TY JOUR TI THE EFFECTIVENESS OF FLAME RETARDANT IMPREGNATING COMPOUNDS FOR WOODEN STRUCTURES KW flame retardants KW flame retardant efficiency KW wood KW wooden structures KW fire resistance KW fire hazard KW charring KW oxidation KW flameless (smoldering) combustion KW coke formation KW catalytic dehydration JO Problems of risk management in the technosphere AU Fedotov, I.O. AU Sivenkov, A.B. AU Naganovsky, Y.K. PY 2023 IS 2023 PB Saint-Petersburg University of State Fire Service of Emercom of Russia