FIELD: medicine, veterinary science, pharmaceutical, perfume and food industry. SUBSTANCE: sapropel with content of organic matter 45-90% is used. 1,2-Propylene glycol or its aqueous solutions are used as an extractant. Extraction is carried out at pH = 5-9, t = 20-130 C and in the volume ratio sapropel to extractant = 1 : (0.1-15) vol. p. p. up to preparing substance with content of total nitrogen 400-700 mg/l and amine nitrogen 80-120 mg/l. EFFECT: simplified process, enhanced biological activity of product. 4 cl
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