Medium data

Search for medium no. = [844].
Unless otherwise stated, sterilize media by autoclaving at 121°C for 15 min.

844   RSULFAC1 MEDIUM

KH2PO4  0.3     g
K2HPO4  0.3     g
NH4Cl  1.0     g
NaCl  5.0     g
KCl  0.1     g
CaCl2·2H2O  0.1     g
MgCl2·6H2O  0.5     g
Trace element solution (see Medium No. 439)  10.0     ml
Yeast extract  1.0     g
Peptone  2.0     g
L-Cysteine·HCl·H2O  0.5     g
Sulfur (powder)  10.0     g
Resazurin  1.0     mg
Distilled water  1.0     L
Mix components except sulfur thoroughly and autoclave under a N2-CO2 (4:1, v/v) gas mixture. After cooling, add per liter the following solutions (autoclaved or *filter-sterilized):
8% NaHCO3 solution*  25.0     ml
1.0 M Sodium fumarate solution  20.0     ml
Steam sulfur for 3 hr on each of 3 successive days. Aseptically distribute the medium and sulfur into culture vessels under a stream of N2-CO2 (4:1, v/v) and seal with butyl rubber stoppers. Prior to inoculation, add per liter the following solution from an anaerobic stock (autoclaved and stored under a N2 atmosphere):
5% Na2S·9H2O solution  8.0     ml



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