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Main sol. 797

Internal Solution-ID: S1626

Equipment needed: Hungate tubes Filter Gassing station Autoclave
Compound Amount Unit Conc. [g/L] Conc. [mM]
Ground beef
(fat free)
500.0 g 500 -
Distilled water 1000.0 ml - -
NaOH
(1 N)
25.0 ml - -
1 Mix meat, water and NaOH, and bring to a boil with stirring. Cool to room temperature, skim fat off surface, and filter, retaining both meat particles and filtrate. To the filtrate add sufficient distilled water to restore volume to 1000 ml. To this filtrate add:
Trypticase
(BBL 11921)
30.0 g 30 -
Yeast extract 5.0 g 5 -
K2HPO4 5.0 g 5 28.707
Resazurin
(0.025%)
4.0 ml 1.0e-3 0.004
Agar , if required 20.0 g 20 59.465
2 Boil and cool medium under 80% N2, 10% H2, 10% CO2, and add:
L-Cysteine HCl x H2O 0.5 g 0.5 2.847
Haemin solution 10.0 ml - -
Vitamin K1 solution 0.2 ml - -
3 Adjust medium for final pH 7.0. Anaerobically dispense 7 ml into tubes containing meat particles (use 1 part meat to 5 parts fluid) under the same gas phase.
797 MODIFIED CHOPPED MEAT MEDIUM