Physical appearance of non-immobilized and immobilized yeast strain A, B, and C in rice flour and
white glutinous rice flour is presented in Fig. 1. It can be seen in Fig 1 that yeast strain A, B, and C were
reformed to 3 cm in diameter flat round immobilized cells. All the immobilized yeast strains were similar
in the shape and color. However, the structure of yeast strains in white glutinous rice flour support was
more brittle compare to yeast strain in rice flour.
3.2. Fermentation using commercial yeast strain
Three commercial yeast strains, labeled A, B, and C were used for glucose fermentation. Meanwhile,
immobilized those three kinds of commercial yeast strains in both of rice flour support and white
glutinous rice flour support were also applied for ethanol fermentation. Comparison of alcohol content
resulted from the fermentation processes are showed in table 1.