温和条件下碳氢单键直接官能团化的新方法

介绍了近年来国内外在温和条件下碳氢单键直接官能团化反应的最新进展。官能团化反应的特点是，在常温常压和紫外光促进下，用过渡金属配合物催化碳氢单链活化，使烷烃、芳烃等烃类的碳氢单键直接官能团化，从而达到直接利用各种烷烃及芳烃作为化工原料合成有机化工产品的目的。通过紫外光催化可以使反应在常温常压下进行，能克服传统工艺能耗高、选择性差的缺陷。经不断深入研究，该反应可望在２１世纪成为环境友好的有机合成工艺。     

AHMED experiments on hygroscopic and inert aerosol behaviour in LWR containment conditions: experimental results

Hygroscopic NaOH, CsI, CsOH and inert Ag aerosol behaviour at different temperatures and relative humidities (RH) has been studied in a well instrumented and controlled vessel of 1.81 m³ total free volume. Homogeneous thermal-hydraulic conditions for aerosol measurement in the vessel were achieved. The aerosol number and mass concentration were measured continuously during the experiments using a Condensation Nucleus Counter and a Tapered Element Oscillating Microbalance. The particle size distribution and chemical composition in the test conditions were measured by Berner low pressure impactors. In the case of NaOH the half life of the aerosol mass concentration was more than four times longer at low RH (22%) as compared to high RH (96%). The half lives of the CsOH and CsI aerosols were only twice as long at low RH as compared to high RH. Thus at high RH (96–97%) the half lives of CsOH and CsI were twice as long as the half life for the NaOH aerosol. The faster decay of the NaOH aerosol is due to the smaller density decrease of NaOH during water condensation. CsOH particles grew rapidly to their equilibrium size at all humidities. The measured equilibrium size for CsOH aerosol agree well with the calculated particle size at different RHs. Experimental results were also compared with calculations obtained by severe accident computer codes. These calculated results will be presented in a later paper.     

蒸汽压法测定导热油热分解温度的研究

根据克拉贝龙—克劳修斯方程，建立了国内外文献未见报道的测定导热油热分解温度的试验装置和试验方法，测定了大量国内外导热油的热分解温度，数据表明该法具有准确、简单、实用、省时、省力等优点     

PXJ—Ⅱ排险机器人

介绍了一种可在危险环境下作业的遥控机器人－－ＰＸＪ－Ⅱ排险机器人，分析了其功能指标及结构，简述了以武器系统和传感器为主的机器人辅助系统及其实用意义。     

The greenhouse effect; Impact upon and the role to be played by construction

The authors highlight several possible ways in which the construction industry could lower present emissions of the greenhouse gas, carbon dioxide. It is an excellent discussion document and is recommended reading.     

热分层流动计算中若干差分格式的比较

本文应用常规的守恒方程及湍流模型，对二维池内热分层流动建立了数学模型，并在Ｐａｔａｎｋａｒ的压力校正法基础上对该数学模型进行了数值计算，计算中的差分格式为乘方格式、一阶迎风、二阶迎风和ＱＵＩＣＫ。通过与实验的比较分析，建议计算应采用ＱＵＩＣＫ格式，并在进行风格独立性试验的基础上使用加密网络。     

面向对象中文窗口开发环境：C—VISION

Ｃ－ＶＩＳＩＯＮ中文窗口系统综合采用了面向对象与窗口环境设计的程序方法，彻底更新了在微机上进行中文窗口设计的编程思想，同时作为一个基础系统，为软件设计节约了大量的人力和时间，实现了微机程序的共享。     

彩色PDP用玻璃基板

本文讨论了彩色ＰＤＰ现用钠钙玻璃的热稳定性，指出由于这种玻璃在热处理过程中易变形和收缩，因而不适合作大面积彩色ＰＤＰ基板材料，介绍了彩色ＰＤＰ基板玻璃的制造方法和特点。最后介绍了日本旭硝子公司和美国康宁公司各自为彩色ＰＤＰ新开发的玻璃基板材料ＰＤ２００和ＣＳ２５。     

Thermal Stability of Some Metabolically Conjugated Potential Precursors of Flavor Components in Meat and Milk

The stability of selected metabolic conjugates (phenylphosphate, phenylglucuronide, naphthylglucuronide, and naphthylsulfate) was evaluated in model systems. Phenylphosphate was less stable than the glucuronides and the sulfate, especially under neutral (pH 6.8) and acidic conditions (pH 1.5). Phenylphosphate was completely degraded after 1.7 hr at 100°C, and after 0.3 hr at 150°C at pH 6.8. The glucuronide and sulfate conjugates were especially stable under neutral conditions (pH 6.8) requiring > 5 hr for complete hydrolysis at 100°C. All conjugates were quite stable to hydrolysis under alkaline conditions (pH 11). The presence of certain organic solvents (ethyl acetate or ethyl ether) caused rapid hydrolysis of conjugates under very mild conditions (40°C for 30 min). This information may improve under-standing of flavor production from animal products.     

4，4＇－二苯醚二甲酸改性PET的热性能研究

采用示差扫描量热和热重分析的方法对合成的不同４，４＇－二苯醚二甲酸（ＯＢＢＡ）含量的共聚酯的热性能进行了研究。结果发现共聚酯的熔点和热结晶温度与ＰＥＴ相比有所降低；而冷结晶温度则升高。随着ＯＢＢＡ添加量的增加，在恒温热重分析中热失重速率常数减小；在升温热重分析中，热失重活化能则增加。所有的实验结果皆表明，芳族醚键的引入对提高共聚酯的热性能有重要作用。