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 discusses the use of analog computers for accelerator engineering calculations involving charged-particle trajectories in nonlinear, time-dependent electromagnetic fields. It presents modeling and programming features through examples including electron motion in a microtron, extraction o…
This paper examines the calculation of charged-particle trajectories in the central region of a cyclotron as a means of improving the energy monochromaticity of extracted ion beams. It formulates the ion motion in and outside the accelerating gap as systems of differential equations and describes th…
The study examines whether quadrupole magnetic fields can focus high-current electron beams when space-charge repulsion must be included. Beam-envelope equations for parallel beams were solved on analog computers for systems made from straight current-carrying quadrupole conductors and for a helical…
This paper examines photometric determination of trace titanium in high-purity iron using diantipyrylmethane, addressing interference from ferric iron coloration and complex formation. Three analytical variants are developed and compared: extraction-based preliminary separation of iron, direct deter…
This study examines the sorption of titanium on the KU-2 cation exchanger in aqueous and aqueous alcohol media in order to enable trace determination where organic solvent is present. Distribution coefficients were measured under static and dynamic conditions at different hydrochloric acid concentra…
A photometric procedure is described for determining trace aluminum in high-purity iron using xylenol orange, selected for its high sensitivity in aluminum complex formation. The method dissolves the iron sample in hydrochloric acid, oxidizes and extracts iron as chloride complexes with diethyl ethe…
This paper addresses the analytical determination of free ammonia, ammonium carbonate, and total ammonium content in industrial solutions containing ammonium hydroxide, ammonium carbonate, ammonium nitrite, and ammonium nitrate, where conventional titrimetric methods are hindered by indicator instab…
This paper addresses the quantitative determination of tellurium and the difficulty of separating tellurium from selenium in conventional gravimetric and volumetric procedures. It compares the reducing action of several organic compounds on tellurite and selenite ions in alkaline solution, followed …
This paper examines how variations in heat exchanger load affect the coefficients in a dynamic model whose parameters depend on the heat transfer coefficient and flow velocity. Using a coil heat exchanger as an example, the authors compare time characteristics calculated for several flow rates in bo…
This study examines clinker formation in cement raw mixes using nepheline sludge from the Uzhur deposit as the clay component. Limestone and sludge mixtures with saturation coefficients from 0.64 to 0.95 were fired with two-hour holds, and the products were analyzed for loss on ignition, free calciu…
This study examines whether products formed by the reaction of zircon concentrate with calcium carbonate can be used as crystalline components in capacitor ceramics. Using thermodynamic calculations, high-temperature X-ray analysis, chemical kinetic treatment, and microscopy, the authors analyze pha…
This study examines the ordering kinetics of protoenstatite, the magnesium metasilicate phase formed during thermal decomposition of talc, because structural defects in this phase influence dielectric losses in steatite ceramics. Pressed samples from two talc deposits were fired between 1200 and 138…
This paper examines how colloidal components in Tomsk Region loams affect properties important for red construction brick production. Colloids were removed from loam samples either chemically, using 0.5 N hydrochloric acid, or physically, by repeated decantation of fine clay suspensions, and the tre…
This paper examines overfiring in barium steatite ceramic products, a defect that narrows the firing interval and causes swelling, pore expansion, reduced density, and deterioration of mechanical and electrical properties. The authors analyze possible sources of gas formation during firing and argue…
This paper examines how calcium impurities affect steatite ceramics, with particular attention to the stability of magnesium metasilicate phases that influence aging of dielectric products. Talc specimens and steatite bodies with varying calcium oxide contents were fired and analyzed by X-ray diffra…
This study examines how crystal size affects polymorphic transformations of magnesium metasilicate relevant to the aging of steatite ceramics. Clinoenstatite fractions of different particle sizes were synthesized, dispersed, and analyzed by differential thermal analysis and high-temperature X-ray ph…
This study examines polyacrylonitrile as a flocculating additive for improving the filtration properties of asbestos-cement suspensions used in product forming. Using Portland cement and an industrial asbestos mixture, the authors compare polyacrylonitrile with polyacrylamide through tests of cement…
