摘要
采用分光光度法,测定了12种稻田杂草植株的乙醇提取液的吸光度(OD)值。结果表明,稗、千金子、碎米莎草和鸭舌草8h提取液的吸光度分别为0.0165、0.0215、0.0235和0.0120,均显著低于抗氧化剂茶多酚的,而与香薷的相当,表明这4种杂草乙醇提取物的抗氧化作用显著。在液料比12∶1、提取时间8h、提取温度80℃,以0.3%抗氧化剂水溶液为溶剂,加工获得的鸭舌草乙醇提取液的抗氧化作用最强。
The optical density （OD） values of the extracts got with ethanol from 12 weeds in rice fields were determined using spectrophotometry. The OD values of the extracts from Echinochloa crusgall ,Leptoechloa chinensis,Cyperus iria and Monochoria vaginalis after 8 h extraction are 0, 0165, 0. 0215, 0. 0235 and 0. 0120, respectively,which were lower than that of tea polyphenols significantly, while equivalent to that from Elsholtzia ciliata. It suggested that the substances from the ethanol extracts were excellent antioxidants with significant antioxidarion potential. By using water solution containing 0. 3% antioxidant, the conditions of the ratio of solvent quantity to sample material of 12 ： 1, extraction of 8 h and temperature of 80℃ were the optimal parameters for collecting the antioxidants from Monochoria vaginalis.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2006年第2期223-226,共4页
Chinese Journal of Rice Science
基金
国家自然科学基金资助项目(30571231)
国家杰出青年科学基金海外合作项目(30228005)。
关键词
杂草
己醇提取液
抗氧化剂
提取技术
weeds
alcohol extracts
antioxidant
extraction technique
