1
Add and dissolve ingredients of solution A, adjust pH to 7.2 and sparge medium with 80% N2 and 20% CO2 gas mixture for 30 - 45 min to make it anoxic. Dispense medium under the same gas atmosphere into anoxic Hungate-type tubes and autoclave. Solution B is prepared under 80% N2 and 20% CO2 gas atmosphere and autoclaved. Solution C is prepared under 100% N2 gas and sterilized by filtration. Solutions D, E and F are autoclaved under 100% N2 gas atmosphere. To complete the medium appropriate amounts of solutions B to F are added to the sterile solution A in in the sequence as indicated.
2
Note: Some cultures are shipped in semi-solid medium which stimulates growth at the beginning. For agar stabs 3.00 g/l agar are added to the complete medium from a sterile anoxic stock solution (2% w/v). Upon receipt add anoxically 1 - 2 ml of the recommended freshly prepared liquid medium to the agar tube and incubate for 3 - 5 days . After incubation transfer 0.5 ml of the resulting cell suspension in the liquid phase to tubes with liquid medium.
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