Abstract The paper presents the results of a study of the species diversity of freshwater Nizhniy Kaban Lake (Kazan, Russia) by the gene 18S rRNA based on the next-generation sequencing method. Nizhniy Kaban, Verhniy Kaban, and Sredniy Kaban Lakes are included in the system of urban Kaban Lakes, which are polluted lakes according to ecological […]
Abstract The article presents the results of a study of the bacterial diversity of Verhniy Kaban Lake (Kazan, Russia) for 2016-2017 using the marker gene 16S rRNA of hydrobionts based on the next-generation sequencing method. Verhniy Kaban Lake with Sredniy Kaban Lake and Nizhniy Kaban Lake are included in the system of Kaban Lakes. The […]
Abstract The summer season becomes difficult for chimney-type cooling tower. Due to the hot atmospheric air entering the apparatus, insufficient heat removal occurs, which means undercooling of water. Ultimately, this leads to a decrease in the power of the steam turbine of a thermal power plant. In the summer, an experimental study of the irregularity […]
Abstract In this work, studies were carried out on sorption treatment in dynamic conditions of the model solution of copper ions (II) sorbing material obtained by the treatment of sediment biological wastewater treatment with low-temperature pyrolysis. Research conducted for fractions with particle sizes less than 0.5 mm and 0.5-1 mm, 1-2 mm, 2-3 mm, 3 […]
Abstract Using nuclear gamma resonance (Mössbauer) spectroscopy in the backscattering geometry, the surface layers of graphite cast irons irradiated with nitrogen ion fluxes were studied. New phases were discovered and identified that are formed in the surface layers of the studied alloys during the implantation of nitrogen ions. A relationship has been established between the […]
Abstract The paper presents an analysis of methods for monitoring the flow and pressure of crankcase gases, a method for measuring the pressure of crankcase gases using the built-in diagnostic system. The authors investigated the prospects, advantages and disadvantages of the method of diagnosing an engine by the flow rate and pressure of crankcase gases, […]
Abstract The paper describes aspects related to the design stages of modern residential buildings. Reflected is the lack of requirements for the presence or absence of stagnant zones in residential premises of apartment buildings. Convective flows were simulated in the living room of a multi-room apartment of a multi-unit standard panel house. It is shown […]
Abstract The ability to find a derivative and use it in different fields plays a large role in the practical activities of students, both in technical specialties, and in economic, and humanitarian ones. The concept of the derivative is one of those mathematical concepts that are intersubjective in nature and are actively used in economic, […]
Abstract The process of spraying a liquid has a wide range of applications in various fields of technology. The spray characteristics primarily rely on design features of the sprayers and their modes of operation. It is known that values of the flow rate and capture radius of the sprayed jets depend on the pressure, nozzle […]
Abstract Environmental problems are becoming more acute for modern humanity with every passing year. The quality of atmospheric air is of particular concern. It is polluted by the industrial emissions, car exhaust, energy enterprises and other anthropogenic sources [1]. Atmospheric air is a vital component of the natural environment, an integral part of the environment […]