Shelf Life Assessments of Australian Chilled, Vacuum-Packed Veal Primals During Storage at -1°C and 6.7°C

Title
Shelf Life Assessments of Australian Chilled, Vacuum-Packed Veal Primals During Storage at -1°C and 6.7°C
Publication Date
2020-07-24
Author(s)
Tunnage, Jessica
McGilchrist, Peter
( supervisor )
OrcID: https://orcid.org/0000-0003-3265-1134
Email: pmcgilc2@une.edu.au
UNE Id une-id:pmcgilc2
Wu, Shubiao
( supervisor )
OrcID: https://orcid.org/0000-0002-1790-6015
Email: swu3@une.edu.au
UNE Id une-id:swu3
Small, Alison
Sumner, John
Abstract
Please contact rune@une.edu.au if you require access to this thesis for the purpose of research or study.
Type of document
Thesis Masters Research
Language
en
Entity Type
Publication
Publisher
University of New England
Place of publication
Armidale, Australia
UNE publication id
une:1959.11/57128
Abstract

Six types of boneless and two types of bone-in chilled, vacuum-packed veal primals were assessed for shelf life at two different storage temperatures: -1°C and 6.7°C. The shelf life at -1°C varied from 170-266 days for boneless primals, and from 139-239 days for bone-in primals. At 6.7°C, the shelf life varied from 44-63 days for boneless primals, and 41 and 42 days for bone-in primals. The total aerobic bacteria plate counts had rapid exponential growth for all primals at 6.7°C, but did not follow the expected growth pattern (exponential growth in the first several weeks to a stationary phase of 7-8log10 cfu/cm2 ) when stored at -1°C. The shelf life for bone-in primals ended due to off-odour at both storage temperatures, while the shelf life for boneless primals ended due to excessive purge and discolouration at -1°C, with loss of vacuum also noted at 6.7°C. Some differences existed between primals for values of glycogen, shear force, pH, and cook loss, with the bone-in primals typically demonstrating the greatest change in parameter over time under vacuum storage when compared with the boneless primals. In this study, it has been demonstrated that there is a difference in shelf life between different types of chilled, vacuum-packed veal primals, with it being noted that all primals achieved the industry target of 90-120 days chilled shelf life when stored at -1°C. A range of interactions between potential factors affecting shelf-life were identified during this study. Further research is required to fully understand these interactions and their underlying mechanisms.

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