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 evaluates cyanoformazan-2, chlorocyanoformazan, and arsonocyanoformazan as organic photometric reagents for determining trace aluminum in high-purity materials. Using spectrophotometric measurements, the authors characterize pH dependence, complex composition, absorption maxima, molar abso…
This paper examines how temperature affects tar yield during pyrolysis of solid fuels, a relationship considered insufficiently established because the mechanism of tar formation is not fully clarified. The authors propose a simplified kinetic scheme in which solid combustible material forms tar, wh…
This study applies the temperature-kinetic method to clarify the rate-limiting character of cadmium and antimony ion reduction in amalgam accumulation polarography using 0.2 N ammonium nitrate in ethanol as the supporting electrolyte. Experiments measured anodic peak currents after preliminary elect…
This paper examines mixed potential and mixed exchange current as they relate to metal cementation on amalgams, using polarography to interpret a nonequilibrium system consisting of zinc amalgam, zinc ions, and bismuth ions in perchloric acid solution. It describes experiments with an amalgam droppi…
A procedure is presented for the extraction-photometric determination of trace arsenic, phosphorus, and silicon in high-purity iron from a single weighed sample. The method separates arsenic as arsenic(III) chloride by benzene extraction, phosphorus as a molybdenum heteropoly complex by ether extrac…
Telomerization of 9-vinylcarbazole in carbon tetrachloride was investigated at 75°C using benzoyl peroxide as a radical initiator, with attention to conditions relevant to forming polyvinylcarbazole-related materials. The study measured monomer conversion, yields of precipitated high-molecular-weigh…
This paper examines the alkaline oxymethylation of phenol with formaldehyde and evaluates a proposed reaction mechanism by comparing experimental kinetic data with analog computer modeling. Assuming mass action kinetics, the authors formulate a system of differential equations for phenol, formaldehy…
The paper addresses the difficulty of using standard redox and pH theory to predict trace element contents in natural waters, where elements may occur in multiple ionic and complex forms. Using hydrogeochemical data from the northeastern Salair region, it proposes a multiple linear regression approa…
This paper evaluates the usefulness of detailed magnetic surveying at the Aprelkovo gold deposit in Transbaikalia, where thin quartz sulfide veins occur mainly within diorite and electrical prospecting methods proved limited. Using magnetic field measurements, averaged anomaly analysis, grid selecti…
This paper reports laboratory measurements of the physical properties of oil from well 123 of the Olenye field in Tomsk Oblast, sampled under reservoir conditions from Upper Jurassic bed Yu-1. It presents saturation pressure, density, gas content, formation volume factor, shrinkage, compressibility,…
This paper reexamines the stratigraphic significance of phosphorite occurrences in the Middle and Upper Devonian deposits of the Kolyvan-Tomsk folded zone. Using published geological mapping, lithological correlations, and faunal determinations from limestone, shale, and volcanogenic-sedimentary uni…
This paper examines albite-nepheline pegmatoid veinlike bodies associated with alkaline intrusions in Northeastern Tuva, focusing on unusual occurrences within hornblende syenites rather than typical nepheline syenites. Using field relationships, petrographic observations, mineralogical descriptions…
This paper examines the origin of linearly elongated magnetic anomalies at the Darasun gold ore deposit, where complex anomaly profiles are spatially associated with quartz sulfide veins, dikes, and tectonic disturbances. Using detailed magnetic field measurements, quantitative comparison with expec…
This paper presents an engineering-geological assessment of overburden and coal-bearing rocks at the Tataurovo brown-coal deposit near Chita, with emphasis on parameters needed for open-pit slope design. Based on tests of 203 monolith samples from exploratory boreholes, the authors determine litholo…
This paper examines the structure of weak magnetic fields at vein-type gold deposits hosted by sedimentary and metamorphosed sedimentary rocks, using the Nikolaevsky sector of the Lyubavinskoye deposit in Eastern Transbaikalia as an example. Detailed magnetic survey data were analyzed statistically …
This paper characterizes a 45 to 49 m Quaternary sequence exposed by boreholes in the Urop-Yuzhny area of the Urop coal deposit on the right bank of the Inya River, Kuzbass. Using lithological descriptions, grain-size and chemical analyses, mineralogical data, and palynological assemblages, the auth…
This paper examines the unexpected absence of the Thick coal seam of the Nazarovo brown coal deposit in the former Chertovo Lake area, where open-pit stripping and borehole data revealed a localized loss of the seam previously thought to be continuous. The authors describe geological observations fr…
