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 derives a particular three-dimensional solution of the equations of ideal plastic flow under the Huber-Mises yield condition in Cartesian coordinates. By assuming that selected components of the strain-rate tensor are independent of two spatial coordinates and that a shear stress componen…
This paper examines the extraction of uranyl nitrate by pyridine N-oxide derivatives, focusing on how substituent structure affects solvate formation and solubility in organic solvents. Spectroscopic, solubility, direct synthesis, and distribution isotherm data indicate that alpha-alkylpyridine N-ox…
This paper examines the mutual influence of atomic groups in molecules where a pi-bond system and a substituent containing a heavy atom are separated by a single-atom bridge, especially methylene, rather than directly conjugated. Using ultraviolet absorption spectra, with supporting references to vi…
This study examines whether anodic peaks in amalgam polarography of nickel arise from oxidation of surface nickel or nickel dissolved in mercury, and applies this distinction to determine nickel solubility and diffusion in mercury. A modified accumulation procedure was used in which nickel was pre-e…
This study measures the reflection coefficients of monoenergetic electrons with energies from 600 to 1200 keV from carbon, aluminum, zinc, tin, and lead. Using a vacuum scattering chamber with a collector system, the authors distinguish reflection of primary electrons from total reflection including…
This study examines the catalytic vapor phase isomerization of esters of beta-tetrahydrofurylpropionic acid and its alpha-methyl and alpha-ethyl homologs as a route to esters of gamma-ketoenanthic acids. The reactions were carried out over platinized carbon at 250 to 300 degrees, with products isola…
This paper examines the relationship between the acidity of ammine complexes and infrared frequencies of symmetric deformation vibrations of coordinated ammonia. Using reported and newly measured spectral data, mainly for platinum ammine complexes, the authors compare pKa values with the frequency s…
Single crystals of the ternary chalcopyrite compounds ZnSiP2, CdSiP2, and ZnSiAs2 were investigated as little studied wide band-gap semiconductors expected to show high carrier mobility. X-ray diffraction, optical, etching, microstructural, microhardness, and electrical measurements were used to det…
This paper outlines a method of local rearrangement of homeomorphisms of Euclidean space and applies it to isotopy problems for locally flat embeddings. For integers satisfying k less than two thirds of n minus 1, it proves that every homeomorphism of n-dimensional Euclidean space factors into a sta…
The paper studies centro-projective connections on differentiable manifolds with an almost complex structure, focusing on connections conjugate with respect to a copuncture and their relation to associated affine connections. It defines conjugate and symmetrically conjugate centro-projective connect…
This paper examines how quartzite specimens fracture under static, impact, and pulsating loads applied through a spherical contact, as a model for rock crushing between machine surfaces. Using petrographic thin sections and microscopic examination of fractured and indented specimens, the study compa…
This paper examines Friedel-Crafts alkylation of ferrocene, addressing the competing oxidation of ferrocene and its homologs to ferricinium salts that lowers product yields. The authors study alkylation with ethyl bromide and tert-butyl chloride in the presence of an equimolar aluminum chloride and …
The paper studies the first boundary-value problem for a fourth-order elliptic equation that degenerates on part of the boundary of a bounded domain, where the limiting equation has a quasi-parabolic character. It shows that the correct formulation of the boundary conditions depends on the sign of t…
This paper examines how the structure of bisphenol diol components influences the properties of synthesized polyarylates, with particular attention to substituents at the central carbon atom. Polyarylates prepared by equilibrium and interfacial polycondensation are grouped into three structural type…
This study examines whether ribbon-like supramolecular structures previously observed in thin rubber films also occur in bulk rubbers and persist during vulcanization. Using electron microscopy with lacquer-carbon and carbon replica methods on fractured or torn surfaces, the authors investigated iso…
This study examines how formation of intermolecular N-H...O=C hydrogen bonds affects the infrared absorption intensities of C=O and N-H stretching bands in four N-monosubstituted amides. Spectra of carbon tetrachloride solutions over a wide concentration range were used to compare associated and non…
This study examines the thermochemistry of uranyl nitrate extraction from aqueous solution by tributyl phosphate, focusing on the heat effect associated with formation of the uranyl nitrate tributyl phosphate solvate. Direct calorimetric measurements were used to determine the heat of extraction, th…
