Construction of Carbon Nitride Based Intramolecular D–A System for Effective Photocatalytic Reduction of CO2

Catalysis Letters - Photocatalytic technology provides a new strategy for mitigating energy crisis. The development of photocatalytic materials with high efficiency and stable visible light...     

Synthesis and Evaluation of Glycoconjugates Comprising N‐Acyl‐Modified Thomsen–Friedenreich Antigens as Anticancer Vaccines

Thomsen–Friedenreich (TF) antigen is an important tumor‐associated carbohydrate antigen. Its low immunogenicity, however, limits its application in the development of anticancer vaccines. To solve this problem, several N‐acyl‐modified TF derivatives were synthesized and conjugated with carrier protein CRM197 (a mutated diphtheria toxoid cross‐reactive material). The immunological results in BALB/c mice demonstrated that these modified TF antigen conjugates could stimulate the production of higher titers of IgG antibodies that cross‐reacted with native TF antigen. These glycoconjugates showed strong lymphocyte proliferative response, suggesting that they can induce cellular immunity. Furthermore, the elicited antisera reacted strongly with TF‐positive tumor cells (4T1). In particular, the N‐monofluoroacetyl‐modified TF conjugate 4 ‐CRM197 showed the strongest complement‐dependent cytotoxicity effect against 4T1 cells, implying the potential of this glycoconjugate as an anticancer vaccine.     

磷铵—氯化铵—氯化钾系复混肥造粒过程正交实验研究

采用正交实验方法对磷铵—氯化铵—氯化钾系复混肥盘式造粒特性进行了研究 ,通过方差分析及显著性校验 ,确定了过程的适宜工艺条件。     

厚浆型环氧油舱漆的研制

厚浆环氧油舱漆以其涂层厚,干燥快,耐油防腐等优良特性,成为舰船油舱的新产品,本文介绍了该漆的研制过程,生产工艺及施工方法。     

水溶液中4-(2-羟基-苯甲酸酯基)-2-环戊烯砜的合成

以3,4-二溴环戊砜(1)为原料,在无水吡啶作用下发生消除反应,得到反应中间体4-溴-2-环戊烯砜(2),再与水杨酸钠(3)在水溶液和DMF中发生酯化反应,合成水杨酸酯环戊烯砜衍生物(4),用IR,1H NMR,MS,元素分析表征了它们的结构,并讨论了酯化反应在在水溶液和DMF中的最佳反应条件。结果表明:水溶液中的酯化反应后处理更加简单,产率最高。     

BS7910疲劳评定方法及特点

BS7910“金属结构缺陷验收评定方法导则”是英国标准委员会在PD6493及其发展版本上建立的。主要介绍BS7910标准中提供的平面缺陷断裂力学的评定方法和质量等级的评定方法,并与IIW评定方法作了相应的对比。     

Eliminating Molybdenum from Sodium Tungstate Solution by Selective Precipitation

Eliminating Molybdenum from Sodium Tungstate Solution by Selective Precipitation     

智能分光光度计数据处理系统

本文报道了分光光度计高性能实时数据处理计算机系统的研制,包括系统构成、接口逻辑设计和数据处理软件。其主要特点是将廉价的便携式计算机与低档分光光度计组合实现了某些进口中高档分光光度计自动数据处理的功能。使用该系统,不仅可实现透射与吸收的实时数据采集,而且能完成从紫外到可见光区的定量分析和定性分析等数据处理工作,包括谱图的测定、运算和绘制,以及标准曲线法,直线外推法等等定量。     

Mechanical Behavior and Microstructure Evolution of Bearing Steel 52100 During Warm Compression

High-performance bearing steel requires a fine and homogeneous structure of carbide particles. Direct deformation spheroidizing of bearing steel in a dual-phase zone can contribute to achieving this important structure. In this work, warm compression testing of 52100 bearing steel was performed at temperatures in the range of 650–850°C and at strain rates of 0.1–10.0 s^?1. The effect of deformation temperatures on mechanical behavior and microstructure evolution was investigated to determine the warm deformation temperature window. The effect of deformation rates on microstructure evolution and metal flow softening behavior of the warm compression was analyzed and discussed. Experimental results showed that the temperature range from 750°C to 800°C should be regarded as the critical range separating warm and hot deformation. Warm deformation at temperatures in the range of 650–750°C promoted carbide spheroidization, and this was determined to be the warm deformation temperature window. Metal flow softening during the warm deformation was caused by carbide spheroidization.