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KMID : 0380619870190060463
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Korean Journal of Food Science and Technology
1987 Volume.19 No. 6 p.463 ~ p.470
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Simulation of Quality Changes and Prediction of Shelf - life in Dried Laver Packaged with Plastic Films .
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Abstract
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In order to develop a rapid predicting method of the shelf-life of moisture sensitive foods and establish their proper packaging methods, the quality changes and shelf-life of dired layer as a model food were studied by the computer simulation. A mathematical model of the relationship between the rate constants of chlorophyll a and water activity was established at 10℃, 25℃ and 40℃. Computer simulation to predict water activity and chlorophyll a was developed by considering the simultaneous influence of storage conditions such as water content of products, storage temperature and relative humidity, packaging materials. Simulated quality changes of dried layer was in good agreement with the experiment data. Chlorophyll a and sensory score decreased as the water activity increased. And correlation coefficient between the sensory scores and the contents of chlorophyll a was very high as 0.991. The critical water activity by sensory evaluation was around 0.55. The shelf-life of dried layer packaged with plastic films could be predicted from the above results in various storage conditions.
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