Journal
BIORESOURCE TECHNOLOGY
Volume 97, Issue 16, Pages 2032-2040Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2005.10.007
Keywords
tuna viscera; fish sauce; fermentation; halophilic bacteria; histamine
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Effect of storage condition of tuna viscera on chemical, physical and microbiological changes of its sauce were monitored. Results based on microbial counts, protein degradation products, total volatile base (TVB), and trimethylamine (TMA) contents, showed that tuna viscera stored at room temperature underwent more deterioration than that kept in ice, especially with increasing storage time. As a result, fish sauce obtained from tuna viscera stored at room temperature for a longer time rendered the greater amino nitrogen, TVB, TMA contents as well as browning intensity. However, storage conditions had no marked effect on overall changes in chemical, physical and microbiological characteristics of sauce generated during fermentation. Additionally, fish sauce produced from tuna viscera kept at room temperature comprised lower histamine content than that prepared from fresh or ice-stored viscera. Therefore, tuna viscera stored at room temperature for up to 8 h could be used for the production of fish sauce with no detrimental effect on the quality. (c) 2005 Elsevier Ltd. All rights reserved.
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