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Effects of Whole-Body Gamma Irradiation on Various Chemical Properties of Muscle¹

University of Tennessee Agricultural Research Laboratory^,3, Oak Ridge 37830

Abstract

Swine weighing approximately 90 to 113 kg were exposed to a total air dose of 700 R at a rate of 1 R or 45 R/min. of gamma radiation. Chemical determinations of the teres major muscle were taken 10 days postexposure and after a postslaughter interval of 5 days. No differences in ether extract, moisture content, crude protein or soluble protein were observed in the 1 R/min. group. However, the pH of the muscle at slaughter in this group was higher than control muscle and decreased with storage. Muscle from the 45 R/min. animals yielded more ether extract at slaughter and after the storage phase, while moisture content was lower at both times. A reduction in soluble protein was noted during the storage phase and higher pH values at slaughter.

¹ This manuscript is published with the permission of the Dean of the University of Tennessee Agricultural Experiment Station, Knoxville.

² Professor, Department of Food Technology and Science, University of Tennessee, Knoxville.

³ Operated by the Tennessee Agricultural Experiment Station for the U. S. Atomic Energy Commission under Contract No. AT-40-1-GEN-242.