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 note examines reports of anomalous magnetic behavior in organic substances, including broad radio-frequency absorption, positive susceptibility, and apparent saturation magnetization, which had been interpreted as evidence for “pseudoferromagnetism” in ordered macromolecular structures. Dorfman…
This paper studies estimation of the parameters of a stationary Gaussian Markov process observed continuously on a finite interval, focusing on the mean, variance, and correlation decay parameter, with the diffusion coefficient treated as exactly determined by a single realization. Using likelihood …
This paper examines the thermodynamics of carbon dissolution in solid solutions of the Fe, Ni, C system, motivated by the observed minimum in carbon solubility near 75 at.% nickel. The authors measured the temperature dependence of the equilibrium between dissolved carbon and CO, CO2 gas mixtures at…
This paper examines the use of ruthenium catalysts for hydrogenating furan compounds, motivated by the limited prior study of ruthenium and the need for active, stable, and selective hydrogenation catalysts. The authors prepared several ruthenium contacts, including active ruthenium dioxide and supp…
This study examines the active toxic principle of dendrodochin, a metabolite of the fungus Dendrodochium toxicum with animal toxicity and antifungal activity. The authors cultivated a toxic strain under defined fermenter conditions, extracted toxic substances from acidified culture liquid with chlor…
This paper formulates exact Green function equations for two-particle bound states in a nonideal Fermi-Dirac system with four-fermion interaction at zero temperature. Starting from the Bethe-Salpeter relation and using particle-number conservation, it derives an additional independent relation betwe…
This item comprises a contents page for several biological sections of a 1962 issue, listing papers in botany, plant physiology, physiology, and parasitology with their starting pages. It also includes a correction to V. Ya. Urm’s earlier article on necessary and sufficient stability conditions for …
This study examines whether oriented polymer structures can be formed directly during monomer polymerization by using preoriented fibers as a matrix for macromolecular growth. Acrylonitrile vapor was radiation-polymerized on oriented kapron fiber, and the resulting polyacrylonitrile layer was analyz…
This study investigates photochemical processes in frozen benzene solutions of methylcyclohexane and 3-methylpentane at 77 K under ultraviolet irradiation. Using electron paramagnetic resonance, ultraviolet spectroscopy, gas analysis, and mass spectrometry, the authors identify hydrocarbon radicals …
This note studies representability of commutative formal groups over an algebraically closed field of characteristic p, contrasting the commutative case with known results for noncommutative formal groups. It relates the local formal group structure of an abelian variety over a finite field to the p…
This paper develops a thermodynamic method for estimating the nonspecific solvating ability of solvents toward polar particles from properties of the pure liquid. Using a van der Waals type compressed gas model, it derives an interaction parameter from saturated vapor pressure and density and constr…
This paper examines the origin of the odd photomagnetic effect observed when a p-n junction is illuminated in a weak magnetic field. The authors argue that the effect can be explained by ordinary photomagnetic currents in the homogeneous p and n regions, which introduce additional carriers into the …
This paper develops a thermodynamic framework for constructing nonholonomic continuum models that account for finite deformations, temperature effects, residual deformation, creep, relaxation, and related physicochemical processes. The authors introduce, alongside strain, stress, and temperature, an…
This paper investigates the electrical conductivity of molten polyamide kapron, a property less studied than conductivity in solid polymers. Kapron chips were melted under vacuum and measured in argon over 230 to 290°C, with conductivity examined as a function of temperature, holding time, and prior…
This paper investigates a manganothermic route for preparing the intermetallic compound manganese bismuth, motivated by the complexity and incomplete conversion associated with fusion, sintering, and amalgam methods. Mixtures of dried bismuth oxide and highly dispersed manganese powder were reacted …
The paper studies when selected ordinary double points of a real plane algebraic curve can be varied by small perturbations of the curve while preserving the total configuration of simple singularities. It formulates variability in the parameter space of curves of fixed degree and relates it to line…
