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  • Title: [Effect of KH2PO4 on Streptococcus lactis growth and nisin synthesis when the medium is kept at a constant pH].
    Author: Kozlova IuI, Golikova TI, Baranova IP, Egorov NS.
    Journal: Mikrobiologiia; 1979; 48(3):443-6. PubMed ID: 38379.
    Abstract:
    When the pH of the medium was maintained at the level of 6.6--6.8 and the content of KH2PO4 in it was decreased, the biosynthetic activity of Streptococcus lactis, strain MGU, became lower. The culture assimilated low quantities of phosphorus from KH2PO4 at a high concentration of this salt in the medium; presumably, the culture required large quantities of potassium ions. If the pH of the medium is maintained at a constant value, the fermentation can be stopped 21 hr after the beginning of cultivation of Str. lactis, strain MGU.
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