FIELD: medicine, pharmacy. SUBSTANCE: oak bark is extracted with distilled water at ratio = 1:(12-15) weight p. p. threefold at 70-80 C. The first extraction is carried out for 2 h and the following ones - for 1 h. Volume extracts were separated, evaporated to 1/3, separated repeatedly and dried by spraying. The end product is well water-soluble powder containing 47.5% tanning substances, trace elements, aldehydes, ketones, flavanoids. EFFECT: simplified method, constant composition of the end product.
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Authors
Dates
1997-10-10—Published
1992-11-03—Filed