FOOD SCIENCE ›› 2003, Vol. 24 ›› Issue (1): 128-130.

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In Vitro Study on OH’Scavenging Capabilities of Extracts from Jarious Parts of Chinese Rheum Species

 XIONG  Hui-Yan, ZHANG  Xiao-Feng, TAN  Da-Feng, JU  Xia   

  • Online:2003-01-15 Published:2011-12-13

Abstract: The hydroxyl free radical (•OH)scavenging capabilities of extracts produced in Fenton reaction from varius parts of three Chinese Rheums pecies were studied by colorimetry m ethod.The results showedthatextra cts produced from all of the three specie s had strong scavenging effect on hyd roxyl radical while the scavenging r at varied with the difference in specie s parts and extracting methods.Amon g themthe highest scavenging rats we re:the water extract in roots and stems o f R.tanguticum(79.0%),the ethanol extract in leaves of R.undulatum(84.5%),the ethanol extract in leaves and petioles of R.spiciforme (70.1%and 70.7%respoctively):The hydroxyl radical -scavening effect of roots fromauthentic Rheumspecie s was higher than that of non -authent ic Rheumspecies,but the effect of the a erial parts was lower than that of the non -authentic Rheumspecies.

Key words: rheum, various parts, extract, scavenging, hydroxyl free radical