COPPER(II)-CONTAINING CHITOSAN-BASED NON-TOXIC COMPOSITES STIMULATE KEFIR GRAIN BIOMASS PROPAGATION: COMBINED IN VITRO AND IN VIVO STUDIES СтатьяDysin A.P., Kirichuk A.A., Egorov A.R., Kozyrev V.A., Rubanik V.V., Rubanik V.V., Tskhovrebov A.G., Schaumlöffel Dirk, Kritchenkov A.S.Food Bioscience. Том 58. 2024. 103741 с.