Sereda N.A. The reasons for research and development of foodstuff transferring devices
The reasons for research and development of foodstuff transferring devices
Sereda N.A.
The ways to mechanize supporting operations of processing machines and food production lines have become an urgent problem. In many manufacturing companies, supporting operations are performed manually due to the shortcoming of existing machines. The paper considers the reasons for research and development of foodstuff transferring devices. They will perform a number of operations in the kinematic cycle: gripping, holding, transferring and releasing the item. The most important indicators of transferring devices will include efficiency, power consumption, accuracy of gripping and releasing operations. The ways to enhance the performance of theoretical methods for reducing energy consumption and technological machines are discussed. The ways to improve transferring devices are presented.
Keywords: technological process, manipulator, gripping device, goods, productivity.
References
- Shahumyan G.A. Machines and automatic lines. – Moscow, 1961. – 522 C.
- Device for transfer wares / Gorlatov A.S., Sereda N.A. // Pat. Russian Federation № 2412046. – № 2009101727/02; stated 20.01.2009; publ. 20.02.2011 in BIUM, 2011, № 5.
- Device for transfer wares / Gorlatov A.S., Sereda N.A. // Pat. The Russian Federation № 2438858. – № 2010109574/02; stated 15.03.2010, publ. 10.01.2012 in BIUM, 2012, № 1.
- Device for transfer wares / Gorlatov A.S., Sereda N.A. // Pat. The Russian Federation № 2438857. – № 2010109573/02; stated 15.03.2010, publ. 10.01.2012 in BIUM, 2012, № 1.
- Sereda N.A. Improvement of manipulators for transfer of piece wares, with reference to technological lines of food production // Proceedings of II International conference «Modern mechanical engineering. Science and education». – St-Petersburg, 2012. – P. 670–679.
- Sereda N.A. Analysis of the manipulator’s design for transfer of piece wares with a complex movement of the leading link of the actuator // Machinery and technology, 2013, № 2. – P. 7-13.
«Engineering industry and life safety» №3 (17), 2013. Pages: 72-77
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Sereda Natalia Aleksandrovna – Graduate student, Kaliningrad State Technical University, Kaliningrad, Russia. E-mail: seredanal@mail.ru
Mustyukov N.A. Integration of CAD and CAE models based on the development of STEP, XML, DXF format analyzer
Integration of CAD and CAE models based on the development of STEP, XML, DXF format analyzer
Mustyukov N.A.
Much of the work in the field of automated design is devoted to the research of individual components of automated design systems (CAD), the development and improvement of mathematical models of design objects, algorithm implementation, creating databases, creating and configuring user interfaces. However, the formation facts of a complex architecture of CAD and interaction of its various components have not been properly studied. Integration components being responsible for data exchange between different groups subsystems, both own and third-party developers, take the central place in the architecture under discussion. The paper presents the software of interaction between CAD and CAE systems based on the analysis of STEP, XML, DXF data formats. The software allows to perform conversion of CAD-model in the desired CAE-model by simplifying and specifying significant layout indicators. This module is the basis for developing an integrated CAD.
Keywords: CAD-model, CAE-model, integration, data format, software, extruder.
References
- Anikeev G.E., Vasilets A.N. Overview the technologies of integration CAD and CAE, 2006. http://network-journal.mpei.ac.ru/cgi-bin/main.pl?l=ru&n=9&pa=11&ar=1
- Kartashov L.P., Zubkova T.M. Parametrical and structural synthesis of technological objects basis on the system approach and mathematical modeling. – Yekaterinburg: URORussianAcademy of Sciences, 2009. – 211 p.
- Mustyukov N.A., Zubkova T.M., Koryakina M.A. Certificate of official registration the computer program No. 2011612043 Calculation of technical and economic parameters of single-screw extruder / ROSPATENT – No. 2010617272 – It is declared 19.11.2010. – Publ. 05.03.2011.
- Poleschuk N. AutoCad2004 Development and adaptation of applications. – SPb.: BHV-Petersburg, 2004. – 624 p.
«Engineering industry and life safety» №3 (17), 2013. Pages: 67-71
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Mustyukov Nail Anvarovich – Graduate student, Orenburg State University, Orenburg, Russia. E-mail: 256nail@mail.ru
Lukienko L.V., Isaev V.V. Determination of hardness values of the transfer mechanism to assess the loading of heavy-duty production machines
Determination of hardness values of the transfer mechanism to assess the loading of heavy-duty production machines
Lukienko L.V., Isaev V.V.
