Infrared and Raman Spectroscopy and Imaging of Breast Cancer - Vibrational Spectroscopy for Tissue Analysis - page 128

0.05

A

0.04

3442
3087
2953
2912

0.03

HNG

0.02

0.01 ING

LNG

0.00

-0.01

-0.02

Grades

0.4

B

2845
1650
1511
1372

HNG

0.3

0.2

ING

0.1

LNG

0.0

Grades

0.06

C

1302
1216
1095
1056

0.05

HNG

ING

0.04

0.03

0.02

0.01

LNG

0.00

Grades

Figure 5.16
Plots of amplitudes of selected peaks. A: The intensity of each of the N-H peaks in the 3400 to
3100 cm −1 region decreases with increasing grade (low-intermediate-high), while the ampli-
tude of 3000 to 2800 cm −1 (C-H region) increases, indicating increasing concentrations of pro-
teins and nucleic acids and lipids. B: Plots of amplitudes of the bands at CH and amide I and
II regions (indicating that different tumour grades have varying protein contents) C: Plots of
amplitudes of some other peaks.