Given to the quality deterioration, nutrients loss and the reduction of processing characteristics of frozen surimi gels, the present study was conducted to prepare surimi gels with a dual-network microstructure based on the TGase-induced covalent cross-linking of MP and the non-covalent interaction of curdlan with myofibrillar proteins. Additionally, the freeze-thaw stability of the dual-network surimi gels was further investigated in terms of gel strength, WHC, rheological properties, and ice crystal morphology. The results suggested that the gel strength and WHC of the TG/C dual-network surimi gels (0.4% TGase and 1% curdlan) showed the smallest decreases of 24.38% and 9.29% after five freeze-thaw cycles, respectively, compared with control group. In addition, the TG/C dual-network surimi gels showed a small size and uniformly distribution of the ice crystals. Differential calorimetric analysis indicated that the TG/C dual-network surimi gels had the lowest freezable water content and gel eutectic point, which demonstrated that the microstructure ice suppression strategy based on the dual-network structure modulation could slow down the ice crystal growth-induced deterioration of the gel quality, and enhance the freeze-thawing stability of the gel. The results of this study can provide theoretical references for the development and design of high-quality surimi gels with stable freeze-thaw quality.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |