γ－环糊精－SDS胶束电动色谱法分离十八甲基炔诺酮光学异构体

 研究了ＣＤ－ＳＤＳ胶束电动色谱（ＣＤ－ＭＥＫＣ）对电中性及疏水性的手性化合物的分离，并讨论了不同类型ＣＤ的手性识别作用。使用γ－ＣＤ可以有效地拆分十八甲基块诺酮（ＮＯＧ）旋光异构体。选择了最佳分离条件，通过调节ＣＤ和ＳＤＳ浓度以及其它操作条件可以把ＮＯＧ异构体很好的分离。     

SYNTHESIS AND CHARACTERIZATION OF (PPh_3)_3Co(μ-CO)_2 V(CO)_2Cp AND (PPh_3)

ＳＹＮＴＨＥＳＩＳＡＮＤＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦ（ＰＰｈ_３）_３Ｃｏ（μ－ＣＯ）_２Ｖ（ＣＯ）_２ＣｐＡＮＤ（ＰＰｈ_３）ＨＰｔ（μ－ＣＯ）（μ－ＰＰｈ_２）Ｖ（ＣＯ）_２ＣｐＣｈａｎｇＰｉｎｇＳＨＡＯ（ＤａｌｉａｎＩｎｓｔｉｔｕｔｅｏｆＣｈ?..     

SYNTHESIS AND CRYSTAL STRUCTURE OF [Na (DB18C6) (CH_3OH)]_2W_6O_(19) (DB18C

ＳＹＮＴＨＥＳＩＳＡＮＤＣＲＹＳＴＡＬＳＴＲＵＣＴＵＲＥＯＦ［Ｎａ（ＤＢ１８Ｃ６）（ＣＨ_３ＯＨ）］_２Ｗ_６Ｏ_（１９）（ＤＢ１８Ｃ６）·（ＣＨ_３ＯＨ）ＸｉａｏＭｉｎｄＬＵ；ＨｕｉＪｕＺＨＵ；ＳｈｕｎＣｈｅｎｇＬＩＵ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍ?..     

γ－环糊精－SDS胶束电动色谱法分离十八甲基炔诺酮光学异构体

研究了ＣＤ－ＳＤＳ胶束电动色谱（ＣＤ－ＭＥＫＣ）对电中性及疏水性的手性化合物的分离，并讨论了不同类型ＣＤ的手性识别作用。使用γ－ＣＤ可以有效地拆分十八甲基块诺酮（ＮＯＧ）旋光异构体。选择了最佳分离条件，通过调节ＣＤ和ＳＤＳ浓度以及其它操作条件可以把ＮＯＧ异构体很好的分离。     

用去氧胆酸盐和β-环糊精的毛细管胶束电动色谱拆分手性药物

用β－环糊精（β－ＣＤ）和去氧胆酸钠（ＳＤＣ）的环糊精改性毛细管胶束电动色谱，实际拆分了ＥＭＤ－５６４３１和扑尔敏两种手性药物，研究了ＳＤＣ和β－ＣＤ浓度及ｐＨ值对分离的影响。初步讨论了分离的机理。认为ＣＤ－ＳＤＣ体系中胶束单体分子几乎均被ＣＤ包合；ＣＤ可能与部分胶束单体包合而存在于ＳＤＣ的胶束中；该拆分体系中ＳＤＣ与β－ＣＤ的浓度比在４∶１～４∶３时拆分效果最好。并发现ＳＤＣ对β－ＣＤ有显著的增溶作用。     

用去氧胆酸盐和β-环糊精的毛细管胶束电动色谱拆分手性药物

 用β－环糊精（β－ＣＤ）和去氧胆酸钠（ＳＤＣ）的环糊精改性毛细管胶束电动色谱，实际拆分了ＥＭＤ－５６４３１和扑尔敏两种手性药物，研究了ＳＤＣ和β－ＣＤ浓度及ｐＨ值对分离的影响。初步讨论了分离的机理。认为ＣＤ－ＳＤＣ体系中胶束单体分子几乎均被ＣＤ包合；ＣＤ可能与部分胶束单体包合而存在于ＳＤＣ的胶束中；该拆分体系中ＳＤＣ与β－ＣＤ的浓度比在４∶１～４∶３时拆分效果最好。并发现ＳＤＣ对β－ＣＤ有显著的增溶作用。     

