Recent Papers

Radioecological Monitoring of Environmental Media in the Vicinity of the Kozloduy Nuclear Power Plant

Determination of Lead in Waters Using a Lead-Selective Electrode

Measurement of Magnetic Field Strength in Resistance Welding

Hygienic Aspects of the Study of Carcinogenic N-Nitroso Compounds

EFFECT OF A LOW-FREQUENCY ELECTRIC FIELD ON THE REPRODUCTIVE FUNCTION OF ANIMALS

Particular Features of Experimental Design and Multivariate Statistical Analysis in Determining Threshold and Harmless Levels of Exposure to Harmful Chemical Substances

A New Direction in the Disinfection of Water with Ultraviolet Rays

Antimicrobial Wool Materials for the Prevention and Treatment of Skin Diseases

*Pseudomonas aeruginosa* and the Hydrosphere: Surface Waters

Application of Graphical Methods of Mathematical Statistics to the Analysis of the Effects of Chemical Environmental Pollutants on Microorganisms

On the Potential Hazard of the Embryotoxic Effects of the Herbicide Betanal (Experimental Data)

Radiation Safety of Patients in Pediatric Radiology

Automated System for Processing Primary Information on Personnel and Their Morbidity with Temporary Disability

Investigation of the Composition of Thermal Degradation Products of Biologically Active Compounds as Atmospheric Pollutants

Experience in the Use of Structural-Logical Schemes in Teaching Hygiene

On the Significance of the Biological Factor in Environmental Pollution

Experience in Monitoring the Physical Development of General School Pupils

Cytological Studies of the Gonadotoxic Effects of a Mixture of Substances Migrating from Enameled Articles Intended for Contact with Foodstuffs

Gas Chromatographic Analysis of Trace Amounts of Thiocarbamic Acid Herbicides in Environmental Samples

On the Toxicity of Extracts from Rubbers Made with Different Rubber Bases and Containing Thiuram in Their Formulations

Research Methods

Health Education of the Population in the Formation of a Healthy Lifestyle

Investigation of the Pyrolysis Process of Samotlor Oil Fractions

This study examines pyrolysis of gasoline fractions from Samotlor crude oil as potential feedstocks for monoolefin production in planned Western Siberian petrochemical complexes. The 32 to 120, 32 to 180, and 120 to 180°C fractions were characterized by group composition and processed in an enlarged…

Investigation of the kinetics of synthesis from carbon monoxide and water vapor by the flow-circulation method

This paper addresses the need for kinetic data on the catalytic interaction of carbon monoxide with water vapor, a reaction related to Fischer Tropsch synthesis for which satisfactory rate equations and mechanistic consensus were lacking. It describes a flow circulation, gradientless experimental ap…

Crystallization of Petroleum Paraffins

This study examines the relationship between the onset of petroleum paraffin crystallization and the solidification of paraffin-containing oils from Western Siberia. Solidification temperatures were determined by loss of fluidity, while mass paraffin crystallization was followed through cooling curv…

Simplex Design of Experiments in the Study of the Hydrocarbon Pyrolysis Process

This paper applies simplex experimental design to optimize hydrocarbon pyrolysis conditions for ethylene production from the 180 to 350°C fraction of Samotlor crude oil. Three process variables are varied: reactor outlet temperature, feed rate, and steam dilution, with ethylene yield used as the res…

Study of the Mechanism of Structure-Forming Processes in Crude Oils

This study examines structure formation in paraffin-containing crude oils from Western Siberia, focusing on viscosity-temperature behavior, heat treatment, holding time, and the kinetics of structural strengthening. Dynamic viscosity measurements and limiting shear stress measurements using a tangen…

Research in the Chemistry of Carbazole

The study examines the molecular-weight distribution of 9-vinylcarbazole telomers formed by radical telomerization in halogen-containing methanes using azobisisobutyronitrile as initiator. Telomer samples prepared in chloroform, carbon tetrachloride, carbon tetrabromide, bromoform, and iodoform were…

Research in the Chemistry of Carbazole

This study examines the polymerization of 3-chloro-9-vinylcarbazole in solution under radical initiation by azobisisobutyronitrile and under catalysis by stannic chloride. Dilatometric kinetic measurements in benzene showed first-order dependence on monomer, half-order dependence on initiator, an ac…

Adsorption Kinetics of Organic Surfactants and the APN Method

This paper examines how the kinetics of surfactant adsorption affects electrochemical measurements by the APN method, where assuming adsorption equilibrium can lead to unreliable results. Using a simplified model in which adsorbed surfactant molecules block the cathodic process, do not affect amalga…

On methods for calculating the ?'-potential in the presence of organic substances adsorbed on the electrode

This paper examines methods for calculating the potential at the outer Helmholtz plane in the presence of organic surface-active substances adsorbed on an electrode. It compares calculations based on the Gouy-Chapman relation, a two-parallel-capacitor adsorption model, and shifts of the electrocapil…

Study of the drying kinetics of certain pharmaceutical preparations

The study examines the drying kinetics of the pharmaceutical preparations sulfadimethoxine and sulfadimezine under convective heat supply, addressing the need for data to select efficient continuous drying methods and calculate drying equipment. Experiments were performed with a DI-8 moisture meter …

Synthesis of Some Derivatives of 2'-Formyldiphenyl-2-carboxylic Acid

This study examines the preparation of derivatives of 2′-formylbiphenyl-2-carboxylic acid, an intermediate of interest for biologically active and practical compounds, with emphasis on the isobutyl ester oxime. The authors systematically varied reaction temperature, duration, catalyst type and amoun…

