Table 2 Microbial killing effects of inorganic materials under combined treatment conditions of different pressures and vacuums
Group | Control | ZnO | Na2B8O13﹒4H2O | Pb3O4 | |||||
|---|---|---|---|---|---|---|---|---|---|
0.01 Mpa | 0.05 Mpa | 0.01 Mpa | 0.05 Mpa | 0.01 Mpa | 0.05 Mpa | 0.01 Mpa | 0.05 Mpa | ||
Day1 | Live | 20 | 20 | 20 | 20 | 19 | 18 | 20 | 20 |
Dead | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | |
Mortality rate | 0% | 0% | 0% | 0% | 5% | 10% | 0% | 0% | |
Day2 | Live | 20 | 20 | 20 | 20 | 17 | 18 | 19 | 18 |
Dead | 0 | 0 | 0 | 0 | 3 | 2 | 1 | 2 | |
Mortality rate | 0% | 0% | 0% | 0% | 15% | 10% | 5% | 10% | |
Day3 | Live | 19 | 20 | 17 | 18 | 16 | 16 | 18 | 17 |
Dead | 1 | 0 | 3 | 2 | 4 | 4 | 2 | 3 | |
Mortality rate | 5% | 0% | 15% | 10% | 20% | 20% | 10% | 15% | |
Day4 | Live | 18 | 18 | 13 | 13 | 14 | 13 | 14 | 15 |
Dead | 2 | 2 | 7 | 7 | 6 | 7 | 6 | 5 | |
Mortality rate | 10% | 10% | 35% | 43% | 30% | 43% | 30% | 25% | |
Day5 | Live | 17 | 14 | 8 | 7 | 10 | 9 | 5 | 9 |
Dead | 3 | 6 | 12 | 13 | 10 | 11 | 15 | 11 | |
Mortality rate | 18% | 30% | 60% | 65% | 50% | 55% | 75% | 55% | |
Day6 | Live | 16 | 14 | 4 | 2 | 4 | 2 | 4 | 4 |
Dead | 4 | 6 | 16 | 18 | 16 | 18 | 16 | 16 | |
Mortality rate | 20% | 30% | 80% | 90% | 80% | 90% | 80% | 80% | |
Day7 | Live | 10 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
Dead | 10 | 18 | 20 | 20 | 20 | 20 | 20 | 20 | |
Mortality rate | 50% | 90% | 100% | 100% | 100% | 100% | 100% | 100% | |
