固沙植物白沙蒿化学成份的研究[Ⅰ]

从固沙植物白沙蒿中分到五个成份,经鉴定:1.亚(麻)油酸乙酯Ethyl linoleate。2.樱草素Sakuranetin,3.异樱草素Isosakuranetin,4.木波罗双氢黄酮Arto-carpanone,5、金合欢素Acacetin。亚(麻)油酸乙酯是冠心病类药物的主要成份,所以白沙蒿的发现为此类药物提供了新药源。     

THE TRANSFER BEHAVIOUR OF SOME CATIONS AT WATER／NITROBENZENE INTERFACE BY SEMIDIFFERENTIAL CYCLIC VOLTAMMETRY

The transfer of Sr~(2+) and Ba~(2+) ion, facilitated by 18-Crown-6 present in the aqueous phase, and of succinylcholine ion at w/nb interface were investigated by semi-differential cyclic voltammetry. A good polarographic curve of succinylcholine ion dissolved in water was obtained in the system of 0.01 mol/l LiCl (w)——0.01 mol/l TBATPB (nb). The peak current is directly proportional to the concentration of SC~(2+) ion. It can be used for the determination of SC and the detection limit is 1.05×10~(-5) mol/l.The apparent D~w and D~(nb) have been estimated. The transfer of Sr~(2+) and of Ba~(2+) at the interface are facilitated by 18-Crown-6 present in the aqueous phase and the peak current is directly proportional to the concentration of 18-Crown-6 in water. This method can be used for the determination of the complexing agent and for the stability constant of the complex formed in the aqueous phase.All the experimental results are in keeping with the theoretical.     

偏最小二乘紫外分光光度法同时测定萘，1－甲基萘和蒽

用偏最小二乘法（ＰＬＳ）进行校正和预测，不经分离同时测定了混合体系中的萘，１－甲基萘和蒽。萘，１－甲基萘和蒽的浓度分别在０～２８ｍｇ／Ｌ，０～４０ｍｇ／Ｌ和０～４０ｍｇ／Ｌ的浓度范围服从比耳定律。对合成样品中这三种组分进行分析，结果令人满意。     

THE INFLUENCE OF SPINNING CONDITION ON STRUCTURE & PROPERTIES OF MASS-DYED SUPERFINE PP AS-SPUN FILAMENTS

The effect of colorant additive on the rheology of PP polymer melt and the influence of spinning conditions on the crystalline and orientation structure of mass-dyed as-spun PP filament are reported. The △E~~~ value for all colored chips is higher than that of blank chip to a varying degree. The crystallinity and orientation degree of dyed PP as-spun filament decrease with increasing melt temperature, decreasing spinning speed and increasing denier per filament (dpf), while the crystallinity of dyed as-spun filament increases with the content of colorant additive as a nucleation agent.     

结构稳定性在非线性系统鲁棒性分析中的应用

探讨了非线性系统的结构稳定性、分叉点和鲁棒性之间的关系，提出了一种分析非线性系统鲁棒稳定性的方法，并给出了相应的计算实例．     

整体优化 提高高校学报质量

本文从学报形成的全过程入手,分析了影响学报质量的诸因素,提出了人与科学技术相结合;编者与作者相结合;编者与读者需要相结合;办刊与高校教育相结合来提高学报质量的观点,使学报在信息传播的全过程中实现整体优化。     

碳酸钕对AZ91合金组织的细化和腐蚀性能的影响

通过介绍实验条件实验方法及结果,并对其进行讨论,研究碳酸钕对A291合金组织的细化和腐蚀性能的影响。     

数学中的探索研究和发现

本书是一本关于数学“解题术”的论著，其目的是引导中学生和大学低年级学生通过解数学题提高思维能力和解题技巧，着重培养他们数学学习中的探索精神，以研究解题规律和发现新的问题和结果。     

Ontology-Based Semantic Annotation for Problem Set Archives in the Web

0 IntroductionAsneim mapnotircta nWte pbre i-sco tnhdieti oabnilfiotry r etaoli zainnngotthatee go aWle obf trhe-esources with semanticinformation[1]. However ,annotationtools so far basically allowthe user to annotate with plaintext using the method of information extraction.In manycases ,one can hardly extract semantics from Web docu-ments ,such as problemset archivesinthe Web.Massive problemset archives are availableinthe Web,for example,http://acm.uva.es, while each problemsetarchives pr…     

以科学发展观为指导努力开创科技工作新局面

阳曲县作为山西省太原的近郊县，近年来认真贯彻十六大精神和“三个代表”重要思想，紧紧围绕全面建设小康社会的目标，以加快发展为第一要务，立足阳曲县，全面落实科教兴县战略，以项目带动产业发展，以科技加快区域创新，先后实施国家、省、市、县科技计划项目157项，引进推广工农业新技