TY CONF TI EFFECT OF ENZYME USE ON PHYSICOMECHANICAL AND OPTICAL PROPERTIES OF SECONDARY FIBERS KW secondary fibers KW enzymes KW paper mass KW optical parameters KW physical and mechanical parameters JO ENERGY-SAVING AND ENVIRONMENTALLY SAFE TECHNOLOGIES OF THE TIMBER INDUSTRY – 2025 AU Midukova, M.A. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov