1971 Volume 18 Issue 6 Pages 291-295
The distributions of melting point and gelation temperature of 124 bar style agars and 124 stringy agars manufactured in Nagano during December of 1968-March of 1969 were analyzed with respect to the species of the raw material seaweeds, The average melting point and gelation temperature of 96 products processed from the raw materials which were dominant with the Argentina Gracilaria verrcosa were respectively 79.3°C and 38.7°C, while those of 152 products processed from the raw materials Which Were mostly composed of the Japanese Gelidium species were respectively 87.3°C and 35.5°C.
The two groups of agar were so different each other not only in the distribution patterns of melting point, gelation temperature and temperature difference of melting and gelation, but also in the regression lines of melting point on gel strength that the agar included in the Argentina Gracilaria was estimated to be a different type of agar from the traditional Japanese agar.
A series of agar were experimentally processed from the raw materials mixed with the Argentina Gracilaria and the alkali treated Gracilaria of the other origins. The relationship between gelling properties and the mixed ratio of these two kinds of seaweeds was investigated to bring the results justifying the former findings.