稀土离子与牛血Cu（Zn）—SOD的作用

采用ＥＳＲ、ＣＤ谱和荧光光谱研究了ｐＨ＝６．３时六次甲基四胺－ＨＣｌ缓冲溶液中ＬａＣｌ３和ＴｂＣｌ３与Ｃｕ（Ｚｎ）－ＳＯＤ的配位作用和结构。Ｃｕ（Ｚｎ）－ＳＯＤ可增强Ｔｂ＾３＋的荧光发射，Ｔｂ＾３＋与Ｃｕ（Ｚｎ）－ＳＯＤ有多个配位位置，其中有２个强结合位点，Ｌａ＾３＋可Ｔｂ＾３＋可竞争Ｃｕ（Ｚｎ）…ＳＯＤ上相同结合位点，７７Ｋ下Ｌａ＾３＋与Ｔｂ＾３＋使Ｃｕ（Ｚｎ）－ＳＯＤ的Ｃｕ＾２＋活性中心的配位     

SYNTHESIS OF TETRAMETHYLDISILANDIYL DICYCLOPENTADIENYL LANTHANIDE COMPLEXES AND STRUCTURE OF 〔Me_4Si_2（C_5H_4）_2Sm（μ－Cl）（THF）〕_2

ＳＹＮＴＨＥＳＩＳＯＦＴＥＴＲＡＭＥＴＨＹＬＤＩＳＩＬＡＮＤＩＹＬＤＩＣＹＣＬＯＰＥＮＴＡＤＩＥＮＹＬＬＡＮＴＨＡＮＩＤＥＣＯＭＰＬＥＸＥＳＡＮＤＳＴＲＵＣＴＵＲＥＯＦ〔Ｍｅ_４Ｓｉ_２（Ｃ_５Ｈ_４）_２Ｓｍ（μ－Ｃｌ）（ＴＨＦ）〕_２￥ＦｕＱｕａｎＳＯ...     

SYNTHESES， CHARACTERIZATION AND CATALYSIS OF （dppe）Rh（μ－CO）_2M（CO）_3（M＝CR，Mo，W） CARBONYL COMPOUNDS

ＳＹＮＴＨＥＳＥＳ，ＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮ ＡＮＤ ＣＡＴＡＬＹＳＩＳ ＯＦ （ｄｐｐｅ）Ｒｈ（μ－ＣＯ）_２Ｍ（ＣＯ）_３（Ｍ＝ＣＲ，Ｍｏ，ｗ）ＣＡＲＢＯＮＹＬ ＣＯＭＰＯＵＮＤＳ￥ＣｈａｎｇＰｉｎｇＳＨＡＯ；ＪａｉｅＹｕＷＡＮＧ；ＸｉｕＺ...     

BOND LENGTHS OF BUCKY-BALLS C_(60), C_(240), C_(540), AND C_(960)

ＢＯＮＤＬＥＮＧＴＨＳＯＦＢＵＣＫＹ－ＢＡＬＬＳＣ_（６０），Ｃ_（２４０），Ｃ_（５４０），ＡＮＤＣ_（９６０）￥ＬｅｉＬＩＵ；ＫａｉＴａｉＣＨＥＮ；ａｎｄＹｕＦｅｎＬＩ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓ，ＦｕｄａｎＵｎｉｖｅｒｓｉｔｙ，Ｓｈａｎ...     

手持式智能光度计的研制及应用

本文研制了手持式智能光度计。该仪器集成了光源、进样系统和检测器,体积小巧,采用吸入式进样系统取代比色皿设计,试剂消耗量仅为比色皿的10%。使用该仪器进行了甲醛标准样品测定,标准曲线回归系数为0.9979,相对标准偏差1.02%(n=5)。用于水发牛百叶等三种水发产品中甲醛含量的测定,结果令人满意。     

Cytomorphology‐based microchip with contour extraction processing for bioparticle analysis

In this paper, we demonstrated an integrated digital image processing framework that is training‐free for high throughput beads or biological cells detection and enumeration by the bead aggregation splitting algorithm. By making contour extraction processing, the aggregated beads can be clearly split for precise counting. It can be potentially embedded on‐chip in a miniaturized medical equipment to automatically adjust illumination condition and de‐noise. This study demonstrates that the existing hematological analysis can be updated from manual classification and counting by high‐speed and precise machine‐based programs.     

光圈性能测试仪的研制

介绍一种在实验室条件下对电视系统环境光照度适应范围测试的光圈性能测试仪.包括系统的组成和工作原理、主要技术难点及解决办法,给出了已达到的技术指标.该装置光学耦合系统的分辨率高,图像照度调整范围大、精度好、仪器结构紧凑,重量轻,性能稳定可靠.     

