玻色─爱因斯坦关联半径和源半径对实验窗口的依赖及它们的差异

研究了160A GeVPb+Pb反应中π源的玻色─爱因斯坦关联半径和源半径(均方根半径)的关系,以及它们对实验窗口的依赖. 模型冗源由URASiMA生成器产生. 研究表明关联半径和源半径不仅数值不等,而且变化行为也不同.     

THE TRANSFORMATION FUNCTION Φ AND THE CONDITION NEEDED FOR KUR SPACE HAVING THE FIXED POINT

In the last several years some progress has been made in the study of the properties ofthe extent of Banach space:In 1979 for example.when Suillivan discussed a relatedcharacterization of real L~P(X)space.he used uniform behavior of all two-dimensionalsubspace and defined this concept of a KUR space.In 1980 Huff used the concept of a NUCspace when he discussed the property of generalizing uniform convexity which was definedin terms of sequence.And in 1980 Yu Xin-tai stated,certainly and proved that the KURspace is equal to the NUC space.However,the following quite interesting questions raised respectively by Suillivan andHuff merit attention:Does every super-reflexive space have the fixed point property?The purpose of this paper is to study the characterization of transformationfunction and relationships between transformation function and the two questions above.     

高等职业教育高在何处

通过论述高等职业教育的办学特色，从高、中职学历教育两方面阐述高等教育的标尺和高等职业技能的科技文化含量，为高等职业教育提供参考。     

一种电化学调制光谱用电解池

电化学调制光谱,又称电反射谱,是近年来发展起来的现场光学测量新技术。其实验方法是:研究电极受到小幅度交流信号的激励,其反射率发生相应的交变响应,采用锁相技术,测     

Preparation and Photocatalytic Properties of Ti1-xZrxO2 Solid Solution

A series of Ti1-xZrxO2 materials were synthesized through a multistep sol-gel process. The structural characteristics were investigated using X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS） and Raman measurements. The experimental results showed that a solid solution could be obtained at low Zr/（Ti＋Zr） molar ratios （x ≤0.319）. Raman measurements exhibited that the presence of zirconium in the solid solutions greatly retarded the amorphous-anatase and anatase-rutile transitions. The diffuse reflectance UV-Vis spectra revealed that the bandgap of the solid solution was enlarged gradually with the increment of incorporated zirconium content. The Ti1-xZrxO2 solid solutions exhibited higher photocatalytic activity than pure TiO2 for the degradation of 4-chlorophenol aqueous solution.     

无载体离子有机共沉淀分离-石墨炉原子吸收光谱法测定海水中铜铅铬镍

以吡咯烷二硫代氨基甲酸铵(APDC)氧化物作为共沉淀剂,建立了无载体离子有机共沉淀分离、石墨炉原子吸收光谱法测定海水中铜、铅、铬、镍的方法。考察了海水样品pH、共沉淀剂APDC和氧化剂H_2O_2的用量、陈化时间等因素对共沉淀分离效果的影响,优化了实验条件。结果证明,在p H4~5的海水样品中,加入4 m L 30 g/L APDC,1 m L H_2O_2,静置60 min,待测元素能与海水基体很好的分离。铜和铬含量在0~20μg/L范围内呈良好的线性关系,线性相关系数R0.999;镍含量在0~30μg/L,铅含量在0~40μg/L范围内呈良好的线性关系,线性相关系数R0.998;检出限分别为0.31,0.30,0.20,0.25μg/L,方法精密度好,加标回收率为88.8%~101.4%。方法可用于海水样品中铅、铜、镍、铬的常规检测。     

4-酰基-双(1,3-二苯基-5-吡唑啉酮)铽(Ⅲ)配合物的和成及荧光性质

合成了3种4－酰基－双（1，3－二苯基－5－吡唑啉酮），1，5－双（1′，3′－二苯基－5′－吡唑啉酮－4′－基）－1，5－戊二酮；1，6－双（1′，3′－二苯基－5′－吡唑啉酮－4′－基）－1，6－己二酮和1，10－双（1′，3′－二苯基－5′－吡唑啉酮－4′－基）－1，10－癸二酮，通过元素分析，红外光谱和核磁共振氢谱对产物组成进行了表征，合成了它们的Tb(Ⅲ）二元和三元[1,10-二氮杂菲（Phen)或2，2′－联吡啶（Dipy)]配合物，测定了配合物的荧光光谱，对其荧光性质进行了研究，结果表明，配合物发射Tb(Ⅲ）的特征荧光，4－酰基0双（1，3－二苯基－5－吡唑啉酮）配体的三重态能级与Tb(Ⅲ）的最低激发态（5D4）能级匹配较好，配合物荧光强度随4－酰基－双（1，3－二苯基－5－吡唑啉酮）配体2个吡唑环间碳链的增长而减弱，第2配体Phen和Dipy具有荧光增强作用，且前者优于后者。′     

甲基橙—溴化十六烷基三甲胺三元络合物分光光度法测定微量铜（Ⅱ）

本介绍了甲基橙与铜在ＰＨ３．８时与溴化十六烷基三甲胺形成三元胶束络合物增溶于聚乙烯醇体系中，其表观摩尔吸系数ε５８０为２．９５×１０＾６Ｌ．ｍｏｎ＾－１．ｃｍ＾－１，铜（Ⅱ）浓度在０．１－０．６μｇ／２５ｍＬ范围内与吸光度成线性关系。用此法分析人中铜含量，结果满意。     

一维链状4-羧基苯氧乙酸桥联钴配位聚合物[Co(p-CPOA)(2，2′-bipy)(H2O)]n的合成与晶体结构

A novel coordination polymer of [Co(p-CPOA)(2，2′-bipy)(H₂O)]_n (p-CPOA^2-=4-carboxylphenoxyacetate dianion, 2,2′-bipy=2,2′-bipyridine) was synthesized and characterized by elemental analysis, IR and X-ray single crystal diffraction. The title complex crystallizes in monoclinic space group C2/c, with a=1.424 4(3) nm, b=1.316 6(3) nm, c=1.947 7(4) nm, β=104.56(3)°. V=3.535 3(14) nm³, Z=8, R=0.028 5, wR=0.089 1. The cobalt(Ⅱ) ion displays a distorted octahedral coordination geometry, defined by three carboxyl oxygen atoms from different p-CPOA^2- groups, two nitrogen atoms from 2,2′-bipyridine ligand and one water molecule. The cobalt atoms are bridged by p-CPOA^2- groups, forming a one-dimensional chain structure along a axis. The adjacent Co…Co atoms distance is 0.996 8 nm. A layer supramolecular network is contrsucted by the hydrogen bonds and π-π stacking interactions. CCDC: 220039.     

薄层扫描法测定洋金花中3种茛菪生物碱的研究

在硅胶G薄层板上，以甲苯-丙酮-无水乙醇-氨水=体积比(15：10：7：2)为展开剂，用改良碘化铋钾与KI—I2混合液作为显色剂，采用双波长薄层扫描法实现了中药材洋金花中3种莨菪生物碱(山莨菪碱、阿托品、东莨菪碱)的同时分离和测定。平均加标回收率在105％～107％之间。