Table 1.
Position of bands (in cm−1) with their assignment in the ATR IR spectra of three investigated extracts: hot water extract (HWE), cold water extract (CWE) and ethanol extract (ETE) from pumpkin seeds.
| HWE Band (cm−1) | CWE Band (cm−1) | ETE Band (cm−1) | Assignment |
|---|---|---|---|
| 417 | - | 423 | PO2 |
| - | - | 477 | polisaccharides, amylose, amylopectin |
| - | - | 635 | νC-S (AA: methionin) |
| - | 677 | 677 | DNA: ring, G |
| - | 710 | 712 | νC-S (AA: methionin) |
| - | - | 816 | proline, hydroxyproline, tyrosine, PO2 |
| 874 | - | - | hydroxyproline, tryptophane |
| 972 | - | 961 | fatty acids |
| - | 999 | 1001 | phenylalanine |
| - | - | 1055 | amylose |
| 1075 | - | - | fatty acids |
| - | 1084 | - | DNA |
| - | - | 1111 | cellulose |
| - | - | 1148 | carbohydrates |
| 1267 | - | 1277 | unsaturated fatty acids |
| 1304 | 1302 | 1295 | fatty acids |
| - | - | 1372 | DNA: T, A, G; saccharides |
| - | - | 1420 | DNA: A, G |
| 1441 | 1441 | 1449 | fatty acids |
| - | - | 1485 | DNA: A, G |
| - | - | 1556 | Amide II |
| - | - | 1571 | DNA: A, G |
| - | - | 1586 | phenylalanine, hydroxyproline |
| - | - | 1605 | phenylalanine, tyrosine, NO2 |
| 1657 | 1657 | 1655 | unsaturated fatty acids/proteins (amide I) |
| 1746 | - | - | fatty acids |
| 2722 | - | - | νC-H, νN-H, νO-H |
| 2855 | 2854 | - | saturated fatty acids |
| 2928 | 2918 | 2920 | saturated fatty acids |
| 3011 | 3008 | - | unsaturated fatty acids |
“-“—Indicates the lack of signal recorded.