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 addresses how data from an abandoned deviated borehole and its replacement borehole can be used to determine the attitude of a geological bed without additional field expense. It develops a graphical procedure using borehole curvature elements, depth correlations of stratum intersections, …
This study examines the distribution and morphology of accessory zircon in Permian porphyritic granites of the Mokhnatukhinsky massif in Rudny Altai. Samples collected along geochemical profiles from the central and endocontact parts of the intrusion were analyzed for rock-forming minerals and zirco…
This paper examines rhythmic fluctuations in the groundwater regime of the Yerunakovsky coal district of Kuzbass, with attention to their significance for forecasting mine water inflows and assessing water supply conditions. Using 7 to 10 years of borehole observations on groundwater levels and flow…
This paper presents new 1964 field data on Precambrian stratigraphy in the watershed between the Mrassu and Lebed river systems in the southwestern Kuznetsk Alatau. It distinguishes two conformable Upper Proterozoic units: the Kaurchak suite, composed of metamorphosed terrigenous and volcanogenic ro…
This paper reports reconnaissance measurements of magnetic properties and remanent magnetization in rocks of the Baley graben, a representative structure of the Undino-Dainskaya depression in Eastern Transbaikalia. Based on 500 specimens measured with an astatic magnetometer, the authors compare mag…
This paper examines the identification of normal cross-cutting fracture systems in folded sedimentary rocks, focusing on coal and rock observations from the Kuzbass. The authors argue that comparison in conventional reduced-bed coordinates can wrongly equate distinct fracture systems, because fractu…
The paper provides an analytical basis for determining the attitude of uniformly bedded rock strata from unoriented drill cores taken in differently oriented borehole intervals. It formulates the problem using the known orientations of borehole axes and measured apparent dip angles in cores, express…
This paper examines the petrography and internal structure of the Mustag pluton in Gornaya Shoria, a granitoid body previously described only fragmentarily in the geological literature. On the basis of field relations and microscopic mineralogical observations, it distinguishes three heterochronous …
This paper examines the origin of pisolitic structure in bauxite-bearing clays from the Kozyrevka mine in Western Kazakhstan, addressing whether pisolites form through redeposition or through physicochemical redistribution during diagenesis. Based on field observations of gradual transitions from fe…
This paper describes gibbsite-bearing segregations and small oolitic bodies identified in Cretaceous siltstones and silty argillites of the central Berezovka trough in the Kansk-Achinsk coal basin. Petrographic observations from boreholes show oolites composed of gibbsite and iron hydroxides, with r…
This paper describes the Devonian Tilekovsky intrusive complex identified in the Nenya-Bazinsk district on the eastern slope of the Kuznetsk Alatau. Using petrographic observations and chemical analyses recalculated by A. N. Zavaritskii’s method, the study characterizes a sequence from wehrlites thr…
The paper proves that a perfect image of a paracompact feathered, or p, space is again a paracompact feathered space, resolving a problem posed by Arhangel’skii. The argument combines Michael’s preservation theorem for paracompactness under closed maps with a construction of suitable locally finite …
A procedure is described for determining trace impurities in high-purity silver at levels of about 10^-5 to 10^-6 percent, addressing the limited sensitivity and reproducibility of existing spectral methods for some elements. The method uses amalgam polarography with accumulation after dissolution o…
The study examines the amalgam polarographic behavior of pentavalent antimony in hydrochloric acid media in order to determine trace antimony in gallium arsenide without separating the gallium and arsenic matrix. Using a mercury drop electrode, the authors evaluated hydrochloric acid concentration, …
This paper develops amalgam polarographic procedures with accumulation for determining trace copper in calcium biphosphate and high-purity calcium carbonate used in phosphor production, where allowable copper levels are extremely low. For calcium biphosphate, copper is accumulated from hydrochloric …
The paper develops amalgam polarographic procedures with accumulation for determining trace copper impurities in high purity antimony trioxide and demineralized water used in phosphor production. It examines removal of antimony by distillation as antimony chloride, choice of supporting electrolyte, …
