Biomedical Engineering Reference
In-Depth Information
Table 8.1 (
Continued
)
Major Characteristic
Peak Frequencies Reported in the Literature
Reference
Number
Peak
Assignment
FT-IR
Raman
1448 cm
−1
CH
2
CH
3
deformation
*
3
Umbrella mode of methoxyl (2)
*
6
CH
2
deformation
*
19
CH
2
*
54
Collagen
*
97
1449 cm
−1
Asymmetric CH
3
bending of the
methyl groups of proteins
*
64
δ
as
(CH
3
)
*
1
δ(CH
2
) δ
as
(CH
3
) in proteins
*
17
1450 cm
−1
CH
2
bending
*
54, 98, 99
CH
2
bending mode in malignant
tissues
*
96
Bending modes of methyl groups
(one of vibrational modes of
collagen)
Methylene deformation in
biomolecules
CH
2
CH
3
deformation (collagen
assignment)
*
24
CH
2
deformation in IDC breast
tissue
*
52
C-H deformation bands (CH
functional groups in lipids,
amino acids side chains of the
proteins and carbohydrates)
*
*
19
22
δ(C-H)
Polyethylene methylene
deformation modes
*
22
CH
2
bending (proteins)
*
50
C-H bending deformation
*
43
CH
3
CH
2
twisting mode of
proteins and nucleic acids and
CH
2
bending mode of proteins
and lipids
*
*
85
35
CH
2
proteins/lipids
*
35
1451 cm
−1
CH
2
CH
3
deformation
*
3
Asymmetric CH
3
bending modes
of the methyl groups of proteins
*
66
δ[(CH
3
)] asym.
*
77, 88
CH
2
CH
3
deformation (collagen
assignment)
*
19
(
Continued
)
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