抄録
The aim of this study to contribute to the establishment of a prevention method of decoloration of dried Ulva prolifera thalli in the distribution. The temporal change of the color of the thalli preserved under different conditions of drying, light and temperature was examined and clarified the common features and differences. In the experiment 1, a drying agent and/or a deoxidizing agent were enclosed with 10g of the thalli and the effects of dehumidification and deoxidization were investigated. Under a light condition at 25℃, decoloration could be prevented by enclosing a drying agent 20g. In the experiment 2, the optimal quantity of drying agent and the influence of light was investigated. When more than 10 g drying agent was enclosed with 10 g of the thalli, decoloration did not occur even if exposed under a natural sunlight through sunroof for 20 days. The results indicate that it is better to enclose more than 10g drying agent in the commercial package containing 10 g of dried Ulva prolifera thalli. Moreover, it became clear that moisture in the thalli and light are the main factors of decoloration and that dehumidification is the most effective to prevent the decoloration of the thalli in the distribution.
