摘要
Locoweed is a poisonous plant wildly distributed in most areas of the world,which causes livestock poisoning or death with serious economic loss.The Astragalus strictus belongs to a species of Iocoweed.It is mainly distributed in Tibet of China and is a serious hazard to the local livestock industry.The objective of this study is extracting and purifying condition of Swainsonine from Astragalus strictus with the cellulase extraction method.An optimum extracting technology of SW from Astragalus strictus was investigated through the orthogonal experiment under the cellulose assistance conditions,and then the content of swainsonine was analyzed with gas chromatography （GC） method.The optimized extraction conditions were as follow：The crushed mesh is 40; solid-liquid ratio is 1∶40 （g/ml）; enzyme dosage is 3.5％; enzymatic time is 3 h.Under the above conditions,the extraction percentage of the swainsonine was 0.003 941％.The conditions for extracting swainsonine with cellulase extraction method are mild,it is easy to utilize industrial production.It is benefit for producing swainsonine from Astragalus strictus.
疯草是一种有毒植物,广泛分布在世界大部分地区,牲畜采食后容易引起中毒或死亡,给养殖业造成严重的经济损失。茎直黄芪属于疯草的一种,它主要分布于中国西藏,是一种严重危害到当地畜牧产业的有毒植物。本研究的目的是利用纤维素酶法提取茎直黄芪中苦马豆素并进行气相色谱法检测,确定最佳提取工艺条件。通过单因素试验、正交试验和方差分析优化确定了苦马豆素的酶法提取工艺条件,并用气相色谱法测定了提取物中苦马豆素的含量。优化的最佳提取条件为:粉碎目数为40目,料液比1∶40,纤维素酶添加量3.5%、酶解时间3.0 h。在优化提取条件下,苦马豆素的提取率可达到0.003 941%。研究表明,纤维素酶法快速、高效、方便、节能,有利于茎直黄芪中苦马豆素的提取。
基金
中央级公益性科研院所基本科研业务费专项资金(1610322012001)
国家高新技术研究发展计划(863计划)课题(2011AA10A214)~~
