吡咯烷

To establish a method for determination of cyclopentadiene,dimethylformamide and N-methylpyrrolidone simultaneously in isoprene by GC.

用毛细色谱法建立异戊二烯中各组分定性分析方法及环戊二烯，N-甲基吡咯烷酮，N，N-二甲基甲酰胺的测定方法。

Ingredients: water,decyl glucoside,glycerin,sodium cocoamphodiacetate,sodium pca,polysorbate-20,cocamidopropyl betaine,carya illinoensis powder,panthenol,carbomer,aloe barbadensis leaf juice,lavandula angustifolia oil,perfume,tetrasodium edta,lactic acid.

主要成份：去离子水，葵基葡聚糖，甘油，椰油两性二醋酸二钠，吡咯烷酮羧酸钠，聚山梨醇酯-20 ，椰油酰胺丙基甜菜碱，核桃粉，泛醇，卡波姆，芦荟叶萃取物，薰衣草精油，香精，乙二胺四乙酸四钠，乳酸。

With benzoic acid, terephthalic acid, 2. 6naphthalene dicarboxylic acid, dimethyl-2, 6-naphthalene dicarboxylate as solutes, water, acetic acid, N, N-dimethylformamide, N, N-dimethylacemide, dimethyl sulphoxide, N-methl2-ketopyrolidine, and the mixture of water and acetic acid as solvents respectively, the solubilities of 15 binary systems and 4 ternary systems were determined.

实验以苯甲酸、对苯二甲酸、2，6-NDCA、2，6-萘二甲酸二甲酯为溶质，以水、醋酸、N，N-二甲基甲酰胺、N，N-二甲基乙酰胺、二甲基亚砜、N-甲基-2-吡咯烷酮以及水和醋酸的混合溶液为溶剂，测定了十五个二元物系和四个三元物系的溶解度数据。

By using AM1 semiempirical quantum calculation method, the structures and electronic properties of N-methyl- pyrrolo[3,4]C60 and N-methyl-2-(2'-dimethylaniline- substituted dithienylen-thylene)- pyrrolo[3,4]C60 have been studied.

利用半经验AM1量子化学方法研究了N－甲基－吡咯烷并[3，4]C60及其噻吩取代衍生物的几何结构。

Two kinds of hybrid composite resins and two kinds of polyacid-modified composite resins (Dyract AP and F2000)were made into discal restorations, which were divided into 4 groups and each group were then divided into 5 subgroups.

分别以卡波姆和聚乙烯吡咯烷酮作为漂白剂的增稠载体，以11％和15％的CP作为漂白活性成分，配制漂白剂。

for preparing n-boc or n-cbz derivatives of chiral alpha,alpha'-disubstituted pyrrolidines containing olefinic bond and acetylene bond

一种制备含烯键和炔键取代基的手性α，α'-二取代吡咯烷的n-boc或n-cbz衍生物的方法

The thesis chose 4, 4\'-diazostilbene-2, 2\'-disulfonic acid disodium saltas cross-linking agent to crosslink poly in commercialNafion117 membranes under the irradiation of ultraviolet.

本论文选择4，4'-双叠氮菧-2，2'二磺酸钠为交联试剂，以紫外光引发，使聚乙烯吡咯烷酮在Nafion膜中发生交联，从而制备了semi-IPN型Nafion／PVP复合膜。

The efficient synthesis of 2 (12 aminotridecyl)pyrrolidine (1), a new defensive alkaloid of Mexican bean beetle, Epilachna varivestis, has been achieved by employing the Wittig reaction as key step and 1 bromo 11 ethylenedioxyundecane as precursor of phosphonium bromide.

2- (12 -氨基十三烷基)吡咯烷(1)是从墨西哥大豆瓢虫 Epilachna varivestis中分离的新防卫生物碱。

Then sodium ethoxide was used as base,the nucleophilic substitution of 2-pyrrolidone with the intermediate provided nefiracetam.

以碳酸钠为缚酸剂，摩尔比为1︰1的2，6-二甲基苯胺与氯乙酰氯反应合成了中间体2-氯-N-(2，6-二甲基苯基)乙酰胺；在强碱乙醇钠作用下，2-吡咯烷酮再与2-氯-N-(2，6-二甲基苯基)乙酰胺经亲核取代合成了目标化合物奈非西坦。

Most of fluorenyl cardo polyimides exhibited excellent solubility in common organic solvents such as m-cresol,chloroform(CHCl_3), tetrahydrofuran,N-methyl-2-pyrrolidinone,N,N-dimethylacetamideetc and intrinsic viscosity in N,N-dimethylacetamideranged from 0.31-1.00dL/g.

大部分芴基Cardo型聚酰亚胺可以溶解在间甲酚，氯仿(CHCl_3)，四氢呋喃，N—甲基吡咯烷酮，N，N—二甲基乙酰胺等有机溶剂内，在DMAc内的特性粘度范围为0.31～1.00dL/g。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。