查询词典 distillation

This paper describes the distillation method, the chemical components and the products quality control standard of essential oil of Melaleuca alternifolia.

文章叙述了互叶白千层芳香油的提取方法、化学组分及产品质量控制标准。

Coumarin in melilotus was extracted in the method of steam distillation, and the content of coumarin in product was less than 2% and plentiful tar as the by-product was found at the same time.

采用水蒸气蒸馏法对草木樨中的香豆素进行提取，其提取物中香豆素的含量不到2%，并伴有大量的焦油产生。

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.; mint oil ; steam distillation ; supercritical carbon dioxide extraction

薄荷；薄荷油；水蒸气蒸馏；超临界CO2萃取

An improved method of synthesizing trimethyl orthoformate through azeotropic distillation by taking sodium methoxide in methanol and chloroform as raw materials has been presented by the author.

摘 要：介绍了以甲醇钠甲醇溶液与氯仿为原料，采用共沸蒸馏法制备原甲酸三甲酯的改进工艺。

We provide the complete technical service for the distillation method production of the vegetable natural spices such as white michelia oil.

为植物性天然香料如白兰鲜花油等的蒸馏法生产提供全套技术服务。

For Os separation, solvent extraction (Br_2 or CCl_4) and distillation are two mainly effective techniques, and microdistillation is used to further purify Os.

Os的分离纯化方法有蒸馏法和Br2或CCl4萃取法以及微蒸馏法，它们是分离和纯化Os的有效方法，也是目前国内外大多数实验室所采用的方法。

In addition, a study of the hodrophobic modificaiton of polyethersulfone microporous membrane to be used in membrane distillation was also carried out.

另外，本文还进行了用于膜蒸馏过程的聚醚砜微孔膜的疏水化改性研究。

A process approaching 3 and 4 chlorophthalic anhydride in high purity via chloriation of o xylene , oxidation of monochloro o xylene by air in gas phase,and separation of 3 and 4 chlorophthalic anhydride afterwards by distillation is described.

介绍由邻二甲苯氯代，再经空气氧化及异构体分离合成氯代苯酐中试规模的合成路线。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。