Abstract
A method for synthesizing branched fructo-oligosaccharides (BFOS) with a high concentration of sucrose (1–3 M) was developed using levansucrase prepared fromLeuconostoc mesenteroides B-1355C. The degree of polymerization of oligosaccharides synthesized according to the present method ranged from 2 to over 15. The synthesized BFOS were stable at a pH ranges of 2 to 4 under 120°C. The percentage of BFOS in the reaction digest was 95.7% (excluding monosaccharides; 4.3% was levan). BFOS reduced the insoluble glucan formation byStreptococcus sobrinus on the surfaces of glass vials or stainless steel wires in the presence of sucrose. They also reduced the growth and acid productions ofS. sobrinus. Oligosaccharides can be used as sweeteners for foods such as beverages requiring thermo-and acid-stable properties and as potential inhibitors of dental caries.
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