Basic numerical modeling for the implementation of measures to improve the environmental situation at facilities

2022 ◽  
Vol 14 (4) ◽  
pp. 29-34
Author(s):  
Alla Zvyaginceva ◽  
A. Samofalova ◽  
V. Kul'neva
Keyword(s):  
Surface Tension ◽  
Numerical Modeling ◽  
Iron Ore ◽  
Preventive Measures ◽  
Dust Particles ◽  
Ecological Situation ◽  
Central Chernozem Region ◽  
Specific Object ◽  
Central Chernozem ◽  
General Technical

The problems of the ecological situation in the Central Chernozem region at technosphere objects of strategic importance are consired. As a specific object, AO "Lebedinsky GOK" which is a favorite for the extraction of iron ore on Russian and world trading platforms. Effective industrial general technical preventive measures are recommended, focused on reducing the emission of dust particles during serial blasting of iron-containing rocks at a specific facility. The most effective preventive measures to minimize the concentration of dust and gases are considered. The application of the method of controlling the wetting and sticking of dust particles is shown. It is based on the use of solutions of surfactants (surfactants). An anionactive surfactant based on triethanolamine salts is recommended. The concentration of the surfactant is selected according to the value of the surface tension of the solution.

A PECULIARITIES OF PRINCIPAL DISEASES MANIFESTATION ON STRAWBERRY

1970 ◽  
pp. 41-44
Author(s):  
М. I. Zubkova ◽  
G. V. Nasonova ◽  
S. D. Knyazev
Keyword(s):  
Preventive Measures ◽  
Leaf Spots ◽  
Planting Material ◽  
Central Chernozem Region ◽  
Resistant Varieties ◽  
Brown Leaf ◽  
Before And After ◽  
High Level ◽  
Central Chernozem ◽  
Selection Of

Data on the resistance of the strawberry varieties to the above diseases are presented in the article. Many modern strawberry varieties having a high level of commercial characters are susceptible to diseases. White and brown leaf spots are the most harmful diseases in the conditions of Orelregion. With mass infection of strawberry plants, pathogens can affect up to 90% of the leaf mass. The aim of the studies was to evaluate the strawberry varieties for resistance to white and brown leaf spots and identify the most promising varieties for the further breeding. 41 domestic and foreign strawberry varieties have been studied. Currently, the main preventive measures against diseases are the selection of resistant varieties, the use of healthy planting material, as well as the control of leaf infections with fungicides before and after harvest. As a result of the studies, the most resistant varieties to white and brown leaf spots have been identified: Bogema, Bereginya, Rosinka and Krymskaya Rannia which are mostly promising for cultivation in the Central Chernozem region. The strawberry varieties Jonsok, NF 311, Sara, Marmolada, Sonata, Civ 64, Rubin and Frida were susceptible to white and brown leaf spots during three years with the degree of damage 3 points.

DEN POBEDY IS THE NEW VARIETY OF APPLE TREE

1970 ◽  
pp. 33-35
Author(s):  
Е. N. Sedov ◽  
T. V. Yanchuk
Keyword(s):  
Apple Tree ◽  
Average Density ◽  
New Variety ◽  
State Register ◽  
Central Chernozem Region ◽  
Great Patriotic War ◽  
Main Color ◽  
Central Chernozem ◽  
Time Of Harvest ◽  
Medium Weight

In 2020, the 75th anniversary of Victory in the Great Patriotic War was celebrated. Many soldiers and did not survive to see the end of the war. It is important that people living now remember and honor those who gave their lives for the freedom and independence of our country and those who came from the war in difficult conditions to restore the national economy of the country. In memory of those who courageously defended the independence of our great country, we named a new apple cultivar ‘Den Pobedy’ (Victory Day), which took 33 years to create. In 2020, this cultivar was included in the State Register of breeding achievements and it is recommended for cultivation in the Central-Chernozem region including Belgorod, Voronezh, Kursk, Lipetzk, Orel and Tambov regions. This cultivar was developed by crossing are quite commonly known winter cultivar ‘Veteran’ and foreign cultivar ‘Horcout’. Trees have a drooping crown. The main branches are curves. A characteristic feature of this cultivar is that the branches from the trunk depart at an angle close to straight. The main number of fruits is located on short fruit formations. Fruits are of medium weight (140 g), conical, wide-ribbed. The main color of the fruit at the time of harvest is greenish. The cover color occupies most of the surface of the fruit in the form of red blush. The fruit flesh is white, greenish of average density. The appearance (attractiveness) of the fruit is estimated at 4.4 points, and the taste - at 4.3 points (5-point rating). Fruits contain 14.7 % of sugars and 9.2 mg/100 g of ascorbic acid (vitamin C). Harvest in Orel region is in mid-September, the consumer period of fruits is until mid-March. The cultivar regularly bears fruit and has high product and consumer qualities.

