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Characterization of moisture migration of beef during refrigeration storage by low‐field NMR and its relationship to beef quality
Author(s) -
Cheng Shasha,
Wang Xiaohui,
Yang Huimin,
Lin Rong,
Wang Haitao,
Tan Mingqian
Publication year - 2020
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.10206
Subject(s) - chemistry , moisture , bound water , refrigeration , scanning electron microscope , relaxation (psychology) , food science , analytical chemistry (journal) , materials science , chromatography , composite material , thermodynamics , organic chemistry , psychology , social psychology , physics , molecule
BACKGROUND In this study, low‐field nuclear magnetic resonance (LF‐NMR) and magnetic resonance imaging (MRI) were used to investigated the moisture migration of beef during refrigeration storage, and its relationships to some physicochemical quality indicators were analyzed using partial least squares regression. RESULTS Three water components ascribed to bound water, immobilized water and free water in beef matrix were revealed by LF‐NMR relaxation results. The transverse relaxation time and peak area of immobilized water declined as storage proceeded, as a result of disruption to the microstructure revealed by scanning electron microscope images. MRI images found obvious water migration of beef during refrigeration storage, and scanning electron microscopy images revealed that the integrity of the muscle fiber bundle was destroyed. In addition, increased storage time also led to increases in pH, total volatile basic nitrogen, TBARS (thiobarbituric acid reactive substances) value, weight loss, cooking loss and b * value, and to decreases in water holding capacity (WHC), L * and a * values, and textural properties. CONCLUSION The strong correlations between water migration and the physicochemical quality changes suggested the possibility of LF‐NMR as a rapid and non‐invasive method to evaluate beef quality. © 2019 Society of Chemical Industry