The paper presents the results of analytical determination of gear rigidity index of the production machine feeding mechanism to estimate dynamic loading of a rack-and-pinion transfer system. The APM WinMachine software is used for this purpose. The analysis of the results shows that rigidity of rack-and-pinion and pin wheel considerably outdoes the rigidity of feeding mechanism gears. The teeth rigidity of the driving wheel of a rack-and-pinion transfer system depends on the load point and changes to 23.5%. The rigidity of a gear – pin wheel transmission is 32.27% higher than that of a gear – rack-and-pinion transmission system. The validity of received results is confirmed by the acceptable similarity of certain values of equivalent tension with the previous research results. The difference in values of equivalent tension doesn’t exceed 12.3%. It is advisable to use a three-mass dynamic model for further research work.
Keywords: modeling, rigidity index, feeding mechanism.
References
- Stationary and braking modes chainless motion systems of clearing combines / Brenner V.A., Golovin K.A., Kovaleva T.V., Lukienko L.V., Pushkarev A.E. – Tula: Tula State University Publishing House, 2007. – 220 p.
- Chainless supply system of clearing combines / Y.N. Semenov, V.G. Lukienko, B.M. Geller – Moscow: Nedra, 1988. – 152 p.
- Komarov M.S. The dynamics of machines and mechanisms. – Moskow: Mashinostroenie, 1969. – 295 p.
- Boyko N.G. Dynamics of clearing combines. –Donetsk: Donetsk National Technical University, 2004. – 206 p.
- Increase in the carrying capacity of gears coal combines: Research Report (final): 75-55 / Donetsk Polytechnic Institute: hands. Alshits Y.I.: the executable.: Boyko N.G. [etc.] – Donetsk, 1978. – 137 p. – Bibliography.: 135-137. – № GR 76038297. – Inv. Number B716636.
«Engineering industry and life safety» №3 (17), 2013. Pages: 61-66
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Lukienko Leonid Viktorovich – Professor, Novomoskovsky Institute D.Mendeleyev University of Chemical Technology of Russia, Novomoskovsk, Russia. E-mail: lukienko_lv@mail.ru
Isaev Vladimir Vladimirovich – Graduate student, Novomoskovsky Institute D.Mendeleyev University of Chemical Technology of Russia, Novomoskovsk, Russia. E-mail: vladimir_isaev_1988@mail.ru
Zelinskiy V.V., Borisova E.A. Experimental estimation of magnetic treatment effect on tool steels wear resistance
Experimental estimation of magnetic treatment effect on tool steels wear resistance
Zelinskiy V.V., Borisova E.A.
The article presents the results of an experimental study of magnetic-impulse processing effect on the wear of steel samples used for manufacturing cutting tools. Particular attention is paid to the methodological aspect of wear simulation in cutting process. Scientific basics of tribology are used, which provide maximum conformity with the actual cutting conditions in terms of wear and contact parameters. The description of experimental conditions and specific experimental methods are presented. They are used for obtaining new data on the effect of magnetic treatment on the wear of steels under study. Varying one of the factors of the magnetic field, that is the number of impulses, it’s possible to find out its significant effect on the wear value along with specifying the optimal number of impulses. A new interpretation of the reduction wear effect is presented. It is based on the adhesion-resistant surface secondary structure of a multiple-electron system. Its safety features are realized by the normalized energy distribution of the residual magnetic field and dissipated energy of tribocontact phenomena.
Keywords: magnetic treatment, sample, friction, wear, steel, impulse, tribosystem.
References
- Zelinskiy V.V., Borisova E.A. Identification of the predominant species and causes wear of cutting tools // Engineering and Life, 2012, № 2. – P. 55-60.
- Friction, wear and lubrication (Tribology and Tribotechnics) / A.V. Chichinadze, E.M. Berliner, E.D. Brown. Ed. A.V. Chichinadze. – Moscow: Mashinostroenie, 2003. – 576 p.
