Table 1 ATR‑FTIR peak positions and assignments for the haloalkaliphilic strains (RA5) and (A6)
Peak position (cm⁻¹) | Assignment | RA5 intensity | A6 intensity | Interpretation |
|---|---|---|---|---|
~3400–3300 | O–H stretching | Strong | Moderate | More –OH groups in RA5 |
~2920 | C–H asymmetric stretch | Weak | Moderate | Thicker organic layer in A6 |
~2850 | C–H symmetric stretch | Weak | Moderate | More aliphatic groups in A6 |
~1650 | Amide I | Weak–moderate | Strong | More protein capping in A6 |
~1540 | Amide II | Weak | Strong | Strong biomolecular signatures in A6 |
~1100–1000 | C–O / C–O–C stretching | Moderate | Strong | More polysaccharides in A6 |
~580–560 | Fe–O stretching | Strong, sharper | Strong, broader | Higher crystallinity in RA5 |
