Table 3.
Inactivation of microorganisms in contact with TiO2-coated aluminum plate.a
| Microorganisms | Inactivation |
|
|---|---|---|
| Darkb | UV-irradiatedc | |
| Bacteria (∼104 CFU ml−1) | ||
| Bacillus cereus | 3.9 | >99.9 |
| Bacillus subtilis | 8.7 | 99.4 |
| Escherichia coli | 15.0 | 99.9 |
| Neisseria sicca | 13.2 | 62.6 |
| Pseudomonas aeruginosa | – | 99.9 |
| Serratia marcescens | – | 98.8 |
| Staphylococcus epidermidis | 13.5 | 99.9 |
| Fungi (∼104 CFU ml−1) | ||
| Penicillum chrysogenum | 13.0 | 98.1 |
| Cladosporiun sp. | 23.6 | >99.9 |
| Aspergillus niger | – | 83.5 |
| Bacteria phage (∼103 CFU ml−1) | ||
| Bacteria phage T2 (DNA virus) | Nil | >99.9 |
a
Samples prepared from Paste A by screen-printing method.
b
The number of P. aeruginosa, S. marcescens and A. niger was higher than the control. No experiment was done on phages for coated sample in the dark.
c
The inactivation data were measured at a UV dosage of 5 J cm−2.