The paper constructs finite-dimensional difference models for problems of mathematical physics, motivated by Kolmogorov’s question of approximating the two-dimensional viscous incompressible Navier-Stokes equations while preserving an energy dissipation law. It defines discrete analogues of gradient…
This paper investigates the kinetics of aquation of trans-chloronitro and trans-bromonitro bis-dimethylglyoximatocobaltiate ions in aqueous nitric acid, motivated by questions about substitution mechanisms and trans influence in cobalt dioxime complexes. The authors prepared and analyzed the corresp…
This note proposes an axiomatic framework for Lipschitz spaces, intended to capture properties invariant under mappings satisfying a local Lipschitz condition. The construction uses filters on finite classes of pairs in a set, defines separated and strongly separated Lipschitz structures, and shows …
This study examines how mechanical action alters the crystalline morphology of bulk polycaproamide, motivated by analogies between crystalline polymers and metals. Polycaproamide blocks prepared by caprolactam polymerization were subjected to cold rolling or repeated impact deformation, then fractur…
This study examines how rubbers of different molecular structure interact with thiobenzothiazyl radicals generated from di-2-benzthiazyl disulfide and related accelerator systems. Using the formation of 2-mercaptobenzothiazole as an indicator of hydrogen abstraction, the authors compare natural rubb…
This study examines how intramolecular interactions affect fluorescence in a series of synthesized azomethine compounds. Luminescence spectra were measured for powders, melts, and n-hexane solutions at 293 K and 77 K, with attention to substituent position and photochemical changes under ultraviolet…
This paper studies the classification up to orientation preserving diffeomorphism of simply connected smooth manifolds of dimension at least five that are homotopy equivalent and have compatible stable normal bundles. Using Thom spaces of normal bundles, transversality, normal framings, and surgery …
This paper examines whether homogeneous chemical kinetics can describe aqueous radiolysis at very high absorbed radiation intensities. Using the simplified Allen model, the authors analyze radiolysis of air-saturated ferrous sulfate solutions irradiated by fast electrons, considering competition bet…
This paper derives trace formulas for the Schrödinger operator in three-dimensional space with a smooth rapidly decreasing potential. It develops an asymptotic expansion for the resolvent kernel, relates the trace of the resolvent difference to the scattering operator and scattering amplitude, and u…
This paper examines how thiocyanato and selenocyanato groups are coordinated to cobalt in cobalt(III) ammine and bis-dimethylglyoximate complexes, addressing conflicting interpretations of their trans influence relative to nitro groups. The authors combine chemical evidence with goniometric and X-ra…
This paper studies local bifurcations of simple double points and cusps of real plane algebraic curves through the parameter space of curves of fixed degree. It formulates analytic elements in coefficient space describing curves with prescribed real or conjugate imaginary nodes and cusps, gives the …
This study examines how the surface state of germanium electrodes changes during anodic dissolution and how these changes relate to semiconductor properties and reaction kinetics. The authors measured the impedance of the semiconductor, electrolyte boundary, including resistance, capacitance, polari…
This paper describes the synthesis of amino acid and peptide derivatives bearing diethyleneimidophosphoryl or diethyleneimidothiophosphoryl groups, motivated by the antitumor activity of ethyleneimine-containing phosphorus compounds and the possibility of improving selectivity through amino acid or …
This study applies broad-line proton nuclear magnetic resonance to artificially prepared calcium hydrosilicates and calcium hydroxide, systems whose hydrogen positions and lattice structures were incompletely established. Experimental absorption-derivative curves for several hydrosilicate phases wer…
This study examines the ring, chain tautomerism of beta-acetopropyl and gamma-acetobutyl alcohols in solution, compounds whose actual structures had remained uncertain and which are considered models for ketoses. Ultraviolet absorption in the 200 to 350 nm region and infrared measurements of carbony…
This note treats a probabilistic problem in optimal control: estimating the probability that a Markov process in \(n\)-dimensional Euclidean space intersects a small moving surface during a prescribed time interval. Building on earlier work of Mishchenko and Pontryagin, it presents Kolmogorov’s simp…
