Table 4 General band assignments in FTIR spectra of reproductive adipose tissue, liver and muscle tissue [55]
Peak No | Wavenumber (cm-1) | Definition of the spectral assignment | ||
|---|---|---|---|---|
| Â | Epididymal adipose tissue | Liver tissue | Muscle tissue | Â |
1 | 3006 | _ | _ | Olefinic=CH stretching vibration: lipid (mainly unsaturated) |
2 | 2957 | 2963 | 2961 | CH3 asymmetric stretch: mainly lipid with the little contribution from proteins, carbohydrates, nucleic acids |
3 | 2922 | 2927 | 2927 | CH2 asymmetric stretch: mainly lipid with the little contribution from proteins, carbohydrates, nucleic acids |
4 | 2853 | 2854 | 2854 | CH2 symmetric stretch: mainly lipid with the little contribution from proteins, carbohydrates, nucleic acids |
5 | 1743 | 1745 | 1741 | Ester C=O stretch: triglicerides, cholesterol esters |
6 | 1646 | 1638 | 1638 | Amide I (protein C=O stretch) |
7 | 1550 | 1547 | 1550 | Amide II (protein N–H bend, C–N stretch) |
8 | 1464 | _ | _ | CH2 bending vibration: lipids |
9 | _ | 1455 | 1457 | CH2 bending vibration: lipids |
10 | 1340 | 1340 | 1340 | CH2 side chain vibrations of collagen |
11 | 1320 | _ | _ | collagen |
12 | 1280 | _ | 1282 | collagen |
13 | 1160 | _ | _ | stretching vibration of the C-O bond of glycerol skeleton of triglycerides |
14 | _ | 1154 | _ | C-O stretch glycogen |
15 | _ | 1081 | 1081 | C-O stretch: glycogen |
16 | 1047 | 1044 | 1046 | C-O stretching band coupled with C-O bending of C-OH groups of glycogen |