Quality Properties of Psyllium Husk Powder-Dosidicus gigas Surimi Composite Gel Imitation Noodles

The weak gel strength of Dosidicus gigas surimi restricts its applications in surimi products. However, the addition of hydrocolloids effectively improve this drawback. Psyllium husk powder (PHP) contains high levels of dietary fiber and forms a good quality hydrocolloid when dissolved in water. In this study, different concentrations of PHP were mixed with D. gigas surimi, and the cooking properties, gel properties, cold storage changes, water distribution and microstructure of the composite gel imitation noodles were studied. The addition of PHP deepened the color of the samples, and made the surimi obtain ductility and stretchability similar to grain noodles. When the level of PHP was approximately 10%, the water absorption reached saturation, and the water solubility and water-holding capability began to reduce. The gel strength and tensile modulus showed increasing trends, and the relative tensile rate reached the maximum value of 3.08 when 10% PHP was added. After refrigeration, the sample became softer and less viscous. Microstructure observations revealed that as more PHP was added, the surface became smoother and tighter and the gel network was more uniform. Overall, the composite gel imitation noodles formed by the addition of 10% PHP had the best quality.