查询词典 heracleum

ObjectiveTo study the extraction technology and effective factors of volatile oil from Heracleum hemsleyanum diels.

目的研究了牛尾独活挥发油的提取工艺和主要影响因素。

ObjectiveTo study processing conditions of supercritical CO2 extraction volatile oils from Heracleum hemsleyanum Diels.

目的研究超临界CO2萃取牛尾独活挥发油的工艺条件。

The optimal process conditions for microwave extraction were: temperature 50℃, microwave radiation time 120 s, power of microwave radiation 600 w, under these conditions the yield of volatile oil in Heracleum hemsleyanum Diels reached 0.72%.

微波萃取的最佳条件为：反应温度为50℃，微波辐射时间120 s，微波辐射功率为600 W，牛尾独活挥发油的收率为0.72%。

Results The optimal process conditions for supercritical CO2 extraction were: the pressure of 25 MPa, the temperature at 45℃ and CO2 flowing rate at 20 L/h, under these conditions the yield of volatile oil in Heracleum hemsleyanum Diels reached 0.65%.

结果超临界CO2萃取最佳工艺条件为：萃取压力25 MPa，萃取温度45℃，CO2流量20 L/h，在此条件下牛尾独活挥发油的收率为0.65%。

The pollen pictures of FFerula and Heracleum are taken under optical microscope and scan electrical microscope, respectively.

结果表明，阿魏属花粉形状为长球形，而独活属花粉为超长球形；2属花粉外壁均具有网状纹饰，3孔沟。

Methods Compared the orthogonal test design of supercritical CO2 extraction and extracting volatile oil in Heracleum hemsleyanum Diels.assisted by microwave.

方法利用超临界CO2与微波辅助萃取牛尾独活挥发油。

ObjectiveTo study processing conditions of supercritical CO2 extraction volatile oils from Heracleum hemsleyanum Diels.

此内容来自互联网搜索的结果，不代表爱医药网。如有信息不符，请告知。

All the results show that Heracleum is polyphyletic andclosely related with Pastinaca, Semenovia, Tetrataenium and Zosima. Evidencesfrom ITS support to place H.

结果显示独活属为复系群，与近缘的欧防风属、大瓣芹属、四带芹属和艾叶芹属有密切的亲缘关系。

ConclusionThe extraction rate of volatile oils from Heracleum hemsleyanum Diels by supercritical CO2extraction process is higher than that of water vapor distillation,and the optimized extraction conditions are:extraction pressure 25MPa,extraction temperature 45℃ and flow rate of CO2 20L/h, and the yield of volatile oils is 0.65%.

结果通过各因素级差大小的比较可知：萃取压力的变化对萃取率的影响最大，萃取温度次之，而CO2流量对萃取率的影响最小。结论超临界CO2萃取牛尾独活挥发油的萃取率较水蒸气蒸馏法高，最佳萃取条件为萃取压力25MPa，萃取温度45℃，CO2流量20L/h，挥发油收率为0.65%。

ConclusionMicrowave extraction has the highest yield in the shortest time. But volatile oil in Heracleum hemsleyanum Diels extracted by supercritical CO2 extraction or steam distillation has better quality.

结论微波萃取挥发油得率最高，时间最短；超临界CO2和水蒸馏法萃取挥发油的质量最好，因此使用超临界CO2是萃取牛尾独活挥发油的最佳途径。

The most precious possession that ever comes to a man in this world is a womans heart.

在这个世界上，男人最可贵的财产就是一个女人的心。

Some 4 years above company and divisional management experience, 6 year foreign enterprises work experience.

有4年以上的公司及部门管理经验，6年外企工作经验。