Table 2 Elemental surface composition after contact of SiO2/Si substrates with aqueous laccase mixture suspension
Time in contact | [Si] (at %) | [O] (at %) | [C] (at %) | [N] (at %) | [Na] (at %) | [N]/[C] |
|---|---|---|---|---|---|---|
0 | 59.5 | 35.3 | 7.6 | 0.1 | 0 | 0.01 |
10 s | 56.7 | 32 | 10.7 | 0.6 | <0.1 | 0.06 |
1 min | 55.9 | 31.3 | 12.1 | 0.7 | <0.1 | 0.06 |
10 min | 51.8 | 31.6 | 15.4 | 1.1 | <0.1 | 0.07 |
1 h | 43.4 | 29.1 | 23.6 | 3 | 0.8 | 0.13 |
4 h | 38.8 | 28 | 28.4 | 3.8 | 1 | 0.14 |
Purified laccase powder | – | 22.4 | 65.0 | 11.3 | 0.3 | 0.20 |
Laccase-maltodextrin powder mixture | – | 27.3 | 66.5 | 5.4 | 0.3 | 0.08 |