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 examines the use of magnetic surveying to study the structure of a complex gold ore field in the Mariinskaya Taiga, where quartz veins, dikes, faults, and variable loose cover produce overlapping magnetic anomalies. Based on surveys at several scales, profile measurements, micromagnetic w…
This paper examines whether micromagnetic surveying can be used to investigate fracture systems and disjunctive tectonics at a gold quartz vein deposit in granodiorite in the Mariinsk Taiga. Using dense magnetic observations on small plots, trench comparisons, isoline analysis, and statistical rose …
This paper evaluates the significance of the Malokheta-Turukhan deep fault for possible oil and gas accumulation in the northeastern West Siberian Lowland. Using gravity and magnetic anomalies, drilling data, seismic evidence, and comparisons with mapped uplifts and swells, it argues that the fault …
This paper examines calcareous algae, chiefly species of Epiphyton, from the Anastasyino and Ungut formations in the northwestern Eastern Sayan, with attention to their stratigraphic distribution and taxonomic characterization. On the basis of thin section study, the author distinguishes three preli…
This preliminary study reexamines the Paleozoic stratigraphy of the Chumai area in the northern Kuznetsk Alatau, where volcanogenic and terrigenous rocks had commonly been assigned to the Devonian. Detailed field mapping, tracing of marker horizons, and collection of archaeocyaths, algae, trilobites…
This study examines the ozonolysis of low-percentage technical phenanthrene from coal-tar anthracene fractions as a practical alternative to the use of pure phenanthrene for producing dimethoxy peroxide, an intermediate for phenanthrene oxidation products. Various technical phenanthrene samples were…
A series of alkyl esters of 2′-formyldiphenyl-2-carboxylic acid was synthesized by esterifying the parent acid with the corresponding alcohols and evaluated for fungicidal activity. Tests at a 0.05 active-principle concentration against Botrytis cinerea, Fusicladium dendriticum, and Fusarium oxyspor…
This study examines whether the anticonvulsant activity of N-acyl derivatives of N′-benzylurea is related to their hydrolytic stability, following the premise that such compounds may undergo hydrolytic cleavage in vivo. Seven N,N′-acylbenzylurea derivatives were hydrolyzed in aqueous alcoholic media…
This study examines whether the physiological activity of acyl derivatives of 4-methylaminoantipyrine is related to their hydrolytic cleavage, which liberates 4-methylaminoantipyrine and a carboxylic acid. Eleven derivatives were prepared and their hydrolysis rates were measured at 99 degrees C in 0…
This study examines improved conditions for acylating 4-alkylaminoantipyrines, compounds of interest because some acyl derivatives show anti-inflammatory and antipyretic activity. Using the formation of 4-(4′-nitrobenzoyl)-methylaminoantipyrine from 4-methylaminoantipyrine and p-nitrobenzoyl chlorid…
This paper develops synthetic procedures for 3,5-dinitrobenzoic acid antipyrilamide, a previously undescribed compound reported by the authors to show anti-inflammatory and antipyretic activity with low toxicity in pharmacological testing. It compares acylation of 4-aminoantipyrine with free 3,5-din…
This paper examines why cobalt oxide catalysts prepared by precipitation with potassium hydroxide show high activity in the oxidation of ammonia to nitric oxide. Using X-ray diffraction and spectral analysis, the authors find that the catalysts retain a predominantly cobaltous-cobaltic oxide spinel …
This study examines blistering in barium carbonate containing steatite ceramics during firing, focusing on whether unassimilated barium carbonate can generate gas and defects in the fired product. Using gravithermometric measurements on torsion balances, the authors compare the interaction of barium…
This study examines how the cooling rate after firing affects the technological properties of a steatite ceramic body. A standard steatite composition was fired at 1320°C and then cooled in three ways: with the furnace, in air, and in water, after which the resulting bodies were ground, formed with …
This study evaluates steatite electroporcelain bodies based on low-iron Alguy talc for electrical insulating applications, focusing on how feldspar and nepheline fluxes affect firing behavior, strength, and dielectric properties. Eleven experimental compositions using natural or beneficiated talc, C…
This paper evaluates powdery talcites from the Alguy deposit as a potential source of low-iron talc for industrial use. Ten representative samples were examined by grain-size, chemical, microscopic, X-ray, thermal, and ceramic tests, with comparison to Onot talc and with attention to beneficiation b…