This paper examines the interpretive value of analytically continuing gravity anomalies into the lower half-space, despite known instability and error growth beyond singular points of disturbing bodies. Using gravity data from the Baley district in Eastern Transbaikalia, the authors recalculate the …
This paper addresses calculation of the setting angle for a deflecting wedge used to change the azimuth of a borehole in three-dimensional deviation. Building on previously derived formulas that avoid simplifying assumptions but are difficult to use directly, the authors describe computer calculatio…
This paper examines the structure and ore prospects of the northwestern vicinity of a gold-sulfide hydrothermal deposit using areal magnetic survey data. The authors analyze linearly elongated anomalies in the vertical magnetic field component, distinguish two main anomaly types, and compare their o…
This paper characterizes horizon A-I of the Vartovskaya Formation in the Sovetskoye oil field using core descriptions, well testing, and production geophysical logs from numerous wells. It describes a heterogeneous sandstone, siltstone, and clay succession with increasing clay content upward, variab…
This study examines whether oxidative heat treatment of finely dispersed chromic electrocorundum in a fluidized bed can improve subsequent magnetic beneficiation compared with treatment in a muffle furnace. Samples of 40 to 70 micron material were roasted under previously established optimal conditi…
This study examines how the concentration of bentonite suspensions affects surface tension and rheological properties relevant to bonding in granulated capillary-porous bodies. Using Tagansk bentonite suspensions ranging from 5 to 20 percent by weight, the authors measured surface tension by bubble …
This paper examines the potential of metal oxides as regenerable adsorbents for removing carbon dioxide from gases, emphasizing chemisorption through carbonate formation as a route to capacities greater than those typical of zeolites. Seventeen oxides were prepared by vacuum thermal decomposition of…
This paper evaluates the Koltogor deposit of low-melting loams near Strezhevoe as a local raw material source for construction in the oil- and gas-bearing northern districts of Tomsk Oblast, where imported materials limited industrial and housing development. It characterizes the loams by occurrence…
This study examines steatite ceramics as a mechanically stronger and more stable replacement for lime-sodium glass in the weakly conducting stator of an electrostatic generator. The authors prepared several steatite bodies by varying talc, clay, and barium carbonate contents, with particular attenti…
This study examines the transesterification reaction of dimethyl phosphite with aromatic alcohols used as models for structural units of lignin, in order to compare the reactivity of aliphatic hydroxyl groups. A series of phenylpropyl, guaiacylpropyl, and veratrylpropyl alcohols was heated with dime…
This study examines the phosphorylation of several lignin preparations with dimethyl phosphite, with attention to the reaction pathway involving lignin functional groups. Dioxane, copper-ammonia, ultrasonic, activated, and technical hydrolysis lignins were reacted under excess reagent or in benzene …
This study examines the phosphorylation of model lignin compounds and uses infrared spectroscopy to determine the position of thiophosphoryl substitution. Thiophosphates and dithiophosphates of guaiacol, 1-veratryl-1-propanol, 1-guaiacyl-1-propanol, and vanillin oxime were prepared under varied cond…
This study examines the electrophotographic properties of poly-9-vinylcarbazole fractions obtained by revinylylation, with particular attention to the otherwise poorly charge-retaining high-molecular-weight fraction. Films were prepared on metal substrates from polymer solutions and tested for charg…
This study examines whether replacing the urea fragment in known low-toxicity benzylacyl urea derivatives affects anticonvulsant activity. A series of N-benzyl-N1-acyl derivatives of diamides of oxalic, malonic, and succinic acids was synthesized by acylating corresponding acid amides, mainly with m…
This paper describes the preparation of iodine derivatives of phenanthrenequinone as potentially useful compounds obtainable from coal tar products. The authors use direct electrophilic iodination in a sulfuric and nitric acid medium to synthesize 2-iodophenanthrenequinone and 2,7-diiodophenanthrene…
This study examines the direct iodination of fluorene to 2,7-diiodofluorene in glacial acetic acid using iodine in the presence of a sulfuric and nitric acid mixture, a one stage alternative to multistep routes through nitration, reduction, and diazotization. The authors varied reaction temperature …
