Agriculture Reference
In-Depth Information
Table 2. Molecular structure spectral features of CH functional groups in
terms of the peak height of CH
3
-symmetric (CH
3
s), CH
2
-symmetric
(CH
2
s) and their ratios of yellow type and green type of CDC peas
Item
Peas Type
SEM
1
Green-Type
CDC Strike
Yellow-type
CDC Meadow
Peak height of CH
3
-symmetric (CH
3
s) and CH
2
-symmetric (CH
2
s)
2
0.0085
0.0079
0.00028
C
H
3
s
0.0081
0.0077
0.00028
C
H
2
s
Ratio CH
3
-symmetric (CH
3
s) to CH
2
-symmetric (CH
2
s)
Ratio of CH
3
s to CH
2
s
1.0621
1.0348
1.1434
1
SEM = pooled standard error of means; Means with the different letter within the same row are
significantly different (P < 0.05).
2
Peak center for the CH
3
-symmetric, CH
2
-symmetric groups was ca. 2871 cm
-1
, and 2855 cm
-1
,
respectively and baseline ca. 3021-2800 cm
-1
for the all CH groups.
Table 3. Molecular structure spectral feature of carbonyl C=O ester
(C=O) in terms of peak height and area and total CH peak area as well
as their ratios
I
tem
Peas Type
Green-Type
CDC Strike
Yellow-type
CDC Meadow
SEM
1
C
arbonyl C=O ester at 1745 cm
-1 2
P
eak height intensity
0.0053 a
0.0042 b
0.00021
0.1443 a
0.0858 b
0.00795
P
eak area intensity
T
otal CH area
P
eak area intensity
1.5066
1.4123
0.05249
Ratio of Carbonyl C=O ester area to total CH (CH3 and CH2) area
Ratio of C=O to CH 0.0950 0.0608 0.00570
1
SEM = pooled standard error of means; Means with the different letter within the same row are
significantly different (P < 0.05).
2
Peak center for the carbonyl ester (C=O) stretching vibration band was ca. 1740 cm
-1
; baseline
ca. 1770-1725 cm
-1
