medium containing sources of internal stress, such as dislocations, point defects, or temperature gradients. Starting from Kröner’s formulation in terms of the incompatibility tensor, it develops an explicit pr…
The paper studies the high energy asymptotic behavior of the trace of the spectral function for a self-adjoint second order elliptic differential operator in Euclidean space with uniformly elliptic coefficients and nonnegative potential. Since known pointwise asymptotics for the spectral function ar…
This note studies the scalar product of Hecke Z-functions attached to Größencharaktere of two distinct imaginary quadratic fields, expressed as a Dirichlet series over pairs of integral divisors with equal norms. It proves regular continuation of this function into a half-plane slightly to the left …
The paper describes an explosive-driven device for producing high-velocity gas jets and strong shock waves by accelerating a metal plate against a gas-filled compression chamber with an outlet diaphragm. Experiments using photochronographic measurements show that gas acceleration occurs mainly in th…
This paper investigates how the critical alternating current of superconducting solenoids changes with temperature when cooled through the helium lambda point. Solenoids wound from a niobium titanium based superconducting alloy were tested at 50 Hz in liquid helium, using brass and fluoroplastic for…
This paper develops a theoretical model for steady currents and density distribution in a stratified sea strait of rectangular cross-section, driven by wind stress, longitudinal sea-level differences, and density gradients. Starting from simplified momentum and diffusion equations with constant turb…
The paper studies nonhomogeneous linear equations of infinite order with constant coefficients in generalized derivatives, seeking analytic or entire solutions under conditions on the coefficient sequence defining the derivative and on the characteristic function. It reformulates the equation as an …
This study reports a chemical investigation of the flowers of goat’s rue, Galega officinalis L., a plant previously examined mainly for constituents of its seeds and herb. Ethanol extraction yielded a crystalline flavonoid glycoside named galein, which on acid hydrolysis produced the aglycone galeti…
This paper examines the mechanism by which hydrocarbons containing a six-membered ring form during catalytic hydrocondensation of carbon monoxide with cyclopentene over a cobalt catalyst in the presence of hydrogen. To test an earlier hypothesis that methylenecyclopentane is an intermediate that sub…
This paper proposes a method for determining the transfer coefficient of fast electrochemical oxidation, reduction reactions at low alternating-current frequencies. The authors analyze the phase shift of the second harmonic of the alternating electrode potential relative to a sinusoidal polarizing c…
This note studies angular limit values at a prescribed point of a simple rectifiable plane arc for Cauchy type integrals whose densities satisfy local estimates relative to a bounded nonnegative lower semicontinuous function. It introduces geometric measure quantities describing how the curve and th…
This study examines the mechanism of gamma radiolysis in dilute aqueous sodium nitrate solutions, with attention to the roles of hydrated electrons, hydrogen atoms, hydroxyl radicals, oxygen, and pH. Product yields of nitrite, hydrogen peroxide, and hydrogen were measured in deaerated, air-saturated…
The paper studies rotational motions with one degree of freedom and slowly varying parameters when the small perturbation depends periodically on time. Using a resonant change of variables and averaging methods, it derives equations for stationary resonant regimes characterized by integer frequency …
This paper investigates the formation and behavior of triplet benzene molecules in liquid benzene, a system in which direct phosphorescence and triplet absorption are not readily observed. The study uses photosensitized trans to cis isomerization of stilbene in air-free benzene solutions as an indir…
This study examines how molybdenum, vanadium, and niobium affect the elastic properties and phase behavior of multicomponent titanium alloys in Ti-Mo-V, Ti-Mo-Nb, Ti-V-Nb, and Ti-Mo-V-Nb systems. Alloys with fixed ratios of alloying elements were arc-melted, annealed or quenched, and compared throug…
This study examines how para substituents affect electron-density distribution in anion radicals of substituted para-nitrobiphenyls and how insertion of a second benzene ring modifies transmission of substituent effects. Polarographic half-wave potentials and electron paramagnetic resonance spectra …
This paper proposes a thermodynamic interpretation of the band gap in semiconductor compounds, treating the activation of intrinsic current carriers as a dissociation process followed by formation of ions, electrons, and holes. Using Gibbs dissociation potentials for solid compounds in equilibrium w…
This note studies the general completeness problem for finite automata bases in logical networks, allowing arbitrary finite automata as elements, finite input and output alphabets, and both initial and noninitial bases. It formulates recognition problems for realizability of a given operator, comple…
The paper studies the long-time behavior of solutions to first boundary-value problems with zero boundary data for certain degenerate quasilinear parabolic equations, including one-dimensional nonstationary filtration type equations and a multidimensional analogue. Assuming existence of regularized …
This study examines low-temperature liquid-phase oxidation of small concentrations of carbon monoxide using aqueous palladium salt catalysts in a flow system at 20 and 40°C. The authors test the effects of added oxidants, including copper, iron, hydrogen peroxide, and chromium compounds, as well as …
