Table 2.
Selected wavenumbers by the SPA-SVM to distinguish healthy controls and breast cancer samples.
| Selected wavenumber (cm−1) | Tentative assignment |
|---|---|
| 901 | Phosphodiester (absorbances due to collagen and glycogen) |
| 959 | Symmetric stretching vibration of n1PO4 |
| 980 | OCH3 (polysaccharides) |
| 999 | Ring stretching vibrations mixed strongly with CH in plane bending |
| 1,018 | n(CO), n(CC), d(OCH), ring (polysaccharides, pectin) |
| 1,277 | Vibrational modes of collagen |
| 1,311 | Amide III band components of proteins |
| 1,364 | Stretching C–O, deformation C–H, deformation N–H |
| 1,402 | Symmetric CH3 bending modes of the methyl groups of proteins |
| 1,464 | CH2 scissoring mode of the acyl chain of lipid |
| 1,489 | In-plane CH bending vibration |
| 1582 | Ring C–C stretch of phenyl |
| 1626 | Peak of nucleic acids due to the base carbonyl stretching and ring breathing mode |
| 1643 | Amide I band (arises from C=O stretching vibrations) |
| 1661 | n(C=C) cis in lipids and fatty acids |
| 1742 | C=O stretching mode of lipids |