88b .
V24N MEDIUM
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Equipment needed:
Autoclave
Final gas composition:
100 % N2
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Final pH:
6.0
Select a strain (optional):
ml
| 1 Prepare medium , then add (per litre): | |||||
| Compound | Amount | Unit | |||
|---|---|---|---|---|---|
|
|
(NH4)2SO4 | 1.30 | g | ||
|
|
KH2PO4 | 0.28 | g | ||
|
|
MgSO4 x 7 H2O | 0.25 | g | ||
|
|
CaCl2 x 2 H2O | 0.07 | g | ||
|
|
FeCl3 x 6 H2O | 0.02 | g | ||
|
|
Allen's trace element solution | 10.00 | ml | ||
|
|
Distilled water | 1000.00 | ml | ||
|
|
Sulfur
, powdered
(powdered) |
1.00 | g | ||
|
|
Yeast extract | 0.20 | g | ||
|
|
Starch
, soluble
(soluble) |
2.00 | g | ||
|
|
Resazurin | 0.40 | mg | ||
|
|
Na2S x 9 H2O | 0.50 | g | ||
| 2 Adjust the pH to 6.0 with H2SO4 (25% v/v). Prepare the medium under 100% N2 gas phase and distribute anaerobically into rubber stoppered tubes or bottles (presterilized by autoclaving). The medium is sterilized by heating 2 hours at 85 °C on each of two following days. | |||||
Allen's trace element solution #
1000
| Compound | Amount | Unit | |||
|---|---|---|---|---|---|
|
|
MnCl2 x 4 H2O | 180 | mg | ||
|
|
Na2B4O7 x 10 H2O | 450 | mg | ||
|
|
ZnSO4 x 7 H2O | 22 | mg | ||
|
|
CuCl2 x 2 H2O | 5 | mg | ||
|
|
Na2MoO4 x 2 H2O | 3 | mg | ||
|
|
VOSO4 x 2 H2O | 3 | mg | ||
|
|
CoSO4 x 7 H2O | 1 | mg | ||
|
|
Distilled water | 1000 | ml | ||
| 1 Adjust pH of final solution to 2 with 1 N HCl. | |||||