烯

Attributed to the lubricant-effect of flexible LCPB,cold crystallization was observed in stereoblock PB.Bd-Ip block copolymersHTPB-b-PI,C-(PI-b-HTPBn,C-n,and PI-b-HTPB -b-PI and Bd-St block copolymersHTPB-b-PS,C-(PS-b-HTPBn,C-n, and PS-b-HTPB-b-PS containing crystallizable HTPB were well synthesized,the microstructures and properties of the copolymers were investigated in detail.

加热器通过与异戊二烯或者苯乙烯共聚，合成了含高反式聚丁二烯的丁二烯-异戊二烯嵌段共聚物包括HTPB-b-PI，C-(PI-b-HTPBn，C-n和PI-b-HTPB-b-PI和丁二烯-苯乙烯嵌段共聚物包括HTPB-b-PS，C-(PS-b-HTPBn，C-n和PS-b-HTPB-b-PS，对嵌段共聚物的结构和性能进行了系统的研究。

Cuspidate with 33％ identity and 50％ similarity to taxadien-5α-ol-O-acetyltransferase, 34％ identity and 52％ similarity to 10-deacetylbaceatin Ⅲ-10-O-acetyltransferase, and 33％ identity and 49％ similarity to taxane 2α-O-benzoyltransferase, respectively, moreover, it contained the conserved HXXXDG motif that is found in other transacylases, this sequence element has been suggested to function in acyl group transfer from acyl CoA to the substrate alcohol.

No.AF448807）在氨基酸水平与大部分植物来源的酰基转移酶具有较大的同源性，其中与东北红豆杉紫杉二烯-5α-醇-乙酰转移酶的一致性达33％、相似性达50％，与东北红豆杉紫杉10-去乙酰巴卡亭Ⅲ-10-0-乙酰转移酶的一致性达34％、相似性达52％，与东北红豆杉紫杉二烯2α-0-苯甲酰转移酶的一致性达33％、相似性达49％，并且在TS4的氨基酸序列中还发现酰基转移酶家族成员特有保守序列HXXXDG，这个序列单元被认为在将酰基CoA转移至醇类底物的过程中发挥作用。

The photocycloaddition of 1-naphthonitrile (1-NpCN) and 2,3-dimethyl-2-butene in cyclohexane or benzene gave cyclobutane 3 primarily,but that of 2-NpCN gave azetine 6 asthe major and cyclobutane 5 as the minor product in low conversion photolysis.

在低转化光解情况下，1-萘甲腈(1-NpCN)和2，3-二甲基丁烯-2在环已烷或苯中的光环加成反应主要得到环丁烷3，但2-NpCN主要得到氮杂环丁烯6和少量的环丁烷5，三氟醋酸量增加抑制1-NpCN和DMB的光环加成反应，表明TFA与基态及单激发态1-NpCN生成非光反应的复合物，它也淬灭(1-NpCN-DMB)激基复合物。

The photocycloaddn. of 1-naphthonitrile (1-NpCN) and 2,3-dimethyl-2-butene in cyclohexane or benzene gave cyclobutane I primarily, but that of 2-NpCN gave azetine II as the major and cyclobutane III as the minor product in low conversion photolysis. The photocycloaddn. of 1-NpCN with DMB is retarded by increasing amts. of trifluoroacetic acid which is shown to form non-photoreactive complexes with ground state as well as with singlet excited state 1-NpCN. It also quenches the *(1-NpCN-DMB) exciplex.

在低转光解情况下，1-萘甲腈(1-NpCN)和2，3-二甲基丁烯-2在环已烷或苯中的光环加成反应主要得到环丁烷3，但2-NpCN主要得到氨杂环丁烯6和少量的环丁烷5，三氟醋酸量增加抑制1-NpCN和DMB的光环加成反应，表明TFA与基态及单激发态1-NpCN生成非光反应的复合物，它也淬灭^*(1-NpCN-DMB)激基复合物。

Great progress in benzene selective hydrogenation to cyclohexene has been made in recent years. So it was very important for research and development of its downstream products.

摘 要：近年来我国在苯选择加氢制取环己烯的研究领域取得了很大的进展，环己烯下游产品的开发研究具有十分重要的意义。

Selective hydrogenation of benzene to cyclohexene over Ru is the best method to obtain cyclohexene.

苯选择加氢合成环己烯的方法是大批量获得环己烯的最佳方法。

The background of developing catalytic technology for partial hydrogenation of benzene to cyclohexene and the progress in its investigation at home and abroad are introduced briefly.

简要介绍了苯部分加氢制环己烯催化技术的开发背景，国内外相关领域的研究进展，比较了不同的工艺路线，展望了环己烯的应用前景。

The preparation and characterization of a novel Ru-Zn catalyst for selective hydrogenation of benzene to cyclohexene have been carried out in this paper.

苯选择加氢制环己烯具有原子经济性和环境友好等特点，开展苯选择加氢制环己烯催化剂的研究具有重要的应用价值和一定的学术意义。

The result was compared with oxidations of cyclohexene without irradiation and at irradiation without catalyst.

另外，本文还研究了各种类型的催化剂在中压汞灯下光催化环己烯的氧化反应，结果表明，无论上述的哪种催化剂，在中压汞灯下光催化环己烯氧化反应，都得不到环氧环己烷，生成的产物主要为水和二氧化碳。

These results were veryreasonable considering the fact that cyclohexene and 1-octene can not bepolymerized with Ziegler-Natta catalyst.

产物的FD-MS分析结果表明：〓和辛烯-l的加成物为加成数从1到16的混合物；〓和环己烯主要生成加成数为9的加成物。

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