This paper first analyzes the current situation of land use in Ma’anshan City,and points out some problems in Ma’anshan’s construction land use such as obvio
Yunnan has various and rich wetland resources because of the special geographical environment. In recent years,Yunnan has made great achievement in the manageme
The aim was to optimize ultrasonic extraction conditions and study antioxidant activities of lychee pericarp polysaccharides. The effects of extraction temperat