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
This study examines the visible and ultraviolet absorption spectra produced when anthracene vapor is adsorbed under vacuum on silica, alumina, aluminosilicate gels, ion-exchanged aluminosilicates, KU-2 resin, and aluminum chloride. Diffuse-reflection spectroscopy shows that aluminosilicate surfaces …
This paper examines how the intensity of Raman scattering lines depends on the frequency of the exciting light, with attention to competing theoretical frequency factors and to the identification of electronic transitions effective in scattering. Absolute and relative intensity measurements were mad…
The paper presents a method for automating numerical solutions of elliptic boundary-value problems on high-speed computers by replacing a nonrectangular domain with a rectangular domain decomposed into elementary rectangles, including fictitious subdomains. It formulates matching conditions across i…
This paper studies the stability of the absolutely continuous spectrum of a self-adjoint operator under symmetric perturbations, extending results of Kuroda on the existence of wave operators and the resulting unitary equivalence of absolutely continuous parts. It proves a generalized criterion in w…
This paper examines how foreign quenchers affect fluorescence in solutions with high concentrations of fluorescent dyes, addressing conflicting earlier observations of either weakened or enhanced quenching. The authors measure absorption and luminescence spectra, fluorescence yield, and lifetime for…
The paper addresses the problem of explicitly constructing, for an arbitrary fixed real number lambda greater than 1, a real number theta such that the fractional parts of theta lambda^x are uniformly distributed. Extending beyond earlier constructions for integer bases and known special noninteger …
The paper studies nonlinear singular integral equations with a Cauchy kernel on a finite interval, focusing on bounded solutions in Hölder spaces under conditions that allow the kernel to grow arbitrarily fast with respect to the unknown function. Using estimates for Cauchy-type singular integrals a…
This study examines zirconium dioxide and titanium dioxide as promoters for a cobalt on kieselguhr catalyst in the atmospheric pressure synthesis of higher hydrocarbons from carbon monoxide and hydrogen. Catalysts were prepared by precipitation, reduced in hydrogen, and tested in a flow reactor with…
This paper studies nonstationary diffraction of a plane wave by conical obstacles and shows that, for the incident wave proportional to the minus one half power of the retarded time, the automodel solution inside the spherical front can be reduced to a Dirichlet problem for the Laplace equation. The…
The study examines catalytic transformations of n-alkanes on CaA zeolite molecular sieves, with emphasis on whether apparent selective dehydrogenation reflects true intracavity reaction selectivity or molecular sieving of products. Using n-dodecane cracking over tableted CaA zeolite, the authors mea…
This study investigates the interaction of ammonia with indium(I) bromide and iodide, addressing the previously little studied complex chemistry of monovalent indium. Using reactions with dry gaseous or liquid ammonia under controlled pressure and temperature, together with elemental analysis, therm…
This paper studies a specially constructed first order system of partial differential equations and uses it to analyze linear ordinary differential systems with quasiperiodic coefficients. It defines fundamental systems of solutions, introduces reducibility by Lyapunov type transformations, and exte…
This paper reports experimental observations of the flow of a viscoplastic clay suspension around blunt bodies, focusing on the formation of a forward stagnant zone not found in comparable flows of ordinary fluids. Bodies of several shapes were drawn through an open trough at controlled speeds, whil…
This paper studies when locally normal groups can be embedded isomorphically in direct products of finite groups or in related product classes. It proves that a finitely approximable locally normal group with countable center embeds in a direct product of finite groups, using a lemma on locally norm…
This paper investigates secondary electron emission from molybdenum bombarded by neutral argon atoms and argon ions in the 0.2 to 2.0 keV energy range, with emphasis on distinguishing potential and kinetic emission mechanisms. Neutral atom beams were produced by resonant charge exchange, ion and ato…
The paper studies the justification of the Fourier method for a mixed initial boundary value problem for equations of the form Au plus the second time derivative of u equals f, where A is a formally self-adjoint uniformly elliptic operator of order 2m in a bounded domain. Using generalized eigenfunc…
