挥发油

OBJECTIVE To analyze the chemical components of volatile oil of Mallotus apelta.

目的分析白背叶挥发油的化学成分并用归一化法测定各成分的质量分数。

METHODS The volatile oil was obtained from Mallotus apelta by steam distillation.

方法采用水蒸气蒸馏法提取白背叶中的挥发油。

Methods: The demodex mites were collected by adhesive cellophane tape technique. The killing effects of different volatile oils against Df and Db were observed by microscope. Normal saline and Xinfu Manling Ointment were used as negative and positive controls, respectively.

采用透明胶带粘贴法获取蠕形螨，镜下观察不同中药挥发油对毛囊蠕形螨和皮脂蠕形螨的抑杀作用，并设立新肤螨灵软膏为阳性对照、生理盐水为阴性对照，进行体外抗螨活性筛选。

The condition of microwave-assisted extraction mentha rotundifolia volatile oil was studied through orthogonal design.

利用正交实验研究微波辅助萃取鱼香草挥发油的工艺条件。

Objective To compare the extraction yield of volatile oil and menthol from Mentha haplocalyx Briq.by different ex- traction methods.

目的比较不同提取方法对薄荷挥发油得率和薄荷醇得率的影响。

Essential oils were extracted from Mentha haplocalyx Briq. by steam distillation and supercritical CO2 extraction.

采用水蒸气蒸馏法和超临界CO2萃取法从薄荷中提取挥发油，并用GC-MS技术对其化学成分进行了分析。

Study on Hybrid Descendant of Tobacco Transformed by Mentha Total DNA Introduction;2. This paper uses the steam distillation to test the oil yield of violatile oil mentha .

水蒸气蒸馏技术是分离和提纯中草药中挥发油的重要方法，采用水蒸馏蒸馏方法，对薄荷进行了出油率的测定。

Mentha haplocalyx Briq.; Volatile oil ; Menthol ; Extraction method

薄荷；挥发油；薄荷醇；提取方法

Under which the extraction rate of volatile oil is 0.9652%. 2. The main effective components of the volatile oil by GC-MS are pulegone and menthone. In addition, 1-eicosanol that had never been reported in literature have been identified.

由GC-MS鉴定出挥发油的主要有效成分是胡薄荷酮和薄荷酮，并鉴定出了1-二十醇等文献未曾报道过的化合物。

The main effective components of the volatile oil from Schizonepeta tenuifolia Briq. by GC-MS are pulegone and menthone. In addition, dihydrojasmone and terrein that had never been reported in literature have been identified.

由GC-MS鉴定出挥发油的主要有效成分是胡薄荷酮和薄荷酮，并鉴定出了二氢茉莉酮、土曲霉酮等文献未曾报道过的成分。

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。