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Main sol. 1455

Internal Solution-ID: S2989

Equipment needed: Filter Autoclave Hungate tubes Gassing station
Compound Amount Unit Conc. [g/L] Conc. [mM]
K2HPO4 0.23 g 0.229 1.313
KH2PO4 0.23 g 0.229 1.68
NaCl 0.45 g 0.447 7.654
(NH4)2SO4 0.45 g 0.447 3.385
CaCl2 x 2 H2O 0.06 g 0.06 0.406
MgSO4 x 7 H2O 0.09 g 0.089 0.363
Brain heart infusion
(BD BBL)
6.00 g 5.964 -
Yeast extract 5.00 g 4.97 -
Volatile fatty acid mixture 3.10 ml - -
Haemin solution
(0.05% w/v)
2.00 ml - -
Sodium resazurin
(0.1% w/v)
0.50 ml 5.0e-4 0.002
NaHCO3 6.40 g 6.362 75.73
Disodium succinate 5.00 g 4.97 30.671
Wolin's vitamin solution (10x) 1.00 ml - -
L-Cysteine HCl x H2O 0.30 g 0.298 1.698
Na2S x 9 H2O 0.30 g 0.298 1.242
Distilled water 1000.00 ml - -
1 Dissolve ingredients except bicarbonate, succinate, vitamins, cysteine and sulfide, then sparge medium with 100% CO2 gas for 30 - 45 min to make it anoxic. Add the bicarbonate and equilibrate the medium with the CO2 gas to reach a pH between 6.5 and 7.0. Dispense medium under 100% CO2 gas atmosphere into anoxic Hungate-type tubes or serum vials and autoclave. Add succinate, vitamins, cysteine and sulfide from sterile anoxic stock solutions prepared under 100% N2 gas. The vitamin solution should be sterilized by filtration. Prior to use adjust pH of complete medium to 6.6 - 6.8, if necessary.
1455 ALTERNATIVE RUMEN BACTERIA MEDIUM