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A New Quinolizidine Alkaloid from Sophora flavescens
We studied the alkaloid constituents and bioactivity of Sophora flavescens (Leguminosae). The constituents were isolated with silica gel column chromatography, semi-preparative HPLC, Sephadex LH-20,Expand
Study on Growth and Effects of Mixed Forest Cunninghamia lanceolata and Liquidambar formosana
The mixed plantation of Cunninghamia lanceolata and Liquidambar formosana was positioned and investigated based on its growth and interaction with ecological environment.The results showed the mixedExpand
The fluctuation of tannin content in leaves of Castanea henryi damaged by Dryocosmus kuriphilus
The change of tannin contents in leaves, injured by Dryocosmus kuriphilus Yasumatus, were surveyed in this paper. The results showed that with the different damaged stages, the contents of tannin inExpand
The Study on the Fractal Feature of Soil Aggregate Structure in Different Mixed Proportion Stand Cunninghamia lanceolata×Liriodendron chinense
Using the fractal theory,elasticity analysis and marginal yield analysis,the regressive model on the fractal dimension of soil granular structure to soil aggregate content and structure damageExpand