TY JOUR TI SCIENTIFIC BASIS FOR MODIFICATION OF FIRE EXTINGUISHING AND PROTECTIVE COMPOSITIONS FOR OIL AND GAS FACILITIES KW carbon nanostructures KW fire extinguishing KW fire protection efficiency KW foam coke KW feasibility study KW nanomodification KW astralenes JO Problems of risk management in the technosphere AU Ivanov, A.V. PY 2026 IS 2025 PB Saint-Petersburg University of State Fire Service of Emercom of Russia