NEW POSSIBILITIES OF LOW-TEMPERATURE GENERATION OF ACTIVE CENTERS DURING HETEROGENEOUS-HOMOGENEOUS ACTIVATION OF PROPANE ON SILICA GEL SURFACE, MODIFIED WITH ZnO BY THE SOL-GEL AND CHEMICAL TRANSPORT REACTION METHODS. Proc. YSU B: Chem. Biol. Sci. 2021, 55 (1 (254), 1-6. https://doi.org/10.46991/PYSU:B/2021.55.1.001.