TY JOUR TI Study of the heat treatment effect of medium-temperature electrode pitch on carbonisate yield KW p-toluidine KW maleic anhydride KW (2z)-4-(methylanilino)-4-oxobut-2-enoic acid KW IR and NMR1H- spectroscopy KW potentiometric titration KW metrological characteristics JO From Chemistry Towards Technology Step-By-Step AU Kovalev, R.Y. PY 2024 IS 5 PB Yaroslavl State Technical University