乙烯的

Objective To determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of Edaravone, by gas chromatography.Methods Sample solution was injected on a GDX column (0.18 mm～0.25 mm) with nitrogen as the carrier gas.The residue was calculated by the external standard method.

摘要］ 目的：用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量方法：采用固定相二乙烯苯乙基乙烯苯型高分子孔小球（直径为0.18 mm～0.25 mm），氮气为载气，用外标法测定乙酰乙酸乙酯中残留丙酮的含量。

Three novel rigid compounds 3, 6-bis[2-(4-pyridylethenyl]-9-ethylcarbazole (L~1), 3,6-bis[2-(2-pyridyl)ethenyl]-9-ethylcarbazole (L~2), 3,6-bis[2-(4-pyridyl)ethenyl]-9 -ethylpyridylcarbazole (L~3) were successfully synthesized by Heck reaction, which were fully characterized by elemental analyses, NMR, MS, IR spectra and single X-ray diffraction analysis.

利用Heck偶联反应，成功地合成了三种新型刚性的吡啶基咔唑类化合物：3，6-二[2-(4-吡啶基)乙烯基]-9-乙基咔唑(L~1)，3，6-二[2-(2-吡啶基)乙烯基]-9-乙基咔唑(L~2)和3，6-二[2-(4-吡啶基)吡啶基]-9-乙基吡啶基咔唑(L~3)，通过元素分析、核磁共振谱、质谱、红外光谱和单晶X-射线衍射等分析手段确证了它们的结构。

The catalytic property of polyvinylidene chloride polyethylene polyamine palladium complex (PVDC-DETA-Pd,PVDC-TETA-Pd,PVDC-TEPA-Pd)for Suzuki reaction of sodium tetraphenylborate with iodobenzene were examined under microwave heating.

本论文研究了聚偏二氯乙烯多乙烯多胺负载钯催化剂和PVDC二苯胺钯催化剂的制备、表征及其在微波条件下对Suzuki反应的催化性能。1。

The optimum processing is storage for eight days in 15℃,soaking for 50 minutes in 1.7g/L of ethephon. After processing, the limonin of the orangeand lemon degrade about 30% and 40% respectively.

乙烯利处理柠檬的最适组合为乙烯利浓度1.7g/L、浸果50min、15℃贮藏、贮藏8天，经处理后能将柠檬中的柠檬苦素降解40％左右。

Objective To analyse the correlation between changes of liver hemodynamies and liver fibrosis markers in patients with trichloroethylene medicamentous dermatitis and furthermore study the prognosis of these patients with liver disfunction.

目的 探讨三氯乙烯药疹样皮炎患者肝脏血流动力学参数改变与肝纤维化指标的关系，为判断三氯乙烯药疹样皮炎肝损害的程度知预后提供依据。

Furthermore,using oxaldehyde,make the emulsion crosslinked and form a kind of net structure,thus a new kind of water-resistant adhesive is created.

通过醋酸乙烯酯共聚改性的方法，用醋酸乙烯与丙烯酸系单体共聚，采用无皂乳液聚合，然后用乙二醛交联，使乳液形成网络结构，制备了一种新型耐水性胶粘剂，研究了共聚单体对乳液性能的影响，并采用DSC、透射电镜等对乳液结构及性能进行了测试。

A new kind of non-formaldehyde water-resistant emulsion is prepared by modifying polyvinyl acetate with the surfactant-free copolymerization to polymerize vinyl acetate and the acrylic acid monomers,and then by using oxaldehyde to make the emulsion crosslinked to form a kind of net structure.

通过醋酸乙烯酯共聚的改性方法，用醋酸乙烯与丙烯酸系单体共聚，采用无皂乳液聚合，后用乙二醛交联，使乳液形成网络结构，制备了一种无甲醛的新型耐水性乳液。

The mutation potential of ethephon was by investigated the micronucleus test of bone marrow polychromatophilic erythroblastsPCE cells and sperm shape abnormality test in mice.

为测定乙烯利对人体健康的影响，采用小鼠骨髓细胞微核试验和小鼠精子畸形试验分别检测了乙烯利对小鼠体细胞和生殖细胞的致突变性。

It has shown that the optimum condition to modify phenol-formaldehyde resin were phenol﹕formaldehyde﹕diethylene triamine 1﹕0.8﹕0.015, reaction temperature 95～105℃and reaction time 2h, when using diethylene triamine as modifying agent.

实验结果表明，以二乙烯三胺为改性剂时，制备改性酚醛树脂的最佳实验条件是：苯酚﹕甲醛﹕二乙烯三胺为1﹕0.8﹕0.015；反应的最高温度为95～105℃；反应时间2h。

The synthetic route is concise and convenient. In chapter four, a serial of dithienylethene derivatives containing substituted triphenylamine groups was synthesized with a concise route.

第四章通过Suzuki反应，制备了在噻吩环的5-位上有单三苯胺取代的二噻吩乙烯，和5-，5'-位双三苯胺取代二噻吩乙烯光致变色化合物。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。