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Guluronic acid oligosaccharides (GOS) with degree of polymerization (DP) ranging from 1 to 10 were prepared by a rapid microwave degradation method. Polyguluronic acid, fractionated from alginate hydrolysate, was dissolved in dilute ammonia water at a concentration of 20mg/mL (pH 5) and then hydrolyzed under microwave irradiation (1600W) at 130°C for 15min to produce GOS mixture. The GOS mixture was...
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