查询词典 volatile oil

Objective To optimize the extraction process by determing the volatile oil yield of steam distillation and supercritical CO2 extraction from flowers of Elaeagnus angustifolia L..

目的 比较水蒸气蒸馏法和超临界CO2萃取技术从沙枣花中提取挥发油的得率，确定最佳提取工艺。

Compatibility with the dried ginger volatile oil could restrain the enterokinesia in way of influencing cholinergic neuron function and the quantity of ICC.

各干姜挥发性成分理中配方主要通过影响胆碱能神经功能和空肠ICC数量来抑制肠的运动功能。

METHODS: Galanga Resurrectionlily Rhizome volatile oil was extracted by wet distillation method and determined by GC-MS , and the relative content of different constituents was determined by chromatographic peak area normalization method.

采用水蒸气蒸馏法提取山柰挥发油，用气相色谱-质谱联用技术进行测定，并用色谱峰面积归一法确定各化学成分的相对含量。

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。

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%。

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。

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。

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. Thus the supercritical CO2 extraction is the best way.

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 lavandula spica variety also has very much, besides refines the volatile oil specially the variety, but also has some varieties to be possible to take cuts the flower or the flower-bed using of, Taiwan the common variety has the sweet lavandula spica, the blade lavandula spica, the tooth leaf lavandula spica, the real lavandula spica at present and so on.

栽培时，须特别注意选择排水良好的介质，在一次浇足水后，应待土壤干燥时再给水，否则持续潮湿的环境会使根部没有足够的空气呼吸而生长不良，甚至突然全株死亡，栽培熏衣草失败的原因常常就在这里。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。