Degree Type
Dissertation
Date of Award
1987
Degree Name
Doctor of Philosophy
Department
Food Technology
Abstract
The effects of low-dose (1 kGy) gamma radiation and selected phosphates on the microbiology of refrigerated, vacuum-packaged ground pork were studied. Low-dose gamma radiation reduced (P 0.05) pH differences between irradiated and nonirradiated treatments, and irradiation treatment did not significantly (P > 0.05) increase lipid oxidation. Lipid oxidation was also not affected by phosphates. Pseudomonas was the major bacterial genus constituting the nonirradiated refrigerated (5(DEGREES)C), vacuum-packaged ground pork microflora. Pseudomonas predominated in nonirradiated samples in four of five sampling times. There was a decrease in the incidence of Pseudomonas as storage time increased. Irradiation greatly decreased the numbers of gram-negative microorganisms, resulting in predominance of the gram-positive, nonsporeforming Lactobacillus and coryneform bacteria.
DOI
https://doi.org/10.31274/rtd-180813-10890
Publisher
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Copyright Owner
Robson M. Ehioba
Copyright Date
1987
Language
en
Proquest ID
AAI8716760
File Format
application/pdf
File Size
130 pages
Recommended Citation
Ehioba, Robson M., "Effect of low-dose (1 kGy) gamma radiation and selected phosphates on the microflora of vacuum-packaged ground pork " (1987). Retrospective Theses and Dissertations. 8530.
https://lib.dr.iastate.edu/rtd/8530
