To produce instant surimi products, sterilization is essential. Previous studies found that the gel strength
of surimi decreased significantly with treating temperature increasing from 100 C to 120 C, which
affected the texture of the products. In this study, the changes of the secondary structures of surimi gels
were studied to provide new train of thought for the improvement of the texture of high temperature
treated surimi gels. Surimi gels from Alaska Pollock were obtained by heating and maintaining their
central temperature at 100 C and 120 C for 10 min under a constant pressure (0.12 MPa). Infrared (IR)
spectroscopy and Raman spectroscopy showed that the secondary structure of the surimi gels with high
temperature (100 C) treatment was mainly random coil and the random coil structure damaged with
treating temperature increasing, which made the frames of the network structure become much more
fragile and the holes become larger, leading to the destruction of the textural properties of the surimi
gels.