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Main sol. J347

Internal Solution-ID: S4067

Equipment needed: Autoclave
Compound Amount Unit Conc. [g/L] Conc. [mM]
Synthetic seawater (2 x)
(2 x)
500.0 ml - -
KH2PO4 1.0 g 1 7.348
(NH4)2SO4 0.5 g 0.5 3.784
Yeast extract
(BD-Difco)
0.4 g 0.4 -
Sulfur
(powder)
10.0 g 10 311.818
Resazurin 1.0 mg 1.0e-3 0.004
Na2S x 9 H2O 0.5 g 0.5 2.082
Distilled water 500.0 ml - -
1 Mix ingredients, except yeast extract, sulfur and Na2S x 9H2O, and autoclave. Separately autoclave 10% (w/v) yeast extract solution, and 5% Na2S x 9H2O solution under a N2 atmosphere. Steam sulfur for 3 hr on each of 3 successive days. Distribute the medium into culture vessels (e.g., 20 ml of the medium in 120 ml serum bottles) containing sulfur under a stream of H2-CO2 (4:1, v/v) gas mixture, add the yeast extract solution, and seal with butyl rubber stoppers. Prior to inoculation, add the sterile Na2S x 9H2O solution, and adjust pH to 5.5 with sterile 1 N H2SO4. Pressurize the inoculated bottles to 200 kPa H2-CO2 (4:1, v/v) gas mixture.
J347 SME MEDIUM