Quantitative NMR in synthetic and combinatorial chemistry

The applications of quantitative NMR to synthetic organic chemistry are reviewed with taking into account both the small libraries (100–150 compounds) and the single, well-characterized substance. The precision and accuracy which are obtained with state of the art instrumentation – both around 1% – rival with other classical tools of quantitative analytics, and qNMR does not require a specific method setup or a standard of the same substance. This characteristic makes it the method of choice in an environment where many different molecules are investigated and reliable quantification is required. NMR may effectively replace other standard characterization tools, such as CHNS analysis, or even complex, multi-determination results as commonly required for the assessment of absolute purity or strength of a substance, when no specific standard is available. Finally, because of the high precision and intrinsic accuracy, quantitative NMR appears the ideal reference method for the validation of other, more rapid, generic techniques for quantitative analysis.     

构建和谐图书馆

简要阐述了和谐图书馆的内涵和基本特征,分析了图书馆在发展过程中遇到一些“不和谐”的现象,并提出构建和谐图书馆的具体措施。     

Identification of peptides from human pathogens able to cross-activate an HIV-1-gag-specific CD4+ T cell clone

Antigen recognition by T cells is degenerate both at the MHC and the TCR level. In this study, we analyzed the cross-reactivity of a human HIV-1 gag p24-specific CD4(+) T cell clone obtained from an HIV-1-seronegative donor using a positional scanning synthetic combinatorial peptide library (PS-SCL)-based biometrical analysis. A number of decapeptides able to activate the HIV-1 gag-specific clone were identified and shown to correspond to sequences found in other human pathogens. Two of these peptides activated the T cell clone with the same stimulatory potency as the original HIV-1 gag p24 peptide. These findings show that an HIV-1-specific human T helper clone can react efficiently with peptides from other pathogens and suggest that cellular immune responses identified as being specific for one human pathogen (HIV-1) could arise from exposure to other pathogens.     

In vitro and direct in vivo testing of mixture-based combinatorial libraries for the identification of highly active and specific opiate ligands

The use of combinatorial libraries for the identification of novel opiate and related ligands in opioid receptor assays is reviewed. Case studies involving opioid assays used to demonstrate the viability of combinatorial libraries are described. The identification of new opioid peptides composed of L-amino acids, D-amino acids, or L-, D-, and unnatural amino acids is reviewed. New opioid compounds have also been identified from peptidomimetic libraries, such as peptoids and alkylated dipeptides, and those identified from acyclic (eg, polyamine, urea) and heterocyclic (eg, bicyclic guanidine) libraries are reviewed.     

网络环境下医院图书馆的信息服务工作

通过分析网络环境下医院图书馆信息服务的特点，提出医院图书馆应增强信息服务意识，为用户提供全方位医学文献信息服务。     

SEREX方法鉴定胃癌肿瘤相关抗原基因

目的采用重组CDNA表达文库血清学分析法(SEREX法)寻找胃癌相关肿瘤抗原的编码基因。方法抽提胃癌细胞株SGC7901和1例胃癌组织标本PolyA+RNA,分别构建2个胃癌cDNA表达文库,用含有抗体的胃癌患者血清对2个文库进行筛选,并对筛选所得到的阳性克隆进行测序和生物信息学分析。结果经测定2个原始文库滴度分别为1.6×106pfu和2.5×106pfu,重组率为95%和98%。2个文库经3轮筛选共获得14个胃癌肿瘤相关抗原编码基因,其中一个为未知基因。13个已知基因编码产物包括代谢酶、RNA转录和翻译调控蛋白、蛋白代谢相关分子、自身免疫疾病相关抗原及未知功能蛋白分子。结论　胃癌相关肿瘤抗原编码基因的筛选和鉴定,为胃癌的临床诊断和特异性免疫治疗提供了靶点,有助于对胃癌发生机制的深入理解。     

学习型图书馆的理论与实践

以彼得.圣吉博士的学习型组织作为学习型图书馆的理论基础,探讨了学习型社会对图书馆和图书馆员的要求和建立学习型图书馆的必要性,阐述了学习型图书馆的特征,以及如何建立学习型图书馆。     

64/110kV全冷缩交联电缆附件的研制

研究了不同用户信息需求的特点和国内外医学情报专题服务的类型，及开展专题情报服务应注意的问题。     

中医院校图书馆参考咨询员知识结构分析

从医、教、研人员对中医古籍图书的需求、对中医古代专题资料的需求、对现代中医药期刊文献的需求、对特种中医药文献的需求、对中医药数据信息的需求、对中医药课题研究的定性需求等实例出发，对中医院校图书馆参考咨询员的知识结构进行了分析。     

肺癌候选抗原的血清反应分析及其联合检测的应用

目的：通过重组cDNA表达文库血清学分析（SER-EX）技术筛选鉴定的5种肺癌候选抗原的血清学反应及其联合检测分析,对其能否作为肺癌早期诊断的血清学标志物进行评价,并提供一个肺癌早期诊断的新方向.方法：采用重组克隆抗原表达技术扩增5种肺癌候选抗原[分别是X5：二羟基苯甲酸内脂结合蛋白1配偶体（POB1）;X18：DNA拓扑异构酶Ⅱα（Top2A）;X44：中枢神经系肽酶Ⅰ（TPP1）;X48：热休克蛋白90а（HSP90а）;X52：真核翻译延长因子1γ（eukaryotic translation elongation factor 1 gamma）],免疫印迹法检测肺癌患者血清、正常人血清中自身抗体的反应,流行病学方法对其检测结果进行评价.结果：POB1,Top2A,HSP90а3个肺癌候选抗原克隆在肺癌患者血清和正常人血清中的相应IgG抗体阳性率差别有统计学意义（P〈0.05）;3个阳性反应抗原抗体反应联合分析时,能够在保持特异度等基本不变的前提下,明显提高诊断肺癌的灵敏度,具有较大的临床诊断价值.结论：3个抗原可作为肺癌的早期诊断的候选标志物,为肺癌的早期诊断提供了一个新的方向.