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Medium No.	1245
Medium	Gluconacetobacter xylinus Medium
Composition
Glucose 100 g   Yeast extract 10 g   CaCO3 20 g   Agar (if needed) 15 g   Distilled water 1 L   Adjust pH to 6.8       20 g calcium carbonate in the medium serves as a buffer. The calcium carbonate will settle in agar plates before the agar has set, producing an opaque layer in the bottom. As the strain grows and acid is produced this will react with the calcium carbonate, causing it to dissolve and form zones of clearing immediately below the colonies.
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