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Post-mortem metabolism in fresh porcine, ovine and frozen bovine muscle
Linköping University, Department of Medical and Health Sciences, Division of Radiological Sciences. Linköping University, Faculty of Health Sciences. Linköping University, Center for Medical Image Science and Visualization (CMIV). Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Radiation Physics. Department of Physical Chemistry 2, University of Lund, 221 000 Lund, Sweden.ORCID iD: 0000-0001-8661-2232
Department of Physical Chemistry 2, University of Lund, 221 000 Lund, Sweden.
1987 (English)In: Meat Science, ISSN 0309-1740, E-ISSN 1873-4138, Vol. 19, no 1, 1-14 p.Article in journal (Refereed) Published
Abstract [en]

Post-mortem metabolism was followed by phosphorus-31-NMR in muscle samples obtained from freshly slaughtered pigs and lambs. Resonances for creatine phosphate (CP), ATP, inorganic phosphate (Pi) and sugar phosphates (SP) could be discerned and the intracellular pH could be determined from the spectra. The rates of post-mortem metabolism varied in the following fashion: porcine muscle > ovine muscle > bovine muscle. However, the course of post-mortem metabolism was, in all cases, the same. CP disappeared first and then ATP. Simultaneously, Pi increased, while SP remained relatively constant. The intracellular pH decreased to pH 5·5 in all tissues.

In a separate set of experiments the post-mortem metabolism during thawing was studied in bovine muscles that had been frozen immediately after slaughter. Again, the same course of post-mortem metabolism was observed, but the thaw shortening was accompanied by an extremely rapid post-mortem metabolism, which was more than ten times as fast as that measured for fresh bovine muscles. The intracellular pH decreased from 7·2 to 5·5 in 45 min. This rapid metabolism started only after the sample ha reached 0°C. Resonances for metabolites were broadened in frozen muscles due to the limited motions that are allowed within the ice lattice.

Place, publisher, year, edition, pages
Elsevier, 1987. Vol. 19, no 1, 1-14 p.
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-114174DOI: 10.1016/0309-1740(87)90095-7OAI: oai:DiVA.org:liu-114174DiVA: diva2:790795
Note

Times Cited: 19 Lundberg, p vogel, hj fabiansson, s ruderus, h 19

Available from: 2015-02-25 Created: 2015-02-11 Last updated: 2017-12-04

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Lundberg, Peter

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Division of Radiological SciencesFaculty of Health SciencesCenter for Medical Image Science and Visualization (CMIV)Department of Radiation Physics
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