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 paper reports the synthesis and characterization of previously unknown furyl-2-acetylenic ketones and 5-nitrofuryl-2-acetylenic ketones, compounds of interest because their conjugated furan, acetylene, and carbonyl system may be relevant to biological activity. Furylacetylenic ketones were prepa…
This study examines the pore structure and sorption behavior of montmorillonite-containing trepel clays from several Volga region deposits. The authors compare adsorption structural analysis using water and benzene vapor isotherms, BET surface estimates, heats of wetting, mercury porosimetry, electr…
This paper examines the arbitrariness in applying the WKB method to Sturm-Liouville problems and argues that the transformation variable should be chosen so that asymptotic solutions have the correct behavior at singular points. By selecting a transformation that maps such points to infinity, the au…
This study examines how partial chlorination affects the thermodynamics of high-elastic deformation in gutta-percha. Purified gutta-percha was chlorinated to varying chlorine contents, vulcanized, and tested in extension at elevated temperatures, with stress-temperature data used to estimate entropy…
The study examines reactions of chloral with trialkyl and mixed phosphites bearing strongly electronegative substituents, focusing on deviations from the usual Abramov and Perkow reaction pathways. Equimolar reactions at room temperature were characterized by elemental analysis, melting points, mixe…
Magnetic susceptibilities of solid inner-complex compounds of nickel(II) and copper(II) with Schiff bases were measured at 297 K by the absolute Faraday method to assess their bonding and stereochemistry. The calculated effective magnetic moments show that nickel complexes range from diamagnetic beh…
This study examines reactions of thermalized electrons in frozen aqueous perchlorate and perchloric acid solutions irradiated with cobalt-60 gamma rays at minus 196 degrees Celsius. The authors estimate thermalized electron yields from perchlorate destruction and use steady-state competition kinetic…
Mössbauer spectra were measured for organotin compounds formed from dibutyltin oxide and carboxylic or omega-chlorocarboxylic acids, using Sn-119m dioxide as the gamma source and absorbers cooled to 77 K. Chemical shifts and quadrupole splittings were used to compare products obtained under stoichio…
This study examines resite type condensation products of o-dihydroxybenzene with formaldehyde, focusing on how heat treatment affects their magnetic, infrared, elemental, and electrical properties. Electron paramagnetic resonance measurements showed Lorentzian singlet signals with free-electron g fa…
This paper reports an electron paramagnetic resonance study of several benzoylhydrazyl free-radical derivatives in dioxane solution, with attention to hyperfine structure and the role of nitro substitution in the benzoyl residue. Experimental spectra were compared with calculated spectra to estimate…
This paper investigates the unusually strong influence of pressure on the optical absorption edge and ferroelectric transition of SbSJ single crystals, motivated by earlier observations of electric field induced shifts of the intrinsic absorption edge. Using hydrostatic pressure measurements, photoc…
This study examines how aggregation state affects the photoconductive and photoinduced EPR properties of triphenylmethane and xanthene dye layers, including crystal violet, brilliant green, malachite green, rhodamine 6Zh, and rhodamine B. Amorphous mirror-like layers and polycrystalline scattering l…
This paper analyzes chain termination at reactor walls when two interconverting active centers diffuse in a cylindrical vessel, with particular attention to regimes relevant to hydrocarbon oxidation. By solving stationary diffusion and kinetic equations with boundary conditions in which one radical …
This paper examines the reversible dehydrofluorination of 2-monohydroperfluoroisobutane and related esters under the action of triethylamine. The authors show that triethylamine alone leaves 2-monohydroperfluoroisobutane largely unchanged because equilibrium favors hydrofluorination, but benzoyl chl…
This paper reports the synthesis of methyl 9-O-glycyl-N-acetylneuraminic acid as a model O-aminoacyl derivative for studying possible linkages of neuraminic acid in biologically important biopolymers resistant to neuraminidase. N-acetylneuraminic acid was isolated from blood serum proteins, converte…
A closed numerical framework is formulated for calculating the evolution of vapor, liquid water, and ice in supercooled fine-droplet clouds when ice crystals enter naturally from above or are produced by artificial seeding. Under specified assumptions about droplet entrainment, spherical crystals, i…
This paper develops the construction of unitary representations for the inhomogeneous group P(SU_r), with particular motivation from relativistic SU_6 symmetry of elementary particles and with the Poincare group appearing as the case r equals 2. The authors formulate the generalized Wigner operator …
This paper reports an X-ray diffraction study of the effect of high pressure on the crystal structure of tin monoxide at room temperature, motivated by the layered PbO-type structure and low atomic coordination of SnO under normal conditions. Using a high-pressure X-ray camera calibrated by bismuth …
This note studies how far classical results of Zygmund on lacunary trigonometric series can be extended when intervals or sets of positive measure are replaced by exceptional sets, especially first category perfect sets of measure zero. It introduces and uses \(M\)-\(\omega(n)\)-sets, defined throug…
This paper examines the proposed mechanism behind water columns with anomalous properties formed by condensation of water vapor in freshly drawn glass capillaries, focusing on whether glass leaching can account for their reduced vapor pressure and other behavior. The authors measure electrical condu…
The paper determines imaginary parts of phase shifts, expressed as absorption coefficients, for elastic proton proton scattering at about 655 MeV by relating inelasticity to single pion production channels. Using Mandelstam’s resonance model, the analysis incorporates measured pion spectra and total…
This note revisits singular integral equations with a finite cyclic shift on Lyapunov contours, correcting an inaccuracy in an earlier proof concerning the adjoint problem and the index formula. The author proves the solvability criterion by relating the shifted equation and its adjoint to an associ…
This study examines how polar substituent effects influence cleavage of the carbon iodine bond in reactions of unsymmetrical diaryliodonium tetrafluoroborates with triphenylphosphine. A series of substituted diaryliodonium salts was subjected to photochemical and, for comparison, thermal reaction co…
