TY JOUR TI COMPARISON OF EFFICIENCY OF NATURAL AND SYNTHETIC IMPREGNATING COMPOSITIONS FOR BIRCH WOOD KW древесина KW пропитка KW гидрофобизация KW антисептирование KW отходы KW растительные масла KW моторное масло JO Actual directions of scientific researches of the XXI century: theory and practice AU Belchinskaya, L.I. AU Dmitrenkov, A.I. AU Zhuzhukin, K.V. PY 2020 IS 8 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov