Development of a Novel Chemiluminescent Probe with a Higher Efficiency than LucigeniiT

A many efforts have been made to take advantage of the chemiluminesce of lucigenin and acridine derivatives, especially for analytical purposes. Aryl acridinium esters have been used as labels for the immunoassay of both large and small molecules. Lucigenin is more stable and higher quantum yield than acridinium ester,but it has not been used as labels in immunoassay and DNA probes,because it dose not have a label moiety group, so for.     

Effect of Acetonitrile on Ionization and Excitation in Inductively Coupled Plasma Measured by Optical Emission Spectrometry

With the development of life science and environmental science, the increasing requirements on understanding the mechanism of trace element effects on ecology and human health become more and more obvious. The concept of "total amount of element" or its "valence" is not enough to give a satisfactory explanation about the events exactly happen in nature. As a result, metal compound speciation has become more and more important and challenging.     

Velocity Profiles of Slow Blood Flow in a Narrow Tube

A fractal model is introduced into the slow blood motion. When blood flows slowly in a narrow tube, red cell aggregation results in the formation of an approximately cylindrical core of red cells. By introducing the fractal model and using the power law relation between area fraction φ and distance from tube axis ρ, rigorous velocity profiles of the fluid ia and outside the aggregated core and of the core itself are obtained analytically for different fractal dimensions. It shows a blunted velocity distribution for a relatively large fractal dimension (D～2), which can be observed in normal blood; a pathological velocity profile for moderate dimension (D = 1), which is similar to the Segre-Silberberg effect; and a parabolic profile for negligible red cell concentration (D = 0), which likes in the Poiseuille flow.     

激光诱导氩气等离子体时间分辨特性研究

激光诱导击穿光谱(L IB S)以激光诱导微等离子体的原子发射为技术特征,在科研与工业领域正得到重视与蓬勃发展.作为环境气体的氩气对等离子体演化过程中粒子的碰撞过程有重要影响,决定着L IBS技术分析性能的发挥.利用光谱诊断技术深入研究LIBS技术条件下氩气的光谱特征,对于提升LIBS技术及其应用水平具有重要的意义.利...     

酶促反应动力学教学刍议:米氏方程衍生公式与图像

许多国内外高校的本科教学缺乏对米氏方程的深入推衍,这对学生了解酶促反应的动态过程及在实际科研工作中的应用是极为不利的。从酶促反应方程出发对米氏方程进行推导,继之采用双倒数法、单倒数法、直接隐函数法、间接隐函数法以及积分法对米氏方程进行线性化,得到适用于不同情况的衍生方程。从数学和酶学角度出发指出了不同方程的优势和缺点,并针对其缺陷提出了若干解决方案以及在实际应用过程中的注意事项。希对高校中有志于科研事业的相关专业的教师学生有所助益。     

基于运动补偿和码率预分配的干涉多光谱图像压缩算法

提出了一种基于运动补偿的三维小波变换和基于码块预测的码率预分配的图像压缩算法.利用干涉多光谱图像成像推扫平移特性,在小波变换中使用运动补偿来减少帧间相关性,并对图像组中各个图像小波变换和量化后EBCOT编码码块的有效比特平面进行独立的熵估计.以图像估计熵总和指导整个图像组码率预分配,以解决平均分配码率对重建图像质量带来的影响.实验结果表明:该算法在8倍压缩时,图像序列的平均峰值信噪比比3D-SPIHT提高了0.85～1.25 dB,比单帧JPEG2000提高了1.91～4.25 dB, 算法复杂度低,易于硬件实现.     

不饱和碳碳键电化学加氢的最新研究进展

选择性加氢是有机合成反应中最为经典的反应之一,在天然产物、药物和工业化学品的制造中有着广泛的应用。传统的加氢反应因为其高温高压、危险系数大和使用贵重金属等诸多不利因素,所以人们一直希望能发现更安全温和的加氢反应方法。近年来,由于电化学加氢方法反应条件温和、能量消耗低及反应进程容易控制等优势越来越受到人们的重视,并取得了许多研究成果。本综述依据电化学加氢反应的化学键类型,对近几年来的不饱和碳碳键电化学加氢相关文献报道进行了归纳和综述,有望为电化学加氢研究提供一定指导意义。     

流体力学分区算法及相关理论问题

分区计算是计算流体力学中处理复杂几何区域、多块物体相互运动和进行并行计算的一类重要方法.对分区算法、相关理论问题和一些数值现象进行了综述.     

Synthesis and Surface Modification of CdTe Nanocrystals

IntroductionThe study on semiconductor nanocrystals has re-ceived considerable attention in the past decades[1—4].Because of the quantum confinement effect, smallnanocrystals show very special physical and chemicalproperties when their sizes are close to…