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Main sol. J448

Internal Solution-ID: S4196

Equipment needed: Autoclave Filter
Compound Amount Unit Conc. [g/L] Conc. [mM]
Sea Salt
(Sigma)
30.00 g 3000 -
Mg(NO3)2 x 6 H2O 2.54 g 254 -
KH2PO4 0.30 g 30 220.449
NaHCO3 1.00 g 100 1190.38
MES 1.95 g 195 998.771
Sulfur
(powder)
12.00 g 1200 37418.1
Trace minerals 10.00 ml - -
Trace vitamins 0.50 ml - -
Na2S x 9 H2O 0.50 g 50 208.175
Resazurin 1.00 mg 0.1 0.436
1 Mix ingredients except sulfur, NaHCO3 and Na2S x 9H2O, adjust pH to 6.5 and autoclave. Filter-sterilize 8% NaHCO3 solution and add to the medium. Steam sulfur for 3 hr on each of 3 successive days. Separately autoclave 5% Na2S x 9H2O solution under a N2 atmosphere. Aseptically distribute the medium into culture vessels containing appropriate amount of sulfur (e.g., 20 ml culture medium in 120 ml serum bottle containing 0.24 g sulfur) under a H2-CO2 (4:1, v/v) gas mixture and seal with butyl rubber stoppers. Prior to inoculation, add the sterile Na2S x 9H2O solution and readjust pH to 6.5, if necessary. Pressurize the inoculated bottles to 200 kPa H2-CO2 (4:1, v/v).
J448 KA22 MEDIUM