TABLE 3.

Band assignment of significant (P < 0.05) variations of second-derivative transforms of Raman spectral features of untreated C. sakazakii and C. sakazakii treated with diallyl sulfide and ajoene

Treatment and wave no. (cm−1)	Assignment
Control
1,522	Carotenoid peaks due to C-C & conjugated C = C band stretch
1,160	In-plane vibrations of the conjugated = C-C = β-carotene
1,129	ν(C-C) skeletal structure of acyl backbone in lipid
750	Symmetric breathing of tryptophan
Diallyl sulfide
1,638	Amide I band (both α-helix and β-sheet)
1,297	CH2 deformation of fatty acids
511	S-S disulfide stretching band
Ajoene
2,914	CH band of lipids and proteins
1,605	Phenylalanine, tyrosine, C = C (protein)
675	S-S disulfide stretching and ν(C-S) of amino acid methionine