干しのり貯蔵中の色調および揮発性含硫化合物量の変化

概要

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Dried layer Porphyra yezoensis was stored at 5°C and 30°C for 18 months on the purpose to observe the deterioration of color and the change of volatile sulfur concentrations during storage. In case of storage at 30°C, deteriorations of color and luster of dried laver were observed after 3 months. Along with the color deterioration, the amount of dimethyl sulfide (DMS) decreased, and that of methyl mercaptan (MM) increased in dried laver. But, in case of storage at 5°C, changes in color, luster and DMS and MM contents in dried laver were not remarkable through a year, though increase of MM was observed after 14 months. Dimethy1-β-propiothetin as a precursor of DMS in dried laver decreased when stored at 30°C, but when stored at 5°C, the decrease was a little. Concentration of methyl methionine sulfonium salt as one of a precursor of DMS was not change remarkably during storage at 30°C and 5°C.
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