«Engineering industry and life safety» №3 (17), 2013. Pages: 55-60
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Zelinskiy Viktor Vasiljevich – Ph.D., Murom Institute of Vladimir State University, Murom, Russia. E-mail: selvik46@yandex.ru
Borisova Ekaterina Aleksandrovna – Graduate student, Murom Institute of Vladimir State University, Murom, Russia. E-mail: catherine.b2011@yandex.ru
Gusev S.V. The effect of resistance and hardness of the carbide phase on tool life
The effect of resistance and hardness of the carbide phase on tool life
Gusev S.V.
Resistance analysis of milling cutters produced of different materials and alloys has been performed. The analysis demonstrates that steels of the same hardness characteristics can display different resistance. Typically, tool life increases with increasing its hardness. The presented tool materials turn out to have different carbide phase contents. The increased carbide phase content results in increasing the resistance of steels and alloys, though they feature the same hardness. The graph illustrates the effect of the carbide phase percentage on relative wear resistance of steels and alloys. A newly developed heterogeneous material can be used for cutter manufacturing. The material has a wear-resistant structure, a favorable structure combination and a complex of physical and mechanical properties: the combination of high hardness and viscosity; vibration damping; lowering E (elasticity modulus), which reduces voltage; providing self-sharpening; high resistance to compression, bending and shear.
Keywords: hardness, wear resistance, carbide phase.
References
- 1. Tenenbaum M.M. Wear resistance of structural materials and machine parts in abrasive wear. – Moscow: Mashinostroyeniye, 1966. – 332 p.
- 2. Grube A.E. Woodcutting tools. – Moscow: Forest Industry, 1971. – 344 p.
- 3. Gusev S.V., Gusev A.S. The use of heterogeneous material to improve the flexural strength of the teeth of the cutting tool // Engineering industry and life safety, 2009, № 6. – P. 97-99.
- 4. Gusev S.V., Gusev A.S. The general equation of tool wear when cutting wood // Engineering industry and life safety, 2010, № 7. – P. 94-96.
- 5. Gusev S.V., Gusev A.S. Assessing the role of vibration and thermal cycling stresses during wear the tool material // Engineering industry and life safety, 2011, № 1. – P. 25-27.
- 6. Gusev S.V., Gusev A.S. The theoretical justification for self-sharpening effect // Engineering industry and life safety, 2011, № 3. – P. 44-47.
«Engineering industry and life safety» №3 (17), 2013. Pages: 52-54
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Gusev Sergey Viktorovich – Ph.D., Murom Institute of Vladimir State University, Murom, Russia. E-mail: sergei-v.gusev@yandex.ru
Aborkin A.V., Zaharov A.A., Babin D.M., Orekhov O.P. Calculation and experimental study of power parameters of the continuous channel-angular pressing of aluminum
Calculation and experimental study of power parameters of the continuous channel-angular pressing of aluminum
Aborkin A.V., Zaharov A.A., Babin D.M., Orekhov O.P.
The paper deals with the issues of determining the effect of process parameters (such as rotor speed and friction coefficient) on the power parameters of the continuous channel-angular pressing of aluminum. The technique to carry out the experiment has been developed. Experimental data on changes in power parameters of the continuous channel-angular pressing of aluminum has been received. A simulation model for qualitative and quantitative process of the continuous channel-angular pressing of AD0 aluminum alloy has been developed and presented in numbers. The simulation model has been tested for its accuracy by comparing the calculated and experimental data. The estimation of process parameters effect on power parameters of the continuous channel-angular pressing has been obtained. The calculations have proved that increasing the rotor speed can result in 7% increase in the torque value and 20% friction coefficient increase.
Keywords: continuous channel-angular pressing, intensive plastic deformation, power parameters.
References
- Cho J.R., Jeong H.S. Parametric investigation on the surface defect occurrence in CONFORM process by the finite element method // Journal of Materials Processing Technology. Vol. 104, 2000. – P. 236-243.
- Kim Y.H., Cho J.R., Kim K.S., Jeong H.S., Yoon S.S. A study of the application of upper bound method to the CONFORM process // Journal of Materials Processing Technology, Vol. 97, 2000. – P.153-157.