This paper examines sources of error in determining trace impurities in high-purity materials by amalgam polarography with accumulation, emphasizing contamination and analyte loss during sampling, evaporation, vessel washing, storage, and measurement. The authors discuss practical precautions and de…
This paper investigates extraction anodic stripping voltammetry for determining ultramicroimpurities directly in a chloroform solution of dithizone mixed with ammonium nitrate in methanol, avoiding re-extraction steps. The authors study the conductivity of the nonaqueous medium and the anodic respon…
This paper reviews the development of polarographic methods that determine trace elements directly in organic extractants, avoiding re-extraction, complex destruction, and related losses. It discusses classical polarography in homogeneous extractant systems and emphasizes extraction amalgam strippin…
This study determines standard polarographic coefficients for elements analyzed by amalgam polarography with accumulation in several commonly used supporting electrolytes. Using previously defined coefficients for stirring, electrolysis, sensitivity, peak shape, attenuation, and concentration, the a…
This paper examines the amalgam polarographic behavior of antimony in hydrochloric acid media, with emphasis on coefficients relevant to anodic stripping determination. The authors calculate standard polarographic coefficients for antimony in 1 N, 3 N, and 6 N hydrochloric acid and find that the sen…
The study examines cathodic and anodic polarization of uranyl sulfate in sulfuric acid media on a stationary mercury drop electrode over varying supporting electrolyte concentrations and current densities. Polarographic waves are interpreted in terms of stepwise uranium redox transitions, with chang…
This paper reviews electrochemical methods for identifying the composition of metal complexes directly involved in irreversible and quasi-reversible electrode processes, distinguishing them from complexes predominating in bulk solution. It summarizes theoretical relations linking ligand concentratio…
This paper proposes using the electrolysis constant in amalgam polarography with accumulation as a diagnostic measure for adsorption, desorption, hydrolysis, or related changes in ion concentration in very dilute solutions. It develops several ways to establish a standard constant, including use of …
This article reviews and systematizes coulometric measurements in the APN method, especially for anodic dissolution of metals from stationary mercury amalgam drops. It describes a practical procedure in which the potential scan is stopped after the anodic peak reaches the limiting-current region, al…
This study examines the origin of double anodic peaks observed for gallium in amalgam polarography with accumulation, a phenomenon that can complicate trace analysis. Using stationary mercury electrodes in several supporting electrolytes at pH 3 to 5, the authors test whether the peaks arise from st…
This study examines the formation of intermetallic compounds of antimony with gold and nickel in mercury, a process relevant to trace polarographic analysis and amalgam metallurgy. Using amalgam polarography with accumulation on a stationary mercury electrode, the authors measured the disappearance …
This paper develops theoretical graphical procedures for determining the phase composition of amalgams containing binary intermetallic compounds in mercury when only one of the two metals produces an anodic notch in the APN method. It derives diagnostic linear relationships for cases where the compo…
This article develops a theoretical treatment for using anodic stripping polarography to study intermetallic compounds formed by two metals in mercury. It examines how the depths of anodic peaks depend on preliminary electrolysis time and derives diagnostic curve forms for sparingly soluble, insolub…
This paper develops a theoretical basis for using amalgam polarography with accumulation to study intermetallic compounds formed by two metals in mercury. It derives relationships between anodic peak depths and the equilibrium concentrations of the metals under two alternative assumptions, that the …
This paper addresses peak overlap in multicomponent amalgam stripping polarography with accumulation, a problem that increases analytical error when anodic peak potentials are close. It describes an electronic resolving attachment for an OH-101 polarograph that detects the sign change of the current…
This paper addresses errors introduced in electrochemical calculations when a pendant mercury drop electrode is approximated as a sphere or spherical segment despite gravitational deformation. Using previously computed numerical solutions of the Laplace equation, the authors compile interpolation ta…
This study examines factors affecting the ammonium amalgam effect in amalgam polarography with accumulation, where formation and decomposition of ammonium amalgam enlarge the mercury electrode surface and increase analytical sensitivity. Using lead and thallium as test ions, the authors experimental…
