Figures & data
Figure 1. Time–temperature profiles of northern snakehead frozen by different methods.
T1 (frozen at −80°C to −60°C), T2 (frozen at −80°C to −18°C), and T3 (frozen by liquid nitrogen).
Figure 2. Changes in pH and content of salt-soluble proteins of northern snakehead frozen by different methods during frozen storage.
T1 (frozen at −80°C to −60°C), T2 (frozen at −80°C to −18°C), and T3 (frozen by liquid nitrogen).Each value is expressed as mean±standard deviation (n = 3).
Figure 3. Changes in activities of AG (A) and NAG (B) of northern snakehead frozen by different methods during frozen storage.
T1 (frozen at −80°C to −60°C), T2 (frozen at −80°C to −18°C), and T3 (frozen by liquid nitrogen).Each value is expressed as mean±standard deviation (n = 3).
Figure 4. Changes in the water-holding capacity of northern snakehead frozen by different methods during frozen storage.
T1 (frozen at −80°C to −60°C), T2 (frozen at −80°C to −18°C), and T3 (frozen by liquid nitrogen).Each value is expressed as mean±standard deviation (n = 6).
Figure 5. Changes in texture characteristics of northern snakehead frozen by different methods during frozen storage.
T1 (frozen at −80°C to −60°C), T2 (frozen at −80°C to −18°C), and T3 (frozen by liquid nitrogen). Each value is expressed as mean±standard deviation (n = 6).
Figure 6. Changes in LM (A) and SEM (B) profiles of northern snakehead frozen by different methods during frozen storage.
T1 (frozen at −80°C to −60°C), T2 (frozen at −80°C to −18°C), and T3 (frozen by liquid nitrogen).Magnification of LM profiles is 100 × .
Figure 6. (Continued).
