Open AccessEffects of cold air dehydration on icefish water dynamics and macromolecular oxidation measured by low‐field nuclear magnetic resonance and magnetic resonance imaging
Author(s) -
Zhu Yingying,
Zhang Li,
Lin Zhuyi,
Zhang Zhonghui,
Cao Yeting,
Ru Hua,
Yan Jun,
Li Shuxian,
Li Zhong
Publication year - 2021
Publication title -
food science and nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 27
ISSN - 2048-7177
DOI - 10.1002/fsn3.2039
Subject(s) - dehydration , water content , moisture , chemistry , thiobarbituric acid , magnetic resonance imaging , nuclear magnetic resonance , nuclear magnetic resonance spectroscopy , analytical chemistry (journal) , resonance (particle physics) , relaxation (psychology) , materials science , chromatography , biochemistry , atomic physics , medicine , physics , radiology , psychology , social psychology , oxidative stress , geotechnical engineering , organic chemistry , engineering , lipid peroxidation
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 21 , T 22, and T 23 , and the peak area of A 22 and A 23 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.