三烯

In order to prepare bismaleimide/montmorillonite nanocomposites with high performance, Na-montmorillonite was modified with allyl-tri-phenyl phosphonium bromide via ion-exchange method.

通过离子交换法将烯丙基三苯基溴化交换到钠基蒙脱土的层间制备改性蒙脱土。

The forming mechanism of dihydrophenophosphazine by the interaction of Ph〓NH and PCl〓 was studied, and the possible forming mechanism of spiro phosphonium chloride in the same reaction system was also proposed.

讨论了二苯胺与三氯化磷的成环机理以及反应过程中螺磷杂环化合物的形成机制，提出5，10-二氢磷杂吖嗪-10-氧化物存在类"烯醇—酮式"互变异构现象。

It was also found that combined addition of α-pinene, pine oil alcohol and camphor, the inhibitors of monoterpenoid pathway, obviously improved taxol production.

同时发现单萜途径的抑制剂α-蒎烯与松油醇及樟脑三种物质一起添加对紫杉醇合成的促进作用显著。

The discovery of [60]fullerene made us to learn of a completely new world ofcarbon: from plane molecule of low symmetry to ball shape molecule of highsymmetry, from simple molecule to supermolecule of fullerene clathrate and fromone-dimensional superconductivity to three-dimensional superconductivity.

的发现使我们了解到一个全新的碳的世界，从平面低对称分子到全对称的球形分子，从简单的分子到富勒烯笼内包原子的超分子，从一维超导到三维超导。

The reaction of the compound - 3 - triaiylstannyl -1,1 - diphenyl - 2 - propenyl - 1 -ol with ICl,Br2,I2 formed organotin halides ,which reacted with KOH to form organotin oxide or hydroxide.

首次以非碳环醇-3-三芳基锡基-1，1-二苯基-2-丙烯基-1-醇[Ph_2 CCH=CHSnAr_3]和卤素或拟卤素发生取代反应得到卤化物，并以此合成了氢氧化物、氧化物和配合物。

Experimental results show that MTBE can be used to produce high puremesitylene instead of propylene.

本文结果表明，MTBE尾气可以用于代替丙烯生产高纯度均三甲苯。

The classes of these compounds included triterpenoid, diterponid, sesquiterpene, steroid, lignan, flavone, coumarin, phenol, and fatty acid.

已鉴定的化合物类型涉及单萜、环烯醚萜、倍半萜、二萜、三萜、木脂素、黄酮、脂肪酸、甾醇、香豆素、酚酸和其它类型的化合物。

RESULTS: Four constituents were elucidated as β-sitosterol, eriantic acid B, 2α, 3α, 24-trihydroxyurs-12-en-28-oic acid and daucosterol.

结果：分得4个化合物，分别鉴定为β-谷甾醇，毛花猕猴桃酸B，2α，3α，24-三羟基-12-烯-28-乌苏酸和胡萝卜苷。

Squalene synthase（EC.2.5.1.21, SS）is an important key enzyme in biosynthesis pathway of plant sterols and terpenoids.

鲨烯合酶（EC.2.5.1.21，squalene synthase，SS）是植物甾醇和三萜化合物生物合成途径中的关键酶。

BMSCs expressing Ad-GFP had three types of subpopulation structures under a fluorescence microscope; when the virus titer was ≥ 1×10^6 PFU/mL, BMSCs proliferation was suppressed at the early stage, in a dose-dependent manner.

荧光显微镜下可见表达Ad—GFP的BMSCs有三种亚群结构：滴度≥1 10^6PFU／mL时，BMSCs增殖在早期受到抑制，且呈剂量依赖；转染Ad—GFP的BMSCs经β一巯基乙醇诱导可分化为神经元样细胞，神经元特异性烯醇化酶阳性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