Table 2.

Experimental wavenumber values corresponding to the maxima of the mid-IR total reflection mode bands of lipid materials and their tentative assignment.

Experimental wavenumbers (cm -1 )			Band assignment
Beeswax	Carnauba wax	Shellac wax
2965	2965	2965	ν asCH3
2935	2935	2935	ν asCH2
2858	2858	2858	ν sCH2
1745	1745	1752	νC=O (esters)
		1735	νC=O (acids/ketones)
1716	1716	1718	νC=O (acids/ketones)
	1612
	1522
1478/1468	1468	1478/1468	δ sciss CH2
		1250	C-O
1183	1183	1183	C-O
		1075
	832
735/725	725	735/725	δ rockCH2