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Main sol. 1297

Internal Solution-ID: S2595

Equipment needed: Autoclave Water bath Filter Hungate tubes Gassing station
Compound Amount Unit Conc. [g/L] Conc. [mM]
NaHCO3 25.00 g 24.925 296.704
Na2CO3 140.00 g 139.581 1316.95
NaCl 15.00 g 14.955 255.906
K2HPO4 1.00 g 0.997 5.724
NH4Cl 0.20 g 0.199 3.728
MgCl2 x 6 H2O 0.20 g 0.199 0.981
Yeast extract 0.20 g 0.199 -
Trace elements solution (Pfennig & Lippert,1966) 1.00 ml - -
Selenite-tungstate solution 1.00 ml - -
Glycerol 2.00 g 1.994 21.653
Wolin's vitamin solution (10x) 1.00 ml - -
Sulfur
(powdered)
2.00 g 1.994 62.177
Na2S x 9 H2O 0.25 g 0.249 1.038
Distilled water 1000.00 ml - -
1 Dissolve hydrogen carbonate, carbonate, sodium chloride, and hydrogen phosphate, then sparge medium with 100% N2 gas for 30 - 45 min to make it anoxic. Dispense solution under the same gas atmosphere into anoxic Hungate-type tubes or serum vials and autoclave. After sterilization add ammonium chloride, magnesium chloride, yeast extract, trace elements, glycerol, vitamins, and sulfide from a sterile anoxic stock solution prepared under 100% N2 gas. The vitamin solution should be sterilized by filtration. Sulfur is sterilized by steaming for 3 hours on each of 3 successive days (see medium 35) and added aseptically to the sterile medium as powder while retaining anoxic conditions. Adjust the pH of the complete medium to 9.8 - 10.0, if necessary.
1297 NATRONIELLA SULFIDIGENA MEDIUM