ผลของการบรรจุแบบสุญญากาศต่อคุณภาพทางเคมี จุลชีววิทยา และประสาทสัมผัสของปลาส้มนครนายก (EFFECT OF VACUUM PACKING ON CHEMICAL, MICROBIOLOGICAL AND SENSORY CHARACTERISTICS OF NAKHON-NAYOK TRADITIONAL FERMENTED FISH (PLA-SOM))
Keywords:
Pla-Som, Vacuum PackagingAbstract
Pla-som is a fermented food product made from fresh water fish. The shelf life of Pla-som is very short because the spontaneous fermentation by active lactic acid bacteria has an effect on the sensory characteristics of the product. The aim of this research was to study the chemical and microbiological characteristics and the acceptability of Pla-som from Nakorn-Nayok preserved in vacuum and non-vacuum packaging at room temperature (30๐C) and cold storage (4๐C). The results revealed that the storage of Pla-som at room temperature caused faster changes in pH, TBA value and weight loss and further decreased the sensory characters of the product. The use of vacuum packaging did not enhance the preservation in both storage temperatures. For the microbiological quality, storage of Pla-som in non-vacuum packaging at room temperature reduced number of E. coli and coliform. Salmonella was not detected after storing at room temperature for 7 days in both type of packages. However, the change in chemical and microbiological characteristics of Pla-som did not have an effect on acceptability score of fried product. In addition, Pla-som production in Nakorn-Nayok should be improved in term of hygienic practices because microbial quality of the product does not comply with community standard of Pla-som.
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