Qingqing Jiang

Sous-vide cooking has attracted considerable attention for its capacity to minimise nutritional and qualitative degradation in muscle foods, with research into the intricate changes in sensory attributes becoming a particular focal point. This paper presents recent insights into the sensory transformations of meat, especially shifts in texture, color, and flavour during sous-vide processing. Both cooking temperature and duration exert important influences, with temperature generally playing a more pivotal role across diverse conditions. The molecular mechanisms underlying the impacts of sous-vide cooking on muscle foods are comprehensively delineated. Notably, partial protein denaturation is a critical factor influencing textural changes. Compared with conventional thermal cooking, certain endogenous enzyme activities are retained during sous-vide processing. Furthermore, alterations in protein structure affecting water migration are crucial for meat juiciness. Flavour development is closely linked to lipid oxidation and its interplay with amino acids. To advance understanding in this domain, the application of mass spectrometry, omics, and other advanced analytical techniques is deemed imperative. This review provides comprehensive insights into the sensory and molecular changes occurring in meat during sous-vide cooking, which offer valuable guidance for researchers and industries to understand the underlying mechanisms and optimise culinary techniques in this domain.

This study investigated the effects of vacuum impregnation (V) and atmospheric pressure impregnation (C) on the quality and microstructure of grass carp (Ctenopharyngodon idella) fillets during a 120 min brining period under 5.8% NaCl (w/v) and 4 °C. Vacuum impregnation significantly enhanced brining efficiency, achieving higher salt content (2.01%) and accelerated mass transfer kinetics, as evidenced by Peleg model parameters. Both treatments improved the water-holding capacity (WHC), increasing from 80.16% to 91.47% (C) and 89.92% (V), while reducing free water proportion. A microstructural analysis revealed a reduction in extracellular space in fillets, which further affected the fillet WHC and texture. Vacuum brining also mitigated lipid oxidation, yielding lower thiobarbituric acid-reactive substances (TBARSs: 0.237 mg MDA/kg). Texture analysis indicated reduced hardness and increased springiness/cohesiveness in fillets. Despite a slight decrease in lightness, vacuum-assisted brining preserved sensory quality and aligned with low-salt dietary trends. These findings underscore vacuum technology’s potential to optimize brining efficiency and product quality in industrial applications.

The evolution of quality attributes and their association with the protein properties of lightly tilapias fillets salted with different replacement proportions of NaCl with KCl (0%, 10%, 30%, 50%, 70%, 100%) at the same ionic strength were investigated. KCl replacements using optimal substitution (50% of KCl) contributed to maintaining desired quality properties. Further, KCl replacement (about 50~70% of KCl) led to the insolubilization and weakened stability of myofibrillar proteins, represented by the unfolding of the myofibrillar protein, increased surface hydrophilic points, and strengthened internal protein-protein interaction, resulting in the structurally reinforced hardness and lower water-holding capacity. Excessive replacement (more than 70% of KCl) showed apparent deterioration in taste quality, coloration, and hardness received by sensory sensation caused by immoderate hydrolysis and aggravated oxidation of the myofibrillar protein. In this sense, insights into KCl replacements on protein properties might be a positive approach to improving quality attributes of lightly salted tilapias fillets.