This paper examines primary radical formation during radiolysis of solid organic substances containing polar substituents, especially compounds of the type RX, where conventional homolytic bond rupture appears inconsistent with the Franck-Rabinowitch cage effect. It proposes heterolytic decompositio…
Decafluorodiphenyl was prepared from pentafluorochlorobenzene by a high-temperature Ullmann reaction and used to examine nucleophilic substitution in this highly fluorinated biphenyl system. Reactions with ammonia, hydrazine, dimethylamine, hydroxide, and methoxide gave the corresponding 4,4′-disubs…
This study examines how solid additives influence the mechanism and rate of gamma radiation polymerization of isobutylene and styrene, separately and jointly, in bulk at low temperatures. Using dilatometric and ampoule experiments with zinc oxide and finely dispersed glass powder, the authors compar…
This study examines the role of counterion sorption in the coagulation of negatively charged arsenic and antimony sulfide hydrosols by mixtures of electrolytes showing antagonistic, additive, or synergistic coagulating action. Using radiometrically labeled rubidium, calcium, strontium, and yttrium s…
This study examines the molecular-sieve behavior of carbon adsorbents, focusing on the accessibility of micropores to molecules of different sizes. Adsorption isotherms for water, benzene, oxygen, and nitrogen, together with mercury porosimetry, were used to characterize a heat-treated wood-based ca…
This paper studies the minimization of indecomposable Boolean functions arising in electronic relay and switching devices. It introduces a method of approximate nonseparable functional decomposition, in which an indecomposable function is converted into a nearby decomposable function by adding or ex…
This study examines the Mössbauer effect in a range of tin compounds, with emphasis on complexes in which tin has coordination number six. By comparing chemical shifts, quadrupole splitting, and relative probabilities of recoil-free resonant gamma fluorescence at 78 K and 300 K, the authors argue th…
The paper develops a consequence of K. Fan’s lemma that extends Tikhonov’s fixed point principle in locally convex separable topological vector spaces. It proves that for a continuous mapping on a convex compact set, affine in one variable and satisfying a solvability condition, there is a point sat…
This study examines how solvent-dependent supramolecular structure affects the mechanical properties and gel formation of amorphous isotactic polystyrene. Films prepared from chloroform and decalin solutions were tested mechanically at 20 and 120 degrees and examined by polarizing and electron micro…
This study examines the acid-catalyzed denitrosation of para-substituted phenyl-N-methylnitrosamines in sulfuric acid, a reaction relevant to diazotization chemistry and the Fischer-Hepp rearrangement. Using spectrophotometric kinetic measurements at 25 °C in the presence of urea, the authors relate…
The study investigates diffusiophoretic motion of aerosol particles in a water vapor diffusion field, a process relevant to fog scavenging, dust collection, and precipitation induction. A jet method was used in which a narrow aerosol stream passed between a wetted surface and a drying surface, and i…
This note studies nonselfadjoint extensions of symmetric operators with defect indices one and one generated by Jacobi matrices in a separable Hilbert space. Using the associated orthogonal polynomials and their polynomial kernel, it derives the characteristic function of the extension A_theta and i…
This paper proposes and experimentally examines a variant of elution gas chromatography in which the sorbent moves through the column, either in the same direction as the carrier gas or in the opposite direction. The authors derive expressions for retention time, band width, and a separation criteri…
This paper studies general boundary value problems for elliptic differential operators in bounded domains whose boundary is a union of smooth manifolds of different dimensions, extending earlier work on polyharmonic Dirichlet problems. It formulates Sobolev space settings and ellipticity conditions,…
This study examines the mechanism of radical formation during photoirradiation of frozen ethanol solutions of triphenylamine at 77 K, with emphasis on the role of hydrogen bonding. Electron paramagnetic resonance spectra were measured for ethanol, deuterated ethanols, and ethanol isopentane mixtures…
The paper examines the mechanism by which dimethylcyclosilazanes undergo acid induced rearrangements involving both ring expansion and, under some conditions, ring contraction. Because intermediates in the rearrangement could not be isolated directly, the authors used model reactions of trimethylchl…
