Research activation energy in thermal modification of wood Yuriy Tsapko, Olga Bondarenko, Oleksandra Horbachova, Serhii Mazurchuk and Nataliya Buyskikh E3S Web Conf., 280 (2021) 07009 Published online: 30 June 2021 DOI: 10.1051/e3sconf/202128007009