Optimization of the Technology for Production of Instant Polygonatum Powder by Response Surface Design

• Bo NIAN, 
• Xingyun SHI, 
• Jing LIU, 
• Rengao ZHU, 
• Bin JIANG, 
• Liyan WANG, 
• Tianjie GUO, 
• Lizhong WANG, 
• Jiyun LI, 
• Ming ZHAO