This paper formulates a statistical description of the stress state of a deformable body when the stress tensor is treated as a random tensor field, arising for example from random external forces or statistically specified microinhomogeneity. It defines multipoint probability densities and tensor m…
This paper studies the motion in a Newtonian force field of a rigid body with fluid-filled cavities and a fixed point, using previously established equations and integrals for the system. Under specified relations among the principal inertia coefficients and parameters describing the force field and…
This study examines hydrosilylation reactions for systems previously lacking reported data: addition of methyl- and ethyldichlorosilanes to vinyl-substituted organocyclotetrasiloxanes, and addition of isoprene to a hydrogen-containing organocyclotetrasiloxane. Using chloroplatinic acid catalysis, th…
This note presents integral representation results for several classes of analytic functions, extending Paley-Wiener type theorems for entire functions of finite order and normal type. Using Mittag-Leffler type kernels, it gives parametric representations and uniqueness formulas for entire functions…
This paper examines structure, activity relationships in aliphatic aromatic aminocarbinol esters as local anesthetics. Drawing on accumulated synthetic and pharmacological data, the authors compare effects of chain length, branching, stereoisomeric form, acyl group, nitrogen substituent, and aliphat…
The study examines the gamma radiolysis and ultraviolet photolysis of selected Co(III) complexes, chiefly aquopentaammine and diaquotetrammine cobalt chlorides, with comparison to potassium trioxalatocobaltate(III). Changes in irradiated aqueous solutions were followed by absorption spectroscopy, pH…
This paper studies inverse conditions for the analyticity of the Jost function associated with a one-dimensional Schrödinger scattering problem on the half-line. It proves that if the Jost function is entire of growth order at most one and its deviation from 1 is square-integrable, under the stated …
This study examines the direct low-temperature synthesis of potassium zeolites from alkaline silica-alumina gels in the K2O, Al2O3, SiO2, H2O system, focusing on gel compositions with 70 to 95% water and crystallization at 90°C. Four potassium zeolite types were obtained, potassium chabazite, potass…
This paper addresses the synthetic preparation of neutral plasmalogens, aldehydogenic glycerolipids whose biological role and biosynthetic relationships were incompletely understood. The authors develop a route based on reversible transformations between long-chain aldehyde acetals and 1-alkenyl eth…
This study examines the behavior of zinc and cadmium tellurides in the liquid state, focusing on chemical interaction between the components in Zn, Te and Cd, Te melts. High-purity alloys of varied composition were prepared and analyzed by physicochemical methods using viscosity and electrical condu…
This paper describes the synthesis and characterization of several ferrocenylamine derivatives and examines oxidative transformations of ferrocenylamines. Diphenylferrocenylamine and monophenylferrocenylamine are prepared from bromoferrocene using sodium derivatives of diphenylamine or acetanilide i…
This paper derives a particular solution of the ideal plasticity equations in cylindrical coordinates under the Huber-Mises yield criterion. Assuming selected independence of the strain-rate tensor and shear stress components from the radial and axial coordinates, the displacement, strain-rate, and …
This paper reports a method for preparing thin silicon films that exhibit anomalously large photovoltages under illumination, a phenomenon previously observed in several semiconductors but not yet reliably explained. The films were deposited from p-type single-crystal silicon onto heated quartz subs…
This study examines the thermal decomposition rates of ten unsaturated organosilicon peroxides containing one, two, or three peroxide groups at silicon. Decomposition was measured iodometrically in sealed nitrogen-filled ampoules at 120, 130, and 140 degrees Celsius in aromatic solvents, and rate co…
This paper investigates the possibility of fixing molecular nitrogen under mild conditions using complex catalysts formed from transition metal salts and organometallic or hydride reagents. Guided by the hypothesis that nitrogen can be activated through formation of a metal pi-complex, the authors t…
This paper examines tritium concentrations in annual ice layers from the Fedchenko Glacier in the Pamir Mountains as a record of atmospheric tritium accumulation during 1951 to 1961. Ten samples were collected by annual layer at about 5000 m elevation, melted and mixed, and analyzed for tritium cont…
This study examines how supersaturation affects the activity of growth centers on the tetrahedral face of sodium bromate crystals, addressing theoretical predictions from dislocation-based crystal growth theory. Crystal growth was observed microscopically under steady conditions at 40°C, with repeat…
