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Hanne Christine Bertram1, Andrew K Whittaker, Henrik J Andersen
1Department of Food Science, Danish Institute of Agricultural Sciences, Research Centre Foulum, P.O. Box 50, DK-8830 Tjele, Denmark.
Meat Science
|November 9, 2011
Summary
Postmortem muscle water channels form within 24 hours, visible via nuclear magnetic resonance microscopy. Mobile water migrates to the surface, indicating changes near connective tissues.
Area of Science:
- Biophysics
- Muscle Physiology
- Postmortem Changes
Background:
- Understanding postmortem muscle changes is crucial for food science and preservation.
- Water distribution dynamics significantly impact muscle texture and quality.
Purpose of the Study:
- To investigate the progressive changes in water distribution within rabbit muscles postmortem.
- To visualize the formation and migration of mobile water using advanced imaging techniques.
Main Methods:
- Nuclear magnetic resonance (NMR) microscopy was employed to study rabbit muscles.
- T(2) and proton density images were acquired during the initial 24 hours postmortem.
Main Results:
- Interspersed lines with high signal intensity, indicating mobile water channels, developed progressively.
- Mobile water migration to the sample surface was observed after approximately 3 hours.
- A chemical shift artifact in proton density images suggested water channel development near connective tissue.
Conclusions:
- Nuclear magnetic resonance microscopy effectively visualizes dynamic water redistribution in postmortem muscle.
- The formation of water channels and subsequent water migration are key postmortem events influencing muscle properties.
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