1. Department of Physics, Educational and Research Institute of oil, gas and nature engineering, Poltava National Technical Yuri Kondratyuk University, Poltava 36000, Ukraine;
2. Department of applied ecology and nature management, Educational and Research Institute of oil, gas and nature engineering, Poltava National Technical Yuri Kondratyuk University, Poltava 36000, Ukraine;
3. Department of applied ecology and nature management, Poltava National Technical Yuri Kondratyuk University, Poltava 36000, Ukraine