Detection of tan-sheep meat tenderness based on low-field nuclear magnetic resonance

Tan- sheep meat in Ningxia was used to be as the research object,the water distribution and mobility of the cold fresh tan- sheep meat during storage was studied by low- field nuclear magnetic resonance( LF- NMR) technique,and carried on the correlation analysis with the quality indexes such as p H,color( L*,a*,b*),shear force which were determined.The results found that the NMR transverse relaxation time T2 spectrum data indicated that four distinct water populations were observed in the tan- sheep muscle.Each group of water corresponding to the transverse relaxation time was T20,T21,T22,T23,and with each index was significantly higher( p < 0.05),where the relaxation time T2 and shear were significant correlation( p <0.01),and the correlation coefficient was 0.996,the total peak area of A was significantly negative correlation with shear force( p < 0.01),and the correlation coefficient was-0.991.To further study the relationship between peak area A,the transverse relaxation time T2 and shear force,established the regression equation curve to be fitting analysis,the peak area of A,transverse relaxation time T2 and the shear stress regression fitting effect were good,regression coefficients respectively were 0.960,0.942.This study would provide theoretical basis for the rapid detection of tan- sheep meat in the process of storage.