This study examines whether a direct iodination method previously developed for aromatic compounds can be applied to fatty acid derivatives. Acid chlorides of acetic, propionic, and butyric acids were reacted with iodine in the presence of a sulfuric and nitric acid mixture, followed by hydrolysis, …
This paper presents a method for producing diphenic acid from dimethoxy peroxide, addressing limitations of earlier oxidation procedures that used costly oxidants or generated problematic wastes. The authors develop a one-stage process in which dimethoxy peroxide is cleaved in methanol, the resultin…
This paper reports the synthesis of new acyl derivatives of 5,5-substituted barbituric acids intended for evaluation of how nitro and halogen substituents in the acyl residue may affect anticonvulsant activity. Barbiturates were acylated with acid chlorides of meta-nitrobenzoic, ortho-nitrobenzoic, …
This study examines the hydrolytic stability of nine acyl derivatives of barbituric acids prepared in the search for anticonvulsant agents. Hydrolysis in aqueous alcoholic solution at elevated temperature was followed by changes in electrical conductivity, using calibration curves to estimate degree…
This study examines the synthesis of 4-stearylaminoantipyrine, a compound reported by the authors as previously undescribed and considered pharmacologically promising because of anti-inflammatory and antipyretic activity with low toxicity in tests. The compound was prepared by acylating 4-aminoantip…
This study examines the acid hydrolysis of antipyrylamides of substituted aromatic acids, motivated by the possibility that hydrolytic stability may influence their reported anti-inflammatory and antipyretic activity. Hydrolysis was measured in hydrochloric acid aqueous or aqueous-alcoholic media at…
This study examines the acylation of N-benzylurea with substituted benzoic acids as a possible way to modify a compound previously found to have anticonvulsant activity but considerable toxicity. Using phosphorus trichloride in xylene, the authors tested a method earlier applied to aliphatic acids a…
This paper reports the synthesis of new pyrazolylamides of toluic acids as part of a study of how methyl substitution influences the physiological activity of acyl derivatives of 4-amino-5-pyrazolones. The authors prepared derivatives using isomeric toluic acids as acylating components, with phospho…
This paper reports the synthesis of substituted amides of 9-hydroxyfluorene-4-carboxylic acid and 9-bromofluorene-4-carboxylic acid as intermediates for potential adrenoblocking medicinal compounds. Motivated by efforts to obtain analogs related to dibenamine with reduced toxicity and retained physi…
This study addresses the preparation of 3-acetyl-6,9-diethylcarbazole, a carbazole derivative of interest as an intermediate for vinyl monomers, physiologically active compounds, and related products. The work examines the reduction of 6-acetyl-9-ethylcarbazole to 6,9-diethylcarbazole using aqueous …
This study investigates preparative methods for 9-hydroxymethyl and 9-(2-hydroxy)propyl derivatives of 3-chloro- and 3,6-dichlorocarbazoles, compounds of interest in the search for physiologically active substituted carbazoles. The authors examine the effects of reagent ratios, catalysts, solvents, …
This paper examines how preliminary heat treatment, termed bertination, affects the kinetics of volatile release during thermal destruction of Itat brown coal. The authors argue that removing low-temperature reactions should increase the effective activation energy, then test this using derivatograp…
This study examines how peat group composition influences thermal decomposition and volatile release during slow pyrolysis. Using derivatographic analysis in a nitrogen atmosphere at a programmed heating rate, the authors measured decomposition-rate curves for whole peat, extracted group components,…
The paper addresses the contested role of hydrogen in the synthesis of organic compounds from carbon monoxide and water vapor. It compares possible routes of hydrogen formation, including carbon monoxide conversion with steam and steam conversion of hydrocarbons, and proposes a simplified reaction s…
This paper qualitatively examines how the linear velocity of a reactant flow affects the temperature dependence of a heterogeneous reaction occurring in the external transition region. Using the approach of Zel’dovich, the authors argue that increasing flow velocity reduces the concentration differe…
This study examines the chemical products formed during experimental blast furnace smelting of peat fuel and flux materials containing organic peat mass, iron ore, and ash. Gas composition, dust content, and yields of tar, ammonia, unsaturated hydrocarbons, and gas gasoline were measured using chrom…
This study examines how the linear velocity of synthesis gas affects the heterogeneous synthesis of organic compounds from carbon monoxide and water vapor at an excess pressure of 0.98 MN/m2. Experiments were conducted over an iron-copper reduced catalyst at 473 to 523 K, varying fictitious contact …
