Figure 4. Normalized reflectance spectra for neat Sa (bottom),Se (center), and a mix of Sa:Se (top) deposited on an SS substrate. Tentative band assignments are included.
Some preliminary bands assignments summarized in Table 1, are identified in all bacteria, such as at 1642 - 1647 cm-1 Amide I, 1412 - 1422 cm-1 -C-C═O str (sym) of -COO, 1336 - 1344 cm-1, Amide III, 1247 cm-1-PO-PO–2 asymmetric (phosphate I) and 1028 - 1032 cm-1 Glycogen. Once the bands were assessed and identified, the data were analyzed using principal component analysis (PCA). Results obtained from the analysis are summarized in section 3.22 of this paper.
Table 1. QCL-GAP spectra proposed band assignments