簇

The equilibrious geometries and electronic structures of possible isomers of Si4N4 clusters are studied by using density functional theorywith basis sets 6-31G*.17 possible isomers are obtained.

用密度泛函理论中的杂化密度泛函B3LYP方法，在6-31G的水平上对Si4N4团簇的可能结构进行了几何结构优化和电子结构计算，得到了可能的17个异构体。

Any sedge of the genus Eriophorum; north temperate bog plants with tufted spikes.

羊胡子草属中的任何一种苔草；生长于北温带沼泽的一种植物，具有簇状的穗。

Several groups used gene clusters of Erwinia sp. for the expression in other hosts.

几个小组利用基因簇的软腐病菌藻为表达在其他主机。

In this research, we attempted to construct an SSH (suppression subtractive hybridization) library using the leaves of wild H. villosa (Gh21) inoculated by Erysiphe graminis and its susceptible EMS-induced mutant M14S with no inoculation.We screened 218 positive clones in the SSH library, and gained 60 ESTs after sequencing.

本研究应用抑制性消减杂交技术，以野生型簇毛麦(Gh21)及其感病突变体(M14S)为材料，建立白粉菌诱导的叶片的SSH文库，获得218个阳性克隆，对其中部分克隆测序，获得60个EST序列。

ErmE derived from Saccharopolyspora erythraea, which encodes a ribosome dimethyltransferase, was expressed in S. thermotolerans, to increase the substance resistance during the biotransformation of tylosin to AIV.

研究表明acyB2基因应该是碳霉素生物合成基因簇中的一个全局性正调控因子，它不仅负责对acyB1基因的正调控作用，而且还至少负责对acyA基因和红霉糖糖基转移酶基因的正调控。

Gas-phase reactions of Al〓 with ethanethiol molecule have been studied for the first time.

首次研究了Al〓和乙硫醇的气相化学反应，结果观察到了Al〓与1～6个乙硫醇分子形成的团簇离子。

This dissertation includes two parts. The first part deals with study on gas-phase reactions of metal ions with ethanethiol molecule by using the laser ablation-molecular beam method and density functional calculations. The second part describes experimental and theoretical study on VUV photoionization of some molecules using synchrotron radiation.

本论文分两大部分，第一部分介绍利用激光溅射-分子束技术研究金属离子与乙硫醇的气相反应，并用密度泛函理论研究了反应形成的团簇离子的结构和特性；第二部分介绍一些分子的真空紫外同步辐射光电离，结合量化计算分析了实验结果。

The many dark clusters of cells in the hepatic parenchyma are islands of extramedullary hematopoiesis typical for fetal liver.

在肝实质有许多细胞密集排列成簇，这些细胞是髓外具有造血能力的肝细胞岛。

Inflorescences fascicled cymes on second year branchlets or scattered at base of new branchlets.

花序簇生聚伞花序在第二年小枝或星散的在新小枝的基部上。

Flowers axillary, solitary or fascicled, sometimes in short terminal inflorescence.

腋生的花，单生或簇生，顶生的为短的花序的有时。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。