新光敏剂铝酞菁光化反应机制研究

使用ESR波谱技术研究铝酞菁光化反应,以2,2,6.6-四甲基-4-羟基哌啶醇为探针,探测光化反应的中间产物及反应机制,结果表明,反应体系中氮氧自由基的生成依赖于氧的存在,D_2O的增进效应及β-胡萝卜素的抑制效应表明铝酞菁光化反应产生了单线态氧(~1O_2),SOD及细胞色素C的部分抑制效应表明光化反应中有少量超氧阴离子自由基(O_2)生成。     

AMT在铜表面形成保护膜的STM研究

5一氨基七一流基一1、3、各喀二隆（AMT不仅是一种有效的感光材料和分析试剂，同时作为重要的中间体被广泛应用于农药、医药生产中间，但作为铜腐蚀抑制剂的应用还远不如苯并三氯哩．实验表明［'－'l，AMT在酸性、中性及碱性介质中对铜及其合金均具有较好的缓蚀作用，经AMT处理     

3%NaCl溶液中铜缓蚀剂TTA的光电化学和表面电子能谱研究

本文采用测开路光电压（Ｖｏｐｈ）的方法，检测铜在３％ＮａＣｌ溶液中的腐蚀行为及加入缓蚀剂ＴＴＡ的缓蚀效果的浓度效应，并辅之以表面电子能谱进行研究。结果表明当ＴＴＡ浓度小于１．５×１０＾－５ｗｔ％时，反而加速Ｃｌ＾－侵蚀；当ＴＴＡ浓度大于１．５×１０＾－５ｗｔ％时，ＴＴＡ才起到缓蚀作用。随ＴＴＡ浓度继续增加，ＴＴＡ保护膜变得更致密和更厚；当ＴＴＡ浓度大于５×１０＾－５ｗｔ％时，膜厚不再增加。     

缓蚀剂在阳极电泳涂装中的应用

在电泳涂装工艺中使用缓蚀剂，可提高阳极电泳涂层的防腐蚀性，实验表明，沥青电泳漆与缓蚀剂的电泳共沉积涂层对基底金属具有较高的防护性能，探讨了共沉积涂层中缓蚀剂的缓蚀机理。     

乙烯系单体自由基聚合的阻聚效应——Ⅷ.1,3,5-三苯甲(月替)对甲基丙烯酸甲酯的自由基阻聚及历程

用膨胀计法研究了1,3,5-三苯甲(月替)(TFH)及其与苯醌(BQ)、四氯苯醌(CA)和1,4-萘醌(NQ)的混合物对偶氮二异丁腈引发的甲基丙烯酸甲酯的阻聚效应。结果表明,TFH与BQ或NQ按一定比例混合阻聚效果显著。但TFH与CA混合则阻聚效果反倒比TFH单独用作阻聚时差。文中研究TFH的变色反应以及聚合系统中(TF·)的存在。初步讨论了TFH及TFH-Q混合对MMA的阻聚反应机理。     

Synthesis and structure revision of tyroscherin, and bioactivities of its stereoisomers against IGF-1-dependent tumor cells

Synthesis of the proposed structure of tyroscherin, a growth inhibitor of IGF-1-dependent cancer cells, was succeeded by one-pot Julia coupling. However, spectral data of the synthetic compound were not identical with those of natural tyroscherin. The stereochemistry of tyroscherin is revised to be 2S,3R,8R,10R by syntheses of stereoisomers. Synthetic tyroscherin showed more potent activity than its stereoisomers against IGF-1-dependent cancer cells.     

测定心血管紧张素转化酶抑制剂体外抑制动力学的反相HPLC法

报道一种用反相ＨＰＬＣ技术简便、有效地研究心血管紧张素转化酶抑制剂体外抑制动力学的新方法。该法利用马尿酰－甘氨酰－甘氨酸作酶底物，反相ＨＰＬＣ跟踪监测酶解产物马尿酸的浓度随时间变化来研究酶解反应的历程     

Discovering New Classes of <Emphasis Type="Italic">Brugia malayi</Emphasis> Asparaginyl-tRNA Synthetase Inhibitors and Relating Specificity to Conformational Change

SLIDE software, which models the flexibility of protein and ligand side chains while docking, was used to screen several large databases to identify inhibitors of Brugia malayi asparaginyl-tRNA synthetase (AsnRS), a target for anti-parasitic drug design. Seven classes of compounds identified by SLIDE were confirmed as micromolar inhibitors of the enzyme. Analogs of one of these classes of inhibitors, the long side-chain variolins, cannot bind to the adenosyl pocket of the closed conformation of AsnRS due to steric clashes, though the short side-chain variolins identified by SLIDE␣apparently bind isosterically with adenosine. We hypothesized that an open conformation of the motif 2 loop also permits the long side-chain variolins to bind in the adenosine pocket and that their selectivity for Brugia relative to human AsnRS can be explained by differences in the sequence and conformation of this loop. Loop flexibility sampling using Rigidity Optimized Conformational Kinetics (ROCK) confirms this possibility, while scoring of the relative affinities of the different ligands by SLIDE correlates well with the compounds’ ranks in inhibition assays. Combining ROCK and SLIDE provides a promising approach for exploiting conformational flexibility in structure-based screening and design of species selective inhibitors.     

Hydrolytically stable arabinofuranoside analogs for the synthesis of arabinosyltransferase inhibitors

The first members of two new families of arabinosyltransferase inhibitors, derived from previously reported hybrid compounds covalently associating an iminoalditol with an α-d-arabinofuranoside, have been prepared. In place of the arabinofuranoside moiety, they incorporate in their structure a suitably substituted tetrahydrofuran (C-glycoside family) or a cyclopentane (carba-sugar family) for mimicking the α-d-arabinofuranoside ring.