Production of Yi Liang Duck Nam Prik Ong Packaged in Retort Pouch
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Abstract
Wastes from a low-quality tomato variety “Thomas” and an incompletely trimmed smoked Yi Liang duck were novel recovered to a ready-to-eat Lanna food product called Yi Liang duck Nam Prik Ong. The aims of this research were to investigate a sterilisation process of Yi Liang duck Nam Prik Ong and to evaluate a shelf life of Yi Liang duck Nam Prik Ong packaged in retort pouch using the accelerated shelf life testing method. The product was sterilised at 115 degree Celsius for 5, 10 and 15 minutes. The F zero values of each sterilisation time (5, 10 and 15 minutes) were 4 minutes, 8 minutes and 10 minutes, respectively. The shelf life evaluation of Yi Liang duck Nam Prik Ong packaged in retort pouch at 30 degree Celsius was 65 days. The pH values and sensory acceptance scores of all sterilised products were decreased after two months of storage. However, the number of colonies was less than 100 CFU/gram for total aerobic microbial count of all products. This is in accordance with a notification of the Ministry of Public Health throughout a storage time. This process can be applied as a guideline to process and evaluate other curry types packaged in a retort pouch.
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