DSMZ 1230 . THIOALKALIMICROBIUM MICROAEOPHILUM MEDIUM

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Equipment needed:

Final pH: 9.0 - 9.5

Select a strain (optional):

ml
Compound Amount Unit
NaCl 6.0 g
K2HPO4 2.0 g
NaHCO3 40.0 g
KNO3 0.5 g
Distilled water 1000.0 ml
1 Adjust the pH to 9.0 - 9.5 with 2M KOH. Dispense into closed vessels (i.e. a serum tube or bottle) with a liquid to air ratio of about 1:10. Flush the gas phase with nitrogen and add 2% oxygen. Sterilize at 120°C 20 min.
2 After sterilization add from sterile stock solutions:
Trace element solution 1.0 ml
MgCl2 x 6 H2O
(200.0 g/l)
1.0 ml
3 (a white colloid will form which will rapidly dissolve after mixing)
Sodium thiosulfate pentahydrate
(4 M - 992 g/l)
5.0 ml
4 Incubate statically until growth occurs, then shake at 100 rpm.

Trace element solution #

1000
Compound Amount Unit
EDTA 5 mg
FeSO4 x 7 H2O 2 mg
ZnSO4 x 7 H2O 100 mg
MnCl2 x 4 H2O 30 mg
CoCl2 x 6 H2O 200 mg
NiCl2 x 6 H2O 20 mg
Na2MoO4 x 2 H2O 30 mg
CuCl2 x 2 H2O 10 mg
H3BO3 300 mg
Distilled water 1000 ml
1 Final pH should be 3, add HCl if needed. Sterilization - 120°C 20 min.