“…In recent years, polysaccharides have aroused the interest of many researchers, owing to their broad spectrum of biological activities, such as immunomodulation, antitumor, antioxidation, hypoglycemic activity and so on (Dang et al, 2013;Wang et al, 2014;Sun, Wang & Zhou, 2012;Zhu et al, 2013). Much evidence has indicated that chemical modifications and structural improvements of polysaccharides can bring stronger or new biological activities.…”