Abstract
This study explored the potential of sous-vide processing as a novel technique for transforming low-moisture textured soy protein (TSP) into a product with high moisture content and texture comparable to meat. We hypothesized that the sous-vide treatment would enable precise control of the TSP microstructure. In the ensuing process, the TSP maintained the moisture content at approximately 70% and changed color towards darker tones. Additionally, the porous microstructure changed, transitioning from a large to a smaller air layer. As the treatment continued, both the hardness and texturization index of the TSP were reduced. Furthermore, the secondary structure of the protein exhibited an increase in β-sheet and α-helix structures, indicating enhanced hydrogen bonds, hydrophobic interactions, and disulfide bonds. Optimally, a sample with 24 h at 90℃ displayed textural characteristics similar to chicken breast. The investigation underlines the sous-vide method as a revolutionary technique yielding high-moisture content and improved texture for TSP.
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