Science Letters： A synthetic Toll-like receptor 2 ligand decreases allergic immune responses in a mouse rhinitis model sensitized to mite allergen

It has been proposed that activation of Toll-like receptors （TLRs） plays crucial roles in the polarization of adaptive immune responses. A synthetic Toll-like receptor 2 （TLR2） ligand, Pam3CSK4, has been reported to modulate the balance of Th1/Th2 responses. We evaluated the modulation effect of Pam3CSK4 on allergic immune response in a mouse rhinitis model sensitized to house dust mite allergen （HDM）. Mice were sensitized and challenged with Dermatophagoidesfarinae allergen （Der f）, and then the allergic mice were treated by Pam3CSK4. Nasal allergic symptoms and eosinophils were scored. Der f-specific cytokine responses were examined in the splenocytes and bronchoalveolar lavage fluid （BALF）. Serum level of total IgE was also detected. After establishing a mouse allergic rhinitis model with HDM, we have showed that Pam3CSK4 treatment not only ameliorated the nasal allergic symptoms remarkably but also decreased the eosinophils and total inflammation cells in BALF significantly. Analysis of cytokine profile found that IFN-7 released from either BALF or stimulated splenocytes increased markedly in Pam3CSK4-treated mice, while IL-13 decreased significantly. Moreover, serum level of total IgE was significantly lower in Pam3CSK4-treated mice than in the untreated. Thus, in an allergic rhinitis mouse model developed with HDM, Pam3CSK4 was shown to exhibit an antiallergic effect, indicating its potential application in allergic diseases.     

LnMgB_5O_（10）：Mn~（2＋）（Ln＝La，Gd，Y，Ce）体系中Mn~（2＋）的双重谱与配位场参数

研究了ＬｎＭｇＢ５Ｏ（１０）：Ｍｎ（２＋）（Ｌｎ＝Ｌａ，Ｇｄ，Ｙ，Ｃｅ）体系中稀土离子对Ｍｎ（２＋）的双重谱的影响．从理论上计算了Ｍｎ（２＋）的离子能级和配位场参数，论述了双重谱的成因，理论分析与实验结果较为吻合．     

Progress in the research of radical anion ligands and their complexes

Recent progress in the research of radical anion ligands and their complexes with metals were summarized in this review. Radical anions were sorted into several types including iminosemiquinonate and iminoquinonate radical, nitroxide radical, heterocycle radical etc. Structural characteristics and properties of the corresponding complexes were introduced. The complexes exhibited novel properties and possibility for applications in organic magnetic materials and transition metal catalysis.     

配位场微扰能级计算程序设计

本文报道了用FORTRAN77语言设计配位场微扰能级的计算机程序.程序适用于多d电子组态的立方、四方配位场情况,程序灵活可用于多种配位数,计算实例与文献吻合.     

Ligand effects on the structure and vibrational properties of the thiolated Au18 cluster

Most of the studies devoted to thiolated gold clusters suppose that their core and Au-S framework do not suffer from distortion independently of the protecting ligands (-SR) and it is assumed as correct to simplify the ligand as SCH3. In this work is delivered a systematic study of the structure and vibrational properties (IR and Raman) of the Au18(SR)14 cluster. The pursued goal is to understand the dependency of the displayed vibrational properties of the thiolated Au18 cluster with the ligands type. A set of six ligands was considered during calculations of the vibrational properties based on density functional theory (DFT) and in its dispersion-corrected approach (DFT-D).     

在配位反应中计算配体浓度的新方法

本文提出了由副反应系数lgα_(M(L))计算PL的新方法,使一元高次方程的求解简化为加减运算.为确定配位反应中配体的适宜浓度,提供了一个简便、准确的方法.     

4,5-二对氯苄硫基-1,3-二硫杂环戊烯-2-硫酮配体的合成及其结构表征

由两种途径[dmit的钠盐与卤代物反应和（dmit）2Zn（NBu4）2直接与卤代物反应]合成4,5-二对氯苄硫基-1,3-二硫杂环戊烯-2-硫酮配体,对两种途径的优缺点做了比较和分析,用IR谱图简单的表征了其结构.     

Cu-PAR稳定常数的配体竞争-等色点光度法测定

本文研究了“配体竞争一等色点光度法”测定高稳定性配合物的稳定常数,利用该法研究铜(Ⅱ)与PRA的配位反应,测得该反应生成1:1型配合物1gK_(ML)=16.44,1:2型配合物1gK_(m12)=25.93。     

溶液中混合配体化合物生成的极谱研究 Ⅰ、铅(Ⅱ)和以丙二酸根为初级配体,以乙酰丙酮、氨基乙酸根和乙二胺为次级配体的混合配体化合物

本文用极谱法研究了以丙二酸根(mal)为初级配体并分别以乙酰丙酮(acac)、氨基乙酸(gly)和乙二胺en)为次级配体的pb(Ⅱ)的1:1:1型混合配体化合物的稳定性,实验结果表明pb(Ⅱ-mal--acac体系的稳定性略低于统计效应的期望值,而其他两个体系则都高于期望值。对于统计效应的正偏离,按以下顺序下降:pb(Ⅱ)-mal-acac>pb(Ⅱ)-mal-gly>pb(Ⅱ)-mal-en。讨论了造成上列顺序的原因和混配化合物稳定性对配体的依赖关系。     

多功能配体—AS_2

本文对近年来新出现的二砷配合物进行了系统的讨论.