Applied and basic aspects of prerigor pressurization of bovine skeletal muscle Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/2v23vx298

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Investigations were conducted to determine the effect of prerigor pressurization (15,000 psi, 37°C, 2 min.) of beef muscle on the subsequent retail/case-life characteristics of the treated meat. In addition, the activity of the calcium activated factor (CAF) of prerigor pressurized (PRP) muscle was also investigated. For fresh beef samples, PRP significantly (P<0.05) improved the lean color of steaks and also showed less discoloration than those of the control (CON). However, the PRP and CON steaks had similar values for off-odor, bacterial counts and weight loss. No significant differences were observed in any of the above traits for the ground beef samples. For beef samples stored at -1.6±1°C for 0, 3, 5, and 7 weeks, lean color scores of the PRP steaks were consistently higher than the CON at all storage intervals. PRP steaks also showed less discoloration and had higher overall desirability ratings at all storage intervals. Although PRP and CON steaks had similar microbial counts after 0 and 3 weeks of storage, the CON steaks had higher microbial counts after 5 and 7 weeks of storage. PRP had no apparant detrimental effects on the storage or case-life characteristics of meat, but rather it beneficially influenced most of the parameters examined. The effect of PRP on CAF activity was studied to further elucidate the mechanism of meat tenderization by PRP. Crude CAF was prepared from PRP and CON muscles at 0, 1, and 3 days of postmortem storage. Throughout these periods, PRP samples had consistently lower total CAF activity than CON, yet, it seems likely that PRP caused a transient increase in Ca⁺⁺ sufficient to activate CAF for an initial brief period of time, because 1) early postmortem, PRP muscle showed detectable levels of a 95,000-dalton component presumably produced by CAF; 2) Z-lines from at-death PRP muscles were highly degraded; and 3) during very early postmortem storage, the SDS-electrophoretic patterns of PRP myofibrils resembled those of CAF-treated myofibrils. CAF autolysis may account for the low CAF activity observed in PRP muscles at later postmortem storage times.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 256 Grayscale) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Submitted by Kevin Martin (martikev@onid.orst.edu) on 2013-07-17T21:11:40Z No. of bitstreams: 1 KoohmaraieMohammad1984.pdf: 3945233 bytes, checksum: 1c1f2aafe20c3bc3ba5ce4664a50061b (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-07-18T14:48:34Z (GMT) No. of bitstreams: 1 KoohmaraieMohammad1984.pdf: 3945233 bytes, checksum: 1c1f2aafe20c3bc3ba5ce4664a50061b (MD5)
  • description.provenance : Made available in DSpace on 2013-07-19T18:04:12Z (GMT). No. of bitstreams: 1 KoohmaraieMohammad1984.pdf: 3945233 bytes, checksum: 1c1f2aafe20c3bc3ba5ce4664a50061b (MD5) Previous issue date: 1984-04-30
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-07-19T18:04:12Z (GMT) No. of bitstreams: 1 KoohmaraieMohammad1984.pdf: 3945233 bytes, checksum: 1c1f2aafe20c3bc3ba5ce4664a50061b (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items