Wei Dong Man

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A rapid high-speed counter-current chromatography (HSCCC) method was used to isolate five minor compounds from rhizome of Sparganium stoloniferum namely San Leng in Chinese, including two phenylpropanoid glycosides, sparganiaside A (1) and 1-O-feruloyl-3-p-coumaroylglycerol (2), and three aromatic acids, vanillic acid (3), p-hydroxylcinnamic acid (4), and(More)
Human activity together with climatic changes have resulted in the substantial loss of wetlands in the Tumen River Basin of China in the past five decades. In this study, the landscape dynamics of wetlands upstream, midstream and downstream of the Tumen River Basin from 1960 to 2009 were investigated using remote sensing and geographic information systems.(More)
A rapid and convenient method was established to preparatively isolate the three ellagic acid types of compounds, which were the main polyphenols in Euphorbia pekinensis, by flexibly applying solvent extraction combined with counter-current chromatography (CCC). The total extract (extracted using 95% ethanol) of E. pekinensis was pretreated by two simple(More)
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