摘要
利用Fenton反应产生的羟基自由基,采用比色法对大黄属药用植物:唐古特大黄、波叶大黄、穗序大黄不同部分提取液清除羟基自由基的活性进行了研究,结果表明:三种植物不同部分的提取液均有一定的清除羟基自由基的能力,清除能力因种、植株部分和提取方法的不同而异。三种植物中清除率最高的部分分别是:唐古特大黄根及根茎的水提液,为79.0%;波叶大黄叶片的乙醇提取液,为84.5%;穗序大黄叶片水提液和叶柄的乙醇提取液,分别为70.1%和70.7%。正品大黄植株地下部分清除率较非正品高,但地上部分清除率却低于非正品。
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.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2003年第1期128-130,共3页
Food Science
