Abstract
The influence of various storage solutions and temperature (4°C and 25°C) on viability ofStreptococcus salivarius subsp.thermophilus andLactobacillusdelbrueckii subsp.bulgaricus entrapped in κ-carrageenan-locust bean gum mixed gel beads was studied. The immobilized strains could be stored at 4°C in all storage solutions studied for at least 14 and 11 days respectively before counts decreased to 105c.f.u./mL, which was considered to be the practical limit for their use as inoculum in a fermentation process. The most effective storage solutions for preserving cell viability at 4°C were NaCl, glycerol and sorbitol solutions forS. thermophilus, and PO4 buffer and sorbitol solutions forL. bulgaricus. At 25°C,S. thermophilus could be stored for over 14 days in all solutions except glycerol, andL. bulgaricus for 4 days in 10% sorbitol.
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