Table 2 Fatty acid of pork by-products (g per 100 g fatty acid)

Fatty acids		Liver(g/100 g)	Lung(g/100 g)	Heart(g/100 g)	Stomach(g/100 g)	Small intestine(g/100 g)	Large intestine(g/100 g)
Capric acid	C_10:0	0.03±0.02^c	0.03±0.01^c	0.07±0.01^b	0.14±0.04^a	0.13±0.01^a	0.12±0.01^a
Lauric acid	C_12:0	0.20±0.01^b	0.05±0.02^b	0.10±0.02^b	0.19±0.03^a	0.19±0.05^a	0.17±0.01^a
Myristic acid	C_14:0	0.84±0.01^c	1.90±0.18^a	1.30±0.32^b	1.90±0.32^a	2.07±0.16^a	1.86±0.03^a
Pentadecanoic acid	C_15:0	0.13±0.02^bc	0.17±0.04^a	0.11±0.04^bc	0.07±0.01^bc	0.03±0.02^b	0.10±0.07^bc
Palmitic acid	C_16:0	19.00±1.07^c	32.34±1.45^a	20.10±0.83^c	27.28±0.37^b	28.88±1.94^b	26.90±1.54^b
Magaric acid	C_17:0	1.21±0.50^a	1.40±1.38^a	0.41±0.06^a	0.51±0.09^a	0.25±0.05^a	0.65±0.08^a
Stearic acid	C_18:0	20.26±0.91^a	14.44±0.58^c	13.63±0.75^c	18.26±0.39^b	20.24±1.12^a	18.70±0.64^ab
Arachidic acid	C_20:0	0.40±0.02^a	0.50±0.19^a	0.65±0.32^a	0.63±0.19^a	0.51±0.09^a	0.55±0.13^a
Behenic acid	C_22:0	Trace	0.13	Trace	Trace	Trace	Trace
Lignoceric acid	C_24:0	0.79^a	0.46^a	0.35^a	0.08^a	Trace	Trace
Myristoleic acid	C_14:1	0.02±0.01^a	0.02±0.01^a	0.03±0.01^a	0.02±0.01^a	0.04±0.01^a	0.03±0.01^a
Pentadecenoic acid	C_15:1	0.10±0.03^c	1.68±0.43^b	4.30±0.95^a	0.03±0.01^c	0.08±0.02^c	0.03±0.01^c
Palmitoleic acid	C_16:1	1.57±0.34^a	2.32±0.41^a	1.78±0.40^a	2.38±0.25^a	2.26±0.11^a	2.13±0.17^a
Magaoleic acid	C_17:1	0.35±0.02^a	0.25±0.02^ab	0.22±0.03^ab	0.26±0.02^ab	0.19±0.06^b	0.33±0.08^a
Oleic acid	C_18:1	25.14±1.16^c	24.50±1.13^c	29.71±1.13^b	37.34±1.74^a	35.41±0.66^a	36.31±1.02^a
Linoleic acid	C_18:2n6	15.18±0.18^b	7.27±0.34^d	18.09±1.07^a	7.73±0.69^d	7.30±0.52^d	9.76±0.39^c
(Linoleic acid in raw materials)		(0.73±0.01^c)	(0.17±0.01^f)	(0.66±0.04^d)	(0.36±0.03^e)	(0.83±0.06^b)	(0.90±0.04^a)
γ-Linolenic acid	C_18:3n6	0.06±0.02^ab	0.08±0.03^ab	0.15±0.08^a	0.06±0.01^ab	0.03±0.02^b	0.05±0.03^ab
Linolenic acid	C_18:3n3	0.59±0.04^ab	0.22±0.04^b	0.56±0.29^ab	0.44±0.06^ab	0.50±0.02^ab	0.70±0.16^a
Stearodonic acid	C_18:4n3	0.04±0.01^b	0.08±0.04^ab	0.17±0.05^a	0.11±0.03^ab	0.15±0.01^a	0.14±0.04^a
Eicosenoic acid	C_20:1n9	0.26±0.07^a	0.35±0.08^a	0.51±0.15^a	0.38±0.12^a	0.26±0.05^a	0.27±0.02^a
Eicosadienoic acid	C_20:2n6	11.83±0.53^a	9.05±0.14^b	5.43±1.26^c	0.65±0.11^d	0.53±0.04^d	0.40±0.02^d
Dihomo δ-Linoleic acid	C_20:3n6	0.14±0.03^a	0.01^a	0.12±0.04^a	0.19±0.15^a	0.06^a	0.05^a
Eicosatrienoic acid	C_20:3n3	0.13±0.03^a	Trace	Trace	0.01^b	0.01^b	0.02^b
Arachidonic acid	C_20:4n6	ND	ND	ND	ND	ND	ND
Eicosapentaenoic acid	C_20:5n3	0.03^a	0.08±0.06^a	0.04±0.02^a	0.02±0.01^a	0.03±0.01^a	0.04^a
Adrenic acid	C_22:4n6	Trace	1.02±0.22^a	Trace	Trace	0.07±0.02^b	0.06±0.04^b
Docosapentaenoic acid	C_22:5n3	0.15±0.04^a	0.05±0.02^a	0.06±0.04^a	0.13±0.05^a	0.08±0.03^a	0.08±0.03^a
Docosahexaenoic acid	C_22:6n3	0.32±0.04^a	0.13±0.05^b	0.05±0.02^c	0.02±0.01^c	0.02^c	0.02^c
Total fatty acid		98.07±1.25^a	98.11±0.74^a	97.66±2.33^a	98.67±0.63^a	99.19±0.63^a	99.37±0.24^a
Total saturated fatty acid		42.17±1.91^c	51.00±0.45^ab	36.49±1.28^d	49.00±0.69^b	52.30±0.62^a	49.06±0.74^b
Total unsaturated fatty acid		55.89±1.62^b	47.10±1.05^d	61.18±1.57^a	49.67±0.60^c	46.89±0.18^d	50.31±0.67^c
Fractionation rate of unsaturated fatty acid from crude fat		44.92±1.30^b	44.38±0.99^b	35.82±0.92^e	38.03±0.92^d	41.00±0.16^c	47.32±0.63^a
Fractionated linoleic acid		12.20±0.56^a	6.85±0.27^d	10.59±0.60^b	5.92±0.27^d	6.38±0.47^d	9.18±0.27^c

Data are expressed as the means±SD.
^a–f Means with different superscripts within the same row are significantly different (p<0.05).