DSMZ 612 . DESULFOSARCINA CETONICA MEDIUM

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Equipment needed: Autoclave Gassing station Hungate tubes

Final gas composition: 80 % N2 20 % CO2 read more

Final pH: 7.2 - 7.4

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ml
Compound Amount Unit
Solution A 962 ml
Solution B 20 ml
Solution C 10 ml
Solution D 10 ml
1 Solution A is sparged with 80% N2 and 20% CO2 gas mixture to reach a pH below 6 (at least 30 min), then distributed under the same gas atmosphere into anoxic Hungate-type tubes or serum vials and autoclaved. Solution B is autoclaved separately under 80% N2 and 20% CO2 gas atmosphere. Solutions C and D are autoclaved under 100% N2 gas atmosphere. To complete the medium appropriate amounts of solutions B to D are added to the sterile solution A in the sequence as indicated. Final pH of the medium should be 7.2 – 7.4.

Solution A #

962
Compound Amount Unit
KH2PO4 0.70 g
NH4Cl 0.30 g
Na2SO4 2.80 g
MgCl2 x 6 H2O 1.70 g
CaCl2 x 2 H2O 0.05 g
NaCl 10.00 g
Trace element solution SL-10 1.00 ml
Sodium resazurin
(0.1% w/v)
0.50 ml
Distilled water 960.00 ml

Solution B #

20
Compound Amount Unit
Na2CO3 1 g
Distilled water 20 ml

Solution C #

10
Compound Amount Unit
Na-butyrate 1.2 g
Distilled water 10.0 ml

Solution D #

10
Compound Amount Unit
Na2S x 9 H2O 0.3 g
Distilled water 10.0 ml

Trace element solution SL-10 #

1000
Compound Amount Unit
HCl
(25%)
10.0 ml
FeCl2 x 4 H2O 1.5 g
ZnCl2 70.0 mg
MnCl2 x 4 H2O 100.0 mg
H3BO3 6.0 mg
CoCl2 x 6 H2O 190.0 mg
CuCl2 x 2 H2O 2.0 mg
NiCl2 x 6 H2O 24.0 mg
Na2MoO4 x 2 H2O 36.0 mg
Distilled water 990.0 ml
1 First dissolve FeCl2 in the HCl, then dilute in water, add and dissolve the other salts. Finally make up to 1000.00 ml.