| n° of sporesa | pHb |
---|
Water | 0 | 5.98 ± 0.08 |
Water + WT spores | 2.0 × 109 | 7.23 ± 0.07 |
| 1.0 × 1010 | 7.14 ± 0.24 |
Water + cotE spores | 2.0 × 109 | 6.06 ± 0.07 |
| 1.0 × 1010 | 6.18 ± 0.04 |
Water + cotH spores | 2.0 × 109 | 5.88 ± 0.07 |
| 1.0 × 1010 | 5.85 ± 0.07 |
- a The number of purified spores was measured by direct counting with a Burker chamber under an optical microscope (Olympus BH-2 with 40xlenses); b pH was measured using a pH-meter with a combined glass microelectrode (LLBiotrode, Metrohm) probe in a final volume of 200 μL.