FIELD: chemistry.
SUBSTANCE: invention relates to biotechnology and can be used in industrial production of symbiotic preparations. Protective drying medium for obtaining symbiotic preparation contains gelatine, sucrose, food chitosan and potassium phosphate buffer in specified ratios.
EFFECT: invention makes it possible to reduce loss of concentration of viable Escherichia coli in the process of sublimation drying and increase duration of preservation of biological properties of symbiotic preparation to 12 months.
1 dwg, 3 tbl, 2 ex
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