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
Due to changes in chemical
environment of the CH
2
bending
mode
*
25
CH
α,α'
in-plane bend
*
6
CH
3
, CH
2
deformation (collagen
assignment)
*
19
Triglycerides (fatty acids)
*
49
1443 cm
−1
CH
2
deformation (lipids and
proteins)
*
9
Triglycerides (fatty acids)
*
49
1444 cm
−1
Cholesterol band (associated to
atherosclerotic spectrum)
*
49
ν
28
(C
α
C
m
), observed in the spectra
of single human RBC
*
18
δ(CH
2
), lipids, fatty acids
*
*
7
δ(CH) (polysaccharides, pectin)
*
7
1445 cm
−1
δ(CH
2
), δ(CH
3
), collagen (protein
assignment)
*
20, 33
δ(CH
2
), δ(CH
3
), scissoring,
phospholipids (lipid assignment)
*
20, 33
CH
2
CH
3
bending modes of
collagen and phospholipids
*
20
CH
2
scissoring
*
20
CH
2
bending mode of proteins
and lipids are of diagnostic
significance
*
42
CH
2
bending and scissoring
modes of collagen and
phospholipids
*
41
Methylene bending mode
(a combination of proteins and
phospholipids)
*
41
CH
2
bending modes
*
33
1446 cm
−1
CH
2
bending mode of proteins
and lipids
*
9, 10
Umbrella mode of methoxyl (2)
*
6
CH
2
deformation
*
19
Protein peak
*
17
1447 cm
−1
CH
2
bending mode of proteins
and lipids
*
15
CH
2
deformation (protein
vibration); a marker for protein
concentration
*
12
δ
as
(CH
3
) δ(CH
2
) of proteins
*
43
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