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In this study, water soluble polysaccharides were prepared from cyanobacteria Nostoc commune by water extraction. Factors affecting the polysaccharide yields were investigated, and the optimum extraction conditions were determined as follows: time, 4h; temperature, 90°C; the ratio of liquid to solid, 60:1 (v/w); and extraction times, 4. The extract was filtered, concentrated to ∼10% (w/v), precipitated...
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