Na2SO4 0.02 g KH2PO4 1.00 g NH4Cl 0.25 g NaCl 20.00 g MgCl2 x 6 H2O 3.00 g KCl 0.50 g CaCl2 x 2 H2O 0.15 g Na-acetate 1.64 g Trace element solution SL-10 1.00 ml Selenite-tungstate solution 1.00 ml Sodium resazurin (0.1% w/v) 0.50 ml Na2CO3 1.00 g Na2-fumarate 6.40 g Seven vitamins solution 1.00 ml Na2S x 9 H2O 0.50 g Distilled water 1000.00 ml Dissolve all ingredients except carbonate, fumarate, vitamins and sulfide, then sparge medium with 80% N2 and 20% CO2 gas mixture for 30 - 45 min to make it anoxic. Dispense medium under same gas atmosphere into anoxic Hungate-type tubes or serum vials and autoclave. Add fumarate, vitamins and sulfide from sterile anoxic stock solutions prepared under 100% N2 gas and carbonate from a sterile anoxic stock solution prepared under 80% N2 and 20% CO2 gas atmosphere. Vitamins should be sterilized by filtration. Adjust pH of complete medium to 7.0 - 7.2, if necessary. Trace element solution SL-10 (from medium 320) HCl (25%) 10.00 ml FeCl2 x 4 H2O 1.50 g ZnCl2 70.00 mg MnCl2 x 4 H2O 100.00 mg H3BO3 6.00 mg CoCl2 x 6 H2O 190.00 mg CuCl2 x 2 H2O 2.00 mg NiCl2 x 6 H2O 24.00 mg Na2MoO4 x 2 H2O 36.00 mg Distilled water 990.00 ml First dissolve FeCl2 in the HCl, then dilute in water, add and dissolve the other salts. Finally make up to 1000.00 ml. Selenite-tungstate solution (from medium 385) NaOH 0.50 g Na2SeO3 x 5 H2O 3.00 mg Na2WO4 x 2 H2O 4.00 mg Distilled water 1000.00 ml Seven vitamins solution (from medium 503) Vitamin B12 100.00 mg p-Aminobenzoic acid 80.00 mg D-(+)-biotin 20.00 mg Nicotinic acid 200.00 mg Calcium pantothenate 100.00 mg Pyridoxine hydrochloride 300.00 mg Thiamine-HCl x 2 H2O 200.00 mg Distilled water 1000.00 ml
