Table 3.
Characteristics and variations in bands in the FTIR spectra of the chitin of R. flaviceps treated with citral and control insects.
| No. | Wave Number (cm−1) |
Functional Group and Vibration Modes |
Band Assignment |
Control | Citral |
|---|---|---|---|---|---|
| 1 | 1050 | C–O asym. stretch in phase ring |
- | 88.21 | 77.54 |
| 2 | 1315 | CH2 wagging | Amide III, components of proteins |
91.65 | 82.77 |
| 3 | 1385 | C–H bend, CH3 sym. Deformation |
- | 85.77 | 76.88 |
| 4 | 1560 | N–H bend, C–N stretch |
Amide II | 88.81 | 79.32 |
| 5 | 1630 | C=O secondary amide stretch |
Amide I | 82.92 | 75.05 |
| 6 | 1656 | C=O secondary amide stretch |
Amide I | 93.78 | 75.28 |
| 7 | 2932 | CH3 sym. stretch and CH2 asym. stretch |
Aliphatic compounds |
89.53 | 84.08 |
| 8 | 3111 | N–H secondary amine asym. stretch |
Amide II | 88.46 | 81.86 |
| 9 | 3440 | O–H hydroxyl stretching | - | 68.31 | 64.70 |