The study examines the reactions of 3-aminopropene-1,2-thiocarbonate and related amino derivatives with ammonia and amines at elevated temperature, where aminothioglycol formation had been expected by analogy with known thiocarbonate reactions. Experiments instead showed formation of 1-hydroxypropen…
This paper proves a uniform approximation theorem for generalized analytic functions satisfying first order equations of the form w_{\bar z}+A(z)w+B(z)\overline{w}=0 with coefficients in L_{p,2}, p>2. The argument reduces special cases to approximation of analytic functions by rational functions wit…
This paper describes a method for synthesizing 1,2-disubstituted 4,6-dioxotetrahydropyrimidines from carbon suboxide and N-substituted amidines. After noting that unsubstituted amidines give N,N′-malonyl-bis-amidines rather than cyclized products, the author shows that N-substituted amidines react i…
This paper examines the frequency, temperature, and dc-voltage dependence of the resistance and effective dielectric constant of films of polymeric tetracyanoethylene complexes with metals. The authors interpret the observed semiconductor-like behavior using a heterogeneous two-layer model in which …
This study examines the low temperature polymerization of trichloroacetaldehyde as a route to chlorine-containing polymers expected to show reduced flammability and improved thermal and abrasion resistance. Using purified chloral in hexane under dry argon, the authors compared organometallic catalys…
This paper studies analytic functions in the unit disk whose integral mean of order delta is bounded, deriving sharp estimates for their values, derivatives, and related extremal quantities. Using Cauchy integral formulas, Hölder and Schwarz inequalities, automorphisms of the disk, and known coeffic…
This paper generalizes Huygens’ reciprocity theorem for the physical pendulum to a heavy rigid body undergoing Hessian motion about a fixed point. It introduces the kinetic axis and kinetic center of the body, relates them to the central axis of the momentum screw, and analyzes the Hess structural c…
This paper studies the long-time behavior of the action as an adiabatic invariant for one-degree-of-freedom Hamiltonian systems whose analytic Hamiltonian depends slowly and periodically on time. It argues that, unlike the linear oscillator where parametric resonance can accumulate changes, a nonlin…
This study examines supramolecular structure formation in isotactic polypropylene films as a function of melt temperature, cooling rate, and subsequent heat treatment. Films 30 to 130 microns thick were prepared by melting between glass slides, pressing at different temperatures, or annealing prefor…
This note studies the fundamental equations for realizing a surface with a prescribed metric in Euclidean space, using semigeodesic coordinates to reduce the Gauss and Peterson-Codazzi relations to two quasilinear equations. For negative Gaussian curvature, the characteristic curves are identified w…
This paper studies continuous Hermitian-indefinite kernels with a finite number of negative squares that satisfy an invariance relation with respect to an ordinary differential expression. Using the associated Pontryagin space and self-adjoint extensions of the induced operator, it proves that after…
This study examines the thermal decomposition of solid nitrosyl perchlorate, focusing on the previously uncertain composition of the solid phase during reaction. Nitrosyl perchlorate was decomposed in vacuum at controlled temperature, with interrupted experiments used to analyze solid residues and c…
This paper examines the limits of Bouguer’s law for atmospheric light transmission when multiple scattering becomes significant. Using approximate expressions for flux received through a scattering layer and a three layer atmospheric model including ozone, it argues that deviations from exponential …
The paper examines the propagation and deposition of a polydisperse atmospheric admixture released from an instantaneous point source, focusing on when vertical turbulent diffusion can be neglected relative to vertical dispersion caused by differing particle fall velocities. It extends earlier estim…
This note studies a two-point boundary-value problem for a first-order system of two ordinary differential equations under angular boundary conditions. Using polar coordinates and differential inequalities, it develops comparison theorems for angular functions of solutions and introduces classes cha…
This study examines the tuberculostatic activity and acute toxicity of newly synthesized derivatives of unsaturated aldehydes and ketones in the 5-nitrofuran series, comparing them with isoniazid and streptomycin. In vitro serial dilution tests were performed on sensitive and drug resistant strains …
