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The bacteria were routinely cultivated at 58¡ãC at a pH of 7.0 ¡À 0.2 in a basal medium containing the following components (in grams per liter): NaCl (1.2), MgCl2 - 6H20 (0.4), KCI (0.3),CaCl2- 2H20 (0.15), NH4Cl (0.27), KH2PO4 (0.205), Na2SO4 (0.1), NaHCO3 (2.52), Na2S - 9H20 (0.15), yeast extract (0.025), Casamino Acids (0.025), and resazurin £¨0.001), as well as trace elements solution SI 6+ (35) (1 ml liter-1) and vitamin solution (19) (1 ml liter -'). The mineral medium was autoclaved under a gas phase of N2-C02 (80:20,vol/vol) or N2 (100%) with a bicarbonate buffer or a phosphate buffer, respectively. For growth under an atmosphere of 100% N2, NaHCO3 was added up to a concentration of 0.42 g liter-1 (5 mM). NaH2PO4 (2.06 g liter-') and Na2HPO4 (2.66 g liter-1) were used to buffer the medium at a neutral pH. The following stock solutions, aliquots of which were added aseptically to the mineral medium with plastic syringes, were sterilized separately: NaHCO3 (84 g liter-1), NaH2PO4 (68.6 g liter-'), Na2HPO4 (157.3 g liter-'), yeast extract (50 g liter-1), Casamino Acids (40 gliter-1) and vitamin solution. The vitamin solution and the trace elements solution were filter sterilized, and the other components were autoclaved for 20 min at 120¡ãC. Inulin was sterilized for 30 min at 110¡ãC to prevent decomposition. [ Last edited by Mally89 on 2011-5-22 at 16:02 ] |

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