FOOD SCIENCE ›› 2018, Vol. 39 ›› Issue (14): 67-72.doi: 10.7506/spkx1002-6630-201814010

• Food Chemistry • Previous Articles     Next Articles

Effects of Sodium Chloride on Physical Properties and Microstructure of Pork during Dehydration

WU Jianfeng, ZHANG Liyan*   

  1. (School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China)
  • Online:2018-07-25 Published:2018-07-16

Abstract: The effects of NaCl concentration on the microstructure and physical properties of cured pork including color and water activity (aw), percentage volume change, longitudinal shrinkage rate (LSR) and transverse shrinkage rate (TSR) during hot air dehydration were studied and the correlation of these properties was analyzed. The results indicated that NaCl concentration mainly influenced a* and L* values of cured pork and reduced the color change, but the effects were limited. During the dehydration process, aw decreased faster with increasing NaCl concentration from 1% to 8%, while the effect was attenuated when NaCl concentration was greater than 8%. The volume change rate of samples with 1% NaCl was significantly higher than that of other samples (P < 0.05). The TSR of samples with 4% NaCl was significantly lower than that of other samples (P < 0.05). However, the LSR was not significantly affected by NaCl concentration (P > 0.05). The moisture content, aw, percentage volume change, LSR and TSR were not correlated with NaCl concentration. The changes in myofiber and myofiber membrane in cured pork were more pronounced with increasing NaCl concentration.

Key words: NaCl, pork, physical properties, microstructure

CLC Number: