香芹烯

You will obtain infrared spectra of the carvone and limonene fractions and interpret the results.

你将得到香芹酮和柠檬烯馏份的红外光谱图。并且要解析其结果。

Discussion of what the identity of the carvone enantiomer tells you about the identity of the limonene in your sample.

讨论一下香芹酮对映体的鉴定对你样品中柠檬烯的鉴定有什么启示。如果有的话

You will use gas chromatography and refractometry to check the purity of your distillate and to estimate the relative concentrations of limonene and carvone in the oil.

你将用到气相色层分析和折射仪去检测你的蒸馏物的纯度。从而估计在油中柠檬烯和香芹酮的相对浓度。

These two oils each contain limonene and carvone, but each oil contains a different isomer of these chiral compounds.

这两种精油各自都含有柠檬烯和香芹酮，但每种精油都是由具有不同手性的柠檬烯和香芹酮的异构体所组成的，在这个实验课中，学生会接触到真空蒸馏操作。

By measuring the refractive index of the original oil, limonene and carvone fractions, you can estimate the purity of the respective fractions and the composition of the original oil.

通过测量原油，柠檬烯和香芹酮馏份的折光率，你可以估计一下原油的组份和各个馏份的纯度。

Using the refractive index data determine the approximate composition of your oil, your carvone fraction and your limonene fraction with respect to limonene and carvone

利用折光率的数据确定你的油中，你的香芹酮馏份和与柠檬烯和香芹酮有关的柠檬烯组份的大概成份。

Because the limonene does not have a carbonyl group, the small amount of it which remainsin the carvone fraction will not form a semicarbazone derivative.

由於柠檬烯没有羧基，留在香芹酮馏份中少量的柠檬烯将不会产生缩胺基脲的衍生物。

To ensure an optimal separation, three fractions should be collected: the limonene fraction, an intermediate fraction that forms during the rapid increase in temperature after collection of the limonene fraction, and the carvone fraction.

应该收集三个馏份以确保理想的分离效果：柠檬烯馏份，收集柠檬烯馏份后快速升温所产生的中间馏份以及香芹酮馏份。

After ultra high pressure treatment, limonene concentration was decreased greatly while myrcene and α-pinene concentrations were not changed significantly and the concentration of limonene was decreased by 75% after high pressure treatment of 500 MPa for 15 min,α-terpineol and carvone concentrations were increased significantly. The aldehydes concentrations were retained well. The ester concentrations were changed under high pressure treatment, but generally their concentrations were not changed remarkably.

通过定量检测分析发现：超高压处理对橙汁中的柠檬烯成分影响很显著，经500 MPa的压力处理15 min后其含量下降了75%，而月桂烯和α-蒎烯受高压影响较小；α-松油醇、香芹酮含量经高压处理后迅速增加；醛类特征香气成分基本不受高压影响；酯类成分在高压下会发生变化，但总体变化不显著。

Because the limonene does not have a carbonyl group, the small amount of it which remainsin the carvone fraction will not form a semicarbazone derivative.

由于柠檬烯没有羧基，留在香芹酮馏份中少量的柠檬烯将不会产生缩胺基脲的衍生物。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了