830d .
R2A MEDIUM (MICROAEROBIC)
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Equipment needed:
Autoclave
Gassing station
Final pH:
5.0 - 5.5
Select a strain (optional):
ml
| Compound | Amount | Unit | |||
|---|---|---|---|---|---|
|
|
Yeast extract | 0.50 | g | ||
|
|
Proteose peptone
(BD DIFCO no. 3) |
0.50 | g | ||
|
|
Casamino acids | 0.50 | g | ||
|
|
Glucose | 0.50 | g | ||
|
|
Starch , soluble | 0.50 | g | ||
|
|
Na-pyruvate | 0.30 | g | ||
|
|
K2HPO4 | 0.30 | g | ||
|
|
MgSO4 x 7 H2O | 0.05 | g | ||
|
|
Distilled water | 1000.00 | ml | ||
| 1 Dissolve ingredients, then sparge solution with 80% N2 and 20% CO2 gas mixture for at least 30 - 45 min to remove dissolved oxygen and to saturate the solution with CO2. Dispense solution in vials suitable for anaerobic cultures (e.g. Balch-type tubes or serum vials) to 75% volume under air atmosphere. Close vials with butyl rubber septa to prevent free exchange of oxygen with the external atmosphere and autoclave. Adjust pH of the autoclaved medium to 5.0 - 5.5 using a sterile stock solution of sodium carbonate (5% w/v), prepared under 80% N2 and 20% CO2 gas mixture. | |||||