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Main sol. 479b

Internal Solution-ID: S6395

Equipment needed: Autoclave Hungate tubes Gassing station
Compound Amount Unit Conc. [g/L] Conc. [mM]
NaCl 50.00 g 49.505 847.107
KCl 1.50 g 1.485 19.922
MgCl2 x 6 H2O 6.00 g 5.941 29.22
CaCl2 x 2 H2O 0.40 g 0.396 2.694
NH4Cl 1.00 g 0.99 18.51
K2HPO4 x 3 H2O 0.40 g 0.396 2.274
Modified Wolin's mineral solution 10.00 ml - -
Yeast extract
(OXOID)
2.00 g 1.98 -
Trypticase peptone
(BD BBL)
2.00 g 1.98 -
Sodium resazurin
(0.1% w/v)
0.50 ml 5.0e-4 0.002
Na2S x 9 H2O 0.25 g 0.248 1.031
Distilled water 1000.00 ml - -
1 Dissolve ingredients except sulfide. Sparge medium with 100% N2 gas atmosphere for 30 - 45 min to make it anoxic, then adjust pH to 7.5 - 8.0 with NaOH and dispense medium under same gas atmosphere into anoxic Hungate-type tubes or serum vials. After autoclaving, add sulfide from a sterile anoxic stock solution prepared under 100% N2 gas. Adjust the pH of the complete medium to 8.0, if necessary.