烯酮

Flavor substances of pumpkin were qualitatively analyzed and 22 kinds of chemical components were identified by GC-MS. The main compounds extracted are Bornyl acetate, Camphol and 4-methy- Phenol, respectively.

首次对南瓜(6号京银栗)进行了芳香物质的定性测定，发现南瓜中含有22种芳香性成分，主要为醋酸冰片酯、樟脑、四甲基苯酚、4，6，6-三甲基-双环[3.1.1]-3-庚烯-2-酮。

In the chapter four,the main study was focused on [60,70]fullerene reaction with 4,4,5,5-tetramethylidazoline- 2- thione and DL- valine and other α-aminoacids. The results ofcharacterization showed that it was a carbene reaction. The possible mechanism wasput forward based on the results of characterization.

第四章，主要研究了[60，70]富勒烯，4，4，5，5-四甲基咪唑啉-2-硫酮与DL-缬氨酸和其它氨基酸的反应，通过对反应产物的详细的表征，发现该类反应是一个产生卡宾的新反应。

STUDIES ON PLANT PHOSPHOENOLPYRUVATE CARBOXYLASE——Ⅵ.

植物磷酸烯醇式两酮酸羧化酶的研究——Ⅵ。

In the leaves, the mesophyll cells surrounding the vascular bundles contain the carbon dioxide-fixing enzyme phosphoenolpyruvate carboxylase in their cytoplasm.

在叶片中，叶肉细胞包围着维管束，叶肉细胞细胞质中所包含的磷酸烯醇式丙酮酸羧化酶，具有比核酮糖二磷酸羧化酶更高的的与二氧化碳的亲和力。

A hydrophilic positively charged nanofiltration membrane was prepared by UV irradiation graft polymerization of diallydimethyl ammonium chloride onto the surface of ultrafiltration membranes made of polyetherketone cardo.

通过在酚酞基聚芳醚酮超滤膜表面紫外辐照接枝亲水性单体二烯丙基二甲基氯化铵制备了一种表面荷正电的纳滤膜。

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。

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。

Plug in your data and determine the value of xcarvone for the limonene and carvone distillation fractions and the oil itself. Compare these results with those obtained by GC.

把你的数据组合起来，然后确定在柠檬烯，香芹酮馏份和油本身的xcarvone的值，将这些数据和气相色层分析的数据比较一下。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。