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Stress Relaxation Test for Monitoring Post Mortem Textural Changes of Ice‐stored Cod (Gadus morhua L)
Author(s) -
Herrero A. M.,
Heia K.,
Careche M.
Publication year - 2004
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.2004.tb06344.x
Subject(s) - gadus , exponential function , relaxation (psychology) , fish <actinopterygii> , nonlinear regression , nonlinear system , linear regression , stress (linguistics) , stress relaxation , materials science , chemistry , mathematics , statistics , fishery , regression analysis , composite material , physics , biology , mathematical analysis , creep , quantum mechanics , neuroscience , linguistics , philosophy
The possibilities of using the stress relaxation test as a nondestructive method to monitor post‐mortem textural changes of ice‐stored cod have been evaluated. The stress relaxation tests were performed in gutted cod. Fish were compressed by 5% and deformation was kept constant for 60 s. The relaxation curves obtained were fitted to nonlinear and linear regression models. Nonlinear regressions with 2 or 3 exponential terms and the linear regression model could be fitted to the relaxation curve of ice‐stored cod, although the three‐terms exponential models gave the best results for assessing the quality of ice‐stored cod (maximum relative difference ≦ 2% and R 2 > 0.999). The highest differences were found between pre‐rigor and in‐rigor states.