This paper examines ways to increase the resolving power of amalgam polarography with accumulation, focusing on separation of overlapping anodic peaks and suppression of matrix interferences. It reviews the use of complexing backgrounds, accumulation potential selection, electrode geometry, scan-rat…
The study examines how stirring conditions affect the electrolysis constant used to characterize mass transport to a hanging mercury drop electrode in anodic stripping analysis. Using bismuth in hydrochloric acid as a test system, the authors calculate the constant from anodic peak areas while varyi…
This study examines how operating and geometric parameters of a circulation electrolyzer affect the effective electrolysis constant in amalgam polarography with accumulation. Using bismuth(III) in 0.25 N hydrochloric acid as a test system, the authors varied piston stroke frequency and amplitude, ca…
This paper systematizes procedures for calculating the electrolysis constant in amalgam polarography with accumulation, a parameter identified as important for increasing analytical sensitivity. It compares calculations based on electrolysis current, passed charge, and anodic wave area under conditi…
This paper reviews theoretical and practical approaches to increasing the sensitivity of amalgam polarography with accumulation for trace impurity determination in high-purity materials. It analyzes how anodic peak height depends on electrolysis time, solution volume, electrode size, depletion degre…
This paper compares two theoretical approaches for estimating the sensitivity of amalgam polarography with accumulation, one based on practically complete depletion of the solution and the other on the mercury drop radius that maximizes the anodic peak. By deriving and transforming the relevant expr…
This paper examines ways to increase the sensitivity of amalgam polarography with accumulation using a film amalgamated electrode. The authors derive relationships for the minimum determinable impurity content, optimal solution volume, electrode surface, and amount of deposited substance, and use th…
This paper analyzes the resolving power of polarography with linearly varying potential when neighboring cathodic or anodic peaks overlap and hinder quantitative impurity determination. Using an additive peak-current assumption, the author derives expressions for the relative error in measuring a di…
This paper develops a theoretical treatment of resolving power in amalgam polarography with accumulation on a stationary mercury drop under a linearly varying potential. Using the parametric theory of the method, the authors define resolving power as the allowable ratio of interfering to determined …
This paper develops a theoretical treatment of anodic amalgam voltammetry at a spherical mercury electrode when the electrode oxidation is followed by a first-order chemical reaction, reversible or irreversible. Using Fick’s second law with spherical diffusion and Laplace-transform methods, the auth…
This paper develops a theoretical treatment of anodic amalgam voltammetry at a spherical mercury electrode when electro-dissolution of an amalgam is preceded by first-order dissociation of a soluble intermetallic compound. The authors solve coupled diffusion and kinetic equations, using Laplace tran…
This paper develops a theoretical treatment of anodic amalgam voltammetry for mercury film and spherical electrodes under prescribed electrode current or potential. Using Laplace transform methods, the authors solve Fick’s second law for restricted diffusion in the amalgam and derive concentration d…
This paper develops a theoretical description of the ammonium amalgam effect as a means of increasing sensitivity in amalgam polarography with accumulation. The authors model the growth of a mercury drop during electrolysis of an ammonium salt solution as a balance between ammonium ion discharge and…
This paper experimentally tests competing theories for the anodic peak in amalgam accumulation polarography using a mercury film electrode under reversible electrode conditions. The authors derive expressions for the anodic half-peak width from Igolinsky’s low-scan-rate approximation and compare the…
This paper derives equations for the descending branch of the anodic peak in anodic amalgam voltammetry on a film mercury electrode under a linearly varying potential, extending earlier treatment beyond low potential sweep rates. The authors formulate the problem as nonstationary linear diffusion in…
This study tests the limiting equation for an irreversible anodic peak at a stationary mercury film electrode using the anodic dissolution of zinc from zinc amalgam in ammoniacal solutions. The authors measured how peak potential varies with the rate of potential change, mercury film thickness, and …
