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Selective method for obtaining concentrates from feldspathic pegmatites

✍ Scribed by S. A. Shelkova; A. M. Egorov; E. B. Repina; N. I. Gerasimova

Publisher
Springer US
Year
1979
Tongue
English
Weight
188 KB
Volume
36
Category
Article
ISSN
0361-7610

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Crude lactase (Ξ²-galactosidase) preparations of Penicillium notatum 1 were obtained from the culture supernate by means of concentration under reduced pressure, freeze-drying, fractional precipitation with alcohols (methanol, ethanol, propanol, isopropanol) and acetone, ammonium sulfate salting out,