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| Predictive Modelling of Quality Changes and Pseudomonas Growth during Chilled Storage of Mutton |
| LIU Ying-ying;LUO Rui-ming;LU Jun-yi;HU Cong |
| School of Agriculture, Ningxia University, Yinchuan 750021, China |
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Abstract The relationships between microbial and physiochemical properties for chilled mutton were investigated and
predictive models for the growth of the major pathogenic bacteria Pseudomonas were established. Total bacterial colony, pH,
total volatile basic nitrogen (TVB-N) and Pseudomonas count were measured during chilled storage of mutton at 4 ℃. The
results showed that pH initially rose and then fell, TVB-N increased slowly at the early stage of storage and rapidly at the
later stage. Gompertz models and square-root models describing the growth of Pseudomonas at 4, 7, 10, 15 ℃ and 20 ℃ were
fitted with Matlab 7.0 software. The growth models at 4 ℃ and 10 ℃ were valiated. Accuracy was observed within 20%,
indicating good prediction capability.
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2013, Vol. 27 
