结构单元

The outer surface of sea cultured pearl's nacre is composed of polygonal tablet of aragonite and organic matrix sheet.

海水养殖珍珠的表层微形貌呈现以文石晶体及壳角蛋白膜为结构单元组成的按一定方式排列的层状或阶梯状的结构或形态。

A systematic analysis of the various combinations of the hexagonal, boat, and pentagonal star in the crystalline approximants of decagonal quasicrystal has been made. This was compared with the structural subunits in some approximants observed by high-resolution electron microscopy.

系统地分析了二维十重准晶的近似晶体相中六角、船形和五角星等结构块的不同排列组合，并与我们已用高分辨电子显微镜观察到的一些近似相中的结构单元进行了比较。

Locust bean gum is a kind of the structure of galactose and mannose residues as a structural unit of the polysaccharide compounds.

刺槐豆胶的结构是一种以半乳糖和甘露糖残基为结构单元的多糖化合物。

If Al or Ni being regarded as the center, the Gaskell polyhedron, trigonal prism capped by three half octahedra, can be obtained.

虽然这种结构类似于Gaskell提出的金属-类金属非晶的局域结构单元，但具体的堆垛模式发生了改变。

Superscript 3C NMR spectra for metallocene polyethylenes were measured to confirm the existence of various branches from methyl to hexyl end longer chains and other structural units. DRI from rheological data were used to determine the level of long chain branching in mPEs, and the results were compared with each other.

采用高分辨度(上标 13)C NMR谱直接测定茂金属聚乙烯的支化度及其他微量异种结构单元的组成，并过流变数据获得DRI指数来表徵mPEs长支链结构；对二者的结果进行了比较。

It was found that theintrduction of polar phosphatidylcholine to LLA chains had largely changed thehydrophilicity of the synthesized polymers. And from the research ofendothelioid cell (ECV304) compatibility and adhesion of blood platelet, wefound that the cells adhesion of ECV304 on the films of PLLA-PC-PLLA lagedcomparing to PLLA, but then could proliferate and cover the films in total,PLLA-PC-PLLA, the same as PLLA are not cytotoxicity and ECV304 canattach and proliferate on them, and PLLA-PC-PLLA can reduce the adhesion ofblood platelet.

结果表明：由于聚乳酸中磷脂酰胆碱结构的引入，使得该材料的亲水性得到很大的改善，并且随着聚合物中磷脂结构单元比例的增高其亲水性能就越好；通过对该材料进行细胞亲和性的实验研究，发现这种材料能够使细胞锚着并支持细胞的增殖；而血小板黏附的实验结果初步显示了该材料具有较好的抗血小板黏附的性质。

The amphiphiles, 4-8, can not form reverse bilayers in organic solvent, which result in that the molecular interactions unable to meet the need for hydrophile-lypophile balance, so that they crystallize and exhibit no gelling abilities. The mono-chained L-alanine derivatives, 1-3, can self-assemble into bilayer aggregates, through intermolecular hydrogen bonding and homochiral effect in a number of organic liquids, which are juxtaposed and interlocked by van der Waals interaction, and finally gelate the organic liquids.

单链酰基化L-丙胺酸两亲物1-3在一些低极性的有机溶剂可以通过分子间氢键相互作用及同手性聚集作用形成有序的反双分子膜结构，这些有序反双分子膜结构单元依靠vander Waals力相互作用可以平行排列且相互之间进行连结形成长纤维状的聚集体，纤维状聚集体在有机介质中可以进一步相互连结形成三维网状结构，进而胶凝有机溶剂。

The structure models of zirconium sulfate tetrahydrate and silica have been built. The binding morphology, charge distribution and energy change were also studied. It is deduced that the strong interactions between the active composition and support through hydrogen binding and dehydrate mode promise that zirconium sulfate tetrahydrate can disperse uniformly on the surface of support.

在对硅胶表面结构单元和四水硫酸锆单体空间模型结构参数进行优化的基础上，依据四水硫酸锆与硅胶载体表面的成键状态、电荷布居及能量变化，从理论上分析了四水硫酸锆与载体表面之间静电和脱水的相互作用的合理模型及硅胶负载型硫酸锆的结构稳定性，阐明了硫酸锆在载体表面的分散趋向于单分散的特征。

The first major achievement is obtained with the estabilishment of the state-space method used for 3-D flutter analysis of bridge structures, which works out a solution suitable to many complicated situations, such as ununiform distribution of wind speed field, complex types of the structural systems and different cross sections of decks.

所建立的桥梁颤振分析的状态空间法，不仅通用性强，可以考虑风速场是非均匀的，结构本身是非直线状的，结构单元是多样的等复杂情况，而且计算工作量少，并能提供在整个亚临界区直至临界区结构动力特性随风速而变化的信息。

The N-terminus of the ZNF394 coding region has a well-conserved Kruppel-associated box domain and adjacent to an ami no-terminal SCAN domain (or leucine-rich region), whereas the C-terminus contains 7 CsHz zinc finger motifs in tandem arrays with the highly conserved space region of the H/C-link.

该基因在N端含有一个高度保守的SCAN型结构域，相邻一个KRAB框型结构域，并且在其c端具有非常保守空间的7个连续的C2H2型锌指结构单元，通过对人类成体组织进行Northern杂交，得到一个大约为2。

The big eared hedgehog, the little owl, the sand gecko, the three-toed jerboa, and every show needs a villain - saw-scale - the viper!

大耳刺猬，小猫头鹰，沙壁虎，三趾跳鼠，每场戏都需要反派角色：蝰蛇。

Plasmodiophora brassicae ; resting spores ; density gradient centrifugation of sucrose ; ultrasonic disruption

根肿；休眠孢子；蔗糖密度梯度离心；超声波破碎