Table 1 Functional groups of Lactococcus lactic subsp. lactis treated with cholesterol and the corresponding infrared absorption frequencies
From: In vitro assessment of hypocholesterolemic activity of Lactococcus lactis subsp. lactis
IR label | Frequency (cm−1) | Intensity | Assignment |
|---|---|---|---|
1. | 3268.09 | 82.94 | Bound hydroxy groups (OH) and primary and secondary amines and amides stretching (N–H) group |
2. | 2917.78 | 81.95 | ν(C–H) asymmetric stretching |
3. | 2849.33 | 86.58 | CH2 and CH3 symmetric stretching |
4. | 1641.28 | 69.35 | ν(P–H) stretching |
5. | 1545.90 | 74.20 | ν(C≡C) groups |
6. | 1396.21 | 81.65 | ν(COOR) ester group |
7. | 1227.51 | 77 | ν(C=O) bonded to amide I |
8. | 1039.37 | 67.15 | ν(N–H) bonded to amide II |
9. | 626.44 | 63.76 | ν(S=O) sulfamide bonds |