硒对慢性活动性肝炎的影响

５０例慢性活动性肝炎（慢活肝）随机分为治疗组和对照组。２５例治疗组接受１２周补硒治疗，结果显示，治疗组与对照组比较，血清ＡＬＴ显著下降，谷胱甘肽过氧化物酶活力明显升高，提示补硒能防治自由基引起的肝损伤，防止慢性肝病的发展。     

Synthesis, structure, and conductivity of molecular conductor (PyEt)[Ni(dmit)_2]_2

A new electrical conductive crystal PyEt[Ni(dmit)2]2 (dmit=4,5-dimercapto-1,3-dithiole-2-thione) has been synthesized and its X-ray structure has been determined to be in monoclinic system, C2/c space group. In PyEt[Ni(dmit)2]2 crystal, the conducting component [Ni(dmit)2]0.5- is face-to-face packed forming molecular column along the c-direction, and these molecular columns are then side-by-side extended along the a-direction forming a kind of two-dimensional conducting sheet on (010). The measured conductivity at room temperature along a certain direction on (010) plane is 10 S .cm-1. From 282 to 269 K, the crystal shows metallic behavior but changes to semiconductor below 269 K. Based on the measured crystal structure and calculated band structure, this conductor-semiconductor phase transformation can be primarily interpreted: The metallic conductivity is corresponding to the uniform molecular column and the atomic-lattice-chain structure of Ni chain, while the semi-conductive behavior to staggered mo     

Modulation of Tartrates with Various Counterions on the Phases of Calcium Oxalate in Gelatinous Systems

Effect of various counterions of tartrate on the crystallization of calcium oxalate in gel system was investigated using scanning electron microscopy and X-ray diffraction. Various tartrates with hydrogen (H2tart), sodium (Na2tart), potassium (K2tart), ammonium ((NH4)2tart), and a mixture of sodium and potassium cations (NaKtart) were considered. For H2tart, Na2tart, and (NH4)2tart, calcium oxalate dihydrate (COD) was induced. However, for K2tart and NaKtart,calcium oxalate trihydrate (COT) was obtained.     

Capacity Titration Technique for Determining the Solid Diffusion Coefficient of Intercalary Species within Insertion-host Materials

Investigation on the solid diffusion process of intercalary species within insertion-host materials plays an important role in the energy storage and output of secondary batteries1. To determine the solid diffusion coefficient, several electrochemical techniques have been developed such as galvanostatic intermittent titration (GITT)2,3, electrochemical impedance spectroscopy (EIS)4,5, potential intermittent titration technique (PITT)6, and potential step chronoamperometry (PSCA)7, potenti…     

二溴三烯丙基硫脲合镉单晶的拉曼光谱

将有一定极性或非极性的有机分子与金属离子进行络合形成非线性光学材料,是探索具有高倍频效率新晶体的有效途径.二溴三烯丙基硫脲合镉Cd(CH_2=CHCH_2NHCSNH_2)_3Br_2(简称ATCB)晶体就是基于无机畸变多面体与不对称共轭有机分子基团相结合的双重基元结构物理模型指导下的又一具有高倍频效率的新晶体.其粉末倍频效应为脲素的1.5倍,为KDP晶体的12.5倍.它具有较宽的透光波段和较高的非线性系数、较好的化学稳定性和     

葡萄酒分析中模式识别方法的研究：Ⅱ.原汁含量的多元判别分析

本实验采用常规分析方法，分析了１８个不同含汁量酒样的乙醇，总酸，挥发酸，固定酸，干浸出物，ｐＨ值，灰份，灰份碱度，总酚，甘油，钾，钠，镁，干浸出物与甘油比，Ｑ值，修正干浸出物共１７个变量。采用计算机模式识别技术，利用逐步判别方法，得出了葡萄酒中原汁含量种逐步别方法的判别函数和回判结果。     

λ-卡拉胶有限水解物在蛋白质置换层析分离中的应用研究

λ－卡拉胶经过有限酸水解得到不同平均分子量的组分，选用平均分子量为21kDa的组分，作为蛋白质置换层析的置换制，用于纤维素酶的分离纯化。经过置换层析，使黑色葡萄状穗霉S607发酵液中难以通过常规的分子筛和离子交换层析分离的一个内切酶组分（EGⅢ）和一个β－葡萄糖苷酶组分得到较好的分离。     

紧致流形的第一特征值下界

对紧致Riemannian流形(无边或带有凸边界)的第一(Neumann)特征值,用流形的直径和Ricci曲率的下界,给出一些新的下界估计.     

Synthesis and structure of catena cadmium complex with 2-hydroxo-l-naphthaldehyde thiosemicarbazono tetradentate ligand

The tide ligand (H2L) and its complex [CdL(py)2]py (L= C12H9N3OS dianionic) have been synthesized and characterized. The complex structure determination indicates that Cd( Ⅱ ) atom has a distorted octahedral coordination geometry. As an unusual tetradentate ligand, one L2- chelates one Cd( Ⅱ ) atom using the 0, S atoms and one N atom of the hydrazino group while its another N atom links to the neighbouring Cd atom. The bridging hydrazono groups extend the compound into a catena chain. The naphthoxy rings of each neighbouring unit are alternatively arranged at opposite sides of the chain, and the ring planes on the same side are parallel.     

Trapping and releasing of single microparticles and cells in a microfluidic chip

A microfluidic device was designed and fabricated to capture single microparticles and cells by using hydrodynamic force and selectively release the microparticles and cells of interest via negative dielectrophoresis by activating selected individual microelectrodes. The trap microstructure was optimized based on numerical simulation of the electric field as well as the flow field. The capture and selective release functions of the device were verified by multi-types microparticles with different diameters and K562 cells. The capture efficiencies/release efficiencies were 95.55% ± 0.43%/96.41% ± 1.08% and 91.34% ± 0.01%/93.67% ± 0.36% for microparticles and cells, respectively. By including more traps and microelectrodes, the device can achieve high throughput and realize the visual separation of microparticles/cells of interest in a large number of particle/cell groups.