Meat quality - pH in meat

4 important questions on Meat quality - pH in meat

What happens to meat when the pH is lower?

PSE: With lower pH, the meat is pale and the driploss of meat is much higher

What is the hampshire effect and what happens?

Hampshire effect is caused by the rendement napole gene.
  • low rendement (much loss after cooking)
  • less marketable (low pH, drip loss, weird color)
  • rendement napole gene causes high glycogen content in muscle tissue --> more lactic acid --> lower pH
  • dominant allele mainly found in hampshire breeds

How to prevent rigor mortis?

  • Mechanical stretching --> hanging carcass (pelvic suspension)
  • Electrical stimulation --> reduces ATP content before cold shortening occurs
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In what situations can extra Rigor occur?

Cold shortening:
  • extra rigor when slaughtered meat is cooled rapidly
Thaw Rigor: (thaw = ontdooid)
  • happens when freshly slaughtered muscles are frozen and thawed
  • prevent it by freezing meat after rigor mortis
Heat shortage:
  • keeping muscles at high temperature pre-rigor

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