scholarly journals Marangoni Convection of Dust Particles in the Boundary Layer of Maxwell Nanofluids with Varying Surface Tension and Viscosity

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1072
Author(s):  
Khaled S. AlQdah ◽  
Naseer M. Khan ◽  
Habib Ben Bacha ◽  
Jae-Dong Chung ◽  
Nehad Ali Shah
Keyword(s):  
Surface Tension ◽  
Nusselt Number ◽  
Temperature Distribution ◽  
Dust Particles ◽  
Physical Parameters ◽  
Temperature Dependent Viscosity ◽  
Liquid Phases ◽  
Variable Surface ◽  
Basic Equations ◽  
Dependent Viscosity

The flow of nanofluids is very important in industrial refrigeration systems. The operation of nuclear reactors and the cooling of the entire installation to improve safety and economics are entirely dependent on the application of nanofluids in water. Therefore, a model of Maxwell’s dusty nanofluid with temperature-dependent viscosity, surface suction and variable surface tension under the action of solar radiation is established. The basic equations of momentum and temperature of the dust and liquid phases are solved numerically using the MATLAB bvp4c scheme. In the current evaluation, taking into account variable surface tension and varying viscosity, the effect of dust particles is studied by immersing dust particles in a nanofluid. Qualitative and quantitative discussions are provided to focus on the effect of physical parameters on mass and heat transfer. The propagation results show that this mixing effect can significantly increase the thermal conductivity of nanofluids. With small changes in the surface tension parameters, a stronger drop in the temperature distribution is observed. The suction can significantly reduce the temperature distribution of the liquid and dust phases. The stretchability of the sheet is more conducive to temperature rise. The tables are used to explain how physical parameters affect the Nusselt number and mass transfer. The increased interaction of the liquid with nanoparticles or dust particles is intended to improve the Nusselt number. This model contains features that have not been previously studied, which stimulates demand for this model among all walks of life now and in the future.

scholarly journals Agro-economic substantiation of the feasibility of green manured fallow in sugar beet crop rotations of the Central Chernozem Region

2021 ◽  
Vol 32 ◽  
pp. 02001
Author(s):  
Alexander Akimenko ◽  
Vyacheslav Sviridov ◽  
Tatiana Dudkina
Keyword(s):  
Sugar Beet ◽  
Crop Rotation ◽  
Crop Rotations ◽  
Mineral Fertilizers ◽  
Typical Chernozem ◽  
Central Chernozem Region ◽  
Sugar Beet Crop ◽  
Absolute Decrease ◽  
Central Chernozem

The aim of the study is to find out the feasibility of including green manured fallow in specialized sugar beet crop rotations by comparing necessary assessment indicators with their values in a traditional crop rotation with black fallow against the background of unequal fertilization levels. The study was based on the analysis of experimental data from a long-term stationary experiment, laid out simultaneously in all fields and variants on typical chernozem in triplicate. The results are as follows: within the same fertilization levels, no significant differences in the yield of winter wheat (sugar beet precursor) were revealed, and the yield of sugar beet in a crop rotation with green manured fallow was stably higher (no more than 5 to 7%), an increase in yield relative to the control fertilizer variant (6 tons of manure per hectare per year) against the background of a double rate of manure in combination with mineral fertilizers amounted to 21.7 to 23.4% for wheat and 14.3 to 15.6% for beets with an increase in the productivity of crop rotations (in natural and value terms) by 1.2 times, but an increase in costs by 1.3 times caused an absolute decrease in the level of profitability by 23 to 25%. Differences in the assessment indicators for specific fertilization variants increased over time due to an unequal degree of soil fertility reproduction, and therefore in the fifth cycle of the crop rotation with black fallow turned out to be 1.1 to 1.3 times greater than in the green manured rotation.

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