Identification of Rhizome Dioscoreae in different areas by thermal analysis Tissue Structures of Dioscorea Rhizomes and Authentication of Rhizoma Dioscoreae Hypoglaueae Medicinal Materials Safety evaluation of Rhizoma Dioscoreae bulbiferae and discussion risk control Composition and property characterization of Rhizoma Dioscoreae polysaccharide-Fe (Ⅲ) complex Processing technics of Rhizoma Dioscoreae stired by wheat bran