DSMZ 1049 . SELENATE REDUCER MEDIUM

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Equipment needed: Filter

Final pH: 7.0

Select a strain (optional):

ml
Compound Amount Unit
Solution A 100.0 ml
Solution B 1.0 ml
Solution C 2.5 ml
Solution D 1.0 ml
Solution E 0.1 ml
Solution F 0.5 ml
Solution G 1.0 ml
Solution H 1.0 ml
1 After cooling of medium A, add per 100 ml: 1.0 ml solution B, 2.5 ml solution C, 1.0 ml solution D, 0.1 ml solution E, 0.5 ml solution F, 1.0 ml solution G and 1.0 ml solution H.
2 Adjust pH to 7.0.
3 It is recommended to cultivate strain DSM 17993 on agar plates which may be prepared under aerobic conditions. Plates are then preincubated under anaerobic conditions prior to inoculation. They will stay pink coloured.
4 For liquid medium, prepare solution A, distribute to anaerobic cultivation vessels, heat to the boil and cool to room temperature while gassing with N2 : CO2 (80:20). Close vessels and autoclave. Prepare solutions B, C, D, E and H under anaerobic conditions and autoclave. Solutions F and H are filter sterilized and flushed with N2. Selenate (solution B) might be replaced by nitrate (solution: 1.00 g KNO3 in 10 ml).

Solution A #

940
Compound Amount Unit
DL-Na-lactate 1.12 g
KCl 1.30 g
KH2PO4 0.20 g
NaCl 23.00 g
NH4Cl 0.50 g
CaCl2 x 2 H2O 0.10 g
MgCl2 x 6 H2O 3.00 g
Resazurin 0.50 mg
Agar 15.00 g
Distilled water 940.00 ml

Solution B #

10
Compound Amount Unit
Na2SeO4 1.89 g
Distilled water 10.00 ml

Solution C #

10
Compound Amount Unit
NaHCO3 1 g
Distilled water 10 ml

Solution D #

10
Compound Amount Unit
Na2S x 9 H2O 0.1 g
Distilled water 10.0 ml

Solution E #

100
Compound Amount Unit
Na2SeO3 3 mg
Na2WO4 8 mg
Distilled water 100 ml

Solution F #

100
Compound Amount Unit
Vitamin solution 1 ml

Solution G #

10
Compound Amount Unit
Trace element solution SL-10 1 ml
Distilled water 9 ml

Solution H #

100
Compound Amount Unit
1,4-Naphthoquinone 2.0 mg
Hemin 0.5 mg
Distilled water 100.0 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.

Vitamin solution #

1000
Compound Amount Unit
Vitamin B12 50 mg
Pantothenic acid 50 mg
Riboflavin 50 mg
Pyridoxamine hydrochloride 10 mg
Biotin 20 mg
Folic acid 20 mg
Nicotinic acid 25 mg
Nicotine amide 25 mg
alpha-lipoic acid 50 mg
p-Aminobenzoic acid 50 mg
Thiamine-HCl x 2 H2O 50 mg
Distilled water 1000 ml
1 Stir for some hours, filter sterilize the solution.