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Main sol. 124

Internal Solution-ID: S222

Equipment needed: Hungate tubes Filter Autoclave Gassing station
Compound Amount Unit Conc. [g/L] Conc. [mM]
NaCl 1.17 g 1.167 19.961
MgCl2 x 6 H2O 0.40 g 0.399 1.962
KCl 0.30 g 0.299 4.012
CaCl2 x 2 H2O 0.15 g 0.15 1.017
NH4Cl 0.27 g 0.269 5.033
KH2PO4 0.20 g 0.199 1.465
Na2SO4 2.84 g 2.832 19.935
Trace element solution SL-10 1.00 ml - -
Selenite-tungstate solution 1.00 ml - -
Yeast extract 1.00 g 0.997 -
Sodium resazurin
(0.1% w/v)
0.50 ml 5.0e-4 0.002
NaHCO3 4.50 g 4.487 53.407
Na-acetate 1.40 g 1.396 17.015
Na-butyrate 1.40 g 1.396 12.679
Wolin's vitamin solution (10x) 1.00 ml - -
Na2S x 9 H2O 0.40 g 0.399 1.66
Distilled water 1000.00 ml - -
1 Dissolve ingredients (except bicarbonate, acetate, butyrate, vitamins, and sulfide) and sparge medium with 80% N2 and 20% CO2 gas mixture for 30 - 45 min to make it anoxic. Add and dissolve bicarbonate, adjust pH to 7.0, then dispense medium under 80% N2 and 20% CO2 gas atmosphere into anoxic Hungate-type tubes or serum vials and autoclave. Add acetate, butyrate, vitamins, and sulfide from sterile anoxic stock solutions prepared under 100% N2 gas. The vitamin solution should be sterilized by filtration. Before use, check the complete medium's pH and adjust it to 7.0 - 7.2, if necessary.
124 DESULFOFARCIMEN MEDIUM