Objective: To determine the content of imperatorin in the tetraploidy radix angelicae dahuricae , and compare it with the original diplontic varites.

Optimization of Alcohol Refluxing Extraction Technique of Rhizoma Corydalis and Radix Angelicae Dahuricae in Compound Yuanhu Zhitong Patch;

Orthogonal test for optimization of extraction procedure of Radix Angelicae dahuricae;

Studies on the process for extraction of Radix Angelicae Dahuricae by orthogonal experiments;

Microwave-assisted extraction process of coumarins in Angelica dahurica with Uniform design;

Effect and mechanism of water decoction of Angelica dahurica on rat isolated pulmonary arterial rings;

The Influences of Different Drying Methods on the Contents of Imperatorin and Isoimperatorin in Extracts of Angelica dahurica;

Studies on Original Plant of Traditional Chinese Drug “Bai Zhi” (Radix Angelicae Dahuricae)and Its Closely Related Wild Plants Ⅳ.Discussion on Original Plant and Cultivation History of Traditional Chinese Drug “Bai Zhi” and Evolut;

Studies on Original Plant of Traditional Chinese Drug “Bai Zhi” (Radix Angelicae Dahuricae)and Its Closely Related Wild Plants Ⅲ.Comparson of Coumarins of“Bai Zhi”with Those of Closely Related Wild Plants;

Studies on Original Plant of Traditional Chinese Drug “Bai Zhi”(Radix Angelicae Dahuricae)and Its Closely Related Wild Plants Ⅱ.Karyological and Pollen Morphological Studies on “Bai Zhi” and Closely Related Wild Plants;