TY JOUR TI pH-VALUE OF REACTION MEDIUM AS A FACTOR OF FOAM STRUCTURE FORMATION KW high-alkali medium KW different types of surfactants KW surface effects of foam formation JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Kozhuhova, N.I. AU Danakin, D.N. AU Kozhuhova, M.I. AU Alfimova, N.I. AU Chepurnyh, A.A. PY 2018 IS 3 PB Belgorod State Technological University named after V.G. Shukhov