铝族

A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors; one or more aluminum containing cocatalysts; a selectivity control agent comprising at least one silicon containing compound containing at least one C1-10 alkoxy group bonded to a silicon atom, and one or more activity limiting agent compounds comprising one or more aliphatic or cycloaliphatic carboxylic acids; alkyl-, cycloalkyl- or alkyl-ester derivatives thereof; or inertly substituted derivatives of the foregoing.

一种用于丙烯聚合的催化剂组合物，所述催化剂组合物包括：一种或多种齐格勒-纳塔主催化剂组合物，该主催化剂组合物包括一种或多种过渡金属化合物和一种或多种芳族二羧酸酯内部电子给体；一种或多种包含铝的助催化剂；选择性控制剂，该选择性控制剂包括至少一种包含硅的化合物，该化合物包括至少一种与硅原子连接的C 1-10 烷氧基；和一种或多种活性限制剂化合物，该活性限制剂包括一种或多种脂族或脂环族的单或聚羧酸类、其烷基-、环烷基-或烷基-衍生物、或上述惰性取代的衍生物。

Spodumene is a lithium aluminum silicate. It is a relatively rare pyroxene found mainly in lithium rich pegmatites.

锂辉石是一种锂铝硅酸盐，它是一种相对稀缺的辉石族成员（翡翠与锂辉石属于辉石里最有价值的一员），主要在富含锂的花岗伟晶岩出现。

From all possible members of the spinel groups, hercynite and galaxite, were found to be the most efficient.

在所有可能的尖晶石矿族成员中，铁铝尖晶石和锰铝尖晶石被发现是最有效的。

Such derivatives are prepared by reacting a kaolin group mineral with a reagent, such as, an alkali metal halide or an ammonium halide which converts the majority of the octahedrally coordinated aluminum in the kaolin group mineral to tetrahedrally coordinated aluminum.

这种衍生物是通过将高岭族矿物与一种试剂，例如一种碱金属卤化物或一种卤化铵进行反应，从而将高岭族矿物中的大部分六配位铝转化为四配位铝而制备的。

AlN is an important Ⅲ－Ⅴ compound semiconductor material with wide band-gap, which has wurtzite structure too.

氮化铝是一类重要的宽带隙Ⅲ－Ⅴ族化合物半导体材料，其晶体结构为纤锌矿型，同ZnO的晶体结构相同。

A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors; one or more aluminum containing cocatalysts; and a mixture of two or more different selectivity control agents, said SCA mixture comprising from 1 to 99 percent of one or more esters of one or more aromatic monocarboxylic acids or substituted derivatives thereof, and from 99 to 1 percent of one or more alkoxysilane compounds.

一种用于丙烯聚合的催化剂组合物，包括：一种或多种齐格勒-纳塔主催化剂组合物，该齐格勒-纳塔主催化剂组合物包括一种或多种过渡金属化合物和一种或多种芳族二羧酸酯内部电子给体；一种或多种包含铝的辅催化剂；和两种或更多种不同的选择性控制剂的混合物，所述SCA混合物包括1到99％的一种或多种芳族单羧酸的一种或多种酯或其取代衍生物、和99到1％的一种或多种烷氧基硅烷化合物。

A denitrifying oxide catalyst contains one prous metal carrier, ZSM-5 zeolite directly crystallized on said carrier and one metallic iron chosen from IB family or VIII family or their mixture. Said porous metal carrier contains at least one of prous Ni-Al, Fe-Al or Cu-Al alloys.

一种含ZSM－5沸石的脱氮氧化物催化剂含有一种多孔金属载体和直接晶化在该载体上的ZSM－5沸石和一种选自ⅠB族、Ⅷ族的金属离子或其混合物，所述多孔金属载体至少含有一种多孔镍－铝、铁－铝或铜－铝合金。

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。