This paper addresses the determination of liquid surface tension from the equilibrium shapes of axisymmetric sessile drops or bubbles, particularly for viscous liquids where contactless methods are useful. It argues that, despite earlier recommendations to use large drops, small drops may avoid expe…
The study examines the thermal decomposition of silver sulfite at 100 to 150°C, extending earlier work conducted above 150°C, and compares the decomposition behavior with temperature dependent electrical conductivity from 20 to 200°C. Using high vacuum volumetric measurements of gas pressure and con…
This study examines whether an applied electric field can alter the thermal decomposition rates of silver oxalate, lead azide, and silver azide, a question linked to identifying the rate limiting stages in solid decomposition. Using a vacuum volumetric method with an asymmetric electrode arrangement…
This paper examines how homophase and heterophase additives regulate the thermal decomposition of several inorganic azides, with emphasis on silver, lead, barium, and copper azides. Using conductivity observations, prior kinetic data, and experiments with metal ions and oxide or sulfide additives cl…
This paper examines the use of amalgam polarography with accumulation to determine the solubility of gallium and germanium in mercury, a parameter important for amalgam metallurgy and trace analysis. The authors measure anodic peak currents after electrolytic accumulation under controlled deoxygenat…
This study applies amalgam polarography with preconcentration to examine intermetallic compound formation between gallium and gold, cobalt, and nickel in mercury. Using acetate buffer and stationary mercury-drop electrolysis, the composition was inferred from the disappearance of gallium anodic peak…
This paper examines the direct determination of trace metal impurities in a nonaqueous oxyquinoline extractant by extraction amalgam polarography with accumulation, avoiding re-extraction and associated sample treatment. The authors study anodic waves of lead, thallium, copper, indium, and cadmium i…
This study examines the production of anodic uranium peaks by amalgam stripping polarography after preliminary electrolysis at high cathodic current density in acidic supporting electrolyte. Using an extruded mercury drop and a mercury film electrode, the authors evaluate how hydrogen evolution curr…
This paper proves an existence theorem for asymptotic geodesics on compact oriented two-dimensional Riemannian manifolds not homeomorphic to the sphere. For any point and any free homotopy class of closed curves, the argument uses the universal covering surface, properties of minimal arcs, and monot…
This paper examines how residual flux densities in current transformer cores affect transient unbalance currents and the balancing of differential protection arms during external short circuits. Using graphical transient calculations and experimental tests on differential current transformer circuit…
This paper examines the use of X-ray radiography for nondestructive control of macrostructural defects in polymeric electrical insulating materials, where cracks, voids, and inclusions can reduce dielectric strength. The authors evaluate how irradiation, radiation energy, field restriction, film uns…
This paper examines the use of betatron bremsstrahlung radiation for flaw detection in thick polymer electrical insulating materials, where conventional isotope and X-ray radiography are limited by insufficient penetration. The authors investigate irradiation effects on Teflon, polyethylene, and pol…
This paper analyzes how parasitic capacitances affect circuits used to measure pulsed currents in solid dielectrics, especially when voltage pulses have very short fronts. It derives expressions for the output current in two compensation circuits, shows their reduction to a common equivalent form un…
This paper describes a nonresonant parametric converter intended to transform the duration, spectrum, and energy of pulse signals using parametrically coupled artificial transmission lines. The proposed arrangement employs an exciting pulse that propagates faster than the pulse being converted and p…
The paper examines whether a nomogram developed for estimating the dielectric permittivity of mixtures can also be used, by electrostatic analogy, to estimate the specific conductivity of mixtures of two dielectrics. Transformer oil and powdered Kamensk limestone were tested at several volume fracti…
