Journal of Spectroscopy

Research Article

GC-FID and NMR Spectroscopic Studies on Gamma Irradiated Walnut Lipids

Table 1

Fatty acids composition % of (Total Fatty Acids) TFA in total lipids of non-irradiated and irradiated walnuts packaged in atmospheric air.


Fatty acids	0 kGy	5 kGy	10 kGy	13 kGy

C12:0	0.03 ± 0.00^a	0.03 ± 0.00^a	0.03 ± 0.00^a	0.03 ± 0.00^a
C14:0	0.04 ± 0.00^a	0.04 ± 0.00^a	0.04 ± 0.00^a	0.04 ± 0.00^a
C14:1	0.02 ± 0.00^a	0.02 ± 0.00^a	0.02 ± 0.00^a	0.02 ± 0.00^a
iso-C15:0	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a
C15:0	0.35 ± 0.01^a	0.34 ± 0.01^a	0.35 ± 0.01^a	0.39 ± 0.01^b
C15:1ω-5	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a
C16:0	6.76 ± 0.07^a	7.45 ± 0.06^b	8.22 ± 0.04^c	9.03 ± 0.06^d
iso-C16:0	0.06 ± 0.00^a	0.07 ± 0.01^a	0.07 ± 0.01^a	0.08 ± 0.00^b
C16:1ω-7	0.08 ± 0.01^a	0.09 ± 0.00^a	0.09 ± 0.00^a	0.09 ± 0.01^a
iso-C17:0	—	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a
anteiso-C17:0	0.01 ± 0.00^a	0.02 ± 0.00^b	0.01 ± 0.00^a	0.02 ± 0.00^b
cyclo-C17:0	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a
C17:0	0.03 ± 0.00^a	0.05 ± 0.00^b	0.03 ± 0.00^a	0.06 ± 0.01^b
C17:1ω-7	0.02 ± 0.00^a	0.02 ± 0.00^a	0.02 ± 0.00^a	0.02 ± 0.00^a
C18:0	2.30 ± 0.03^a	3.07 ± 0.02^b	3.44 ± 0.08^c	3.84 ± 0.06^d
C18:1ω-9	19.77 ± 0.07^a	19.36 ± 0.07^b	19.15 ± 0.06^c	19.21 ± 0.05^c
C18:1ω-7	0.52 ± 0.01^ab	0.51 ± 0.02^ab	0.49 ± 0.01^a	0.52 ± 0.01^b
C18:2ω-6	59.71 ± 0.16^a	59.01 ± 0.06^b	58.44 ± 0.06^c	57.45 ± 0.04^d
C18:3ω-6	0.07 ± 0.00^a	0.07 ± 0.01^a	0.05 ± 0.01^b	0.03 ± 0.00^c
C18:3ω-3	9.52 ± 0.02^a	9.18 ± 0.04^b	8.90 ± 0.08^c	8.57 ± 0.06^d
C18:4ω-3	0.06 ± 0.00^a	0.06 ± 0.00^a	0.04 ± 0.00^b	0.03 ± 0.00^c
C19:0	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a
C20:0	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.02 ± 0.00^b
C20:1ω-9	0.17 ± 0.00^a	0.16 ± 0.01^a	0.18 ± 0.01^ab	0.19 ± 0.01^b
C20:3ω-6	0.02 ± 0.00^a	0.02 ± 0.00^a	0.02 ± 0.00^a	0.01 ± 0.01^a
C20:4ω-6	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a
C20:5ω-3	0.02 ± 0.00^a	0.02 ± 0.00^a	0.01 ± 0.00^b	0.01 ± 0.00^b
C22:4ω-6	0.02 ± 0.00^a	0.02 ± 0.00^a	0.01 ± 0.00^b	—
C22:5ω-6	0.03 ± 0.00^a	0.02 ± 0.00^b	0.01 ± 0.00^c	0.01 ± 0.00^c
C22:5ω-3	0.01 ± 0.00^a	0.01 ± 0.00^a	0.01 ± 0.00^a	—
C22:6ω-3	0.32 ± 0.01^a	0.31 ± 0.01^a	0.30 ± 0.01^a	0.27 ± 0.01^b
SFA	9.62 ± 0.10^a	11.12 ± 0.06^b	12.22 ± 0.11^c	13.56 ± 0.06^d
MUFA	20.59 ± 0.05^a	20.16 ± 0.08^b	19.96 ± 0.07^c	20.06 ± 0.04^bc
PUFA	69.79 ± 0.15^a	68.72 ± 0.03^b	67.80 ± 0.05^c	66.38 ± 0.04^d
UFA	90.38 ± 0.10^a	88.88 ± 0.07^b	87.77 ± 0.12^c	86.44 ± 0.06^d
Σω-6	59.86 ± 0.17^a	59.14 ± 0.04^b	58.55 ± 0.06^c	57.50 ± 0.04^d
Σω-3	9.93 ± 0.02^a	9.57 ± 0.04^b	9.26 ± 0.08^c	8.88 ± 0.06^d
ω-6/ω-3	6.03 ± 0.03^a	6.18 ± 0.03^b	6.33 ± 0.06^c	6.47 ± 0.05^d
MUFA/SFA	2.14 ± 0.02^a	1.81 ± 0.02^b	1.63 ± 0.02^c	1.48 ± 0.01^d
PUFA/MUFA	3.39 ± 0.02^a	3.41 ± 0.02^a	3.40 ± 0.01^a	3.31 ± 0.01^b
PUFA/SFA	7.26 ± 0.09^a	6.18 ± 0.04^b	5.55 ± 0.05^c	4.90 ± 0.02^d
C18:1ω-9/C18:2ω-6	0.33 ± 0.00^a	0.33 ± 0.00^a	0.33 ± 0.00^a	0.33 ± 0.00^a
C16:0/C18:0	2.94 ± 0.01^a	2.43 ± 0.01^b	2.39 ± 0.04^cb	2.35 ± 0.05^c

Values are the mean of three determinations from two individual experiments ( = 6).
Means in the same row bearing different letters differ significantly ().