«Engineering industry and life safety» №3 (17), 2013. Pages: 47-51
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Aborkin Artemiy Vitaljevich – Ph.D., Vladimir State University, Vladimir, Russia. E-mail: aborkin@vlsu.ru
Zaharov Aleksandr Andreevich – Teacher, Vladimir State University, Vladimir, Russia. E-mail: zahar21157@yandex.ru
Babin Dmitriy Michaylovich – Teacher, Vladimir State University, Vladimir, Russia. E-mail: necros-m2@yandex.ru
Orekhov Oleg Pavlovich – Student, Vladimir State University, Vladimir, Russia. E-mail: dante123473@ya.ru
Aborkin A.V., Babin D.M., Zaharov A.A., Elkin A.I. Stand development and experimental research of the process of equal channel angular pressing aluminum alloy blanks
Stand development and experimental research of the process of equal channel angular pressing aluminum alloy blanks
Aborkin A.V., Babin D.M., Zaharov A.A., Elkin A.I.
The paper deals with the issues concerning stand development and methods of carrying out experimental equal channel angular pressing AD0 aluminum alloy blanks. Research on the effect of equipment heating temperature on the energy-power costs, when pressed, is considered as well. The experimental pressing of blanks of 40 mm length and 5.5 mm square section is performed under the following process parameters: channel intersection angle Ф=120 °, channel crossing radius r=3 mm, equipment temperature θ = 20-200 ° C, pressing speed v= 10 mm/s. The experiments have provided data on the changes in power parameters pressing process. Pressing process characteristics are based on the analysis of force change chart. The blank temperature has a significant effect on the pressing force.
Keywords: equal channel angular pressing, intensive plastic deformation, energy-power costs, temperature.
References
- Valiev R.Z., Aleksandrov I.V. Bulk nanostructured metallic materials: preparation, structure and properties. – Moscow: ICC Akademkniga, 2007. – 398 p.
- Dobatkin S.V. Mechanical properties of ultrafine-grained aluminium alloys and potentialities of their usage // Technology of light alloys, 2011, №3. – P. 5-17.
«Engineering industry and life safety» №3 (17), 2013. Pages: 42-46
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Aborkin Artemiy Vitaljevich – Ph.D., Vladimir State University, Vladimir, Russia. E-mail: aborkin@vlsu.ru
Babin Dmitriy Michaylovich – Teacher, Vladimir State University, Vladimir, Russia. E-mail: necros-m2@yandex.ru
Zaharov Aleksandr Andreevich – Teacher, Vladimir State University, Vladimir, Russia. E-mail: zahar21157@yandex.ru
Elkin Aleksey Ivanovich – Ph.D., Vladimir State University, Vladimir, Russia. E-mail: elkin@vlsu.ru
Sharapov R.V. Microzoning Nizhny Novgorod NPP construction site Monakovo in terms of karst hazard based on insufficient data
Microzoning Nizhny Novgorod NPP construction site Monakovo in terms of karst hazard based on insufficient data
Sharapov R.V.
The paper deals with zoning in terms of karst hazard. An approach to zoning on incomplete data is based on computational-probabilistic technique. Indicator of karst failures intensity is used as the basis for assessing karst hazard. The above-mentioned approach is used for zoning the territory intended for the nuclear power plant construction at the site of Monakovo in Nizhny Novgorod region. Due to the fact that no proper observations have been done at the site lately, the indicators of karst failures intensity have been calculated with incomplete data (obtained mainly in the last few years). The index distribution of karst failures intensity in the area under study has been mapped. The map helps to visualize the karst danger area. The analysis shows that the area intended for the nuclear power plant construction at the site of Monakovo in Nizhny Novgorod region features an extremely high rate of karst danger.
Keywords: karst, karst failure, karst failures intensity, map, zoning.
References
- Makeev Z.A. The principles of engineering geological zoning of karst regions // Moscow Conference on Karst, vol. 4. – Molotov: Publication Molotov State University, 1948.
- Recommendations for conducting the engineering studies, design, construction and operation of buildings and structures on karst areas of the Nizhny Novgorod region. – Nizhny Novgorod, 2012. – 139 p.
- Manual of geotechnical investigations in karst areas. – Moscow: PNIIIS Russian Ministry of Construction, 1995.
- SP 11-105-97 «Engineering geological site investigations for construction». Part II «Work in the areas of hazardous geological and geotechnical processes».
- Tolmachev V.V. Engineering and building development of karst territories / V.V. Tolmachev, G.M. Troitsky, V.P. Homenko; Ed. E.A. Sorochan. – Moscow: Stroyizdat, 1986. – 176 p.