光照度探测器设计与精度校正

助航灯光系统为夜间或能见度较低环境下飞机的安全起降提供安全保障。快速准确地测量和判断其光强等级、光照射角等是否符合国际民用航空组织(ICAO)的标准,是保障机场安全运行的重要工作。本文设计了基于硅光电池的照度探测器,通过余弦校正器和不同滤光片的组合完成视见函数校正和照度探测的精度标定,实现了灯光的高速动态检测;完成了光照度探测器的线性标定和动态精度测量实验,照度测量误差率和动态测量误差均满足ICAO规定的要求;实现了助航灯光平行截面内光强的高速动态检测。     

A forth package for computer-controlled flow-injection analysis

An automated flow-injection system with a computer-controlled sample changer, injection device and digital photometer is described, for use with an Apple II. The software is understandable, flexible and easily adaptable to different computers provided with the programming language FORTH.     

A novel charge extraction method for the study of electron transport and interfacial transfer in dye sensitised nanocrystalline solar cells

A novel charge extraction method has been developed to study the transport, trapping and back reaction of photogenerated electrons in dye sensitised nanocrystalline cells (Grätzel cells). The cell is illuminated at open circuit until a steady state is reached in which the rates of photogeneration and of back reaction of electrons with tri-iodide are equal. The illumination is then interrupted, and the electron density is allowed to decay for a given time in the dark before short circuiting the cell using a solid state switch. For high efficiency cells, the integrated current measured at short circuit corresponds closely to the remaining electronic charge in the film. Small corrections are required to account for back reaction and substrate charging. The delay time between interruption of the illumination and short circuit charge extraction is varied systematically to follow the decay of electron concentration. Analysis of the time dependence of the electron charge indicates that the back reaction of electrons with I₃⁻ is second order in electron density, which is consistent with the formation of I₂^−. as an intermediate. Simultaneous measurement of the charge and photovoltage decay curves shows that the density of trap states decreases exponentially with trap depth.     

Determination of the density and energetic distribution of electron traps in dye-sensitized nanocrystalline solar cells

Electron transport and recombination in dye-sensitized nanocrystalline solar cells (DSCs) are strongly influenced by the presence of trapping states in the titanium dioxide particles, and collection of photoinjected electrons at the contact can require times ranging from milliseconds to seconds, depending on the illumination intensity. A direct method of determining the density and energetic distribution of the trapping states responsible for slowing electron transport has been developed. It involves extraction of trapped electrons by switching the cell from an open circuit to a short circuit after a period of illumination. An advantage of this charge extraction method is that it is less sensitive than other methods to shunting of the DSC by electron transfer at the conducting glass substrate. Results derived from charge extraction measurements on DSCs (with and without compact TiO(2) blocking layers) are compared with those obtained by analysis of the open circuit photovoltage decay.     

基于光线传感器的手机光度计设计与应用

利用智能手机的光线传感器设计了一款简易光度计,并为其开发了安卓手机应用,可以在线查看样品信号,自动计算吸光度值。此款简易光度计采用了液相色谱紫外检测器的流通池作为样品吸收池,利用光纤传导光信号,可以大幅降低试剂使用量。进行一次测试只需要使用约200μL样品,有效降低了实验室废液回收量。利用该光度计对铁离子标准溶液进行测定,在测定浓度范围内,吸光度与样品浓度具有良好的线性拟合关系,其中R2=0.9991,可取代化学实验中的传统分光光度计。利用该光度计进行实验可以强化学生对仪器和实验原理的理解,有利于培养创新意识。     

Determination of tin and methyltin species by hydride generation and detection with graphite-furnace atomic absorption or flame emission spectrometry

A method for the determination of tin and organotin species by hydride generation is described. Tin hydrides are detected by graphite-furnace atomic absorption, quartz-cuvette atomic absorption, or flame emission spectrometry with detection limits of 50, 50, and 20 pg as tin, respectively. Germanium interferences are eliminated with a dual-detector flame photometer with an electronic cancellation circuit.     

Recent progress in organic field-effect transistor-based integrated circuits

Organic integrated circuits are undergoing rapid development with the extensive research on organic semiconducting materials and the performance improvement of organic field-effect transistors. Organic integrated circuits not only cover all the major circuit types, their complexity, degree of integration, and performance have also been improved in recent years. In this review, recent advances in the design and fabrication of integrated circuits based on organic field-effect transistors are reported. The circuits are categorized into digital and analog, which are discussed in detail centering on the structure, fabrication process, and performance. In addition, progress in the modeling and simulation of organic integrated circuits are discussed as well, as they are key issues for the future development of organic electronics.