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
The study examines electrolytically mixed platinum and ruthenium deposits as catalysts for methanol electrooxidation in acidic and alkaline media, motivated by the possibility that mixed platinum metal catalysts can exceed the activity of their components. Deposits with varying ruthenium contents we…
This paper studies solution counts for systems of congruences and Waring type equations associated with equal sums of powers, with emphasis on estimates for smaller numbers of variables than those covered directly by Vinogradov’s mean value theorem. It proves that a previously known estimate for a s…
This paper examines glass formation and crystallization behavior in aqueous systems containing EDTA complexonates and related complexone salts. Using observations of crystallization, refractive index measurements, infrared spectra, X-ray amorphous characterization, thermographic analysis, and physic…
The paper reports an electro-optic rotation of the plane of polarization in z-cut plates of tetragonal ADP-type crystals, illustrated mainly with KDP, when an electric field is applied along the optical axis. Using conoscopic patterns between crossed polarizers, the author identifies characteristic …
This paper examines synthetic transformations of phosphites of novolac resins as routes to oligomeric phosphorus compounds and network polymers. Acid phosphites of novolacs were converted through reactions with chloral, sulfuryl chloride, amines, mercaptans, sulfur chlorides, and related reagents in…
This study investigates the cobalt, carbon and nickel, carbon systems at carbon concentrations and temperatures beyond those previously examined, with emphasis on phase equilibria at high carbon contents. Alloys were saturated with carbon in graphite crucibles, quenched from high temperatures, and a…
This paper studies differential pursuit and survival games in a convex planar set with multiple pursuers and evaders moving at constant speeds and able to change direction continuously. It extends earlier two-player formulations to games with several pursuers against one evader, one pursuer against …
This study investigates the synthesis of metal polyalkylenephosphonates from oligomeric and high-molecular-weight polyalkylenephosphinic acids obtained by oxidative chlorophosphination and hydrolysis of polyolefin materials. Salts of alkali, alkaline-earth, and heavy metals were prepared by neutrali…
This paper investigates the thermal stability and crystallinity of graft copolymers of styrene with epsilon-caprolactam as functions of copolymer composition. Differential thermal analysis with simultaneous weight-loss recording was used to determine melting behavior, decomposition onset, and heats …
This paper studies when a formal change of variables reducing an analytic system of differential equations near a singular point to normal form is convergent. Building on earlier normal form results, it formulates conditions on the eigenvalues and on the resonant terms of the normal form, including …
This study examines whether 3-(3,4-dihydroxyphenyl)alanine, DOPA, can serve as a selective carrier of radioisotopes into melanoma tissue, based on its role in melanogenesis and its expected incorporation into melanoproteins. The authors synthesized DOPA labeled with carbon-14 from glycine-2C14 throu…
This note studies the high energy asymptotic behavior of the spectral function for semibounded self-adjoint extensions of constant-coefficient hypoelliptic differential operators on domains in Euclidean space. It introduces a broad class of operators characterized by a growth condition on the model …
This paper investigates electrochemical phenomena during epitaxial growth of germanium on germanium by a gas transport reaction in hydrogen saturated with water vapor. Using a small gap arrangement with two germanium rods and a moving heater, the authors measured the electromotive force and current …
The study investigates low-energy charged particles produced in the photodisintegration of beryllium-9 under bremsstrahlung irradiation with a maximum photon energy of 35 MeV. Using photographic plates in a magnetic field, particle ranges and track curvatures were measured to distinguish protons, de…
This note proposes that periodic and sporadic luminosity variations in quasi-stellar radio sources can arise within a magnetobremsstrahlung, or synchrotron, emission framework through changes in magnetic-field strength and, in some cases, relativistic electron concentration. Using the observed varia…
The paper studies S. N. Bernstein’s modified interpolation process in the complex domain, extending a method previously considered mainly for real variables. For functions analytic in the unit disk and continuous on its closure, it proves uniform convergence inside the disk for interpolation polynom…
This paper examines the anomalous pressure dependence of the superconducting transition temperature of thallium and its relation to changes in the electronic spectrum. The authors measured how bismuth and mercury impurities of different valence modify dTk/dP in high-purity thallium solid solutions u…
This paper examines how to represent the scattering matrix directly in the Heisenberg representation within axiomatic quantum field theory. Starting from an in-representation written as a Dyson chronological exponential of an effective interaction Hamiltonian, the authors introduce a “half” S-matrix…
The paper studies spectral conditions associated with strong mixing for stationary Gaussian processes in discrete and continuous time, using analytic functions built from the logarithm of the spectral density and Hardy space approximation methods. For discrete time, it relates mixing to properties o…
This paper introduces extremal spaces, algebraic structures equipped with maximum and minimum operations and scalar multiplication over an extremal field, as a framework for studying extremization independently of ordinary addition. It develops basic order, independence, decomposition, and metrizati…
The paper introduces a class of regular graphs represented by vertices placed on an infinite rectangular lattice, with edges allowed only between nearest horizontal, vertical, or diagonal neighbors, motivated by problems in automated design of computing units and systems. It derives basic structural…
This paper studies prediction of binary discrete-time random processes when the correlation or spectral function is not known in advance. For homogeneous Markov processes with finite dependence length and a limiting distribution, it derives the minimum attainable mean prediction error over Boolean f…
