柯德兰
化学
食品科学
纹理(宇宙学)
保水性
网络结构
束缚水
多糖
色谱法
化学工程
分子
生物化学
有机化学
工程类
人工智能
土壤科学
土壤水分
机器学习
图像(数学)
计算机科学
环境科学
作者
Hui Zhang,Tong Zhang,Xiong Zhang,Jingting Xu,Shuntang Guo
标识
DOI:10.1016/j.foodhyd.2023.109656
摘要
To improve the water retention capacity and texture stability of tofu induced by glucose-δ-lactone (GDL) during frozen storage, the effect of adding polysaccharide was evaluated in this study. The results showed that when 3% curdlan was added, the water retention of tofu frozen at −18 °C for 4 weeks (64.42%) closely resembled that of unfrozen tofu (66.16%). Simultaneously, the texture of the tofu was notably conserved in comparison to the fresh tofu, and the gel network exhibited a persistent density and uniformity. There is a discernible difference between the freezing and thawing onset points of tofu with the incorporation of curdlan gum, and curdlan combines with water to fill in the interstitial spaces and pores of the protein network, which effectively hinders the migration and flow of water. Further infrared studies demonstrated that the hydrogen bonds in the network were strengthened, which contributed to the stability of the tofu structure integrity. Meanwhile, the further cross-linking of protein molecules in the gel network and the formation of rough networks during the freezing process were prevented. This study reveals that curdlan forms a robust, tightly bound association with water, generating an intricate and interwoven network alongside soymilk protein aggregates, empowering the frozen tofu to effectively retain its quality and texture, closely resembling that of the fresh tofu.
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