Case Studies of Nuclear Magnetic Resonance Applications in the Food Sector【二】

Case Study 1: Changes in Water State and Mobility in Chicken Under Various Ultrasound-Assisted Pressure Treatments

 

Figure 1. Effect of Different Ultrasound-Assisted Pressure Treatments on Chicken T2 Relaxation Profiles

Note: J0–J5 represent various ultrasound-assisted pressure treatments. T₂₁: Bound water T₂₂: Immobile water T₂₃: Free water

Following ultrasound-assisted pressure treatments, free water was partially transformed into immobile water, resulting in enhanced water-holding capacity in the chicken samples.

Case Study 2: T2 Relaxation Profiles of Different Hydrocolloids and Concentrations

 

Figure 2. T2 Relaxation Profiles of Various Hydrocolloids at Different Concentrations

Case Study 3: Quality Changes in Cherry Tomatoes Under Different Storage Temperatures

 

Figure 3. Effect of Storage Temperature on Hydrogen Proton Density-Weighted Imaging of Cherry Tomatoes

Cherry tomatoes stored at 25°C showed visible signs of decay as early as day 3, while those stored at 4°C remained relatively intact until day 11. Decay progressed more rapidly and severely under the 25°C condition.

Instrument Used: NMR Imaging Analyzer – Model NMI20-040V-I