This paper develops a priori estimates for generalized solutions of linear second-order elliptic and parabolic equations with measurable coefficients under integrability assumptions. It introduces classes of functions satisfying energy-type inequalities and derives integral, distributional, exponent…
This study examines the melting behavior of polyethylene under pressure using thermographic analysis, with attention to how molecular order, branching, crystallization conditions, and deformation affect melting kinetics and temperature intervals. Three polyethylene samples of differing branching and…
This paper studies unbiased estimation for finite mixture type families of probability measures whose coefficients are nonnegative linearly independent functions of an abstract parameter. For estimable parameter functions, the authors characterize admissibility under quadratic loss by reducing the p…
This study examines the aluminum chloride catalyzed isomerization of several bridged and fused bicyclic hydrocarbons of composition C9H16, a class whose transformations were less well characterized than those of alkanes and monocycloalkanes. Using gas chromatographic analysis of products formed at 5…
This paper extends earlier results on the reduction method from scalar equations to systems of Wiener-Hopf type equations and related operator equations. It gives necessary and sufficient conditions for finite truncated systems to be uniquely solvable and for their solutions to converge in the corre…
This paper argues for a cyclic four-membered transition state in bimolecular electrophilic substitution reactions at saturated carbon atoms in organomercury compounds, especially in nonpolar or weakly polar solvents. Drawing on kinetic order, stereochemical retention, solvent and ligand effects, com…
This paper reports experimental determination of the dynamic unloading behavior of Sh-65 rubber cord under transverse impact. Tests used a pneumatic impact apparatus with an added mass to reduce striker velocity during impact, while high-speed photography provided the established post-unloading velo…
This paper examines the zero line in vacancy chromatography as a basis for continuous analysis without periodic dosing. The authors derive relations showing that, when mixture composition varies with time, the deviation of the zero line is proportional to the rate of change of component concentratio…
A matrix method is developed for calculating forced oscillations in a finite inhomogeneous iris-loaded circular radio waveguide represented as a chain of nonidentical multiport cells. The fields at cell apertures are expanded in finite systems of basis functions, reducing the electromagnetic problem…
A heat-conducting differential calorimeter based on the Calvet microcalorimeter principle is described for direct kinetic measurements of radiation polymerization, including in viscous, solid, and irradiated monomer systems where dilatometric or gravimetric methods are limited. The instrument uses m…
This study examines the effect of cadmium sulfate and cadmium chloride on hydrogen sorption and the catalytic behavior of palladium black during hydrogenation of dimethylacetylenylcarbinol. Charging curves and kinetic potential measurements show that cadmium ions adsorbed on palladium shift hydrogen…
The paper examines the mechanism of phenol alkylation by higher olefins in the presence of cation exchange resins, with attention to whether alkyl phenyl ethers can form and rearrange under these conditions. Phenoxyoctane, chosen as a relatively resistant normal-chain ether, was synthesized and pass…
The paper proves a local existence and uniqueness theorem for the Cauchy problem for the Boltzmann equation describing nonstationary flow of a rarefied gas of structureless particles past a convex body. The authors reformulate the integral equation to incorporate general probabilistic boundary refle…
This study examines water-soluble products formed during the natural oxidative degradation of humic acids in weathered coal from a permafrost region of northeastern USSR. Hot-water extracts from Kadykchan coal were acidified, esterified, fractionated by vacuum distillation and partition chromatograp…
This note studies interpolation by analytic functions in the unit disk whose Taylor coefficients belong to l^p, with emphasis on the image of l_A^1 on subsets of the disk and on zero sets for l_A^p when p is greater than 2. It proves that any Carleson set contained in the open disk is finite, and fo…
The study examines how adsorption of the long-chain cationic surfactant cetyldimethylbenzylammonium chloride affects structure formation in concentrated aqueous quartz suspensions. Adsorption, sedimentation volume, and limiting shear stress were measured and compared to infer the development of adso…
This study examines the reinforcing action of active carbon blacks in rubber, focusing on the formation and stability of interconnected polymer and filler structures. Unvulcanized and vulcanized systems based on butadiene-styrene rubber, natural rubber, and stereoregular polybutadiene were prepared …
This study estimates the surface charge density of lyophobic sols from the adsorption of counterions at electrolyte concentrations causing coagulation. Hydrophobic sols of arsenic sulfide, antimony sulfide, mercury sulfide, silver iodide, and manganese dioxide were examined by direct radiometric mea…
This study examines how ultrasonic treatment affects coagulation structures in aqueous dispersions of Glukhovets kaolinite and Chasov Yar monothermite within the framework of physicochemical mechanics of disperse systems. Using structural-mechanical measurements, X-ray analysis, and electron microsc…
The paper studies when arbitrary functions analytic in a convex domain can be represented by Dirichlet series with complex exponents, noting first that such representation is impossible when the exponents lie on only one or two rays. It proves a representation theorem using an entire function of exp…
The paper studies stationary resonant rotational regimes in weakly perturbed nonlinear systems with one rotational coordinate and slowly varying parameters, without requiring the unperturbed system to be Hamiltonian. Assuming a periodic integral of the degenerate system is known, the authors transfo…
This paper calculates the interaction energy of simple adsorbate molecules with faujasite type zeolites, addressing both dispersion forces and induction effects in the electrostatic field of the lattice. Using an idealized zeolite model, the authors sum Lennard-Jones interactions with 111 nearby oxy…
