Table 3.
Main wavenumber shifts and tentative assignments of SERS marker bands, characterizing femtosecond infrared (IR) laser pulses-irradiated (1100 nm) genomic DNAs from different grapevine varieties, as compared to the corresponding marker modes of untreated samples, respectively.
| Grapevine Varieties DNA (cm−1) | Shift (cm−1) | Grapevine varieties IR Irradiated DNA (cm−1) | Tentative Assignments a |
|---|---|---|---|
| Feteasca Regala | Feteasca Regala IR | ||
| 1423 | +19 | 1442 | Deoxyribose C2′H2 scissoring |
| Braghina | Braghina IR | ||
| 1174 | +17 | 1191 | dA, dG (C5–C6 str) |
| 1228 | −8 | 1220 | dT (in-plane ring –CH3 str) |
| 1306 | +8 | 1314 | dA, dG (C–N str (Im)) |
| 1602 | −28 | 1574 | dA, dG, dC (NH2 def) |
| Francuse | Francuse IR | ||
| 721 | −15 | 706 | dA (ring breathing) |
| 741 | +15 | 756 | dT (ring breathing) |
| 796 | +19 | 815 | bk 5′C–O–P–O–C3′ sym str |
| 1119 | +8 | 1127 | dA (C8–N9 str, N9–H, C8–H def) |
| 1532 | +21 | 1553 | dT (in-plane ring str) |
| 1575 | +15 | 1590 | dG, dA (C2=N3 of guanine) |
| Carloganca | Carloganca IR | ||
| 1170 | +10 | 1180 | dA, dG (C5–C6 str) |
| 1230 | +10 | 1240 | dT (in-plane ring –CH3 str) |
| 1304 | +10 | 1314 | dA, dG (C–N str (Im)) |
| 1604 | −26 | 1578 | dA, dG, dC (NH2 def) |
| Feteasca Neagra | Feteasca Neagra IR | ||
| 452 | −11 | 441 | str deoxyribose |
| 1182 | −10 | 1172 | dA, dG (C5–C6 str) |
| 1575 | +12 | 1587 | dG, dA (C2=N3 of guanine) |
| Tamaioasa Romaneasca | Tamaioasa Romaneasca IR | ||
| 929 | −14 | 915 | Deoxyribose |
| 1601 | +24 | 1625 | dA, dG, dC (NH2 def) |
| Ardeleanca | Ardeleanca IR | ||
| 449 | +10 | 459 | str deoxyribose |
| 795 | +8 | 803 | bk 5′C–O–P–O–C3′ sym str |
| 1450 | −27 | 1423 | Deoxyribose CH2 |
a Abbreviations: dA, deoxyadenosine; dG, deoxyguanosine; dC, deoxycytidine; dT, thymidine; bk, backbone; sym, symmetric; str, stretching; def, deformation; Im, imidazole.