挥发油

Objective:To study the chemical components of the volatile oil from different part of Salvia miltiorrhiza Bge..

目的：研究丹参不同部位挥发油化学成分并进行比较。

The essential oil from stem, flower, leaf, root, nutlet and seedcase of Cleidiocarpon cavaleriei were extracted and its chemical constituents were analyzed by GC-MS.

用气相色谱-质谱对挥发油化学成分进行分析，并应用面积归一化法测定各成分的相对百分含量。

Results show that the antibacterial component belongs to volatile oil、sesquiterpene、phenols and organic acids. The antibacterial part of the broth was isolated by silica gel column and 6 fractions of obviously antibacterial activity were obtained .By further study Fractions 1、2、3 contain sesquiterpene and fractions 8、9 contain phenols and fraction 10 contains phenolic organic acid.

对发酵液抑菌成分的研究表明，抑菌活性成分组成为挥发油倍半萜、酚和有机酸等类化合物，采用硅胶柱层析对发酵液抑菌活性部位进行分离实验，得到了6个具有明显抑菌活性的粗组分（组分1、2、3、8、9、10），其中组分1、2、3含有倍半萜类物质，组分8、9含有酚类物质，组分10中有含酚羟基的羧酸类物质。

The experimental results show that the extract yield of Zanthorylum bungeanum oil from nucleus and shuck is 7.8% and 48.9%,respectively.

花椒油是从花椒籽核和壳中提取的一种天然挥发油，其成分以烯烃为主，随产地不同有

Of which there are twenty fatty acids, fifteen free amino acids, fourty four volatile oils, three alkaloids, a sucrose and β-sitosterol.

作者从苦参中共分析鉴定出87种成分，其中脂肪酸20种，游离氨基酸15种，挥发油47种，生物碱3种，蔗糖及β-谷甾醇。

Objective: To analyze the volatile components from Dracocephalum moldavica L. with gas chromatography-mass spectrography.

目的：用气相色谱－质谱联用法对香青兰的挥发油成分进行分析。

And 13 compositions were isolated and identified representing 95.47% of the total contents of the subterraneous essential.

藏药独一味地上和地下部分挥发油主要是由长链脂肪酸成分构成，其中含量最多的是棕榈酸。

Objective To analyze and compare the compositions in the essential oils from fruits and leaves of Syringa oblata.

目的分析比较紫丁香果和紫丁香叶挥发油的化学成分。

The study for the comprehensive utilization of Syringa oblata and Syringa reticulata var for preparations.

本实验分别采用水蒸气蒸馏法、乙醇回流法以及超声波提取法对紫丁香和暴马丁香中的挥发油进行提取，本研究为实现丁香的综合利用做前期准备。

In the paper,the essential oil of Syringa oblate Lindl var affinis Lingelsh bud from Qinghai was extracted by the method of water vapor distillation.

采用水蒸气蒸馏法提取了产自青海的白丁香花蕾的挥发油，应用GC/MS方法对其化学成分进行了分析，分离出47个色谱峰，鉴定了26个化合物，占总峰面积的88.7%，主要成分是丁香酚、丁香醇、石竹烯、苯乙醇等化合物。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。