Zhu Yingying, Zhang Li, Lin Zhuyi, Zhang Zhonghui, Cao Yeting, Ru Hua, Yan Jun, Li Shuxian, Li Zhong
Department of Food Nutrition and Test Center of Food Nutrition and Safety Suzhou Vocational University Suzhou China.
Arg & Forestry Prod Deep Proc Technol & Equipment Co-Innovation Center for the Sustainable Forestry in Southern China College of Forestry Nanjing Forestry University Nanjing China.
Food Sci Nutr. 2020 Dec 3;9(2):736-746. doi: 10.1002/fsn3.2039. eCollection 2021 Feb.
We have used low-field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging to measure water dynamics and migration, color, and texture profile (TPA) of icefish dried with hot and cold air methods. Relaxation time of T, T and T, and the peak area of A and A decreased significantly during drying. The water signal intensity decreased from the surface to inner regions during drying. Color parameters of L* and b* values increased significantly, TPA parameters of hardness increased, cohesiveness decreased significantly, and moisture content decreased significantly during drying. We observed correlations between the moisture content, TPA, color, and NMR parameters. In addition, we found lower thiobarbituric acid reactive substances and carbonyl content of the dried icefish with cold air compared with hot air. The cold air drying method yielded better sensory quality, and LF-NMR was a useful nondestructive method to determine the degree of drying and the quality of icefish.
我们使用低场核磁共振（LF-NMR）和磁共振成像来测量采用热风和冷风干燥方法处理的冰鱼的水分动态与迁移、颜色和质地剖面（TPA）。在干燥过程中，T1、T2和T2的弛豫时间以及A23和A16的峰面积显著降低。干燥过程中，水分信号强度从表面到内部区域逐渐降低。干燥过程中，颜色参数L和b*值显著增加，TPA参数中硬度增加，内聚性显著降低，水分含量显著降低。我们观察到水分含量、TPA、颜色和NMR参数之间存在相关性。此外，我们发现与热风干燥相比，冷风干燥的冰鱼中硫代巴比妥酸反应性物质和羰基含量更低。冷风干燥方法产生的感官品质更好，并且LF-NMR是一种用于确定冰鱼干燥程度和品质的有用的无损方法。
