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Real-time detection of water dynamics in abalone (Haliotis discus hannai Ino) during drying and rehydration processes assessed by LF-NMR and MRI

ABSTRACT To detect the water dynamics in abalone during drying is essential for the textural quality improvement, however, sufficiently rapid and nondestructive methods of abalone moisture monitoring are currently lacking. In this study, water changes in abalone during drying and rehydration processes were assessed using low field nuclear magnetic resonance and magnetic resonance imaging. A close correlation was observed between ATotal and the total moisture content, and a prediction model with high correlation (R2 = 0.935) was established. Furthermore, good correlations (R2 > 0.950) between hardness, chewiness, rehydration ratio, and T22 relaxation of dried abalone were observed during the rehydration process.