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 intrinsic rates of reaction of graphitized carbon black with carbon dioxide and oxygen, addressing discrepancies in prior measurements caused by diffusion effects and changes in carbon structure. Using highly uniform carbon black graphitized at 2800°C and a flow-through layer…
This paper examines how orbital hybridization of halogen atoms influences carbon-halogen bond lengths in halogenated hydrocarbons. Using nuclear quadrupole interaction constants together with electronegativity relationships dependent on orbital S-character, the author estimates hybridization, ionic …
The paper develops a macrokinetic treatment of coupled homogeneous and surface reactions in moving media, motivated by cases where stationary-medium approximations are inadequate for liquids and gases. Using a tubular reactor as a representative geometry, it formulates convective diffusion with a bu…
The paper investigates the mechanism of the photochemical arylation of triphenylphosphine by diphenyliodonium borofluoride, yielding tetraphenylphosphonium borofluoride and iodobenzene. Experiments compare irradiation conditions, solvents, reagent ratios, and the effects of radical inhibitors such a…
This paper examines the semiconductor and optical properties of copper, nickel, zinc, and cadmium dithiocarbamate chelates and polychelates in relation to metal content and metal, ligand bonding. Electrical conductivity measurements, thermal activation energies, and electronic absorption spectra in …
This note studies continuous decompositions of metric spaces into closed sets and their application to closed images of metric spaces. It proves that, except for a sigma-discrete subfamily, the elements of such a decomposition are compact and have empty interior, using a convergence lemma for closed…
The note studies estimates for holomorphic functions of two complex variables in bounded complete bicircular and circular domains, with analogous extensions indicated for more variables. Using reductions to one-variable functions along complex lines, it proves sharp bounds for diagonal Taylor sums a…
The paper studies the classification of orbits in the dual of the Lie algebra of the group of upper unitriangular matrices under the representation dual to the adjoint action, motivated by Kirillov’s correspondence between such orbits and irreducible unitary representations of nilpotent Lie groups. …
The paper develops a kinetic treatment of catalytic and radiation-induced postpolymerization of crystalline solid monomers, emphasizing that chain propagation may be constrained by crystallographic orientation and terminated by lattice defects rather than by ordinary radical competition. It formulat…
The paper examines how Kirchhoff’s law relates absorption and emission line contours in gamma spectroscopy, particularly when thermal motion and photon recoil affect the observed spectra. It argues that, under conditions where stimulated emission is negligible and excited atoms thermalize before spo…
The paper treats the bending of composite anisotropic cylindrical bodies with a slightly curved axis under a transverse force, extending earlier work for isotropic materials. By introducing a coordinate transformation that reduces the curved body to an associated straight composite cylinder to first…
High-resolution proton magnetic resonance was used to examine the structure and electron-density distribution of six- and eight-membered organocyclosilazanes bearing dialkyl, alkylaryl, and alkenyl substituents at silicon. Chemical shifts of nitrogen-bound protons were found to be largely independen…
This paper reports the realization of repetitive giant pulse generation in a CaF2:Dy2+ optical generator under continuous pumping by xenon lamps. The experiment used a cooled CaF2:Dy2+ crystal in a resonator with a rotating total internal reflection prism for Q switching, and measured output with a …
This study examines the mechanism and rate-determining step in the acid-catalyzed hydrolysis of simple vinyl ethers through measurements of the kinetic deuterium isotope effect for the monovinyl ether of diethylene glycol. Hydrolysis rates in ordinary water and heavy water were determined at 20 to 3…
This note addresses the inverse problem of determining characteristics of a single-server queueing system with waiting from observations of its departure process, for a Poisson input flow and independent identically distributed service times. It derives relations between the Laplace transforms of th…
This paper discusses variations in atmospheric radiocarbon content as recorded in annual tree rings and their possible relation to astrophysical phenomena. Reviewing recent measurements, including reported radiocarbon changes near the time of the Tunguska event, the authors argue that high precision…
This paper develops an analogue of the Plemelj-Privalov theorem for Cauchy type singular integrals on closed rectifiable Jordan curves that may be nonsmooth, assuming a metric arc condition controlled by a function beta. It introduces generalized Hölder spaces defined by moduli of continuity, derive…
This paper addresses the difficulty of measuring the effectiveness of very weak inhibitors in chain radical polymerization, where conventional kinetic methods are insufficiently sensitive. It argues that in highly viscous media some termination reactions become diffusion hindered, allowing simplifie…
The paper studies scattering operators for pairs of unitary groups in Hilbert spaces under a generalized Lax and Phillips framework, without requiring the incoming and outgoing subspaces to be orthogonal or cyclic in the whole space. It defines wave and scattering operators, represents their suboper…
This study examines the temperature dependence of separation coefficients for the isotopic pairs D2, H2, D2, HD, and HD, H2 during sorption of ternary hydrogen isotope mixtures on synthetic zeolites NaA and NaX under isobaric conditions. Using circulation experiments at 90.4, 77.6, and 62.0 K and an…
