Optimization for preparation technology of baicalin-phospholipid complex in situ nasal gel by central composite design-response surface method Chemical constituents of Acanthopanax senticosus and their free radical scavenging activities Effects of Rehmannia glutinosa oligosaccharides on activity and gene expression of hepatic glycometabolic key enzymes in type 2 diabetic rats Establishment of rapid propagation system of Magnolia officinalis subsp. biloba Studies on germination condition of Marsdenia tenacissima seeds Cloning and analysis on GAPDH genomic DNA from Eleutherococcus senticosus