SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25456 full-text translations 14926 English PDFs 22540 abstracts
Showing 50 of 25456 papers
The paper studies existence of solutions for nonlinear evolution equations in Hilbert space of the form v' + A(t,v)v = 0, using fractional powers of positive self-adjoint operators. It first establishes estimates and differentiability properties for the evolution operator associated with a time-depe…
The paper examines the reaction of phenyliodoso acetate and related phenyliodoso compounds with several beta-diketones and beta-keto esters in order to clarify the mechanism of their interaction. On the basis of product isolation, counter synthesis, and ultraviolet and infrared spectral characteriza…
This study examines the kinetics of hydrogen ion discharge and anodic dissolution on single crystal silicon electrodes in acidic and alkaline electrolytes, using n-type and p-type specimens of different resistivities. Polarization measurements in sulfuric acid, hydrofluoric acid, and potassium hydro…
This paper examines the structure of products formed by adding alkylsulfenyl chlorides to acrylic acid, substituted acrylic acids, and their esters, a problem complicated by possible isomerization of halo thio propionic derivatives. The authors prepare a series of addition products and use comparati…
This paper studies nontriviality criteria for certain Gelfand-Shilov type spaces of infinitely differentiable functions defined by growth bounds involving two sequences, and for related spaces of entire functions with prescribed exponential estimates. Using auxiliary entire functions and infinite pr…
This paper examines the metallochemical properties of niobium and classifies the elements of the periodic system according to their modes of interaction with it. Using electronic structure, atomic radius, electronegativity, crystal structure, melting point, and literature data on binary systems, the…
This paper reports low-temperature measurements of the anisotropy of the Hall effect in high-purity single-crystal tin, motivated by the use of galvanomagnetic phenomena to probe Fermi-surface topology. At 4.2 K and magnetic fields up to about 7 kOe, the Hall-field vector was reconstructed from two …
This paper examines whether dark electrical conductivity in selected organic semiconductors is associated with the singlet excited state or the triplet state of the molecule. Sublimed solid layers of benzophenone, anthranilic and phenylanthranilic acids, several phthalimides, fluorescein, and severa…
This paper examines the reactivity of newly accessible 1,2-diaryldiboranes toward olefinic and diene hydrocarbons under inert conditions. Experiments with propylene and butene-1 show addition followed by rapid symmetrization to triphenylboron and trialkylboranes, while reactions with butadiene and i…
This study examines the mechanism and kinetics of hydrogen reduction of cobaltous-cobaltic oxide, addressing conflicting interpretations of whether cobalt monoxide is an intermediate phase at low temperatures. Reduction experiments were conducted at 225 to 350 degrees and varied hydrogen pressures, …
This paper examines the liquid phase autoxidation kinetics of isopropylxylenes and related polyalkylbenzenes with adjacent alkyl substituents. Using catalytic oxidations with manganese and cobalt salts, product analysis, co-oxidation experiments, and isolation or identification of acids, alcohols, k…
This paper reports measurements of the saturated vapor pressure of tetrachloroalkanes containing 9 to 17 carbon atoms at low pressures, a range needed for calculations of molecular and high-vacuum distillation processes. The authors used a static tensimetric method in which vapor force deflects a su…
This paper studies regularity and solvability for multidimensional elliptic variational problems and related quasilinear elliptic boundary value problems. It proves that a generalized minimizer with bounded first derivatives for a uniformly elliptic variational integral with Hölder smooth coefficien…
This article reports an x-ray diffraction study of the atomic scattering factor and electron-density distribution in germanium, undertaken as part of a comparative investigation of group IV semiconductor crystals. Powdered n-type single-crystal germanium was measured using Cu K alpha radiation, with…
This paper studies scattering of plane waves for the wave equation with a nonstationary potential in three-dimensional space, using Fock radiation conditions to characterize outgoing waves. The scattering problem is reduced to an integral equation with the retarded Green function, and existence and …
The paper studies the construction of the Cauchy function for a linear ordinary differential operator of order n, a task equivalent to constructing a fundamental system of solutions and hence to integrating the corresponding Cauchy problem. It proposes an iterative approximation scheme beginning wit…