This paper studies additive abstract set functions on measurable subsets of a domain in Euclidean space with values in a Banach space, focusing on normality, absolute continuity, translation continuity, and convolution operations in the spaces \(\Phi_p\), \(\overline{\Phi}_1\), and related Sobolev-t…
This paper addresses the preparation and characterization of 3-methylbut-2-en-1-ol pyrophosphate, an allylic pyrophosphate implicated in enzymatic isomerization and carbon carbon bond formation during isoprenoid biosynthesis. The authors obtained isomerically pure 3-methylbut-2-en-1-ol, phosphorylat…
This study examines the polymorphism of trinitrobenzene, a compound for which previous reports described several unstable and stable crystalline modifications with differing melting points. Using differential microthermal analysis, repeated heating and cooling of highly purified samples, supercoolin…
This paper investigates how local increases in heat flux, or hot spots, along a heated channel affect the critical heat flux during forced-flow boiling. Experiments were performed in vertical stainless-steel tubes at 100 ata with varying mass velocities, channel lengths, hot spot lengths, and heat-f…
This study examines the formation of element oxygen element bonds in organolead compounds, focusing on the synthesis and properties of plumboxanes as analogues of siloxane, germoxane, and stannoxane systems. The authors show that diaryllead dicarboxylates undergo hydrolysis in aqueous acetone, and t…
This paper studies extremal properties of meromorphic functions with prescribed principal parts in bounded finitely connected domains with analytic boundary, using special functions determined by boundary values on straight lines of fixed inclination. It defines exterior area for such mappings and p…
This study examines electrical breakdown in aqueous electrolytes across a wide range of chemical compositions, conductivities, and interelectrode gap lengths using a pulsed capacitor discharge circuit with oscillographic measurements of voltage, current, delay time, and charge decay. The experiments…
This paper investigates secondary ionic and electronic emission from tantalum under bombardment by fast neutral sodium atoms, a process previously difficult to study because of limitations in measuring neutral atom beam intensity. The authors develop an experimental method based on resonant charge e…
Golovin develops a framework for polyidentical relations in groups, generalizing ordinary verbal identities by allowing words whose variables range over distinct specified subgroups of a group. The paper defines polyverbal subgroups, equivalence of systems of polyidentities, neutral polywords, and t…
The paper studies the high-frequency asymptotic behavior of the Green function for the two-dimensional exterior Neumann problem for the Helmholtz equation outside a sufficiently smooth bounded convex contour. Using an auxiliary function modeled on the exterior problem for the local circle of curvatu…
This paper studies a single-server queue in which customers arrive in random batches at renewal epochs, are served individually, and may experience an additional random start-up time when a batch finds the server idle. Under finite mean assumptions and the stability condition that the mean service r…
The note proves an existence theorem for a Frankl-type boundary-value problem for the Lavrent'ev-Bitsadze equation of mixed elliptic-hyperbolic type in a domain bounded by vertical half-lines, a smooth arc, and characteristics. The argument constructs a Green function using reflection and a Tricomi …
This paper characterizes strongly paracompact normal spaces in terms of their position inside the Stone-Cech compactification. It introduces the notion that a space is paracompactly situated in an extension when every neighborhood of the space contains a smaller paracompact neighborhood, and proves …
This note studies when the index of an elliptic boundary-value problem for a Petrovskii elliptic system in a bounded smooth domain is independent of the coefficients of the differential operator in the interior of the domain. Comparing two systems with the same boundary data near the boundary, the a…
This paper examines the structure of the catalyst formed from anhydrous ferric chloride and propylene oxide and its relevance to stereospecific polymerization of epoxide monomers. By decomposing the catalyst under mild conditions, analyzing elemental composition and molecular weight, and comparing i…
A gas chromatographic micromethod is presented for determining active hydrogen in organic compounds by measuring hydrogen evolved during reaction with lithium aluminum hydride in tetrahydrofuran. The authors designed an apparatus combining a reaction system with a chromatograph and membrane flow swi…
