TY JOUR TI INVESTIGATION OF TEMPERATURE AND SPECTRAL CHANGES OF SUBSTANCES TREATED IN THE REACTION CHAMBER OF A MICROWAVE PLASMATRON KW environmental safety KW energy-saving technologies KW temperatures and spectra of substances processed in the reaction chamber KW microwave plasmatron KW spectrometer KW plasma state KW processing of non-metallic materials in solid and liquid state KW heat treatment JO Problems of risk management in the technosphere AU Samsaliev, A.A. PY 2023 IS 2023 PB Saint-Petersburg University of State Fire Service of Emercom of Russia