| Samples with plasma treatment | ||
| BP11 | Ar + N2 | BP + PL + Z |
| BP16 | Ar + H2O | BP + PL + Z |
| BP7 | Ar + O2 | BP + PL + Z |
| TC6 | Ar | TC + PL |
| TC9 | Ar + O2 | TC + PL |
| Z12 | Ar + N2 | Z + PL + TC |