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
893 cm
−1
CH
2'
out-of-plane bending
*
6
Backbone, C-C skeletal
*
12
893/5/6 cm
−1
Phosphodiester, deoxyribose
*
21
896 cm
−1
ν(C-C) protein backbone a-helix
(proline/glycogen), collagen
*
17
898 cm
−1
Monosaccharides (β-glucose),
(C-O-C) skeletal mode
*
7
Disaccharide (maltose), (C-O-C)
skeletal mode
*
7
899 cm
−1
CH
2'
out-of-plane bending
*
6
900 cm
−1
C-C skeletal stretching in protein
*
16
900-50 cm
−1
Variations in the secondary
structures of proteins
*
37
900-1300 cm
−1
Phosphodiester region
*
38
The nucleic acids
*
39
900-1350 cm
−1
Phosphodiester stretching bands
region (for absorbances due to
collagen and glycogen)
*
40
900-1450 cm
−1
CH
2
/CH
3
deformations
(scissoring, wagging, twisting,
and rocking)
*
1
907 cm
−1
Formalin contamination peak on
fixed tissues
*
41
913 cm
−1
Glucose
*
2
915 cm
−1
Ribose vibration, one of the
distinct RNA modes (with 915
and 974 cm
−1
)
*
12
918 cm
−1
Proline, hydroxyproline
*
3
Glycogen and lactic acid
*
8
920 cm
−1
C-C stretch of proline ring/
glucose/lactic acid
*
9, 10
C-C, praline ring (collagen
assignment)
*
19
924 cm
−1
Ring CH wag, cyclic C-C stretch
and C-N-C bend
*
14
Ring CH wag
*
14
925-9 cm
−1
Left-handed helix DNA (
Z
form)
*
23
928-40 cm
−1
ν(C-C), stretching; probably in
amino acids proline and valine
(protein band)
*
30, 42
931 cm
−1
Carbohydrates peak for solutions
and solids
*
24
Carbohydrates
*
30
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