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SARCOMERE SHORTENING OF PRERIGOR MUSCLES AND ITS INFLUENCE ON DRIP LOSS.

Author(s) : HONIKEL K. O.

Type of article: Article

Summary

SHORTENING POSTMORTEM BETWEEN 271 AND 311 K (-2 AND 38 DEG C) REVEALED THAT THE SARCOMERES IN UNRESTRAINED, EXCISED RED BOVINE MUSCLE SHORTENED LESS THAN 10% IN THE PRERIGOR STATE BETWEEN 279 AND 291 K (6 AND 18 DEG C), BELOW 279 K, UP TO 70% AND BETWEEN 293 K (20 DEG C) AND 311 K IT WAS 40%. IN THE RED PORCINE MUSCLE THE MINIMUM OF SHORTENING WAS MEASURED AT ABOUT 283 K (10 DEG C), A HIGHER DEGREE OF SHORTENING -UP TO 50% -BEING OBTAINED ABOVE AND BELOW THIS TEMPERATURE. THE DRIP LOSS OF BOTH MUSCLE TYPES INCREASED LINEARLY WITH INCREASING PRERIGOR SHORTENING. THE INFLUENCE OF THREE EVENTS ON WATER MOVEMENT FROM THE INTERFILAMENTAL SPACE INTO THE INTERFIBRILLAR FLUID AND FROM THERE INTO THE EXTRACELLULAR SPACE IS CRITICALLY EVALUATED. THESE EVENTS ARE: (1) THE PRERIGOR CONTRACTION OF SARCOMERES ; (2) THE CHANGES DUE TO THE FALLING PH POSTMORTEM AND (3) THE ONSET F TS WITH ITS IRREVERSIBLE ASSOCIATION OF ACTIN AND MYOSIN.

Details

  • Original title: SARCOMERE SHORTENING OF PRERIGOR MUSCLES AND ITS INFLUENCE ON DRIP LOSS.
  • Record ID : 1987-0163
  • Languages: English
  • Source: Meat Sci. - 16,1986; 267-282; 8 fig.; 36 ref.
  • Publication date: 1986
  • Document available for consultation in the library of the IIR headquarters only.

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