This study addresses the need for preliminary oil removal from wastewater at the Kemerovo Coke-Chemical Plant before biological phenol treatment, especially in view of planned dry coke quenching and discharge requirements. Laboratory flotation experiments were conducted on wastewater containing abou…
This study evaluates a lignin-based sorbent for removing phenols and oils from wastewater from the Kemerovo Coke-Chemical Plant, addressing the lack of inexpensive sorbents capable of simultaneously extracting dissolved organic contaminants over varied conditions. Static experiments examined sorbent…
This paper investigates methods for decomposing spent oil in water emulsions used in copper wire drawing, with the aim of recovering oil and copper from waste streams. The authors compare demulsifier ANP, copper sulfate, alkali treatment, and sulfuric acid, examining their effects on separation of c…
This paper describes an experimental apparatus for investigating heat transfer between a heated surface and a dispersed granular layer under conditions including a “loosened” state produced by pulsating air flow. Because the transparent organic glass chamber could not serve as a heated wall, the aut…
This study examines how the regime and motion of a fluidizing air flow affect heat transfer between a heated surface and a granular sand bed. Experiments compared steady blowing with sinusoidally pulsating flow at several frequencies, measuring bed hydrodynamics, compaction and expansion behavior, a…
This study examines how humic acids and insoluble calcium, iron, and aluminum humates affect the agglomeration, compaction, and strength of marshallite granules. Humic substances prepared from peat were mixed directly with the material before granulation on a laboratory pan granulator, and the densi…
This paper examines the pelletizing of ferruginous sludge waste from aniline production at the Kemerovo Aniline-Dye Plant, a highly dispersed magnetite-rich material unsuitable for direct use in layered metallurgical processes because of poor gas permeability. The authors characterize the sludge com…
This paper examines why standard moisture-capacity methods can give erroneous agglomerability indices for disperse materials containing substantial water-soluble components. Using a high-boron glass batch as an example, the authors compare conventional thermal drying with low-temperature isothermal …
This paper evaluates the granulation behavior of a newly synthesized concentrated phosphate fertilizer composed mainly of calcium, magnesium, iron, and aluminum metaphosphates with calcium pyrophosphate. Using moisture capacity measurements, the authors calculate a lump-forming index of 0.9 and an o…
This paper examines the replacement of conventional extrusion-based forming of catalyst supports with wet granulation on an inclined pan granulator, followed by drying and calcination in fluidized-bed reactors. Using alumina-based GIAP-3 and zinc oxide-based 481-Zn supports, the authors determine mo…
This paper addresses limitations in conventional electrofused corundum production for rough grinding wheels, including high energy use, batch operation, raw material sensitivity, dust losses, and weakening of grains during crushing. It proposes a calibrated abrasive grain technology based on wet gri…
This paper examines the use of chromium ion microadditives to improve the granulometric composition and crystal habit of ammonium sulfate produced from coke-chemical saturator liquors. Laboratory crystallization experiments with pure ammonium sulfate and with liquors from the Kemerovo Coke-Chemical …
This study examines whether preliminary vibration treatment can improve preparation of fine iron ore concentrates for sintering by enhancing pelletizing and bed permeability. Laboratory cup sintering tests compared conventional drum pelletizing with a sequence in which moistened charge mixtures rece…
This study addresses nonuniformity and chromium oxide segregation in the conventional arc furnace production of chrome fused alumina from alumina and chromium oxide powders. The authors investigate whether preliminary heat treatment of a charge containing 98.5% alumina and 1.5% chromium oxide can in…
This study examines whether magnetic treatment can alter the aggregate-forming properties of moist dispersed materials by changing the state of water associated with their particles. Kaolin, limestone, iron-ore concentrate, alumina, and coal slurry were exposed to a permanent magnetic field while dr…
This study examines how the surfactants camphor and n-amyl alcohol influence the kinetics of zinc discharge and ionization in sulfate electrolytes, a problem relevant to improving electrodeposited zinc coatings. Polarographic and voltammetric measurements were carried out on dropping and stationary …
