Optimization, Structural Characterization, and Bioactivities of Polysaccharides from Rosa roxburghii Tratt Fruit Using Enzyme-Assisted Extraction

This study aimed to optimize the enzyme-assisted extraction of polysaccharides (RTFPs) from Rosa roxburghii fruit using response surface methodology. Under the optimal extrac- tion conditions, the yield of RTFPs reached 14.02%, which was close to the predicted value of 13.96%. The primary structural characteristics and the antioxidative and immunomod- ulatory activities of RTFPs were also examined. Structural characterization revealed that RTFPs comprise 36.38% neutral sugar, 48.83% uronic...