The paper examines the strong interaction of an infinitely heavy nucleon with a charged meson field, focusing on the divergence of the renormalized coupling constant that appears when the point-nucleon limit is taken in degenerate models. It modifies the Hamiltonian by adding a term that removes rot…
The paper studies pairs of T-congruences in which corresponding rays have constant distance and constant angle, using a moving rectangular trihedron adapted to the congruence of common perpendiculars. By deriving and transforming the differential equations governing the focal abscissas, ray position…
This paper reports a synthetic method for dialkyl S-dialkylaminothiophosphates, compounds containing covalently linked phosphorus, sulfur, and nitrogen atoms, whose earlier preparation from dialkyl S-chlorothiophosphates was hindered by formation of amine hydrochloride by-products. The authors propo…
The paper addresses the problem of determining whether the zero singular point of a planar continuous vector field is isolated and computing its Poincaré index when the field is represented by a finite Taylor expansion with a higher order remainder. It develops a finite algorithm based on successive…
This paper develops a thermodynamic treatment of fractionation for polydisperse linear copolymers that are heterogeneous not only in molecular weight but also in composition. Extending Flory’s polymer solution theory, it derives phase equilibrium relations for a copolymer solution separated into dil…
This paper studies the unitary representation of a semisimple Lie group on \(L_2(G/\Gamma)\), where \(\Gamma\) is a discrete subgroup and the quotient need not be compact. It develops the method of horospheres to isolate a subspace \(L_2^0(G/\Gamma)\), consisting of square integrable functions whose…
This study examines the acid-catalyzed interaction of toluene with phenylacetylene, extending earlier work on alkylation of aromatic compounds by acetylene derivatives. The authors tested sulfuric acid, aluminosilicate, boron fluoride etherate, and a boron fluoride, orthophosphoric acid complex, the…
This paper reports the synthesis of previously undescribed complexes of aldazines and ketazines with cuprous halides, formulated as azine compounds containing two or three equivalents of cuprous chloride, bromide, or iodide. The authors examine three preparative routes: reaction of hydrazones with c…
This paper studies class numbers through finite segments of Euler products associated with Dedekind zeta-functions, congruence zeta-functions, and Hecke or Artin L-series. Using zero-free information, including the possible presence of a Siegel zero, it derives formulas expressing the class number o…
The paper examines apparent degeneracies between hadron multiplets with isotopic spin T = 1 and corresponding singlets with T = 0, using then available data on mesons, hyperons, and resonances. It argues that these coincidences are associated with zero hypercharge, proposing that strong-interaction …
The study examines the reactions of benzoyl peroxide and acetylbenzoyl peroxide with diethylmercury, motivated by the role of peroxides in organometallic reaction mechanisms. Experiments were carried out without solvent under nitrogen, using excess diethylmercury at elevated temperature, and the gas…
The study examines the thermodynamic properties of the indium tellurides In2Te5, In2Te3, InTe, and In2Te in the binary indium tellurium system. Using electromotive force measurements of concentration cells across four heterogeneous phase regions, with phase identification by X-ray analysis, the auth…
This note characterizes semigroups whose complete lattice of subsemigroups, with the empty set adjoined, has relative complements. Using a lattice-theoretic criterion for relative complementation of intervals, it proves that this property holds exactly for semigroups in which every element is idempo…
This paper examines the origin of paramagnetic centers and electrical conductivity in organic systems with conjugated bonds, including polymers, molecular crystals, and donor acceptor crystals. It argues that both unpaired electrons and current carriers are associated with local charge transfer stat…
This paper investigates the cathodic incorporation of alkali metals into lead, zinc, and silver electrodes in aqueous alkaline solutions and its effects on electrode behavior. Using measurements of hydrogen overvoltage, double-layer capacitance, potential decay, electron microscopy, and diffusion th…
Proton nuclear relaxation in aqueous vanadyl sulfate solutions was studied by the spin echo method to clarify the strong dependence of relaxation parameters on acidity. Measurements of T1, T2, and T1/T2 during addition of nitric, perchloric, sulfuric, and oxalic acids show that increasing acid conce…
