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Table 3 Results of the high-resolution XPS analysis of the C 1s, O 1s and N 1s peak region from cell surface

From: Photo-fermentative bacteria aggregation triggered by L-cysteine during hydrogen production

L-cysteine (g/l) C 1s (%) O 1s (%) N 1s (%)
  CG1284.8 eV CG2286.2 eV CG3287.8 eV CG4289.2 eV OG1531.3 eV OG2532.7 eV NG1399.1 eV NG2400.05 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