TY JOUR TI THE INFLUENCE OF TECHNOLOGICAL PROCESSING ON THE PERSISTENCE OF PECTIN SUBSTANCES OF VEGETABLE RAW MATERIALS KW plant-based materials KW sunflower hearts KW pectin substances KW pectinolytic enzymes KW processing procedure JO Bulletin of KSAU AU Sobol, I.V. PY 2019 IS PB Krasnoyarsk State Agrarian University