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Table 2 Peaks assignment in the FTIR spectra of microbial lipid (lipid characteristics)

From: Aspergillus caespitosus ASEF14, an oleaginous fungus as a potential candidate for biodiesel production using sago processing wastewater (SWW)

Peak No

Wavenumber (cm–1)

Peak assignment

Representing biomolecule

References

1

3008

=C–H stretching

Lipid

[85, 86]

2

2953

–C–H (CH3) stretching (asym)

Lipid

3

2924

–C–H (CH2) stretching (asym)

Lipid

4

2853

–C–H (CH2) stretching (sym)

Lipid

5

1745

–C=O (ester) stretching

Lipid

6

1465

–C–H (CH2, CH3) bending (scissoring)

Lipid

7

1415

C–H rocking

Protein

[87]

8

1377

–C–H (CH3) bending (sym)

Lipid

[86]

9

1240–1265

P=O asymmetric stretching of > PO2 phosphodiester

Polyphosphate, phospholipid

10

720

CH2 rocking, bending

Lipid

Â