This paper investigates how elevated hydrostatic pressure affects pulsed electrical breakdown and fracture in nonconducting solids, with emphasis on rocks relevant to deep subsurface conditions. Experiments were conducted in transformer oil at pressures up to 150 kg/cm² using short high-voltage puls…
This paper examines the impulse breakdown behavior of IK-2 cable with polyethylene insulation, addressing the limited data then available on permissible long-term impulse voltages. The authors built a 150 kV impulse-voltage generator and tested multiple 10.6 m cable specimens under negative rectangu…
This paper reports experimental measurements of pulsed breakdown in aqueous sodium chloride solutions under microsecond and nanosecond voltage exposures in a nonuniform rod to plane electric field. Using a four stage impulse generator, the authors obtained volt second characteristics for solution re…
This paper investigates the barrier effect in solid dielectrics, namely the increase in breakdown voltage caused by inserting thin high-strength layers into insulating specimens. Experiments on glass, rock salt, celluloid, and paper-oil insulation under direct, alternating, and impulse voltages meas…
This paper investigates the barrier effect in solid dielectrics, extending a phenomenon known from air and liquid insulation to glass, rock salt, celluloid, and paper-oil systems. Using point-plane electrodes, the authors measured breakdown voltages under direct, alternating, and impulse voltages wh…
The paper addresses estimation of the maximum power developed in the channel of a pulsed electric discharge, a parameter linked to shock wave pressure and the destructive action of breakdown in dielectric media. Treating the post-breakdown circuit as an RLC discharge, the authors derive expressions …
This paper describes an apparatus designed to study ignition and explosion of gas or vapor mixtures by electrical sparks, with attention to determining the minimum discharge energy and the influence of capacitance, voltage, pulse duration, pulse number, and repetition frequency. It compares synchron…
The paper addresses the reproduction of switching-duration overvoltages for high-voltage insulation testing using existing impulse-voltage generators. It argues that aperiodic impulses with long oblique fronts can adequately simulate many switching effects, but shows experimentally and by circuit an…
This paper examines mechanical failures of standard RVS-220 valve-type surge arrester installations in grounded-neutral networks, attributed to insufficient porcelain strength and cracking near flange reinforcements. It presents several reconstructed installation schemes intended to improve stabilit…
The paper develops a calculation method for generator protection against external and internal phase-to-phase short circuits using differential current transformers with two separate secondary windings. It formulates equivalent-circuit equations for relay and magnetizing currents, then introduces si…
This paper examines combined generator protection against external and internal phase-to-phase short circuits using differential current transformers with separate relay circuits for overcurrent and internal-fault protection. It develops equivalent circuits and calculation formulas for secondary, ma…
This paper reports computed design relationships for choosing optimal geometric parameters of open-type smoothing chokes using strip, nonstandardized cores. Building on earlier derivations, it minimizes technical and economic objective functions for several design cases, including specified voltage …
This paper investigates the geometry of standardized tape-wound magnetic cores for smoothing chokes, extending earlier work to multiple technical and economic criteria and to two design cases: specified voltage drop and specified overheating. Using an approximation criterion and computer search over…
The paper develops a techno-economic method for determining optimal dimensions of medium-power 110 kV three-phase two-winding transformers while treating winding coil filling factors as variables dependent on conductor and insulation geometry. It formulates the governing electrical, thermal, and mec…
This paper examines attenuation and waveform distortion of high-voltage aperiodic pulses transmitted through coaxial cable systems over long distances. It first analyzes the proposed condition for distortionless transmission, deriving current-density distributions in the conductors for exponential p…
The paper examines whether powerful high-voltage pulses can be transmitted over kilometer-scale distances with acceptable attenuation and limited waveform distortion in a coaxial transmission system. It refines earlier distortionless-line calculations by including skin effect, frequency-dependent in…
