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QUANTITATIVE DETERMINATION OF PHLOROTAN-NINS FROM SOME CHINESE COMMON BROWN SEAWEEDS

Yan Xiaojun (Institute of Oceanology, Chinese Academy of Sciences)  
Phlorotannins are polymers of phloroglucinol known only from brown algae with various bioactivities. Folin-Denis method was used to determine the contents of phlorotannins from some Chinese common brown seaweeds. The results showed that Sarg-assum was rich in phlorotannins, e.g. 2.8% (dry weight) for Sargassum kjellmanianum, 2.0% (dry weight) for Sargassum fusiforme and can be good resource for phlorotannins extraction.
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