Abstract
The results of comparison of gelatin sol mixed with agar to agar and gelatin individual case about the sol-gel transition and the rheological characteristics of the gel for mixed gelatin are sammarized as follows.
The gelation temperature of agar sol was 33°C and that of gelatin sol was about 14°C. The property of mixed sol for the gelation temperature resembles agar and the temperature was about 26-29°C.
The gelation time of mixed sol was much longer than individual case.
Transparency of an acid processed gelatin sol mixed with agar was remarkably lower than that of both agar and gelatin sols and it became turbid.
As for characteristics of fluidity at gelation temperature, the gelatin sol mixed with agar exhibited thixotropic property, while, the reference sol exhibited negative-thixotropic property.
The alkaline processed gelatin gels mixed with agar had a smaller rupture stress and a lower apparent elasticity in comparison with alkaline processed gelatin gels mixed with agar. The acid processed gelatin gels mixed with agar had a larger rupture stress and a higher apparent elasticity compared with agar and acid processed gelatin gel.
The amount ot syneresis for the acid processed gelatin gel mixed with agar was less and the gel was insoluble at room temperature.
