三烯

XRD results reveal that the addition of HF decreases the defects in the crystal lattice of SAPO 34, which is proved by the two distinct double peaks at 2 θ=26°and 31° and other ...

以氟化氢三乙胺复合模板剂合成的分子筛，在催化甲醇制低碳烯烃反应中结焦速率降低，生成乙烯及丙烯的选择性则略有提高

Part Ⅱ: The evelopropanation reactions of both semi-stabilized telluronium and arsoniumylides with α,β--unsaturated ketones proceed smoothly.

第二部分：烯丙基、巴豆基、三甲基硅基烯丙基、肉桂基、苄基碲、胂两种叶立德与α，β-不饱和酮均可以成功地进行环丙烷化反应，并且表现出不同的立体选择性。

A desulfurization method is proposed for the removal of sulfur compounds from FCC gasoline by alkylation reaction of thiophenic sulfur with olefins over acid catalysts, and the higher boiling sulfur-containing products are removed by fractional distillation.

选择以噻吩的甲基取代衍生物(包括 2-甲基噻吩、3-甲基噻吩及 2，5-二甲基噻吩)与异丁烯的烷基化反应为模型反应，考察了经三氯化铝气相固载法改性的 CT175 树脂催化剂催化噻吩的甲基取代衍生物与烯烃的烷基化反应性能。

A series of modified polyurethane elastomer materials with different amino siloxane content were synthesized,which were based on polyoxypropylene glycol,aminoethyl aminopropyl poly,toluene diisocyanate and the curing agent dimethylsulfide toluylenediamine.

以聚氧化丙烯二醇或聚氧化丙烯三醇、氨乙基氨丙基聚二甲基硅氧烷、甲苯二异氰酸酯为原料在无溶剂条件下制备预聚体，利用二甲基硫甲苯二胺为固化剂合成一系列氨基硅油改性聚氨酯弹性体材料，并对材料的力学性能、耐热性、表面水接触角等性能进行了测试。

Advances in ethylene selective trimerization catalysts, especially composition, activity and cost of trimerization catalysts and their overall selectivity to 1-hexene.

对乙烯选择性三聚反应进行了论述，着重分析了催化剂的组成、活性、成本和1-己烯的总选择性，并展望了烯烃选择性齐聚反应的发展。

Copolymer of acrylamide and acryloyloxyethyl trimethyl ammonium chloride was prepared by dispersion polymerization in a salt solution.

摘 要：以丙烯酰胺和丙烯酰氧乙基三甲基氯化铵为共聚单体，采用分散聚合法在无机盐水溶液中制备了性能稳定的阳离子聚丙烯酰胺乳液。

Copolymer of acrylamide and acryloyloxyethyl trimethyl ammonium chloride was prepared by dispersion polymerization in a salt solution.

摘 要：以丙烯酰胺和丙烯酰氧乙基三甲基氯化铵为共聚单体，采用分散聚合法在无机盐水溶液中制备了性能稳定的阳离子聚丙烯酰胺水包水乳液。

The analysis results of FTIR , SEM, X-ray Diffraction and TG-DSC proved that,the existence of graft copolymerization between cassava starch and acrylamide was occured;the structures of cassava were destroyed during the copolymerizing; the structures of the copolymer were largely amorphous; within the range of 700℃,the thermal degradation process of the St-g-PAM was divided into three-steps, which was more complex than that of cassava.

FTIR、SEM、X射线衍射、TG-DSC分析结果表明木薯淀粉与丙烯酰胺已发生接枝共聚反应；木薯淀粉在接枝共聚反应中，结构被破坏，接枝共聚物的结构基本上为无定型结构；在700℃温度范围内，木薯淀粉丙烯酰胺接枝共聚物的热降解为三步降解历程，比木薯淀粉复杂。

The results showed that Kaidimycin was chemically neutral, macrocylic polylactones, stable and liable to dissolve into water and pyridine, slight to dissolve into methanol, ethanol and N-butanol, difficult to dissolve into ethyl acetate, acetone, benzene and chloroform. Chemical reaction of functional group of Kaidimycin showed that it had glycoside, amino acid and aldehyde, no reducing sugar, polypeptide and phenol.

凯地菌素属中等极性的、中性抗生素，极性纸层析结果与多烯类抗生素的纸层析结果相似：易溶于水、吡啶，微溶于甲醇、乙醇、正丁醇，不溶于乙酸乙酯、丙酮、苯、三氯化碳；对高温、光照和紫外处理有很好的稳定性；官能团反应试验结果发现，凯地菌素可能含有糖苷键、氨基酸伯氨基和醛基，不含有还原糖、多肽和酚基，高锰酸钾、浓硫酸反应与多烯大环内酯类抗生素的特性相似；并且依据纯品，采用生物法和分光光度法对摇床发酵液进行了效价的测定。

Phytochemical investigation on the acetone extract of the stems of K.oblongifolia led to the isolation of 49 compounds and 31 of them were identified.They were 20 lignans,(including 11 dibenzocyclooctadienes,8 spirobenzofuranoid dibenzocycloocta -dienes,1 other lignan),9 flavones,and 1 nortriterpenoid.Among them,4 were new compounds,1 was new natural products,and 8 compounds were isolated from this family for the first time.

通过对冷饭藤的藤茎化学成分的研究，从丙酮提取物中分离得到49个化合物，鉴定了31个化合物，包括木脂素类化合物20个(联苯环辛烯类木脂素11个，螺苯骈联苯环辛烯类木脂素8个，其他类型木脂素1个)，黄酮类化合物9个，降三萜类化合物1个，其中。4个为新化合物，1个新的天然产物，8个为本科首次报道。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。