TY JOUR TI DETERMINATION OF THE LIMITING ACTIVITY COEFFICIENTS OF 2-METHYLPROPENE AND BUTADIENE-1,3 BY THE METHOD OF GAS-LIQUID CHROMATOGRAPHY KW gas-liquid chromatography KW butadiene-1,3 JO Modern Technologies and Scientific and Technological Progress AU Ul'yanov, B.A. AU Nemcov, A.S. PY 2022 IS 2022 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»