用氯离子选择电极同时分析水中Cl^—,Br^—,I^—的含量

本文研究了氯离子选择电极同时测定水中Ｃｌ＾－，Ｂｒ＾－，Ｉ＾－的方法。利用氯电极对Ｂｒ＾－，Ｉ＾－的响应，用混合加入法测定，非线性最小二乘法计算求解。测定了实际体系中Ｂｒ＾－，Ｉ＾－，在氯电极上的选择系娄，然后用多次标准加入法测定，迭代法同时计算各组份的分析结果，众而实现了用氯电极同时分析水中Ｃｌ＾－，Ｂｒ＾－，Ｉ＾－的含量。     

血清外泌体的蛋白质组分析及其在骨质疏松中的应用

外泌体是细胞分泌的微小具膜囊泡，作为重要媒介参与细胞间的信号传递，已在疾病的诊断和治疗中发挥独特作用。骨质疏松症是全身性骨代谢疾病，容易引起骨密度减少并导致骨折，在老年人群中发病率很高，目前急需发展特异性体液诊断技术。本论文采用超速离心的方法，对血清中的外泌体进行了分离富集和表征，并采用液相色谱-质谱进行了外泌体蛋白质组学分析，共鉴定到了179个外泌体蛋白质，主要参与防御响应和免疫应答等生物过程。针对来自正常对照组、骨量减少组和骨质疏松组的血清样本，分离富集其中的外泌体，通过免标记定量蛋白质组学分析，分别鉴定到188、224和185个蛋白质。定量分析显示17个蛋白质的表达量在骨质疏松组和骨量减少组有显著改变（p<0.05），包括Integrin β 3、Integrin α 2 β 1、Talin 1和Gelsolin等，说明人体骨质在衰变过程中发生了系统性变化，并体现在血清外泌体中。该研究可为骨质疏松研究提供潜在的分子标志物，有助于阐明其病变机制。     

有机化合物血卟啉及其衍生物被物理因素--超声激活机理研究

利用1，3-二苯基异苯并呋喃(DPBF)作为单线态氧捕获剂，研究了超声激活血卟啉的机理，通过用紫外-可见分光光度计测量了超声辐照配制好的血卟啉和DPBF溶液后的DPBF相对消耗量，表明了单线态氧的存在量．实验结果显示了DPBF的消耗量随超声照射时间和强度的增加而增加．从而支持了超声激活血卟啉产生单线态氧的说法．并提出了采用各向同性集光球把声致发光和声场分开的方法，进一步研究了是超声空化产生的荧光，还是高温热点激活血卟啉产生单线态氧．与白光对比结果表明，声致发光虽能使照相底版感光，但不足以激活血卟啉产生单线态氧．     

Synthesis and Crystal Structure of Diethyl 5-Acetoxy-3-（4-chlorophenyl）- 4,5-dihydroisoxazol-5-yl-5-phosphonate

1INTRODUCTION Isoxazole derivatives are an important class of heterocycles as intermediates for natural product synthesis and building blocks for constructing new molecular systems[1,2].In addition,isoxazole deriva-tives have been long targeted in synthetic inves-tigation for their known biological activities and pharmacological properties such as hypoglycemic,analgesic,anti-inflammatory and anti-bacterial acti-vities[3~6].Therefore,the isoxazolines and isoxazoles with phosphonate group ar…     

PHOTOPOLYMERIZATION OF PROPARGYL ACETATE WITH MICHLER’S KETONE AS PHOTOINITIATOR

Photopolymerization of propargyl acetate (PAT) with Michler's ketone (MK) asphotoinitiator in benzene has been investigated for the first time. Some features of the PATphotopolymerization with MK as photoinitiator is described.     

Scattering-Enhanced Femtosecond Optical Parametric Generation

Scattering-enhanced femtosecond optical parametric generation （OPG） has been observed and studied in detail, which may decrease the pump threshold of OPGs dramatically and may make OPGs reliable. The experimental demonstration in a LiNbO3 crystal shows that strong enough OPG can be obtained at pump intensity of only about 30GW/cm2 which is well below the crystal damage threshold Either a synchronized pulsed laser or a cw laser has been used as the scattering source, of which the wavelength, spectral shape and irradiating angle are not strictly required.     

Comparison benchmark between tokamak simulation code and TokSys for Chinese Fusion Engineering Test Reactor vertical displacement control design

Vertical displacement event(VDE) is a big challenge to the existing tokamak equipment and that being designed. As a Chinese next-step tokamak, the Chinese Fusion Engineering Test Reactor(CFETR) has to pay attention to the VDE study with full-fledged numerical codes during its conceptual design. The tokamak simulation code(TSC) is a free boundary time-dependent axisymmetric tokamak simulation code developed in PPPL, which advances the MHD equations describing the evolution of the plasma in a rectangular domain. The electromagnetic interactions between the surrounding conductor circuits and the plasma are solved self-consistently. The TokSys code is a generic modeling and simulation environment developed in GA. Its RZIP model treats the plasma as a fixed spatial distribution of currents which couple with the surrounding conductors through circuit equations. Both codes have been individually used for the VDE study on many tokamak devices, such as JT-60U, EAST, NSTX, DIII-D, and ITER. Considering the model differences, benchmark work is needed to answer whether they reproduce each other's results correctly. In this paper, the TSC and TokSys codes are used for analyzing the CFETR vertical instability passive and active controls design simultaneously. It is shown that with the same inputs, the results from these two codes conform with each other.     

多维分布特征化的一般性定理及其应用

本文得到了几个多维分布特征化的一般性定理,并讨论了它们的应用。这些定理改进了文〔4〕的所有结果。     

关于Poisson分布基本特征的一点注记

本文改进了S、D、Chatterji“关于Poisson分布的某些基本特征”的逆定理部分,从而在较弱条件下证明了它。     

An effective pumping method for increasing atomic utilization in a compact cold atom clock

We propose a simple pumping method to increase the effective population of cold atoms in the clock state and investigate the factors which affect the pumping efficiency in cold atom systems. We report the theory and demonstrate the corresponding experiment in an ⁸⁷Rb integrating sphere cold atom clock. The experimental results show that the population of cold atoms in the Zeeman sublevel |F=2, m_F=0> is approximately 1.62 times that of the result using optical pumping alone. This method can also be applied to increase the effective population in any one of the target Zeeman sublevels in other cold atom systems.