This paper studies the large-time behavior of solutions to a Cauchy problem for a quasilinear reaction-diffusion equation arising in combustion theory, with step-like initial data and nonlinear source terms that may be nonpositive near one equilibrium and positive on part of the interval. Under spec…
This communication examines the stereochemistry of intracomplex uranium(VI) compounds formed with several azomethine Schiff bases derived from o-hydroxyaldehydes, ethylenediamine, aromatic amines, and 2-aminopyridine. Elemental analyses and thermal behavior of the complexes are used to infer ligand …
The study examines the addition of trichlorogermane to a series of chlorinated ethylenes, reactions that are difficult or low yielding for analogous chlorosilanes. Trichlorogermane was found to add readily without catalysts to vinyl chloride, dichloroethylene, trichloroethylene, and tetrachloroethyl…
This paper examines whether luminescence quenching can be used to study intramolecular energy transfer along aliphatic methylene chains. A kinetic scheme is developed for gamma-excited solutions containing dioxane solvent, terphenyl activator, and alcohol quenchers, and relative light yields are use…
This study examines whether leuco bases of triphenylmethane dyes undergo radiation oxidation in oxygen-free organic ketone solutions through products of solvent radiolysis. Nitrogen-saturated solutions, chiefly leuco crystal violet in acetone and methyl ethyl ketone, were irradiated with gamma rays,…
A thermographic procedure is described for estimating small thermal effects in milligram to centigram samples at temperatures below 0 degrees, including the liquid nitrogen region. The apparatus uses a low-inertia copper, constantan thermocouple, radiant heating in a small evacuated cryostat, and ca…
This paper derives the energy distribution of bremsstrahlung emitted by a longitudinally polarized relativistic electron in the Coulomb field of a nucleus, with attention to the circular polarization of the emitted photon. Using the Born approximation, it integrates a previously obtained angular dis…
This paper examines the thiocyanation of 2-arylindandiones-1,3, a previously unexplored class of thiocyanate derivatives related to pharmacologically active indandione anticoagulants. The authors prepare 2-thiocyano-2-arylindandiones by substitution of 2-bromo derivatives with potassium thiocyanate …
This paper addresses the determination of rate constants and activation energies for elementary reactions of hydrogen atoms with saturated hydrocarbons, reactions important in hydrocarbon oxidation and cracking. The authors propose a modification of inhibition methods based on the increase of the lo…
The study examines the temperature dependence of the liquid vapor separation coefficient for the isotopic system C13O and C12O over a pressure range extending above atmospheric pressure. Carbon monoxide samples of natural composition and samples enriched to 23 and 32 percent C13 were purified, chara…
This paper analyzes measurements from three electrode traps on Soviet space rockets to infer ionized gas and energetic electron conditions near Earth and in interplanetary space. From collector currents and estimates of spacecraft potential, the authors argue that electron fluxes above 200 eV in the…
This paper examines the formation, reactivity, and structural interpretation of iodonium derivatives obtained from 5-phenylcyclohexane-1,3-dione and phenyliodoso compounds. The authors prepare enolatebetaine phenyl-(5-phenylcyclohexanedione-1,3-yl-2)-iodonium and study its cleavage under acidic, bas…
This paper reports electron-optical measurements of detonation-front temperatures in transparent liquid explosives and semitransparent solid explosive charges, using photomultiplier recordings of end-face luminosity through optical filters. The authors apply a color-temperature method calibrated aga…
This paper applies the contour integral method to a mixed initial boundary value problem for second order equations with discontinuous spatial coefficients in two bounded domains separated by an interface. The argument reduces the problem to a parameter dependent spectral boundary problem, construct…
This paper constructs and studies invariant torsion-free affine connections on homogeneous spaces whose motion group contains a nonmaximal equipped stationary subgroup. Using chains of equipped subgroups and associated decompositions of the Lie algebra, it derives differential equations for geodesic…
This paper studies bounded Hilbert space operators whose spectrum is real and whose imaginary part is completely continuous, under an additional spectral cutting condition defining the class Omega. It constructs an ordered continuous family of invariant projections and analyzes the associated spectr…
This paper investigates the activation energy for thermal dispersal of silver atom groups during the early formation of a latent photographic image in silver bromide emulsions. It develops and extends Meiklyar’s analysis of long-exposure nonreciprocity isopaque curves to cases where the thermally st…