This paper examines the isostatic state of Antarctica using gravimetric observations and calculations of topographic isostatic reductions. The authors compute isostatic anomalies at selected stations with Pratt Hayford and Vening Meinesz models, develop an approximate spherical function method for e…
This note studies the determinant of the general rational solution of the matrix equation AX = XB for two similar integer matrices A and B, using their quasi-natural normal form and the elementary divisors over the rational field. It derives explicit forms for the commuting solutions and gives produ…
This paper reports the synthesis and X-ray diffraction characterization of mixed molybdenum chalcogenides derived from molybdenum sesquichalcogenides and elemental chalcogens. Molybdenum sesquiselenide and sesquitelluride were first prepared by direct synthesis from the elements, and six mixed compo…
This study reports the synthesis of uridylyl-(5′→N)-phenylalanyl-3′(2′)-O-adenosine as a model compound for examining possible nucleotide-linked aminoacyl intermediates in protein biosynthesis. The compound was prepared from uridylic acid, converted to a reactive pyrophosphate derivative, and 3′(2′)…
This study examines how monolayers of soluble and insoluble surface-active substances affect energy dissipation in stationary cylindrical surface waves on aqueous systems. Measurements were made for caproic and capric acid solutions and compared with pure water and with insoluble myristic acid monol…
This study examines the thermodynamics of swelling and dissolution of cross-linked polyurethanes in dioxane, with cross-link density varied chemically while maintaining comparable urethane group concentrations. Sorption measurements and calorimetry were used to calculate chemical potentials, free en…
The note compares two definitions of cohomological dimension of a topological space with coefficients in an Abelian group: Aleksandrov’s definition via nonvanishing relative cohomology and Okuyama’s definition via epimorphic restriction maps to closed subsets. It proves that these definitions coinci…
The paper proposes a geometric and topological framework for relating physical constants to the properties of a unique total object represented by equivalent images in metrizable projective extensions. Using arguments from mapping theory, dimension theory, statistical distributions over configuratio…
This study examines the nature of irreversible polymorphic transformations in rare-earth oxides, focusing on whether reported C to A or C to B changes are true reversible polymorphic transitions or are coupled to changes in oxygen composition. Using high-temperature vacuum X-ray diffraction up to ab…
This paper develops kinetic equations for two-stage reactions on solid surfaces under general assumptions about surface inhomogeneity. Using a model in which adsorption sites differ by a desorption elasticity and applying the rule relating changes in equilibrium constants to changes in rate constant…
This paper studies high energy asymptotics for a one dimensional scattering problem governed by a second order differential equation with a real potential function tending to negative limits at infinity. Under analyticity and simple zero assumptions on the coefficient, it derives asymptotic formulas…
This paper reports low-temperature calorimetric measurements of the true heat capacity of crystalline black phosphorus, a comparatively stable layered modification whose thermodynamic properties had not been measured previously. A high-pressure preparation method was used to obtain a rhombic single-…
Khalfin examines whether the axioms and asymptotic predictions of statistical physics can be embedded in quantum dynamics, focusing on irreversible relaxation and decay in closed conservative systems. Using the quantum theory of decay and the spectral condition of a lower-bounded continuous energy s…
This paper examines the termination, or death, of free radicals in polymethyl methacrylate formed by radiation and mechanical action, with particular attention to how radical structure affects stability and reaction pathway. Using electron paramagnetic resonance measurements and analysis of volatile…
This study examines how organic surface-active additives affect the cyanide dissolution rate of gold, motivated by the faster dissolution observed in alkaline acetone cyanohydrin solutions. Using rotating-disk experiments in alkaline potassium cyanide solutions, the authors compare acetone, butyl al…
This paper describes synthetic approaches to complex lipoid compounds related to inositol phosphatides, cephalin derivatives, and phosphatidyl amino acid conjugates. Using protected myoinositol derivatives, phosphorus oxychloride or phosphorodichloridate intermediates, and α,β-distearoylglycerol, th…
This paper reports the synthesis and characterization of hexafluorodimethylhydroxylamine and its oxidation product, hexafluorodimethylnitrogen oxide, from reactions of trifluoronitrosomethane and related intermediates. Gas-phase reaction of trifluoronitrosomethane with ammonia gives hexafluorodimeth…
This paper studies a nonlinear singular integral equation with a shift on a finite interval, under Lipschitz-type and modulus-of-continuity assumptions on the shift function and kernel. Building on previously established existence and uniqueness in a Hölder-type class for sufficiently small paramete…
The paper develops a framework for abstract N-almost-periodic functions with values in a Banach space and proves approximation and uniqueness results via Fourier-Bohr type coefficients. It applies this framework to nonstationary abstract Cauchy problems with almost-periodic coefficients, giving cond…
This paper develops an analytical theory for the freezing of ionization processes in expanding gas jets, where decreasing temperature and density cause electron concentrations to depart from equilibrium and approach a finite frozen value. Starting from a kinetic equation with ionization and recombin…
This study examines the synthesis and polymerization behavior of organocyclotetrasiloxanes in which silicon atoms in the siloxane ring are also incorporated into benzo-fused silicon-containing heterocycles. Hydrolysis and cohydrolysis of 1,1-dichloro-3,4-benzo-1-silacyclohexane with dimethyldichloro…