This study examines how positive charge and aryl substituents affect the anticholinesterase activity of O,O-diethyl-S-[(beta-arylmethylamino)-ethyl]-thiophosphates and their methylsulfomethylates. A series of tertiary amine and quaternary ammonium organophosphorus inhibitors with different meta and …
This paper examines the mechanism of the elementary act in the solvent extraction of inner-complex metal compounds, specifically whether the extractable complex forms in the aqueous phase or at the phase interface. Zolotov proposes a kinetic test based on comparing extraction rates in solvents with …
The study examines relaxation behavior in amorphized crystallizing polymers during thermomechanical testing, focusing on polyethylene terephthalate, isotactic polystyrene, and polycarbonate. Using periodic compressive deformation over a range of temperatures and force frequencies, combined with X-ra…
This study examines the nature of “constitutional water” in selected heteropoly acids and salts after removal of crystallization water. Phosphomolybdic, phosphotungstic, and silicotungstic acids, together with sodium and barium phosphotungstate salts, were dehydrated to stable low-water structures a…
This study examines how oxygen chemisorption affects the work function and electrical conductivity of highly dispersed rutile titanium dioxide at room temperature. Simultaneous measurements of contact potential difference and alternating-current conductivity during oxygen adsorption and evacuation s…
This communication examines the feasibility of separating nitrogen isotopes by chemical exchange involving complex formation, extending an approach previously applied to other light elements. The authors test isotope fractionation between gaseous ammonia and the liquid ammonia complex with n-propyl …
This paper reports measurements of natural telluric currents made in 1963 at the drifting North Pole-10 station in the Arctic Ocean. The authors describe absolute observations of horizontal electric-field components using silver-chloride nonpolarizing electrodes, with corrections for electrode elect…
The paper studies fluctuations in the distribution of fractional parts on the unit interval through bounds relating local concentration in short half-intervals to trigonometric sums. It generalizes a theorem of G. A. Freiman by proving that, if no interval of length 1/2m and no pair of intervals of …
This paper develops a Thomas, Fermi approximation for estimating the volume dependence of the Grüneisen constant in monatomic solids, complementing existing calculations of cold pressure. Interatomic force changes caused by small nuclear displacements are treated through a perturbation equation for …
This paper examines the use of Lorentz-Lorenz molecular refractions for evaluating the structures of organic boron compounds, especially boron-nitrogen compounds. It proposes a statistical criterion for comparing experimental and calculated molecular refractions by assigning confidence limits to cal…
The paper studies linear isometries of nondegenerate vector spaces with symmetric or skew-symmetric bilinear metrics over an arbitrary field of characteristic not equal to 2. Using elementary divisors of the characteristic polynomial, it classifies invariant components into types according to recipr…
The paper studies complete rational trigonometric sums modulo a prime for sparse polynomials such as \(Ax^n+Bx\) and \(ax^n+bx^k\), in ranges where Weil’s general bound may become trivial. Using invariance under multiplication by roots of unity modulo \(p\), together with Cauchy’s inequality and kno…
This paper examines whether the reported observation of the CP-forbidden decay K2 neutral to pi plus pi minus could be imitated by other two-particle decays, given that the original experiment did not identify either the neutral parent or the charged decay products. Using invariant kinematic relatio…
This paper examines the stress dependence of the order to disorder transition in collagen fibers swollen in water, treating hydrothermal contraction as a phase transition in a one dimensionally ordered fibrillar protein. From thermomechanical and isometric heating measurements, the authors construct…
The paper studies plane potential motions of a polytropic gas whose streamlines are stationary, treating the stationarity condition as an additional constraint on the unsteady gas-dynamic equations. By introducing velocity magnitude and direction and then using orthogonal curvilinear coordinates ada…
This study examines how the durability of modified alkyd polymer coatings depends on formation temperature and subsequent aging conditions. Coatings formed on glass and metal at 20 to 180°C were aged under heat, ultraviolet irradiation, moisture, atmospheric exposure, and accelerated GIPI-4 tropical…
This paper examines the use of zeolites to reduce hydrocarbon contamination in electron microscopes, a major factor limiting high resolution imaging under an electron beam. The authors introduced NaX zeolite granules either in a side arm connected near the object chamber or directly near the specime…
This paper examines the determination of polymer cohesive energy densities from critical opalescence measurements in polymer solutions, using Debye’s relation between the mean radius of action of intermolecular forces, coil dimensions, and solvent and polymer interaction parameters. The authors deri…
This paper examines the use of liquid electrophotographic developers to reveal and study reverse-biased silicon p-n junctions, focusing on the space-charge region in lithium-diffused p-type silicon. Starting from the depleted-junction approximation, the authors derive relations connecting the moveme…
This paper studies decision problems for the nth nilpotent product of groups, extending known results for direct and free products. It proves that the embedding problem is undecidable in the nth nilpotent product of two free groups of rank two, while a weak embedding problem is decidable under hypot…
This paper studies sets in metric spaces that are effectively different from all sets generated by a given delta-s operation, using Novikov’s notion of effective difference. For operations satisfying a chain condition, it proves that such a set contains, inside a perfect compact subset, an absolute …
The paper introduces an averaged symmetric-difference quantity, called the L-modulus of smoothness, and applies it to estimates of Fourier coefficients of periodic functions. Using Parseval’s equality and related arguments, it derives bounds for weighted sums and individual Fourier coefficients in t…
This paper examines electron mobility and Hall-effect behavior in single-crystal HgTe, where the interpretation of conductivity type is complicated by the large ratio of electron to hole mobility and the broad transition from impurity to intrinsic conductivity. Measurements of Hall coefficient, elec…
