二聚

Chinensis by the methods of column chromatography (normal and reversed phase silica gel, Sephadex LH-20), preparative TLC and HPLC. On the basis of spectroscopic methods including IR, ESI-MS, 1-D and 2-D NMR, forty eight of them were identified as seventeen flavonoids, seventeen tritepenoids, one cumarin, five steroids and some benzene derivative etc.

中药射干为射干植物的干燥根茎，从中共分离出53个化合物，通过红外、质谱及核磁共振等波谱方法鉴定了包括12个新化合物在内的48个，结构类型分别属于iridal型三萜及其新颖的二聚体、异黄酮、黄酮及黄酮醇、香豆素、甾体、芳香酸和脂肪酸及其甘油酯等。

Soybean hypocotyls were treated with doses of UV-B at 8.22 kJ/m~(2d and 12.42 kJ/m~(2d UV-B radiation, corresponding to depletions in the stratospheric ozone of about 12 % and 20%, respectively, for a clear solstice day at Lanzhou city (36.04°N, 1550m),China.

报道表明增强 UV - B辐射会引起细胞 DNA形成嘧啶二聚体 [2 ] ，影响细胞正常代谢和分裂 [3] ，导致黄瓜子叶 [4 ] ，欧芹叶片 [5] ，小麦叶片 [6 ] 细胞分裂速度减慢。

Results Bulbus alkaloids easily formed molecular ions(superscript + in MS and dimerized easily in alcohol solution, which did not dimerize in acidity solution. Collision induced dissociation made these alkaloids easily lose a molecule of H2O. The MS spectra of the extracts of five Bulbu Fritillartae species indicated that the major molecular ions were similar to each other, but different varieties showed very different relative abundances of these molecular ions.

结果 在正离子一级质谱中，贝母生物碱易形成带一个正电荷的准分子离子，并且在中性醇溶液中，贝母生物碱易形成二聚体，在酸性介质中则无此现象；二级碰撞诱导解离易使贝母生物碱脱去一分子水；5种贝母对照药材的总生物碱提取液的一级电喷雾质谱图显示，主要分子离子峰基本相同，但因品种不同相对丰度差异较大。

The dimerized HDC was separated and formed spherical vesicles in 20% ethanol/water mixed solvents.

分离出来的二聚HDC在20%的乙醇/水混合溶剂中能形成球形的囊泡。

The phenol may optionally possess combinations of heteroatoms, such as O, N, P or S, and may be dimerized.

该酚可选择性地包含例如是O、N、P或S的杂原子的组合，其也可以是二聚物。

In fact, their incubation in a free cell system gives a stable dimerized form of alpha-synuclein that has been described as the critical rate-limiting step for its abnormal fibrillation.

事实上，他们在一个游离细胞系统培育产生一个稳定的Α-synuclein二聚物形式，已经被描述作为异常原纤维形成的关键限速步骤。

G. it is up to 80 eV when the cluster plane is parallel to the surface. In addition, the impact induced adsorption of C〓 cages was studied in detail. After impacting, the normal incident C〓 was found to move laterally on the surface due to the anisotropic interaction between the dimerized surface and the cage. Finally, it resided on the top of a dimmer or in the trough, which are the energy favored adsorption sites.

在能量为10-20eV的C〓富勒烯表面吸附动力学过程的研究中，我们还发现表面结构的不对称性会引起团簇-表面相互作用的各向异性，从而导致入射团簇在表面上有与入射方向垂直的的横向运动，最后吸附在两个二聚体的中心点和谷点，这两个位置是能量最低的的吸附组态。

In compound 1, two independent other than dimerized copper-phenanthroline graups are fused to the oxggen atoms in the vacant site of the mono-lacunary polyanton in parallel.

该化合物分子中2个独立的非二聚体的铜－邻菲啰啉平行地与缺位多酸空穴外的氧配位键合，通过元素分析、红外光谱、热重分析和X射线单晶衍射对其结构进行了表征。

We proposed two one-dimensional diatomic chain (i.e.complex-lattice) Frenkel-Kontorova models to simulate the 2×N reconstruction inthe dimerized overlayer systems with vacancies.

为了模拟有空位二聚物表层系统的重构现象，我们提出了两个一维双原子链FK模型。

I. Design and selection of thc high affinity DNA ligands for singIe-chain reprcssorSingle-chain repressor RRn., is a derivative of bacteriophage 434 repressor,which contains covalent1y dimerized DNA-binding domains (axnino acids 1-69) of thephage 434 repressor.

一。设计和筛选单链阻遏蛋白的高亲和力DNA结合序列单链阻遏蛋白RR_是噬菌体434阻遏蛋白的衍生物，它是噬菌体434阻遏蛋白的N端DBD（1—69位氨基酸）组成的共价二聚体。

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。