阴离子的

The present invention relates to a process for rapid solution synthesis of a peptide, the process comprising repetitive cycles of steps-: a coupling step, using an excess of an activated carboxylic component to acylate an amino component, a quenching step in which a scavenger is used to remove residual activated carboxylic functions, wherein the scavenger may also be used for deprotection of the growing peptide, one or more aqueous extractions and optionally, a separate deprotection step, followed by one or more aqueous extractions, characterised in that the process comprises at least one step, referred to as step, in which an amine or a thiol comprising a free anion or a latent anion is used as a scavenger of residual activated carboxylic functions.

本发明涉及快速溶液合成肽的方法，该方法包括步骤-的重复循环：偶联步骤，使用过量的活化羧基成分酰化氨基成分，淬灭步骤，在该步骤中使用清除剂除去残余的活化羧基官能团，其中该清除剂还可以用于使生长中的肽去保护，一或多个水抽提和任选地，独立的去保护步骤，之后进行一或多次水抽提，其特征在于该方法包括至少一个步骤，称作步骤，在该步骤中包含自由阴离子或潜阴离子的胺或硫醇用作残余活化羧基官能团的清除剂。

The molten salt leaching method to extract potassium from potash feldspar is studied in this paper.

研究采用熔盐浸取法从钾长石中提取钾的工艺，分别选用不同阴离子的钙盐，比较出选择不同助熔剂时其阴离子对钾长石中钾溶出率的影响，确定了最佳助熔剂为CaC l2。

Combination of pyrrole binding site and amide NH generated a new kind anions binding site, pyrrolic amide.

在尘命体内，蛋白质对阴离子的识别主要是通过肽链中酰胺NH与阴离子间的氢键来实现的。

Unlike other types of anions, anionic electrons do not behave as if they were simple charged spheres.

和其它类型的阴离子不同，作为阴离子的电子不像那些简单的带电球体。

For this reason, theC〓/ donor PET system in aqueous medium will serve as the high efficient modelsystem to simulate the natural photosynthetic system.3 Photolysis and photooxidation of N-phenyl naphthylamines and photoinducedisomerization of alkyl isonitrile Reaction intermediates produced during the photolysis and photooxidation of N-phenyl naphthylamines were determined by spin trapping-ESR technique.

由于包容物导致的空间距离作用和水分子对离子对电荷分离所具有的溶剂化稳定作用，水相体系中C〓阴离子寿命相对于有机均相体系C〓阴离子的寿命成数量级地显著增长。

This Ph.D. thesis describes further studies on theformation of fluorinated phosphorus ylide-anions resultingfrom organometallics and their reactions, stereochemistry andapplications in organic synthesis. We found that inverse stereochemical results wereobserved in the reaction of the fluorinated ylide-anions withvarious proton donors.

本博士论文进一步研究了用有机金属试剂对含氟膦叶立德的亲核加成导致的叶立德阴离子的反应性、立体选择性及其在有机合成中的应用：首次发现含氟叶立德阴离子在与不同的质子化试剂作用时，反应呈现完全相反的立体化学结果。

The structures of the intercalates formed by reaction of four guests with Zn, Al-HTlc were characterized by XRD and IR techniques. And the charge density on the oxygens of each of the carboxylate groups for each of the four anions was investigated utilizing ab initio (HF/6-31G) method by G98w. The orientation of 1,2-,1,3-,1,4-benzenedicarboxylate or benzenecarboxylate anions between the layers was also proposed.

利用XRD和IR测试技术对样品结构进行表征，UV及HPLC对有机酸的反应量进行定量，并采用Gaussian-98软件包中ab initio分子轨道法(HF/6-31G)计算了各有机酸阴离子的分子结构，分析了其结构与插层行为的关系，并理论结合实验给出了各有机酸阴离子在锌铝类水滑石层间可能的空间构型。

The addition order of arsenate and chromate influences their uptakes to a certain extent, especially on the surface of hydroxy-Fe-montmorillonite complex.

竞争吸附实验的砷酸根、铬酸根吸附量均高于对其单阴离子的吸附量，此现象在复合体表面最为明显，说明复合体具有独特的阴离子吸附性能。

When pH value increases, the concentration of dianion, which has the largest value of σ_p and φ in all tautomers, gradually increases in the solution.

随着pH值的增大，溶液中双价阴离子的浓度逐渐增大。而双价阴离子的σ_P和φ值为最大。

Because of good selectivity to anions in solution of calix[4]pyrroles, the synthesis of calix[4]pyrrole-bonded stationary phase will also provide new means for separation to anions and neutral substances in chromatography and promote the development in supramolecular chemistry.

基于杯[4]吡咯化合物在溶液中对阴离子的选择性识别性能，利用其对色谱固定相进行改性以合成针对阴离子和中性小分子化合物的色谱柱将为色谱分离技术提供新的手段，推动超分子化学在分析化学中的应用并促进杯吡咯化学的发展。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