Extraction of yellow pear residue polysaccharides and effects on immune function and antioxidant activity of immunosuppressed mice

Yellow pear residue polysaccharides were extracted via water bath alcohol precipitation, and the extraction conditions were optimized through the response surface method. The yield of polysaccharides maximized to 56.88 mg/g after extraction at 67.45 °C and material-liquid ratio of 1:34.91 for 3.66 h. The crude polysaccharide was further purified to obtain high-purity polysaccharide LPB-C, it was a kind of pyranoid polysaccharide containing a...