FIELD: biotechnologies. SUBSTANCE: birch tree sap is condensed and mixed with high-dispersion silicon dioxide (1.0-1.5 parts of silicon dioxide for 0 parts of concentrate). The mixture is kept to age for 17-24 h with stirring at regular intervals. EFFECT: higher product quality. 1 tbl
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Authors
Dates
1994-06-30—Published
1991-08-07—Filed