Ultrasonic extraction, structural modification and gastric mucosal cells protective activity of a polysaccharide from Dendrobium denneanum

Optimize the ultrasonic extraction process of polysaccharides from Dendrobium denneanum by Response surface design (RSM). The main polysaccharide (DP40) from was separated by anion exchange chromatography, and its structure was modified by low-temperature plasma. The results showed that the polysaccharide extraction rate of ultrasonic was 22.98 ± 0.97%, which was significantly higher than water extraction method(P