This study examines how the molecular surfactants n-amyl alcohol and camphor influence the kinetics of copper discharge and ionization in sulfate electrolyte. Using polarography with linearly varying potential on dropping mercury, stationary mercury drop, and solid copper electrodes, the authors mea…
This study addresses the selection of supporting electrolytes for amalgam accumulation polarographic determination of trace amounts of Zn, Cd, Pb, Cu, Bi, Sb, Sn, In, and Tl. Using a silver film electrode with a mercury film under standardized electrolysis, purging, stirring, and recording condition…
This paper develops amalgam polarographic procedures with accumulation for determining trace impurities in semiconductor-grade zinc sulfide and cadmium sulfide. Using a 1 N hydrochloric acid background, the authors study the dependence of anodic peak currents on electrolysis potential, accumulation …
This paper proposes an alternating-current polarographic method for determining surface-active organic microimpurities in water without preliminary concentration. The approach uses changes in the cathodic cadmium peak at a stationary mercury-film electrode, with tetrabutylammonium bromide as a refer…
This paper examines the use of amalgam and film stripping polarography to determine very low concentrations of organic compounds that form sparingly soluble salts or complexes with metals at an electrode surface. The authors propose expanding earlier mercury electrode approaches by first concentrati…
This study examines the extension of amalgam polarographic analysis to solutions simulating biological materials and food industry objects for trace determination of inorganic impurities. Using a film cathode, saturated calomel reference electrode, nitrogen deaeration, controlled acidity, and select…
This study compares acid chloride forming agents for the acylation of benzhydrylurea with propionic acid, a reaction relevant to the preparation of acylated ureas with potential anticonvulsant activity. Benzhydrylurea was reacted under identical conditions in benzene with propionic acid in the prese…
Infrared absorption spectra were recorded and systematized for 24 monosubstituted urea derivatives of the general type RNHCONH2 in Vaseline oil and in benzene and chloroform solutions. The study compares alkyl, arylalkyl, and diarylalkyl substituent classes with urea, assigning characteristic NH, NH…
The paper examines the structural assignment of diacyl derivatives formed by acylation of benzylurea with para substituted benzoic acids, focusing on which amide nitrogen receives the second acyl group. Infrared spectra were found to be insufficiently diagnostic, so the study interprets proton magne…
This study describes the synthesis and preliminary pharmacological evaluation of substituted benzalbisureas and 1-alpha-ureidobenzyl-2-naphthols in a search for anticonvulsant agents. Benzalbisureas were prepared by acid-catalyzed condensation of substituted benzaldehydes with urea, and selected pro…
This study examines whether introducing a urea fragment into amino acids associated with anticonvulsant activity preserves or modifies their biological effect. Seven ureido acids were synthesized from corresponding amino acids by reaction either with urea or with sodium cyanate, and the products wer…
This paper describes an apparatus for studying the kinetics of fast reversible reactions in solution using the field dissociation effect produced by a rectangular high-voltage pulse. The design adapts relaxation-method instrumentation for measuring protonation constants of carboxylic acids, with a s…
This study examines the dipole moments of a homologous series of monoacetyl derivatives of 9-alkylcarbazoles and evaluates the electronic state and polarity of their carbonyl bonds. Dipole moments were calculated from concentration dependences of dielectric constants and specific volumes in benzene …
This study examines how anthracene and phenanthrene impurities in carbazole affect the revinylation synthesis of 9-vinylcarbazole oligomers and their electrophotographic properties. Oligomers were prepared from synthetic carbazole with added anthracene, from reagent-grade carbazole, from recrystalli…
This study examines the kinetics of direct iodination of fluorene-5-carboxylic acid using iodine in the presence of a sulfuric and nitric acid mixture, a method proposed for preparing otherwise difficult aromatic iodo derivatives. Reaction progress was followed by sampling, quenching with water, ext…
This paper proposes a simplified differential method for estimating the activation energy of thermal decomposition of solids from derivative thermogravimetric curves. Starting from the standard rate law with Arrhenius temperature dependence under constant heating, the authors derive an expression us…
This study examines how hematite additions affect the thermal decomposition of peat, a question relevant to possible chemical and metallurgical uses of peat. Peat samples containing varying amounts of iron oxide were semicoked in nitrogen on a derivatograph to 600°C, while weight loss and the evolut…
