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Main sol. 815

Internal Solution-ID: S1654

Equipment needed: Autoclave Hungate tubes Gassing station
Compound Amount Unit Conc. [g/L] Conc. [mM]
Na2SO4 3.0 g 3 21.121
CaCl2 x 2 H2O 6.0 g 6 40.812
NaCl 40.0 g 40 684.463
KCl 2.0 g 2 26.828
NH4Cl 0.3 g 0.3 5.609
KH2PO4 0.2 g 0.2 1.47
MgCl2 x 6 H2O 8.0 g 8 39.35
SrCl2 x 6 H2O 0.1 g 0.1 0.375
Trace element solution SL-11 1.0 ml - -
MOPS 3.0 g 3 14.336
Yeast extract 1.0 g 1 -
Sodium resazurin
(0.1% w/v)
0.5 ml 5.0e-4 -
Iron powder
(or nails)
100.0 g 100 1790.67
Na-L-lactate 3.6 g 3.6 -
Na2CO3 0.5 g 0.5 4.718
Distilled water 1000.0 ml - -
1 Dissolve ingredients except iron, lactate and carbonate, adjust pH to 6.0 with NaOH and sparge medium with 100% N2 gas for 30 - 45 min to make it anoxic. Dispense medium under same gas atmosphere into anoxic Hungate-type tubes or serum vials containing 1 - 2 g iron powder or an iron nail. Autoclave for 30 min at 105°C. Before use add lactate from a sterile anoxic stock solutions prepared under 100% N2 gas and carbonate from a sterile anoxic stock solution prepared under 80% N2 and 20% CO2 gas atmosphere. Final medium pH should be 7.2.
815 DESULFOHALOTOMACULUM MEDIUM