Table 3.
Results of the high-resolution XPS analysis of the C 1s, O 1s and N 1s peak region from cell surface
|
L-cysteine (g/l) |
C 1s (%) |
O 1s (%) |
N 1s (%) |
|||||
|---|---|---|---|---|---|---|---|---|
| |
CG1 284.8 eV |
CG2 286.2 eV |
CG3 287.8 eV |
CG4 289.2 eV |
OG1 531.3 eV |
OG2 532.7 eV |
NG1 399.1 eV |
NG2 400.05 eV |
| C-(C,H) | C-(O, N) | C=O, O-C-O | O=C-OH, O=C-OR | C=O | C-OH, C-O-C | O=C-NH-R | C-NH2 | |
| 0.0 |
69.55 |
20.17 |
6.89 |
3.38 |
48.09 |
51.91 |
99.36 |
0.64 |
| 0.5 |
68.79 |
20.03 |
6.95 |
4.23 |
38.47 |
61.53 |
86.19 |
13.81 |
| 1.0 |
57.10 |
27.18 |
13.73 |
1.98 |
24.98 |
75.02 |
76.20 |
23.80 |
| 1.5 | 59.38 | 27.45 | 9.78 | 3.39 | 70.64 | 29.36 | 83.57 | 16.43 |