刹车鼓工作面龟裂失效分析

用化学成分分析、金相组织检验、硬度测试以及对刹车鼓的宏观和微观分析等方法,对刹车鼓刹车失灵进行分析,并探讨了刹车鼓失效的原因、失效形式以及对刹车鼓铸件质量控制。     

2007年上半年三大合成材料价格走势回顾与分析及下半年预测

回顾并分析了2007年上半年三大合成材料价格变化情况及其原因,预测了2007年下半年三大合成材料的价格走势.     

泥煤对镍离子的吸附特性

通过试验不同量泥煤在不同pH溶液中溶液pH的前后变化,不同pH下泥煤吸附镍阳离子后溶液pH变化以及不同pH下溶液紫外吸收变化对比,结果表明泥煤具有一定缓冲性,不能仅以溶液酸度变化来证明泥煤吸附镍离子的机理,泥煤可能以2种方式吸附镍:pH大于4,吸附镍以离子交换为主,pH小于4,以物理吸附为主。     

化妆品中果酸的限量及检测

本文叙述了化妆品中果酸的种类及对皮肤的作用机理，讨论了果酸促进皮肤细胞更新能力和刺激性之间的关系以及化妆品中果酸的浓度限量问题，并介绍了一种应用高效液相色谱法检测化妆品中五种果酸含量的新方法。     

Cationic ring-opening polymerization of 2-phenyl-1,3,6,2-trioxaphosphocane

Summary The ring-opening polymerization of 2-phenyl-1,3,-6,2-trioxaphosphocane (4), an eight-membered cyclic phosphonite, has been investigated. Cationic initiators of PhCH₂-Cl and MeOTf gave polymers, whereas anionic and radical initiators did not yield polymer. The structure of polymer was examined by IR, ¹H, ³¹P, and ³¹C NMR spectroscopy of polymers and elemental analysis as well as the alkaline hydrolysis products. The polymer consisted of two different units, i.e., the major part is the normal phosphinate structure 5 and the minor part is the isomerized unit 6 in 7% with PhCH₂Cl initiation and in 34% with MeOTf initiator. The difference in nature of propagating species from these two initiators are discussed in connection with their reactivities.On leave from the Institute of Chemistry, Academia Sinica, Beijing, China     

工业过程的先进控制

在分析工业过程特点的基础上，总结了工业过程先进控制的发展现状，阐述了PID控制器参数整定和模型预测控制的基本概念和内容，讨论了工业过程先进控制的核心内容及其带来的可观的经济效益，并探讨了先进控制软件的产业化问题。     

FCC汽油降烯烃技术进展

介绍了近年来国内外FCC汽油降烯烃的技术进展，并对FCC汽油降烯技术及相关措施的未来应用前景进行了分析。     

TiC－Al_2O_3复合材料的自蔓延高温合成和致密化

以ＴｉＯ＿２，Ａｌ和Ｃ三种粉末为原料，采用自蔓延高温合成和加压的方法制备了ＴｉＣ－Ａｌ＿２Ｏ＿３复合材料。在１ＧＰａ压力下，可使样品达到理论密度的９５％。对未反应样品燃烧前在真空状态下预热脱气，则密度可达９８％。为避免样品开裂，必须控制冷却速度。对合成产品进行了Ｘ射线分析，表明从ＴｉＯ＿２，Ａｌ，和Ｃ三种粉末原料制备密实的ＴｉＣ－Ａｌ＿２Ｏ＿３复合材料是可能的。     

过氧化脲牙齿美白剂开发及应用研究进展

过氧化脲可通过持续释放活性氧达到牙齿美白的目的，适用于各种原因引起的着色牙齿的美白。它可同时美白多个牙齿，美白效率高、费用低、使用方便和刺激性小，详细介绍了国内外专利配方及其使用效果；总结了国内外对过氧化脲牙齿美白剂的应用研究和对牙釉质、牙本质的影响；指出了国外研究的发展趋势，结合我国的实际情况对我国开发过氧化脲牙齿美白剂的方向提出了建议。     

Laboratory study of air-water-coal combustion product (fly ash and FGD solid) mercury exchange

Recent laboratory research has indicated that coal fly ash derived from subbituminous and bituminous type coals is a sink for atmospheric mercury (Hg), however lignite-based ash was found to emit Hg to the air. Solids collected from systems with components that enhance Hg removal (i.e. activated carbon injection (ACI), flue gas desulfurization (FGD), and selective catalytic reduction (SCR) or selective non-catalytic reduction (SNCR)) may have higher Hg concentrations and therefore a higher potential for Hg release. For this study we investigated the potential for Hg release to the air and water from coal combustion products (CCPs) collected from coal-fired units with FGD equipment, SCR and SNCR equipment, and sorbent injection for Hg removal. In the laboratory study, most dry samples acted as sinks for atmospheric Hg in the dark at 25 °C. When exposed to light or increased temperature (45 °C), deposition of Hg to the fly ash substrates in most cases continued but decreased. Wet FGD samples emitted Hg. However, they became a sink for atmospheric Hg or exhibited low Hg emission rates when dried. Mercury flux in the dark at 25 °C was correlated with fly ash carbon content (LOI). Most liquid extracts derived using the synthetic precipitation leaching procedure (SPLP EPA method 1312) had very low Hg concentrations (<13 ng/l).