Effect of Extruding Full-Fat Soy Flakes on Trans Fat Content

Table 3

Trans fatty acid composition of soybean oil extracted by EAEP from extrudates at various feed moisture levels under the condition of fixed extrusion temperature (100°C) and rotational screw speed (200 rpm).

Fatty acids^B (g/100 g)	Feed moisture (%) (pressure (bar))
	Control^A (1.0133)	10 (16.0825)	14 (2.2745)	18 (2.8938)	22 (0.2213)	26 (0.2413)
C18:1, 9t	0.57 ± 0.01^e	1.84 ± 0.03^c	2.09 ± 0.04^a	2.00 ± 0.04^a,b	1.71 ± 0.03^d	1.96 ± 0.04^b
C18:2, 9c, 12t	0.64 ± 0.01^e	0.72 ± 0.01^b	0.74 ± 0.01^b	0.69 ± 0.01^c	0.63 ± 0.01^e	0.78 ± 0.01^a
C18:2, 9t, 12c	0.11 ± 0.01^b	ND^C	0.07 ± 0.01^c	0.07 ± 0.01^c	ND	0.21 ± 0.01^a
Total trans-C18:2	0.74 ± 0.01^c	0.72 ± 0.01^c	0.81 ± 0.02^b	0.76 ± 0.01^c	0.63 ± 0.01^d	0.99 ± 0.02^a
C18:3 (9t, 12t, 15c + 9t, 12c, 15t)	0.68 ± 0.01^a	0.68 ± 0.01^a	0.68 ± 0.01^a	0.67 ± 0.01^a	0.66 ± 0.01^a	0.67 ± 0.01^a
C18:3, 9c, 12c, 15t	1.05 ± 0.02^d	1.23 ± 0.02^b	1.30 ± 0.02^a	1.10 ± 0.02^c	1.14 ± 0.02^c	1.10 ± 0.02^c
Total trans-C18:3	1.73 ± 0.03^c	1.91 ± 0.00^a,b	1.98 ± 0.09^a	1.77 ± 0.05^b,c	1.80 ± 0.08^b	1.78 ± 0.06^b,c
TTFA^D	3.04 ± 0.06^e	4.47 ± 0.08^c	4.87 ± 0.10^a	4.53 ± 0.08^b,c	4.14 ± 0.07^d	4.73 ± 0.09^a,b

^AControl: fresh oil from unextruded soybean flakes.
^BMeans of duplicate analyses ± standard deviation.
^CND: not detected.
^DTTFA: total of trans fatty acids.
^a–fSymbols bearing different letters in the same row are significantly different ().