Related Experiment Video
Updated: May 27, 2026

Exploring the Longissimus Muscle: Unraveling its Correlation with Meat Quality in Bos indicus and Crossbred Bulls
Published on: July 12, 2024
Physicochemical and microbiological changes in irradiated fresh pork loins
M K Dogbevi1, C Vachon, M Lacroix
1Research Center in Microbiology and Biotechnology, Canadian Irradiation Center (CIC), Institut Armand-Frappier, 531. Boul. des Prairies, Laval, Quebec, Canada H7N 4Z3.
Abstract:
The effect of γ-irradiation on the physicochemical and microbiological properties of fresh pork was studied. Radiation treatments were carried out under air on fresh pork loins at doses of 2, 4 and 8 kGy and the loins were evaluated for deamidation, solubility, sulphydryl content and surface hydrophobicity. Deamidation was significantly (p⩽0.05) affected by the treatment with 98% deamidation at a dose of 8 kGy. No significant changes (p>0.05) were noted in sulphydryl content under the same conditions. The increase in deamidation resulted in a decrease in hydrophobicity and an increase in protein solubility. γ-irradiation also reduced the number of microorganisms in the meat. Mesophiles were more resistant to the irradiation treatment than psychrotrophs and Pseudomonas. All irradiated pork samples (1 or 3 kGy) had a bacterial count lower that 10(7) CFU/g after 15 days of storage. A minimal dose of 1 kGy was sufficient to increase the shelf life of fresh pork loins although variations in initial pork contamination was found to be the determining factor accounting for the effectiveness of the treatment.
Related Concept Videos
Pasteurization and Food Preservation
Methods of Controlling Food Spoilage
Principles of Food Preservation
Physical Methods for Controlling Microbial Growth: Temperature
Microbial Spoilage of Food
Physical Methods for Controlling Microbial Growth: Radiation and Filtration

