Premium
EFFECTS OF OSMOTIC DEHYDRATION SHEETS ON FRESHNESS PARAMETERS OF THUNNUS THYNNUS STORED AT COLD TEMPERATURES
Author(s) -
SAITO K.,
HAMADASATO N.,
AHHMED A.M.,
KAWAHARA S.,
MUGURUMA M.
Publication year - 2010
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/j.1745-4549.2009.00440.x
Subject(s) - tuna , dehydration , yellowfin tuna , food science , osmotic dehydration , chemistry , thunnus , cold storage , fishery , biology , fish <actinopterygii> , biochemistry , horticulture
In this study, we evaluated the effects of osmotic dehydration sheets (ODSs) on quality parameters and morphological observation of tuna stored at 4C for 4 days. The use of ODSs did not affect Hunter L* and b* values, although use of low performance ODSs (ODS‐L) gave higher a* values and lower metmyoglobin percentage (Met‐Mb%) than other samples (P < 0.05). As increasingly higher‐performance ODSs were used, the total sample content of ATP‐related compounds and IMP (a component of umami) increased and the K values decreased (P < 0.05), indicating maintenance of tuna freshness. However, Hunter color values and Met‐Mb% revealed that the optimum dehydration level exists at low dehydration performance. ODS was effective in removing intercellular water of thawed tuna tissue. We therefore suggest ODS‐L as a functional tool for maintaining the color of tuna, and high performance ODS as a functional tool for maintaining freshness and reform watery texture of chilled stored tuna.PRACTICAL APPLICATIONS Frozen storage is the most effective way to preserve tuna products, but the quality of frozen and thawed tuna is inferior to that of chilled fresh tuna. The results of this study may be applied to improve the quality of frozen and thawed tuna and create better techniques for tuna preservation. We show that wrapping tuna meat with ODSs during chilled storage helps to maintain the quality of frozen and thawed tuna stored at cold temperature.