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Table 4 Monitoring macromolecular changes in C. pyrenoidosa by FTIR analysis

From: A novel nanoemulsion-based microalgal growth medium for enhanced biomass production

Wavenumber range (cm−1) Assignments Functional groups Peak (cm−1)
1064–880 Carbohydrate 965
1090–1030 P = O or Si–O Nucleic acids 1089
1150–1000 C–O/v Si–-O Polysaccharides/siloxane (carbohydrate peak/siloxane shoulder at 1200 cm−1) 1072
1263 C–O Ester 1260
1275 C–O–H Carbohydrates, proteins, DNA, and RNA 1266
1398–1370 CH3, CH2, C–O Proteins, carboxylic groups 1394
1456–1450 CH2, CH3 Lipid, protein 1456
1550–1640 N–H bending Amide 1558
1655–1638 C = O Protein (amide I) 1652–1653
1745–1734 C = O of esters Membrane lipids, fatty acids 1744
2875–2850 CH2, CH3 Lipids 2852
2930–2920 CH2 Lipids 2922,2924