绿色工艺的原料--碳酸二甲酯

比较系统地综述了碳酸二甲酯的性质及合成工艺情况,并对碳酸二甲酯的应用作了分析。介绍了碳酸二甲酯制备的技术及应用研究的最新情况,对碳酸二甲酯在我国的发展作了展望。     

Thermal Behavior, Non-isothermal Decomposition Reaction Kinetics of Copper（Ⅱ） Salt of 4-Hydroxy-3,5-dinitropyridine and Its Application in Propellant

IntroductionCopper( ) salt of4- hydroxy- 3,5 - dinitropy-ridine( 4 HDNPCu) is an energetic material contain-ing energetic_ NO2 groups,which can be used asan energetic auxiliary catalyzer substituting the in-ertia copper salt to improve the catalysis of themain catalyzer( lead salt) in propellant[1] .Thermalbehavior is one of the most important aspects af-fecting its catalytic efficiency for propellant.How-ever,its kinetic parameters of thermal decomposi-tion and its application in RDX- co…     

手性离子液体的合成及其应用

近年来对离子液体的研究已取得了显著进展,并已在许多领域得到了广泛应用。手性离子液体(CILs)作为离子液体家族新成员,引起越来越多的兴趣。本文综述了手性离子液体的合成以及应用,并对以后的研究方向作了展望。     

接枝壳聚糖在药学领域的应用

壳聚糖无毒、具有良好的生物相容性、可生物降解性、无免疫反应和无致癌性等优点,可安全可靠地用于药物中.可是壳聚糖仅溶解在少数稀酸中,从而限制了其广泛的应用.对壳聚糖进行接枝,可使其溶解性增加,或增加一些其它性能,扩大其应用范围.本文从接枝聚合方法和应用的角度,综述了近年来壳聚糖的接枝共聚产物在药学领域的研究进展,包括:聚丙烯酸类、丙烯酰胺类、乙烯基类、聚乙二醇类、聚丙交酯(聚乳酸)类、脂肪酸类、具特殊功能的分子和其它疏水性侧链等,并提出未来的发展方向.     

基于自组装技术的纳米功能材料研究进展

纳米自组装技术的迅速发展拓宽了纳米材料的应用领域.利用自组装合成纳米新材料是一种有效且具有发展前景的方法.本综述介绍了纳米自组装技术的研究价值及近年来新兴的制备方法,重点论述了驱动纳米自组装的作用类型,包括范德华力、静电作用、磁力作用、氢键、熵效应以及疏溶剂相互作用、DNA碱基互补配对等其它相互作用,同时也对纳米自组装体的应用情况进行了阐述,并探讨了利用纳米自组装技术研制新材料所面临的机遇和挑战.     

Composite-variable modeling for service parts logistics

The Publisher regrets that it appears there is only one author for this article. There are actually two authors. The co-author is named above. This was a typesetter error. The online version of the original article can be found at     

Modeling and analysis of a supply–assembly–store chain

We consider a supply–assembly–store chain with produce-to-stock strategy, which comprises a set of component suppliers, a mixed-model assembly line with a constantly moving conveyor linking a set of workstations in series, and a set of product storehouses. Each supplier provides components of a specified family, which are assembled at a corresponding workstation. Units belonging to different models of products are sequentially fed onto the conveyor, and pass through the workstations to generate finished products. Each storehouse stores finished products belonging to a specific model for satisfying customer demands. The suppliers deliver components according to a just-in-time supply policy with stochastic leadtimes. Customer demands for a particular model of products arrive at the corresponding storehouse according to a Poisson stream. The paper conducts a modeling and performance analysis in the design stage of the system in the sense of “long-term-behavior”. A rolling technique is constructed for analyzing stationary probability distributions of the numbers of components. A two-dimensional Markov chain with infinite states is introduced for analyzing stationary probability distributions of inventories of finished products. Based on these distributions, performance measures of the system, such as work-in-process of components, inventory amounts of finished products, as well as service levels for customers, can be easily obtained. Managerial insights are obtained from both analytical and numerical results.     

天生我铍必有用

As one of alkali metal elements, beryllium has attracted much attention because of its unique nature. With an anthropomorphic tone, the article briefly introduces the abnormal chemical properties of beryllium and its applications in alloys, medical treatments, gemstones and other fields in recent years.     

导数原子光谱分析新技术研究进展

本文评介了导数测量技术在原子光谱分析中的应用研究进展。介绍了常规原子光谱信号模型及其原子光谱信号的导数模型;讨论了原子发射光谱和原子吸收光谱分析导数测量新技术原理及其分析特性。介绍了导数原子光谱技术在生物样品、环境样品、药物分析、食品饮料、金属及合金样品痕量金属元素分析中的应用。基于信号强度随时间变化的新型导数原子光谱分析新技术较常规原子光谱分析,其灵敏度和基线稳定性显著提高、检出限明显改善,在痕量和超痕量金属元素分析领域有着广阔的应用前景。