Physio-chemical properties of Pacific whiting surimi as affected by various freezing/storage conditions and gel preparation methods Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/gh93h2413

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • The effects of freeze-drying and flake freezing of surimi on biochemical and physical properties as affected by various storage conditions were examined. Using three cooking parameters shear stress and strain values were evaluated to measure gelation properties of surimi gels. Stress values increased up to 3 months and then decreased substantially as storage time was extended. In general, strain values decreased substantially over time, however, freeze-dried surimi kept in the freezer at - 18°C did not change during 9 months of storage. Overall, color decreased during storage and b* values of the freeze-dried surimi kept at room temperature increased significantly. Salt extractable proteins decreased while dimethylamine increased. Electrophoretic patterns, however, did not show any apparent damage to the MHC due to frozen storage and/or proteolysis (with 60°C incubation) until the 9th month of storage. At 9 months, a reduction of the MHC was observed and the lower molecular weight bands were more intense. Freeze-dried samples stored in the freezer maintained the highest quality for the duration of the 9 month study. Low temperature storage is important for retaining good functionality in freeze-dried surimi. The effects of cross-section diameter on shear stress and strain and effects of individual variation in measuring diameter were studied. Gelation properties of surimi using milled and molded gels were compared. The possibility of skin formation using various cook times was also evaluated. Shear stress values were significantly affected by diameter accuracy, whereas the effect was not as significant for shear strain values. Individual variation in measurement was also greatly noted. Molded gels resulted in significantly lower strain values than milled samples, whereas stress values were significantly higher in molded gels than in milled gels. Using a lechitin-based spray appeared to eliminate skin formation on all samples.
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 Scamax Scan+ V.1.0.32.10766 on a Scanmax 412CD by InoTec in PDF format. LuraDocument PDF Compressor V.5.8.71.50 used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2012-01-09T17:31:41Z (GMT). No. of bitstreams: 1 HOFFMANJUSTINE2000.pdf: 1583528 bytes, checksum: 793d8d14442070f95bbdfa46cff1efc3 (MD5) Previous issue date: 2000-07-19
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2011-12-19T18:18:22Z (GMT) No. of bitstreams: 1 HOFFMANJUSTINE2000.pdf: 1583528 bytes, checksum: 793d8d14442070f95bbdfa46cff1efc3 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-01-09T17:31:41Z (GMT) No. of bitstreams: 1 HOFFMANJUSTINE2000.pdf: 1583528 bytes, checksum: 793d8d14442070f95bbdfa46cff1efc3 (MD5)
  • description.provenance : Submitted by Erin Clark (ecscannerosu@gmail.com) on 2011-12-16T23:31:40Z No. of bitstreams: 1 HOFFMANJUSTINE2000.pdf: 1583528 bytes, checksum: 793d8d14442070f95bbdfa46cff1efc3 (MD5)

Relationships

In Administrative Set:
Last modified: 08/15/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items