Effect of cryoprotectants on the physico-chemical characteristics of chicken breast surimi manufactured by pH adjustment during freezing storage

Abstract

This Study was conducted to determine the effect of cryoprotectants (sugar, sorbitol, polyphosphate) on the physico-chemical characteristics of chicken breast Surimi manufactured by pH adjustment (pH 11.0) during freezing storage. The final surimi was divided into experimental units to which the following treatments were randomly assigned: C (Alaska pollack Surimi: two washings, 4% sugar + 5% sorbitol ' pound 0.3% polyphosphate additive); T1 (chicken breast Surimi: pH 11.0 adjusted, 0.3% polyphosphate additive); T2 (chicken breast Surimi: pH 11.0 adjusted, 5% sorbitol + 0.3% polyphosphate additive), T3 (chicken breast surimi: pH 11.0 adjusted, 4% sugar + 5% sorbitol + 0.3% polyphosphate additive). The crude protein content of the control was higher than all treated samples, however the moisture, crude fat and crude ash of T3 were higher than the control (p < 0.05). The pH, WHC and collagen content of the control were higher than all of the treated samples, and these values decreased with storage time for all treatments and the control (p < 0.05). The cholesterol content of the control was lower than all treated samples, but the myofibrillar protein contents of all treated samples were higher than the control (p<0.05). The cooking loss of T2 was lower than the control and the other two treatments (p < 0.05). The L*, a* and b* values of all treated samples were higher than those of the control during freezing storage (p < 0.05). The W value of T3 at 1.5 and 3 months of freezing storage was higher than the control and T1 (p < 0.05). The myoglobin and met-Mb contents of the control were similar to all treated samples, and the met-Mb content of the control and all treated samples increased with storage time (p < 0.05). Immediately after freezing, the hardness of the control was higher than all treated samples, however it was lower after 1.5 and 3 months of frozen storage (p < 0.05). The cohesiveness and gumminess of the control were higher than all treated samples immediately after freezing, however the values for T3 were higher than those of the control and the other two treatments during frozen storage for 1.5 and 3 months (p < 0.05).