烯

The geometric optimization of C_(59)Sm and C_(60)Sm shows that the replacement of a C atom with a Sm in C_(60) yields a stable substitutionally doped fullerene C_(59)Sm, and among the five possible optimized geometries for C_(60)Sm, the most favorable exohedral sites are above the center of a hexagon and a pentagon ring.

替代掺杂富勒烯C_(59)Sm与外掺杂富勒烯C_(60)Sm几何结构与电子结构分析表明，以Sm原子取代C_(60)分子中的一个碳原子后碳笼仍保持稳定的替代结构，而对五种可能的C_(60)Sm结构，Sm原子倾向于栖息在六碳环与五碳环的空洞上方。

Using spherical MgCl_2-supported superactive Ziegler-Nattacatalyst, polypropylene/ethylene-propylene copolymerin-reactor alloy can be prepared by two-stage polymerization process—a sequential homopolymerization of propylene followed by a downstream ethylene/propylene copolymerization.

用球形MgCl_2负载型高效Ziegler-Natta催化剂，经丙烯均聚—乙烯/丙烯气相共聚序贯反应工艺制备的聚丙烯/乙丙共聚物合金具有优良的抗冲击性能，是聚丙烯的重要高性能化改性品种，已实现大批量生产。

A new technology to synthetize trans-1,4-polyisoprene with bulk precipitation polymerization in the presence of supported Titanium catalysts was introduced, and the technogical process , its economical and qualty index were discussed.

简要介绍了采用负载钛体系催化异戊二烯本体沉淀聚合法合成高反式-1，4-聚异戊二烯的新技术、工艺流程和技术经济指标。

Determination of tartaric acid and maleic acid by high performance liquid chromatography

含有顺丁烯二酸酐与丁二烯或环戊二烯等加成物结构的不饱和聚酯树脂。

It is found that the stereochemistry of the reactions of telluronium allylide,crotonylide and trimethylsilyallylide with α,β-unsaturated esters and amides can be tuned by thechoice of reaction conditions.

利用反应条件的变化首次实现了烯丙基、巴豆基、含硅烯丙基碲叶立德与α，β-不饱和酯、酰胺进行环丙烷反应的立体化学调控，能高立体选择性地、高效率地合成两种不同几何异构体中的一个。

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。

Three results are obtained by an orthogonal experiment. The main components of essential oil in separating containerⅠare terpenoid, terpeneless compound is in separating container Ⅱ. Through second-level separation the technological conditions of de-terpene are: pressure 7MPa, temperature 32℃ in separating containerⅠ;pressure 4～5MPa, temperature 32℃ in separating containerⅡ. The optimum technological parameters of obtaining two essential oils are: particle size 0.60mm, pressure 10MPa, temperature 36℃, operating time 90 minutes. There are 1.46% and 1.88% essential oil in separating containerⅠand Ⅱ respectively.

通过正交试验表明：分离器Ⅰ中精油的主要成分是萜烯烃类化合物，分离器Ⅱ中精油的主要成分是由高级醇类、醛类、酮类、酯类等组成的含氧化合物；二级分离脱萜的适宜参数是：分离器Ⅰ的压力为7MPa，分离器Ⅱ的压力与循环压力相同，温度都为32℃；同时得到萜烯烃类精油和低萜精油的最优工艺组合是粒度0.60mm，萃取压力10MPa，萃取温度36℃，萃取时间90min，精油得率分别为1.46％和1.88％。

There is no significant difference of the relative content of the terpine volatiles between the trunk and needles, but there is difference between healthy and damaged trees, and also between different times and atdifferent breast perimeters.

油松萜烯类挥发性成分的相对含量在叶和干之间没有明显的差异，同时采样的其干部和叶部的萜烯类挥发成分的比例基本保持一致；不同径级的树干和不同的季节成分和结构有所差异，而林木受害后其挥发性成分有所差别。

Hydrogenated terpinene maleic anhydride was prepared by catalytic hydrogenation of terpinene maleic anhydride in the presence of Pd/C catalyst.

研究了反应温度，压力，催化剂用量等因素对萜烯马来酸酐催化加氢制备氢化萜烯马来酸酐合成工艺的影响。

PFN or PFH forms binary FBS with ethyl ether, tetrachloromethane, n-heptane and toluene respectively. The critical mutual soluble temperature depends on the contents of FBS.

全氟已烯和全氟壬烯可以和乙醚、正庚烷、四氯化碳和甲苯等有机溶剂形成氟两相体系，其互溶温度与组成有关。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。