NUTRITION-STRUCTURE INTERACTIONS IN GREEN-TYPE AND YELLOW-TYPE PEAS (PISUM SATIVUM): MOLECULAR FUNCTIONAL GROUPS MAINLY RELATED TO LIPID BIOPOLYMER - Pisum Sativum - page 81

* *1A

0.12

0.11

0.10

0.09

Carbonyl ester (C=O)
stretching vibration
band baseline ca.
1771-1714 cm -1

0.08

0.07

0.06

0.05

0.04

0.03

0.02

0.01

0.00

4000 3500 3000 2500 2000 1500 1000

Wavenumbers (cm-1)

(a) Typical spectral bands that mainly associate with lipid in peas.

0.090

0.085

0.080

0.075

0.070

0.065

0.060

0.055

Carbonyl ester (C=O)
stretching vibration band
was ca. 1745 cm -1 ; baseline
ca. 1771-1714 cm -1 bands

0.050

0.045

0.040

0.035

0.030

0.025

0.020

0.015

0.010

0.005

0.000

1780 1760 1740 1720 1700 1680

Wavenumbers (cm-1)

(b) Carbonyl ester (C=O) stretching vibration band ca. 1745 cm -1 ; baseline ca. 1767-
1710 cm. 1

Figure 2. Typical FTIR-ATR spectrum in CDC peas in the mid-IR region ca. 4000-800
cm-1 (a) showing function groups that mainly associated with lipid: (b). carbonyl ester
(C=O) stretching vibration band was ca. 1745 cm-1; baseline ca. 1771-1714 cm-1.