Study of the Hydrolytic Stability and Solubility of Stampirin

This study examines the hydrolytic stability and solvent solubility of stampirin, a stearic acid antipyrilamide with reported anti-inflammatory activity, to support development of synthesis, purification, and analytical procedures. Hydrolysis was tested in water, sodium hydroxide, and hydrochloric a…

Determination of the Elemental Composition of Oils by Gas Chromatography

This study examines the application of gas chromatography to elemental analysis of oils, focusing on determination of carbon and hydrogen as principal oil components. An apparatus with a closed helium system was constructed, samples were combusted with nickel oxide at 900 to 950°C, water was convert…

Study of Vanadium Distribution in ITC Fractions of Oils from Western Siberian Fields

This study examines the content and distribution of vanadium in true boiling point fractions of Western Siberian crude oils, motivated by its geochemical significance and its adverse effects in refining and high-temperature fuel use. Vanadium was quantitatively determined by neutron activation analy…

Study of Hydrocarbon Decomposition Products in a High-Voltage Pulsed Discharge

This study examines the decomposition of liquid hydrocarbons in high-voltage pulsed discharges as a route to acetylene, lower olefins, hydrogen, and carbonaceous products. Normal and branched paraffins, cycloparaffins, and aromatic hydrocarbons were treated using a pulse-voltage generator, and the g…

Correlation between Specific Gravity, Coking Capacity of Oils, and Their Molecular Weight

This study examines statistical relationships among crude oil specific gravity, coking capacity, and molecular weight in order to estimate properties that are difficult to determine directly. Using published and laboratory data for crude oils, the authors tested distribution normality, calculated pa…

On Predicting the Content of Paraffin and Resin-Asphaltene Substances in Oils

This paper examines whether a limited set of routine physicochemical indices can be used to predict paraffin and resin-asphaltene contents in crude oils, reducing the need for extensive laboratory characterization during exploration and process design. Using experimental data for oils from eastern r…

On the Determination of Octane and Cetane Numbers by a Calculation Method

This paper examines computational determination of octane and cetane numbers as an alternative to standardized engine and flash coincidence tests that require specialized equipment. Using accumulated standardized fuel data, the authors apply correlation analysis, linear multiple regression, and prin…

Testing of Some Catalysts in the Synthesis from Carbon Monoxide and Water Vapor

This study evaluates inexpensive iron-containing catalysts for synthesis from carbon monoxide and water vapor, a process for which catalyst selection had received little focused attention. Various industrial and laboratory catalysts, including Fischer-Tropsch iron-copper catalysts, fused iron, iron-…

Effect of the Gas Phase on the Current Magnitude in a Contactless Reduction Cell

This study examines emission currents in a contactless reduction cell as a possible indicator of surface processes during reactions between separated solid reactants, using graphite and iron oxide as model materials. A quartz cell with fixed sample spacing and electrometer measurement was used to de…

Dynamics of Iron Oxide Reduction during Heat Treatment of Fuel-Smelting Materials

This study examines the reduction of iron oxides in peat ore fuel smelting moldings during heat treatment, focusing on the roles of gaseous, liquid, and solid products of peat pyrolysis. Using derivatographic gas evolution measurements, chromatographic analysis of carbon oxides, hydrogen, and methan…

Study of the Microstructure of Solid Residues of Peat-Ore Compositions

This study examines changes in the carbon microstructure of solid residues formed during heat treatment of peat and peat ore briquettes containing iron oxides. Samples were heated in a laboratory shaft furnace up to 1200°C, deashed, and analyzed by X-ray diffraction, with particular attention to the…

Investigation of the porous structure of heat-treated peat-ore materials

This study examines how heat treatment and iron oxide additions affect the porous structure of peat-based moldings. Samples of high-moor peat and peat with finely dispersed iron oxide were heated in a laboratory shaft furnace, then analyzed by mercury intrusion porosimetry over an effective pore-rad…

Effect of Pressure on the Composition of Products Synthesized from Carbon Monoxide and Steam

This study examines how pressure affects the composition of products formed in catalytic synthesis from carbon monoxide and steam. Experiments were conducted over an iron-copper catalyst on kieselguhr at 255°C and pressures of 10, 50, and 100 atm, with analysis of liquid product properties and the h…

Hydrocarbon Composition in the Products of Synthesis from Carbon Monoxide and Steam

This paper examines the component composition of liquid products formed by synthesis from carbon monoxide and water vapor, with attention to hydrocarbons, alcohols, and acids. Using gas liquid chromatography, including temperature programmed packed columns and capillary column analysis with retentio…

Testing of Selected Demulsifiers for Desalting and Dehydration of Typical Crude Oil from the Tomsk Petrochemical Plant

This paper evaluates selected demulsifiers for desalting and dehydration of typical crude oil from the Tomsk Petrochemical Plant, emphasizing the need for laboratory selection because demulsifier performance depends on crude composition and treatment conditions. Domestic reagents OZhK and KAUFE-14 a…

Study of Gas Condensate from the North-Silginskoye Field

This study characterizes gas condensate from the North-Silginskoye field in Tomsk Oblast through fractional distillation, physicochemical measurements, and group and structural group hydrocarbon analysis. The condensate is a light, low sulfur, resin free material dominated by paraffinic hydrocarbons…

Resources of Light Hydrocarbons in Typical Crude Oil for the Tomsk Petrochemical Complex

This study evaluates the availability of light hydrocarbons, C3 to C5, in crude oil supplied through the Aleksandrovskoye to Anzhero-Sudzhensk pipeline for use as pyrolysis feedstock at the Tomsk Petrochemical Plant. Oil samples collected in July and December 1972 at upstream pipeline points and at …