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

Table 2

Trans fatty acid composition in soybean oil extracted by EAEP from extrudates at various extrusion temperatures under the condition of fixed feed moisture (14%) and rotational screw speed (200 rpm).

Fatty acids^B (g/100 g)	Extrusion temperature (°C) (pressure (bar))
	Control^A (1.0133)	80 (9.9113)	100 (2.2745)	120 (2.1050)	140 (8.0125)	160 (12.0500)
C18:1, 9t	0.57 ± 0.01^d	0.41 ± 0.01^e	2.09 ± 0.04^a	1.78 ± 0.02^c	1.91 ± 0.03^b	2.07 ± 0.04^a
C18:2, 9c, 12t	0.64 ± 0.01^d	1.61 ± 0.02^a	0.74 ± 0.01^c	0.82 ± 0.01^b	0.84 ± 0.01^b	0.76 ± 0.00^c
C18:2, 9t, 12c	0.11 ± 0.01^c	0.84 ± 0.01^a	0.07 ± 0.01^d	ND^C	0.21 ± 0.01^b	0.09 ± 0.00^d
Total trans-C18:2	0.74 ± 0.01^d	2.44 ± 0.05^a	0.81 ± 0.01^c	0.82 ± 0.01^c	1.05 ± 0.01^b	0.85 ± 0.01^c
C18:3 (9t, 2t, 15c + 9t, 12c, 15t)	0.68 ± 0.01^b,c	0.69 ± 0.01^b	0.68 ± 0.01^b,c	0.70 ± 0.01^a	0.69 ± 0.01^b	0.67 ± 0.01^c
C18:3, 9c, 12c, 15t	1.05 ± 0.01^e	1.14 ± 0.01^d	1.30 ± 0.02^b	1.40 ± 0.02^a	1.25 ± 0.02^c	1.32 ± 0.02^b
Total trans-C18:3	1.73 ± 0.02^d	1.82 ± 0.03^c	1.98 ± 0.04^b	2.10 ± 0.04^a	1.94 ± 0.04^b	1.99 ± 0.04^b
TTFA^D	3.05 ± 0.06^d	4.67 ± 0.09^b,c	4.87 ± 0.10^a,b	4.71 ± 0.09^b,c	4.90 ± 0.10^a	4.91 ± 0.10^a

^AControl: fresh oil from unextruded soybean flakes.
^BMean 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 ().