Pork loins (M. longissimus thoracis et lumborum) from six domestic
half-carcasses (crossbreed of Landrace Yorkshire Duroc,
6-month-old hogs) with pH 5.6e5.8 were selected at 24 h postmortem
from a local meat market. All visible fat and connective
tissues were trimmed off, and six strips (6 6 15 cm) with fiber
parallel to the muscle were taken from each loin and weighed. The
meat strips were separately vacuum-packaged with poly nylon
pouches (Nylon/Poly ethylene coextrusion, thickness of
30e300 mm) and stored in a 4 C refrigerator prior to treatment for
less than 2 h. The whole sampling procedure was repeated on three
different days (n ¼ 3). All chemicals used for analyses were of
analytical grade.