- Tolmachev V.V. On the method of quantitative assessment of environmental factors affecting the formation of karst failures. Processing of MIIT, 1968, vol. 273.
- Chervjakov V.A. The concept in the field of cartography. – Novosibirsk: Nauka, 1978. – 149 p.
- Sharapov R.V. Monitoring exogenous processes // Engineering industry and life safety, 2012, № 2. – P.39-42.
- Sharapov R.V. Some problems of exogenous processes monitoring // Fundamental research, 2013, № 1-2. – P. 444-447.
- Sharapov R.V. Indicators for monitoring and assessment of karst processes // Engineering industry and life safety, 2013, № 1. – P.28-34.
- Sharapov R.V. Determination of karst collapse intensity from incomplete data // Engineering industry and life safety, 2013, № 2. – P.36-40.
- Sharapov R.V., Kuzichkin O.R. Monitoring of Karst-Suffusion Formation in Area of Nuclear Power Plant // Proceedings of the 7th 2013 IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems (IDAACS), 12-14 September 2013, Berlin, Germany. Vol. 2, 2013. – P. 810-813.
«Engineering industry and life safety» №3 (17), 2013. Pages: 37-41
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Sharapov Ruslan Vladimirovich – Ph.D., Murom Institute of Vladimir State University, Murom, Russia. E-mail: info@vanta.ru
Tchaikovskaya N.V., Kuzichkin O.R., Sharapov R.V., Kuzichkina E.O. Accommodation problems of Nizhniy Novgorod NPP in Monakovo
Accommodation problems of Nizhniy Novgorod NPP in Monakovo
Tchaikovskaya N.V., Kuzichkin O.R., Sharapov R.V., Kuzichkina E.O.
The problem of the nuclear power plant construction at the site of Monakovo in Nizhny Novgorod region is characterized by high karst danger. The data on the reasons for the site selection is given. The issue of insufficient EIA study is discussed. The results of karst and suffusion processes research, conducted by the team of Murom Institute (branch) of Vladimir State University at Monakovo site, are presented as well. The results have confirmed the potential danger of the area intended for the nuclear power plant construction. The area of Monakovo nuclear power plant site is surrounded by a large number of karst displays which does not provide absolute operational safety of all necessary communications infrastructure and power blocks. The site is located on territory of possible development of extremely dangerous natural and man-made processes (1 danger level). This testifies to the fact of extremely dangerous karst processes at the site and features the excess of maximum acceptable parameters in time interval of NPP operation, which can cause a risk of natural and man-made disasters.
Keywords: karst, karst danger, nuclear power, Nizhny Novgorod NPP, EIA.
References
- Website of «Energoatom» Concern. http://www.rosenergoatom.ru/
- Gvozdetskiy N.A. The nature of the world. Karst. – Moscow: Mysl, 1981. – 214 p.
- Movement «No nuclear power plant in Monakovo» http://www.aesmonakovo.net/
- The Report «Assessment of the impact on the environment for the Nizhny Novgorod NPP». Energoatom, 2009. – 419 p.
- Website of Murom Town television. http://murom-tv.ru
- Kuzichkin O.R., Tchaikovskaya N.V. Features of the organization of geodynamic monitoring of nuclear power plants in the karst areas // Proceedings of the meeting «Nizhny Novgorod NPP – addressing the energy security of the Nizhny Novgorod and Vladimir regions». Nizhny Novgorod, 2010.
- TSN 22 308-98 NN «Engineering survey, design, construction and operation of buildings and structures on karst areas of Nizhny Novgorod», 1999.
- Kuzichkin O.R., Tchaikovskaya N.V. Research report «Execution of works on scientific and methodological support assessments of infestation area NPP and concept development organization karstological monitoring Nizhny Novgorod NPP using geophysical methods for monitoring geologic environments». – Murom: MI Vladimir State University, 2010. – 168 p.
- NP-064-05 «Accounting for external impacts of natural and man-made objects on the origin of the use of nuclear energy».
- Tolmachev V.V. Accounting karst hazard siting of the NPP in the light of regulations the Atomenergosupervision and IAEA // Proceedings of I Sergeevskiy reading. Vol.12. – Moscow: Publishing House of the Peoples Friendship University, 2010. – P. 182-185.
- Website of «Energoatom» Concern. http://www.old.rosenergoatom.ru.
