丁二烯

The method of determination of trace acetonitrile in the extract of butadiene is introduced.

作为顺丁橡胶生产的原料，工艺控制要求丁二烯中检不出乙腈。

The study analysed levels of the toxicants butadiene and acrolein in urine, as well as looking for physiological markers of inflammation, oxidative stress and cardiovascular risk.

这项研究分析了尿液中丁二烯和丙烯醛的浓度，同时也寻求炎症，氧化应激和心血管疾病风险的生理性的生物标记物。

It is studied the particle diameter of polymer butadiene latex is effected of dissimilar agglutinant.

研究了不同附聚剂对聚丁二烯胶乳粒径的影响。

Two alkene of man is the important monomers of synthetic rubber and synthetic resin.

丁二烯是合成橡胶和合成树脂的重要单体。

The purpose is to calculate the butadiene's π MO by golden section relation and to get radio of positive and negative ions,whose coordination number is 4 by regular tetrahedron.

通过提出丁二烯πMO系数比的黄金分割系数和正四面体重心规律的具体应用，用黄金分割关系求出丁二烯的πMO；用重心规律求出配位数为4的正离子与负离子的半径比。

A series of acrylonitrile butadiene styrene terpolymers were synthesized by bulk polymerization using polybutadiene rubber as toughener. The mechanical properties of the resultant materials were investigated.

以聚丁二烯橡胶为增韧剂，用本体聚合方法合成了一系列丙烯腈--丁二烯--苯乙烯三元共聚物，并研究其力学性能。

Uncured natural rubber is sticky, easily deforms when warm, and is brittle when cold. In this state it cannot be used to make articles with a good level of elasticity .

一般需经过硫化的橡胶品种有丁二烯、氯丁二烯、异戊二烯的1，4-聚合物--顺丁、异戊、氯丁橡胶，以及共聚物丁苯、丁基和丁腈橡胶等。

Four hemicyanine derivatives,-N-(4-sulfobutyl)-4-[2-(4-N,N-dimethylamino-phenyl) etheny1] pyridinium (P1),-N-(4-sulfobutyl)-4-[2-(4-N,N-dimethylaminophenyl)-1,3-buteny1] pyridinium (P2),-N-(4-sulfobutyl)-4-2-(4-N,N-dimethylaminophenyl) ethenyll quinolinium (Q1) and-N-(4-sulfobutyl)-4-

合成了具有不同共轭链长度的吡啶盐类及喹啉盐类半菁染料-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基）乙烯基]吡啶鎓盐(P1、-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基）丁二烯基]吡啶鎓盐(P2、-N-（4-磺酸丁基）-4-[2-(4-N，N-二甲基氨基苯基)乙烯基]哇琳鎓盐(Q1)以及-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基丁二烯基]喹啉鎓盐(Q2)。研究了它们的光物理性质，并将它们用作TiO2纳米晶电极的光敏化剂引入光电化学电池。

Including high temperature for the pyrolysis of natural gas to produce carbon black and acetylene; steam reforming of natural gas or partial oxidation of natural gas, synthetic gas can be obtained; natural gas through chlorination, sulfide, nitrification, ammoniated oxide, oxidation can be obtained A N all kinds of derivatives; in the wet gas ethane, propane, butane and natural gas liquid condensate, and so on, the steam cracker or pyrolysis to produce ethylene, propylene and butadiene; dehydrogenation of butane oxidation or produce small Diene or acetic acid, methyl ethyl ketone, and maleic anhydride, and so on.

包括在高温下进行的天然气热裂解，主要生产乙炔和炭黑；天然气蒸汽转化或天然气的部分氧化，可制得合成气；天然气经过氯化、硫化、硝化、氨化氧化、氧化可制得甲烷的各种衍生物；湿性天然气中的乙烷、丙烷、丁烷和天然气凝析液等，经蒸汽裂解或热裂解可生产乙烯、丙烯和丁二烯；丁烷脱氢或氧化可生产丁二烯或醋酸、甲基乙基酮、顺丁烯二酸酐等。

Theoretical Study on the Reaction Mechanism for Diels-Alder Cycloaddition of C50 D(subscript 5h) with 1, 3-Butadiene and 2, 3-Disubstituted 1, 3-Butadienes

篇名 C50D(下标 5h与1，3-丁二烯及2， 3-二取代的1， 3-丁二烯的Diels-Alder环加成反应机理的理论研究

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。