分子膜

By studying the membrane preparation process for the typical membrane materials of polystyrene and cellulose acetate as well as a new type membrane material of polyvinyl butyral,the effects of operating parameters on the membranes structure are determined.By the study on the thermodynamics involved in the ternary systerms of ScCO_2/solvent/polymer and the calculation of theoretical ternary phase diagrams,the phase demixing behavior during the membranes formation by ScCO_2 induced phase separation process are described.By studying thermodynamics involved in the quaternary systerms of ScCO_2/solvent/additive/polymer,the effect of a low molecular weight additive on the quaternary phase diagram and dimixing speed are revealed.

通过对传统膜材料聚苯乙烯、醋酸纤维素及新型膜材料聚乙烯醇缩丁醛进行ScCO_2诱导相转化制膜工艺的实验研究，给出了操作参数对膜形态结构的影响规律；通过研究ScCO_2/溶剂/聚合物三元体系热力学问题，并计算出相应铸膜体系的三元相图，对ScCO_2诱导相转化膜制备过程的分相成膜行为进行了分析与描述；通过研究ScCO_2/溶剂/小分子添加剂/聚合物四元铸膜体系的热力学问题，并借助于四元体系理论相图计算的结果，分析了小分子添加剂对相分离过程的影响。

The ultrastructural changes during the development of sieve element companion cell complex (SE/CC complex) in Populus deltoides were investigated using electronic microscopy. The result showed that SE and CC tome from the same secondary phloem mother cell. The development of sieve element went through three stages, i. e. immature, mature, and degenerate stage. In immature stages the sieve element presented radial expansion, cell wall thickening, and production of sieve plastid and P-protein. The cytoplasma selectivly autolysed in mature stage. At the same time, karyoplasm was dispersed, and nuclear envelope was not clear, or karyoplasm was disorgnized, and nuclear envelope was clear. The karyopalsm finally turned into P-protein. In degenerate stage, the cytoplasm completely disappeared, and the function was lost.

利用电镜技术研究美洲黑杨次生韧皮部筛管和伴胞发育过程中细胞超微结构的动态变化，观察到筛管和伴胞由同一个次生韧皮部衍生细胞分裂分化形成筛管约发育历经未成熟期、成熟期和衰退期的变化未成熟期筛管分子表现为细胞的径向扩展、壁的增厚、筛管质体和P-蛋白质的产生；成熟期筛管分子细胞组分发生选择性自溶，细胞核核质弥散状，核膜不清晰，或核膜清晰而核物质降解，最后细胞核完全解体转化为P-蛋白质类的物质；衰退期筛管分子细胞质完全解体消失，失去功能。

The components and molecular aggregation in mixed Langmuir films and LB films are strongly affected by some non-covalent intermolecular interactions, such as electrostatic interaction, hydrogen bond, complexation, van der Waals force, etc.

在混合Langmuir膜和LB膜中，分子的组分和集合形态在很大程度上受到分子间作用力的影响，这种分子间作用力都是是非共价力，如静电相互作用、氢键、配位、范德华力等作用。

A brief introduction of molecular imprinting technology and molecularly imprinted membrane is outlined.

文中首先简要介绍了分子印迹技术及分子印迹膜，继而对分子印迹膜的制备方法进行了评述，并对现有的分子印迹膜的应用及研究方向进行了介绍和展望。

But at low pressure, the continuum theory is no longer suitable and only the molecular dynamics method is passably valid. However, there have been yet a few studies on the squeeze film of micro-resonators in the free-molecule regime, and no 3D model of MD has been presented for SFD.

当气压很低时，气体连续介质模型不再适用，只能采用分子动力学方法但是，当前关于自由分子区域中的微谐振器件挤压膜阻尼的分子动力学研究非常少，为了避免计算量过大，还未有三维的挤压膜阻尼分子动力学模型。

The Langmuir Blodgett technique was employed to modify the PVC liquid membrane, the LB film of trioctylcetyl ammonium chloroauric acid was deposited on the surface of PVC liquid membrane, and the gold selective electrode with such modification has been fabricated.

1引百 LB膜技术〔''是近年来超分子组装化学中应用最多和相对最成功的分子装配技术，因能较好地在许多固体表面按设计方式组装空间有序的超分子体系，特别是其器件研制最基本的实验手段之一卿，由于LB膜修饰层有序，高密，超薄，能从根本上改进电极体系及其反应过程的性质和行为

The mechanism of molecular distillation was analyzed in this paper.Stationary,falling-film,the UIC and centrifugal molecular distillatory in common use,and also the application and the development tr...

本文分析了分子蒸馏技术的机理，介绍了目前常用的静止式、降膜式、刮膜式和离心式分子蒸馏器，以及分子蒸馏技术在化工、医药、轻工和食品行业的应用情况和发展趋势。

We also strongly suggest that the recently reported chaperone acitivity of periplasmic PDI-ase and PPIase assayed by traditional substrate should be reexamined using periplasmic proteins as substrate due to the significant difference between those two classes of proteins, the possible chaperone fuctions of PDIase and PPIase in vivo should be reappraised.

同时，由于本实验结果显示膜间质蛋白与常用的分子伴侣测活底物蛋白在聚集行为上存在极显著的区别，我们建议对最近报导的膜间质蛋白二硫键异构酶和脯氨酸顺反异构酶分子伴侣活性以膜间质蛋白为底物再进行验证，对其在膜间质是否发挥分子伴侣功能重新慎重考虑。

POMs and deys are still maintained integrallty.AFM exhibits the films is even.The thickness of each layer is about 1.25nm. The AFM images reflect that there are some protuberances on the outer surface layer of the film, which due to the aggregates of spherical structure PMo12. Cyclic Voltammograms reflects the redox potentials of dye in multilayer shifts towards more positive values than pure dye multiplayer which may be explained by charge transfer from dye to POM. Fluorescence spectra show that polyoxometalates caused the fluorescence decay of dyes, which maybe used as fluorescence sensors.

UV-VIS说明复合膜均匀生长； IR 光谱、XPS能谱研究结果表明，紫外光照前后，膜中多酸/染料分子间没有发生显著的光化学反应，各组分的结构仍然保持；原子力显微镜显示，膜的外表面是均匀的，每一个双层厚度大约是1.25nm，膜表面的隆起，可能是多酸阴离子簇堆积所引起；循环伏安测定结果表明，由于多酸阴离子的影响，有机染料的氧化还电位发生了正的偏移，反映出复合膜中染料分子与多酸阴离子间发生了荷移相互作用，导致染料分子失去部分电子而使氧化性略强；荧光光谱研究结果表明，多酸阴离子可以有效地引发荧光染料的荧光淬灭，这为多酸在荧光传感器方面的应用提供了有价值的信息。

The relation between the quality of the transfer film and the anti-wear quality of the PPTA molecular deposited film was also discussed.

研究了制膜溶液相态的不同对溶致液晶聚芳酰胺分子沉积膜摩擦学性能的影响，分析了PPTA分子沉积膜向对偶面的转移与沉积，并讨论了转移膜性能与PPTA优良的抗磨减摩性能之间的关系。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。