- Sharapov R.V., Kuzichkin O.R. Monitoring of Karst-Suffusion Formation in Area of Nuclear Power Plant // Proceedings of the 7th 2013 IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems (IDAACS), 12-14 September 2013, Berlin, Germany. Vol. 2, 2013. – P. 810-813.
«Engineering industry and life safety» №3 (17), 2013. Pages: 27-36
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Tchaikovskaya Nina Vladimirovna – Professor, Murom Institute of Vladimir State University, Murom, Russia. E-mail: director@mivlgu.ru
Kuzichkin Oleg Rudolfovich – Professor, Murom Institute of Vladimir State University, Murom, Russia. E-mail: electron@mivlgu.ru
Sharapov Ruslan Vladimirovich – Ph.D., Murom Institute of Vladimir State University, Murom, Russia. E-mail: info@vanta.ru
Kuzichkina Evgeniya Olegovna – Student, D.Mendeleyev University of Chemical Technology of Russia, Moscow, Russia. E-mail: oldolkuz@yandex.ru
Shmandiy V.M., Kotenko E.O. Noise reduction of centrifugal and axial fans
Noise reduction of centrifugal and axial fans
Shmandiy V.M., Kotenko E.O.
The paper considers the problem of reducing the aerodynamic noise of centrifugal and axial fans, which are equipped with almost all businesses. We consider now the ways to apply sound attenuation fans, shows the need for a compact and highly efficient silencer combined type. These silencers are especially needed in the absence of an enterprise of the sanitary protection zone. The design of the two types of silencers, which are patented in Ukraine and that have been tested for five years. The problems of protection from aerodynamic noise axial fans, drawn attention to the difficulty in solving this problem because you cannot install on these types of fans used silencers. A description of the newly developed soundproofing screen using the feathering. The screen does not take the wind load, keeps noise control properties in low wind, does not require a strong attachment. The screen is mounted on the roof of a building company and has shown its effectiveness.
Keywords: noise level, silencer, fan.
References
- Control of noise at work. Handbook / edited by dr. tehn. sciences, prof. E.Y. Yudin. – Moscow: Mashinostroyenie, 1985. – 393 p.
- Zarubin G.P., Nikitin D.P., Novikov Y.V. Environment and Health. – Moscow: Knowledge, 1972. – 210 p.
- Radnevo R.S. The study of infrasound in the habitat houses // Proceedings of the scientific-practical conference UNGZ MSU. – Kiev: 1999, № 2. – 112 p.
- Shandala M.G., Zvinyatskovskaya J.I. Environment and public health. – Kiev: Health, 1988. – 152 p.
- Medved R.A., Soloviev R.V. Production noise and the fight against it. – Gorkiy, 1977. – 340 p.
- Kucheryavy V.P. Urboekologiya. Vol. 1. – Lviv: Mir, 1999. – 359 p.
- Shterengarts G.Y. On the combined action of transport gases and noise // Hygiene and Occupational Diseases, 1984, № 5. – P. 40-42.
- Didkovskiy V.S., Akimenko V.Y., Zaporozhets O.I., Savin V.T., Tokarev V.I. Fundamentals of Acoustic Ecology. – Kirovograd: Printing Publishing Center Ltd. “Imex Ltd”, 2001. – 520 p.
- Khoroshev G.A., Petrov Y.I., Egorov N.F. Anti-noise fans. – Moscow: Energoizdat, 1981. – 143 p.
- Munin A.G., Kuznetsov V.M., Leontiev E.E. Aerodynamic noise sources. – Moscow: Mashinostroyenie, 1981. – 248 p.
- Faktorovich A.L., Postnikov G.I. Protection of cities from traffic noise. – Kiev: Budivelnik, 1982. – 140 p.
- Drahomanov B.H., Volinskiy A.A., Mіschenko A.V., Pismenniy E.M. Teplotehnіka. – Kiev: «Іnkos», 2005. – 504 p.
«Engineering industry and life safety» №3 (17), 2013. Pages: 21-26
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Shmandiy Vladimir Mikhaylovich – Professor, Kremenchug National University of Mikhail Ostrogradskiy, Kremenchug, Ukraine. E-mail: ecol@kdu.edu.ua
Kotenko Elena Olegovna – Graduate student, Kremenchug National University of Mikhail Ostrogradskiy, Kremenchug, Ukraine. E-mail: kotic7home@ukr.net
