Role of ε-Poly-lysine in mixed surimi gel: concentration, underlying mechanism, and application

Figures (5) Tables (4)

Figure 1.
Effect of different treatments on rheological properties of surimi.
Figure 2.
(a) Catalytic reaction of glutamine transaminase and (b) effect of different treatments on gel strength and cooking loss of surimi gel. a−d/A−D: values with different lowercase letters indicate significant difference (p < 0.05).
Figure 3.
Effect of different treatments on the transverse relaxation time T₂ of surimi gel.
Figure 4.
Effect of different treatments on the microstructure of surimi.
Figure 5.
Effect of different treatments on TBARS values of surimi gel. a−f: values with different lowercase letters indicate significant difference (p < 0.05).

Table 1.

Surimi samples with different treatments.

Groups	Hardness (g)	Springiness	Cohesiveness	Chewiness (g)	Resilience
CK	811.40 ± 45.28^de	0.81 ± 0.01^a	0.53 ± 0.02^b	498.36 ± 21.58^c	0.21 ± 0.01^e
TE	1105.80 ± 61.83^c	0.83 ± 0.01^a	0.56 ± 0.01^b	510.40 ± 26.04^c	0.24 ± 0.00^bcd
TE + P1	736.01 ± 18.49^e	0.80 ± 0.03^a	0.61 ± 0.00^a	348.78 ± 18.36^d	0.23 ± 0.01^cde
TE + P2	777.45 ± 39.61^de	0.80 ± 0.01^a	0.60 ± 0.02^a	307.03 ± 12.97^e	0.22 ± 0.00^de
TE + P3	869.66 ± 45.82^d	0.83 ± 0.02^a	0.63 ± 0.01^a	485.06 ± 22.73^c	0.28 ± 0.00^a
TE + P4	1492.80 ± 77.13^a	0.83 ± 0.01^a	0.60 ± 0.01^a	721.74 ± 31.55^a	0.26 ± 0.01^ab
TE + P5	1314.60 ± 84.10^b	0.81 ± 0.00^a	0.60 ± 0.02^a	652.36 ± 30.24^b	0.25 ± 0.01^bc
Different lowercase letters in the same column indicated significant differences (p < 0.05).

Table 2.

Effect of different treatments on the textural properties of surimi gels.

Groups	L*	a*	b*	Whiteness
CK	72.49 ± 0.82^e	−0.92 ± 0.01^e	10.42 ± 0.33^d	70.56 ± 0.65^d
TE	77.82 ± 0.34^ab	−0.23 ± 0.02^c	12.29 ± 0.29^bc	74.64 ± 0.26^ab
TE + P1	78.39 ± 0.40^a	−0.14 ± 0.01^a	12.46 ± 0.12^ab	75.05 ± 0.41^a
TE + P2	78.42 ± 0.43^a	−0.17 ± 0.0^b	12.46 ± 0.15^ab	75.07 ± 0.32^a
TE + P3	77.48 ± 0.16^b	−0.18 ± 0.02^b	12.37 ± 0.09^abc	74.31 ± 0.11^b
TE + P4	76.34 ± 0.05^c	−0.22 ± 0.01^c	12.73 ± 0.02^a	73.13 ± 0.04^c
TE + P5	75.48 ± 0.18^d	−0.26 ± 0.01^d	12.01 ± 0.14^c	72.70 ± 0.19^c
Different lowercase letters in the same column indicated significant differences (p < 0.05).

Table 3.

Effect of different treatments on the color of surimi gels.

Groups	P₂₁(%)	P₂₂(%)	P₂₃(%)	P₂₄(%)
CK	2.175 ± 0.186^c	1.198 ± 0.012^e	82.863 ± 0.691^bc	13.764 ± 0.091^a
TE	1.938 ± 0.095^d	2.166 ± 0.043^a	85.144 ± 1.336^a	10.752 ± 0.033^e
TE + P1	2.705 ± 0.067^b	1.414 ± 0.009^d	83.435 ± 1.616^b	12.446 ± 0.105^c
TE + P2	3.005 ± 0.003^a	1.845 ± 0.056^b	82.874 ± 1.739^bc	12.276 ± 0.108^c
TE + P3	3.107 ± 0.063^a	1.715 ± 0.033^c	83.950 ± 1.587^ab	11.228 ± 0.086^d
TE + P4	1.770 ± 0.018^d	2.099 ± 0.059^a	85.021 ± 1.756^a	11.110 ± 0.144^d
TE + P5	3.121 ± 0.007^a	1.758 ± 0.107^bc	82.136 ± 1.091^c	12.985 ± 0.018^b
Different lowercase letters in the same column indicated significant differences (p < 0.05).

Table 4.

Effect of different treatments on the transverse relaxation time T₂ of surimi gel.