%0 Journal Article %T RESEARCH OF THE PROCESS OF BIRCH WOOD IMPREGNATION WITH THE USED VEGETABLE OIL %K birch wood, processed vegetable oil, impregnation, modification, water absorption, swelling %J Forestry Engineering Journal %D 2020 %N 10 %P 7 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov