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secondary building
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     Mesoporous molecular sieves with the structure of MCM-41 have been synthesized in alkaline situation,by using the cationic surfactants of low concentration(n(CTAB)/n(SiO_2)=0.05,n(CTAB)/n(H_2O)=8.3×10(-4)) as template and the gel contaning secondary building units of β zeolite as precursors.
     在表面活性剂浓度很低(n(CTAB)/n(SiO2)=0.05,n(CTAB)/n(H2O)=8.3×10-4)的合成体系中,从具有β沸石次级结构单元的溶胶前驱体出发,在碱性条件下合成了高度规整六方排列的介孔分子筛。
短句来源
     Mesoporous aluminosilicates with the structure of MCM-41 were synthesized in alkaline media using the cationic surfactants of CTAB of very low concentration(CTAB/SiO_2=0.06)as the template and the gel containing secondary building units of L zeolite as the precursors.
     以极低浓度n(CTAB)∶n(SiO2)=0 06的阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)为模板,以具有L沸石次级结构单元的溶胶为前驱体,在碱性条件下合成介孔分子筛L MCM 41。
短句来源
     Synthesis of mesoporous molecular sieves with secondary building units of L zeolite
     含L沸石次级结构单元的介孔分子筛的合成
短句来源
     SYNTHESIS OF MESOPOROUS MOLECULAR SIEVES WITH SECONDARY BUILDING UNITS OF β ZEOLITE AT LOW SURFACTANT CONCENTRATION
     低浓度表面活性剂条件下合成含β沸石次级结构单元的介孔分子筛
短句来源
     Synthesis of Mesoporous Molecular Sieves with Secondary Building Units of Y Zeolite by Using Surfactants in Low Concentration as Template
     在低表面活性剂浓度下合成含Y沸石次级结构单元的介孔分子筛
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  “secondary building”译为未确定词的双语例句
     It crystallizes in the monoclinic,space group P21212,with a=0.8671(1)nm,b=1.7945(1)nm,c=0.9101(1)nm,β=108.33(1)°,V=1.3443(2)nm3 and Z=4.The three-dimensional nanoporous network is built up from two different secondary building units(SBU-1 and SBU-2).
     Hit-5属正交晶系,P21212空间群,晶胞参数:a=0.8671(1)nm,b=1.7945(1)nm,c=0.9101(1)nm,β=108.33(1)°,V=1.3443(2)nm3,Z=4。
短句来源
     Application of GBF pile in secondary building project of Shenzhen City Committee
     GBF高强薄壁管在深圳市委辅楼工程中的应用
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     Zn_5(μ~3-OH)_2(trans-chdc)_4 (3)Compound 3 is constructed from a infinite rod-shaped Zn-O-C secondary building unit interconnected by -C_6H_(12)- cyclohexane rings of the ligands.
     2.利用水热合成技术,由d10过渡金属锌和1,4-环己二羧合成3D的配位聚合物Zn_5(μ~3-OH)_2(trans-chdc)_4 (3)。
短句来源
     Quasi-solvothermal syntheses and X-ray crystal structures of two germanates (H 3O) 4Ge 7O 16·3H 2O and K 4Ge 9O 20 are presented. Although both structures are built up from the same rock-like secondary building units (SBUs) Ge 10O 28, the frameworks are different because of the different connect manners of SBUs.
     在半水溶剂热条件下 ,采用不同的合成条件合成了两个锗酸盐微孔分子筛 :(H3O) 4Ge7O16 ·3H2 O和K4 Ge9O2 0 .X射线单晶结构解析表明 ,两个晶体结构具有相同的“火箭状”二级结构单元 (SBU) ,SBU的不同的连接方式导致了完全不同的空间结构 .
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     treatment is the key:design of the elevation of the secondary building of the Agricultural Exhibition Hall
     关键在于处理:农展馆辅助楼立面设计随笔
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  相似匹配句对
     Building bioinformatics secondary database with XML
     基于XML构建生物信息二级数据库
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     Comments on the Building of the Characteristics of Secondary and Primary School
     论中小学学校特色的创建
短句来源
     Memorial Building
     纪念性建筑
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     Meike Building
     美克大厦
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     The secondary disaster
     二次灾难
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  secondary building
Metal-carboxylate clusters are ideally suited as secondary building units (SBU) for the assembly of extended open frameworks.
      
The complex framework is built from two types of secondary building unit (SBU): one hexamer [Fe3F2(H2O)2(PO4)3$] (SBU6), and one dimer [FeO4(H2O)2PO4] (SBU2).
      
In the framework of AlO4 tetrahedra, we have isolated a 12-atomic block of a new 3-6-3 type as a secondary building unit (SBU).
      
The molecular products obtained not only have a structural relationship to secondary building units in phosphate and arsenate materials, but these molecular species may act as models of and precursors to the solid state materials.
      
Tri-metal Secondary Building Units: Toward the Design of Thermally Robust Crystalline Coordination Polymers
      
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When a tall building group consists of a primary(tallest)building and one or several secondary(lower) buildings, these buildings can be coupled with link structures to obtain convenient and direct aerial passageway. From a viewpoint of earthquake resistance, the vibration of the primary building can be reduced if the equivalent natural period of the secondary building coincides with the excitation period of earthquake or wind action. At the same time, the vibration amplification of the secondary building...

When a tall building group consists of a primary(tallest)building and one or several secondary(lower) buildings, these buildings can be coupled with link structures to obtain convenient and direct aerial passageway. From a viewpoint of earthquake resistance, the vibration of the primary building can be reduced if the equivalent natural period of the secondary building coincides with the excitation period of earthquake or wind action. At the same time, the vibration amplification of the secondary building is near to its minimum instead of maximum. Hence the dynamic response of total building group under excitation can be much reduced through the vibration absorption of the secondary building. Some examples are calculated and the curves of dynamic response versus frequency are compared.

对于由主楼和一个或多个辅楼组成的高层楼群,当楼群之间通过空中交通连接结构使各高楼 耦联时,如果调整辅楼的刚度和质量,使辅楼的等效自振周期与场地地震动卓越周期接近,则可以 使主楼的振动反应达到最小,实现消振的目的;同时辅楼的振动幅值也接近最小值,而并不会达到最 大值,根据实例计算绘制的动力反应随频率变化的曲线证明了这一结论。

Mesoporous molecular sieves such as hexagonally ordered MCM- 41 have potential applications in catalysis,adsorption and separation,preparation of advanced materials,and molecular devices since they are firstly discovered in1 992 .However,as compared with zeolites,the acidity and hydrothermal stability of these mesostructured materials are relatively low,which strongly affecttheir practical applications in in- dustrial catalytic reactions of petroleum.Here it is systematically summarized that the research...

Mesoporous molecular sieves such as hexagonally ordered MCM- 41 have potential applications in catalysis,adsorption and separation,preparation of advanced materials,and molecular devices since they are firstly discovered in1 992 .However,as compared with zeolites,the acidity and hydrothermal stability of these mesostructured materials are relatively low,which strongly affecttheir practical applications in in- dustrial catalytic reactions of petroleum.Here it is systematically summarized that the research work on improvement of acidity and hydrothermal stability forordered mesoporousmaterials,which include( 1 ) the assembly of super acidic components into the mesopores;( 2 ) the addition of inorganic salts,organic am- monium compounds during the synthesis of mesoporous materials or post- synthesis of mesoporous materi- als;( 3) the synthesis of mesoporous materials from novel templates such as triblock copolymers;( 4 ) the assembly of mesoporous materials from pre- formed zeolite structure- directing- agent( zeolite seeds solution) with zeolite primary and secondary building structure units.

介孔分子筛材料在催化、吸附与分离以及化学组装制备先进材料和分子器件等方面具有潜在的应用价值 .但是 ,由于介孔分子筛材料较低的水热稳定性和较弱的酸性 ,极大地影响了其在催化研究中的广泛应用 .本文系统地综述了最近几年在提高介孔分子筛酸性和水热稳定性的研究工作 .其中包括 :(1 )将超酸组份负载于介孔分子筛的孔道中以达到提高介孔分子筛材料的酸强度的目的 ;(2 )通过在合成介孔分子筛的过程中加入无机盐和有机胺等助剂或采用合适的后处理方法以提高介孔分子筛的水热稳定性 ;(3 )通过新型模板剂来合成具有较高水热稳定性的介孔分子筛材料 ;(4 )利用具有沸石分子筛基本结构单元的沸石分子筛导向剂与表面活性剂自组装来合成具有强酸中心和高温水热稳定的介孔分子筛材料

Mesoporous aluminosilicates with the structure of MCM-41 have been synthesized in alkaline situation, by using the mixture of cationic and anionic surfactants in very low concentration (x_(surf)/x_(SiO_2)=0.07) as template and the gel containing secondary building units of Y zeolite as precursors. XRD, FT-IR and N_2 adsorption and desorption isotherms prove that this material has ordered hexagonal structure with Y zeolite secondary unit in its pore walls, which are thicker than the walls of MCM-41...

Mesoporous aluminosilicates with the structure of MCM-41 have been synthesized in alkaline situation, by using the mixture of cationic and anionic surfactants in very low concentration (x_(surf)/x_(SiO_2)=0.07) as template and the gel containing secondary building units of Y zeolite as precursors. XRD, FT-IR and N_2 adsorption and desorption isotherms prove that this material has ordered hexagonal structure with Y zeolite secondary unit in its pore walls, which are thicker than the walls of MCM-41 materials synthesized by normal hydrothermal ways. SEM images shows a very unusual net-like morphology of the material, different from the common loose shape of MCM-41. After being treated in 100% water vapor at 600 ℃ for 10 h, the structure of mesopore can still be sustained, showing high hydrothermal stability.

以表面Mol比很低(xsurf/xSiO2=0.07)的阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)和阴离子表面活性剂(SL)的混合水溶液为模板,以具有Y沸石次级结构单元的溶胶为前驱体,在碱性条件下合成了孔道结构类似于MCM 41的介孔分子筛.样品的XRD、FT IR、N2吸附 脱附、SEM等表征表明合成的介孔分子筛是孔壁含Y沸石次级结构单元的六角相结构,该介孔分子筛的孔壁厚于常规水热方法得到的MCM 41材料的孔壁,它的形貌有别于常规水热方法得到的MCM 41的疏松形貌,为网状交叉结构.对样品水热稳定性的考察显示,在600℃100%水蒸气下处理10h,仍然可以保持其中孔结构.

 
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