TABLE 2.
Effect of increasing salt concentrations on the fructose (5 mM)-dependent product profiles of RD-1a
| Additional concn of NaCl and MgCl2, respectively (g liter−1) | Products
|
Acetate:fructose ratio | Recovery of reducing equivalents (%) | ||
|---|---|---|---|---|---|
| Acetate (mM) | Ethanol (mM) | H2 (mmol liter of culture fluid−1) | |||
| 0, 0 | 11.7 | 2.3 | 0.09 | 2.34 | 101 |
| 5, 0.05 | 11.3 | 2.4 | 0.11 | 2.26 | 99 |
| 10, 0.1 | 11.1 | 2.9 | 0.15 | 2.22 | 103 |
| 15, 0.15 | 9.9 | 3.2 | 0.13 | 1.98 | 98 |
| 20, 0.2 | 9.6 | 3.0 | 0.18 | 1.92 | 93 |
a
Fructose was totally consumed in all cultures. Lactate was not detected in any culture. Values were corrected with control values obtained from cultures lacking fructose and are means of three replicates. The standard deviations were less than 10%.