The paper studies a class of non-self-adjoint boundary-value problems in which the spectral parameter appears both in the differential equation and in the boundary condition, although the corresponding fixed-parameter operators and boundary conditions are self-adjoint. Using an abstract Hilbert spac…
This paper develops a statistical formulation of nonequilibrium processes at the metal electrolyte interface, focusing on the electrical double layer beyond the Gouy Chapman Stern approximation. Using generalized correlation functions and a Fokker Planck description of ionic motion, the authors deri…
This study examines how the dissociation cross sections of H2+ ions formed by electron impact from methane and n-butane depend on the energy of the ionizing electrons. Using a double mass spectrometer with neon as the collision gas, the authors measured dissociation of 3.8 keV H2+ ions and compared …
This study investigates whether naphthalene molecules in solid polymer solutions are excited to triplet states during irradiation by fast electrons, a process previously difficult to observe because of recombination luminescence. Using electron paramagnetic resonance at 100 K, the authors examined n…
The study examines the relative reactivity of 1,3-butadiene, 1-butene, and cis- and trans-2-butene in cationic copolymerization. Using C14-labeled butadiene, the authors determined copolymer compositions at low conversion in ethyl chloride and toluene solutions with aluminum ethyl dichloride based c…
This paper studies analytic mappings of bounded domains in complex Euclidean space through the variational characterization of the Bergman function. It defines a class of mappings normalized by the modulus of their Jacobian at a point and proves that the reciprocal infimum of the squared integral of…
This study examines how the size and branching of alkyl substituents in O-ethyl-S-alkylmethylthiophosphinates influence their inhibition of horse serum cholinesterase. A series of compounds bearing tert-butyl or isopropyl groups at different distances from the phosphorus atom was synthesized, and in…
The paper studies convolution type integral equations on the half line with integrable kernel and right hand side, under the condition that the Fourier transform satisfies \(1-K(t)\neq 0\). By extending the equation to the whole line and applying Fourier transforms, the problem is reduced to a Wiene…
This study examines the structural directionality of diketene addition to monosubstituted ureas, focusing on whether acetoacetylation occurs at the unsubstituted or substituted nitrogen. Alkylureas were reacted with diketene under different media, including pyridine, chlorobenzene with pyridine, and…
This paper determines the electron-affinity energies of copper, silver, and gold atoms using negative surface ionization on a heated polycrystalline tungsten filament. Molecular beams of the metals and potassium iodide were directed onto the filament, and negative ion currents were measured with a m…
This note addresses the statistical mechanical formulation of the osmotic theory of solutions, in which the thermodynamics of a solution can be expressed through properties of the dissolved substances. For monatomic molecules with pairwise interactions, it derives expressions for the activity coeffi…
This paper studies the topological analogue of the Baer radical for associative Hausdorff topological rings, defining it by transfinite iteration from closures of sums of topologically nilpotent ideals. It establishes general characterizations and inclusion properties, including that the radical is …
This paper examines elastic wave velocities in ultrabasic rocks from the Monchegorsk pluton under hydrostatic pressures up to 4000 kg/cm², with the aim of improving interpretation of deep crustal and upper mantle seismic data. Using dynamic measurements on pyroxenites, peridotites, and related norit…
The paper examines ultrasound generation at p-n junctions made from nonpiezoelectric semiconductors, proposing a mechanism based on the electrostatic attraction of ionized donors and acceptors in the space-charge region. A theoretical treatment derives the lattice deformation, radiated wave amplitud…
The study examines the induced reactivity of polymeric and monomeric compounds with conjugated systems toward 1,1-diphenyl-2-picrylhydrazyl in solution, with particular attention to the role of paramagnetic centers. Using electron paramagnetic resonance, spectrophotometry, chromatography, and ebulli…
This paper estimates whether cosmic radio sources such as radio galaxies and supernova remnants can produce detectable X-ray emission in the 1 to 100 Å range. It develops approximate flux formulas for synchrotron X-rays from relativistic electrons, including internal and Galactic absorption, and app…
The paper studies the motion of a rigid body with a fixed point when the center of gravity and the vector representing internal cyclic motion lie along a principal axis of inertia. Starting from the equations of motion and their known integrals, it presents two explicit particular solutions in which…
This study examines how ultrasonic oscillations affect coagulation structure formation in aqueous dispersions of Cherkassy montmorillonite and palygorskite, montmorillonite clays. Using structural mechanical measurements, X-ray structural analysis, and electron microscopy, the authors relate changes…
The paper studies plane-parallel transonic gas flow near the throat center of a Laval nozzle for Cauchy data in which the axial velocity behaves as a power law with exponent between 1 and 2. Using self-similar variables, the governing transonic equations are reduced to an ordinary differential equat…
