Time-Dependent Variations in Structure of Sheep Wool Irradiated by Electron Beam

Table 1

Characteristic wavenumbers of functional groups for native wool used in FTIR and Raman spectroscopy [25, 26].

Characteristic group	Structure	(cm^−1)
FTIR spectrometry
S-sulfonate (Bunte salt)	-S--	1022
Cysteic acid	--	1044
Cystine monoxide	-SO-S-	1075
Cystine dioxide	--S-	1128
Carboxylate	-	1389
Ethyl group, internal reference band	--	2849
Raman spectrometry
Disulfide bond	-S-S-	500–550
Amide I, internal reference band	-N-H	1653