色环

HPLC was coupled with both mass spectroscopy and ultraviolet absorption spectroscopy for simultaneous separation and characterization of the products from glow plasma reaction of chloroform.(3) Phosphorus pentachloride has been used to perchlorinate acenaphthene under moderate pressure and temperature in sealed reaction vessels.

在此基础上，以反相C〓柱为固定相，甲醇/乙醇/环己烷为流动相，采用梯度洗脱的方法，对氯仿辉光放电合成产物进行高效液相色谱-紫外光谱-质谱联用分离分析，成功的分离得到包括富勒烯C〓和全氯代碳簇在内的数十种产物，并得到了相应的质谱和光谱数据。

One of them can efficient catalysed the alkene in the absence of dear additives by introducing an imidazole in the salen ligand.

其中分子内含咪唑的手性吡咯烷Mn催化剂成功实现了不加昂贵添加剂的情况下高效催化取代色烯环氧化反应。

This paper describes a method for the determination of polycyclic aromatic hydrocarbons in soil of green food producing area .

对绿色食品产地土壤中多环芳烃的气相色谱质谱联用分析法进行了研究。

Link necklace in aubergine and pomegranate resin with sterling silver. Small links, 32 long.

纯银小号茄紫色和红石榴色树脂扣环项链。32 英寸长。

A strain may be defined as an organic compound containing a benzene ring plus a chromophore and auxochrome group.

染料定义为含有苯环与呈色官能基与辅助成色官能基的化合物。

In the thesis, the nonlinear optical properties and the thermochromism of the azobenzene functional polydiacetylenes were investigated detailedly.

本论文通过改变间隔基长度和偶氮苯环取代基以及连接方式的方法，将光响应性偶氮生色团引入聚二乙炔。

Sometimes birds from "inland" reach Chi Gu, I have recorded Crested Goshawk, Bamboo Partridge, Black Bulbul, Collared Finchbill, Black-browed Barbet and Snowy-browed Flycatcher in Chi Gu before.

有时来自内陆的鸟会到达七股，我以前曾经在七股记录到凤头苍鹰，竹鸡，红嘴黑鹎，白环鹦嘴鹎，五色鸟以及黄胸青鶲。

Methods OASIS solid-phase extraction column was used to extract HP-HPLC in the plasma after basification; reverse high performance liquid chromatography was applied for determination.

血浆经碱化后，用OASIS固相萃取小柱提取血浆中丁螺环酮，采用反相高效液相色谱法紫外检测器检测。

During the study, an unreported Pd-catalyzed cross coupling substitution reaction was observed, and the relative theoretic discussion was made. The mesmorphic properties of all these compounds were observed and measured by polarizing optical microscopy and differential scanning calorimeters.

论文通过钯催化偶联反应合成了十一个系列74个全新的环己基炔类液晶化合物，利用元素分析、气相色谱、液相色谱等方法分析了化合物的纯度，利用红外光谱、核磁共振和质谱等分析手段对化合物的结构进行了鉴定。

Glycidyl benzoate,glycidyl propionate,glycidyl acetate were obtained respectly through a phase-transfer catalytic methodology using sodium benzoate, sodium propionate, sodium acetate and epichlorohydrin as raw materials, and pure products were obtained though vaccum distillation.β-cyclodextrin and glycidyl benzoate, glycidyl propionate, glycidyl acetate, reacted in organic solvent and goal product were

先以苯甲酸钠、乙酸钠、丙酸钠和环氧氯丙烷为原料在相转移催化剂的作用下分别合成了苯甲酸缩水甘油酯、乙酸缩水甘油酯和丙酸缩水酯，经过减压蒸馏，得到相应的纯品；β-环糊精和苯甲酸缩水甘油酯、乙酸缩水甘油酯、丙酸缩水甘油酯在有机溶剂中反应，经过硅胶色谱柱分离，得到了相应的产品，产品经过TLC、IR、1H NMR、MS表征，并研究了温度、反应时间、催化剂等几个因素对反应工艺的影响，结果表明温度和催化剂对反应的快慢有较大影响。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。