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Below-zero storage of fish to suppress loss of freshness

  • Takeya YoshiokaEmail author
  • Yoshiko Konno
  • Kunihiko Konno
Original Article Food Science and Technology

Abstract

The decomposition of ATP in flounder and greenling muscle were compared at 0 and − 2 °C. The decomposition of inosine-5-monophosphate (IMP) and subsequent increase in the K-value were suppressed at − 2 °C for both species, although the K-value increased much more slowly for flounder than for greenling. When flounder was stored at 0 °C, a high IMP content was maintained for more than 10 days, and then dropped quickly. This quick reduction in the IMP content was not observed at − 2 °C. The fast reduction in the IMP content at 0 °C was explained by the activity of an IMP-decomposing enzyme produced by spoilage microorganisms; it no longer occurred when the meat was stored in the presence of 150 p.p.m. of the antibiotic chloramphenicol. 5′-Nucleotidase produced by the bacteria was less stable than that produced endogenously. Spoilage bacteria also produced a strong protease that degraded muscle protein. It was concluded that lowering the storage temperature of flounder and greenling from 0 to − 2 °C suppressed the growth of spoilage bacteria and slowed the increase in the K-value.

Keywords

Inosine-5-monophosphate K-value 5′-Nucleotidase Super-chilling Decomposition 

Notes

Acknowledgments

This research was supported by grants from the NARO Bio-oriented Technology Research Advancement Institution (the special scheme project on a regional development strategy).

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Copyright information

© Japanese Society of Fisheries Science 2019

Authors and Affiliations

  1. 1.Hokkaido Industrial Technology CenterHakodateJapan
  2. 2.Laboratory of Marine Food Science, Graduate School of FisheriesHokkaido UniversityHakodateJapan

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