The study reports the synthesis and reactions of ferrocene mono- and disulfinic acids, with emphasis on preparing ferrocenedisulfinic acid by zinc reduction of the corresponding disulfonyl chloride. The authors examine the stability and solubility of the acids and sodium salts, and show that both su…
The paper formulates an n-dimensional analogue of a previously studied first-order system by representing the unknowns as differential forms on a compact Riemannian manifold. It expresses the systems and their metrically adjoint counterparts using exterior differentiation and its adjoint, giving exp…
This paper studies homogeneous three-point difference schemes for one-dimensional second-order boundary-value problems with variable coefficients, focusing on canonical and conservative schemes defined through coefficient functionals. It formulates moment conditions for first- and second-order appro…
Molar volumes of gaseous solutions of water in compressed ethylene were measured by a constant-volume piezometer method at 200 to 300°C and pressures up to about 100 to 150 atm. The experimental pressure, volume, temperature data for several compositions were analyzed with a virial equation of state…
This study examines the coprecipitation of microquantities of germanium, present as germanic acid anions, with ferric hydroxide and evaluates factors affecting its completeness. Experiments varied temperature, contact time, Ge:Fe ratio, germanium concentration, electrolyte addition, and pH, with ger…
This paper determines the rate constant for the elementary reaction of atomic oxygen with molecular hydrogen to form hydroxyl radicals and hydrogen atoms, a step important in oxidation mechanisms but previously lacking reliable kinetic data. The authors derive a relation between the first ignition l…
This paper examines whether hydrazine decomposition, initiated as a heterogeneous catalytic reaction, can continue in the gas phase under conditions suggesting a radical chain mechanism. Using differential calorimetry with a thermocouple measuring relative heating between catalyst and gas phase, the…
This paper examines the reaction of alkylcyclosiloxanes with titanium tetrachloride as a route to titanium-containing organosilicon compounds. The authors report that octamethylcyclotetrasiloxane and hexaethyltricyclosiloxane react with titanium tetrachloride above 140 degrees Celsius without added …
This paper addresses the construction and size estimation of nonbinary error-correcting codes for signals over residue classes, where correction of d symbol errors requires pairwise Hamming distance at least 2d + 1. It develops a linear coding construction for prime code bases by choosing systematic…
This paper studies the composition of singular kernels defined on a closed multidimensional Lyapunov surface in Euclidean space. Under stated size, continuity, and principal value conditions, it proves estimates for the composed kernel and for its increments, including simplified forms when one or b…
This paper examines whether the stretching frequency of the carbonyl group can be used as an indicator of carbonyl bond polarity in compounds with unusual ring structures, especially sydnones and tropone. Using infrared spectra measured on a two-beam spectrometer and integral band intensities determ…
This study examines the condensation of trimethylethylsilane and dimethyldiethylsilane under a high-voltage silent discharge at audio frequency in hydrogen, a reaction not previously investigated for tetraalkylsilanes. The authors identify gaseous products and characterize liquid and high-boiling co…
This paper examines the catalytic role of copper ions in the dissolution of silver in ammoniacal solutions under oxygen depolarization, a process thermodynamically favorable but kinetically hindered by slow electron removal from the metal surface. Using rotating disk experiments in an autoclave, the…
This note examines excitation and absorption in the spin system of a Heisenberg ferromagnet subjected to a spatially inhomogeneous electromagnetic wave, a situation relevant to magneto-optical phenomena. Using linear response in terms of retarded Green functions, it derives the average rate of energ…
The paper proposes a continual model of control systems intended to describe biological media more naturally than discrete automata or logical networks. It defines an active tissue whose points have instantaneous excitation, refractory time, phase-dependent propagation velocity, and possible spontan…
This paper examines the induction of alternating eddy currents in an enclosed sea during magnetic storms, motivated by earlier observations of horizontal telluric currents in the ocean. Treating the sea as shallow and circular, the author derives a simplified Maxwell-equation model for currents gene…
This paper generalizes Agmon’s results on the distribution of singularities of Dirichlet series to a broader class \(B(r,h)\) of functions represented by limits of generalized Dirichlet polynomials with clustered exponents satisfying a gap condition. Using representations by divided differences and …
