DSMZ 795 . STETTERIA MEDIUM

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Equipment needed: Gassing station Serum bottle Water bath

Final gas composition: 53 % H2 27 % N2 20 % CO2 read more

Final pH: 6.0

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ml
Compound Amount Unit
Synthetic seawater (2 x conc.) 500.00 ml
NaHCO3 0.16 g
KH2PO4 0.50 g
Modified Wolin's mineral solution 15.00 ml
NiCl2 x 6 H2O
(0.1% w/v)
3.00 ml
Peptone
(BD Bacto)
2.00 g
Yeast extract
(OXOID)
1.00 g
Sodium resazurin
(0.1% w/v)
0.50 ml
Sulfur , powdered
(powdered)
10.00 g
Na2S x 9 H2O 0.50 g
Distilled water 500.00 ml
1 Dissolve ingredients except sulfur and sulfide, then sparge medium with 80% N2 and 20% CO2 gas mixture for 30 - 45 min to make it anoxic. Dispense medium under same gas atmosphere into serum vials (e.g., 20 ml medium per 100 ml bottle) that contain already the appropriate amount of sulfur. After closing pressurize bottles to 2 bar overpressure using 80% H2 and 20% CO2 gas mixture, than heat at 100°C for 1.5 hours on each of 3 successive days. Before use add sulfide from a sterile anoxic stock solution prepared under 100% N2 gas atmosphere. Adjust pH of complete medium to 6.0, if necessary. Incubate without shaking.

Modified Wolin's mineral solution #

1000
Compound Amount Unit
Nitrilotriacetic acid 1.50 g
MgSO4 x 7 H2O 3.00 g
MnSO4 x H2O 0.50 g
NaCl 1.00 g
FeSO4 x 7 H2O 0.10 g
CoSO4 x 7 H2O 0.18 g
CaCl2 x 2 H2O 0.10 g
ZnSO4 x 7 H2O 0.18 g
CuSO4 x 5 H2O 0.01 g
AlK(SO4)2 x 12 H2O 0.02 g
H3BO3 0.01 g
Na2MoO4 x 2 H2O 0.01 g
NiCl2 x 6 H2O 0.03 g
Na2SeO3 x 5 H2O 0.30 mg
Na2WO4 x 2 H2O 0.40 mg
Distilled water 1000.00 ml
1 First dissolve nitrilotriacetic acid and adjust pH to 6.5 with KOH, then add minerals. Adjust final to pH 7.0 with KOH.

Synthetic seawater (2 x conc.) #

1000
Compound Amount Unit
NaCl 55.40 g
SrCl2 x 6 H2O 0.03 g
MgSO4 x 7 H2O 14.00 g
KI 0.10 mg
MgCl2 x 6 H2O 11.00 g
Na3-citrate 20.00 mg
KCl 1.30 g
CaCl2 x 2 H2O 1.50 g
NaBr 0.20 g
H3BO3 0.06 g
Distilled water 1000.00 ml