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Main sol. 1092

Internal Solution-ID: S2199

Equipment needed: Filter Autoclave Gassing station
Compound Amount Unit Conc. [g/L] Conc. [mM]
Sea Salt
(SIGMA)
30.0 g 29.91 -
Wolfe's mineral elixir 1.0 ml - -
Sodium resazurin
(0.1% w/v)
0.5 ml 5.0e-4 0.002
Sulfur
(powdered)
3.0 g 2.991 93.266
NaHCO3 2.5 g 2.493 29.67
Yeast extract 2.0 g 1.994 -
Wolin's vitamin solution (10x) 2.0 ml - -
Na2S x 9 H2O 0.5 g 0.499 2.076
Distilled water 1000.0 ml - -
1 Dissolve ingredients (except sulfur, bicarbonate, yeast extract, vitamins and sulfide) and sparge medium with 80% H2 and 20% CO2 gas mixture for 30 - 45 min to make it anoxic. Dispense medium under same gas atmosphere into anoxic serum vials (e.g., Balch-type tubes) containing already the appropriate amount of sulfur, only to 30% of their volume to allow for a large headspace. Autoclave at 110°C for 20 min. Add yeast extract, vitamins and sulfide form sterile anoxic stock solutions prepared under 100% N2 gas and bicarbonate from a sterile anoxic stock solution prepared under 80% N2 and 20% CO2 gas mixture. The vitamin solution should be sterilized by filtration. Adjust pH of the complete medium to 7.0-7.2.
2 After inoculation pressurize vessels with sterile 80% H2 and 20% CO2 gas mixture to 2 bar overpressure.
1092 THERMOSULFIDIBACTER MEDIUM