双([)6-氧(∈)3-间硝基苯磺酰基-丁二酸-1,4-单酯-4(∈)(])β-环糊精的合成及模拟抗坏血酸氧化酶

为建立更多更好的模拟酶定量测定方法,用β-环糊精、马来酸酐、间硝基苯磺酰氯和三氯化铁反应,合成了双([)6-氧(∈)3-间硝基苯磺酰基-丁二酸-1,4-单酯-4(∈)(])β-环糊精·Fe3+配合物,以此配合物与H2O2形成复合物,模拟抗坏血酸氧化酶,将抗坏血酸催化脱氢生成脱氢抗坏血酸.在最佳条件下,催化反应可在3 min内反应完全.初速度显示出良好的线性,模拟酶催化速率较快,为下一步用此模拟酶测定相关物质含量提供了可能.     

双6-氧■3-间硝基苯磺酰基-丁二酸-1,4-单酯-4■β-环糊精的合成及模拟抗坏血酸氧化酶

为建立更多更好的模拟酶定量测定方法,用β-环糊精、马来酸酐、间硝基苯磺酰氯和三氯化铁反应,合成了双6-氧3-间硝基苯磺酰基-丁二酸-1,4-单酯-4β-环糊精.F e3+配合物,以此配合物与H2O2形成复合物,模拟抗坏血酸氧化酶,将抗坏血酸催化脱氢生成脱氢抗坏血酸.在最佳条件下,催化反应可在3m in内反应完全.初速度显示出良好的线性,模拟酶催化速率较快,为下一步用此模拟酶测定相关物质含量提供了可能.     

β-环糊精及其衍生物对甾类生物化合物的分子识别研究

以酚酞为光谱探针，在25℃采用紫外-可见光谱滴定法，分别测定了β-环糊精（β-CD）、2，3，6-三[氧-（2-羟基丙基）]-β-环糊精（HP-β-CD）及2，3，6-三（甲氧基）-β-环糊精（MO-β-CD）与3种生物胆汁盐分子形成超分子配合物的稳定常数．结果表明，3种甾类生物分子客体与3种环糊精主体之间的键合能力和选择性主要受疏水相互作用和氢键的影响．几种非共价键弱相互作用协同贡献于主-客体的包结配位过程．     

β-环糊精对化合物RSA的增溶研究

化合物17α-羟基孕甾4-烯-3，20-二酮-21-醋酸酯（RSA）和β-环糊精（β-CD）经超声波处理15min，在28℃，120r／min振荡处理12h，形成包结物。β—CD—RSA包结物的紫外吸收特征与化合物RSA一致。在水溶液中，β—CD与化合物RSA的包结物，化学平衡常数K1的RSD为2．84％，较为稳定，推测在水溶液中β—CD与化合物RSA以1：1（摩尔比）形成包结物。红外光谱分析推测出在水溶液中β—CD与化合物RSA的包结方式。β-CD与化合物RSA摩尔比为1：1形成的β—CD—RSA包结物，在28℃水溶液中的溶解度为9．12mg／L，比化合物RSA饱和溶液的溶解度增大了5．26倍。     

β—环糊精构筑模拟葡萄糖氧化酶的研究

采用β－环糊精（β－ＣＤ）二间羟基苯磺酸酯同三氯化铁形成的配合物构筑模拟葡萄糖氧化酶，与过氧化氢形成酶－底复合物，将葡萄糖催化氧化生成葡萄糖酸，研究了模拟酶浓度、葡萄糖浓度及温度对模拟酶催化反应的影响。     

MMoVPAs杂多化合物膜对环己烷催化氧化脱氢反应的研究

用组合法合成HxKzM0.76Mo11VPAs0.68Oy系列杂多化合物，以浸渍负载于多孔钛片上制成催化剂膜，在自制膜式反应釜中对环已烷进行催化脱氢生成苯的反应，探讨了Fe^3 ,Bi3 ,K^ 的加入对催化剂催化脱氢反应性能的影响。结果表明：Fe^3 ,Bi^3 ,K^ 的加入都能很好的提高催化剂的催化脱氢反应性能。特别是铋离子的加入，能大大的提高环已烷的催化脱氢生成苯的效果。组成为HxK0.37Bi0.76PVAs0.68Mo11Oy的杂多化合物膜催化剂对环已烷的催化氧化脱氢反应有着良好的催化活性。在适宜的条件下，环已烷的催化氧化脱氢最高收率可以达到25．8％。     

含醚基芳香桥联β-环糊精对模型底物的分子识别研究

用紫外和荧光光谱研究了4，4’-二胺二苯基醚桥联（6-氨基-6-脱氧-△-环糊精）（2）对几种模型底物，如8-苯胺基-1-萘磺酸钠（ANS）、2-对甲苯胺基-6-萘磺酸钠（TNS）、罗丹B（RhB）和亮绿（BG）的包结行为。结果表明，通过两个环糊精单元协同键合-个客体分子，主体2对所考察的客体分子的键合能力得以提高，达到β-环糊精的1．5-16倍。主体2与客体BG形成了最稳定的超分子配合物，其稳定常数高达18475M^-1。从多重识别作用机理方面探讨了影响主客体包结稳定常数的因素。     

超分子体系中的分子识别研究27.单—［6—（8—氧喹啉基）？…

采用荧光光谱滴定法测定了单－［６－（８－氧喹啉基）］－β－环糊精（２）与９种脂肪醇、３种脂肪酸和樟脑手性对映体在磷酸缓冲溶液中,２５℃时形成超分子配合物的稳定常数,并与母体β－环糊精（１）的分子键合能力进行了比较。研究结果表明,客体分子的结构与主体化合物空腔的尺寸匹配决定了所形成超分子配合物的稳定性,即范德华力和蔬水相互作用是分子识别的主要驱动力,而氢键作用对超分子配合物的稳定性有重要影响。键合到     

荧光光谱法研究β—环糊精对小檗碱的包结作用

用荧光光谱法研究了小檗碱与β－环糊精包结物的性质，并利用稳态荧光法测定了在不同pH值下小檗碱与β环糊精的形成常数，结果表明：小檗碱与β－环糊精以1：1配合；中性条件下，β环糊精与小檗碱有最大的包结能力；疏水作用以及构型识别是形成包结物的原因。     

双-{N-[2-脱氧-β-D-吡喃葡糖-2-(3-甲酰基水杨酸胺)]} 金属合物及其金属胶束催化PNPP水解动力学

作者合成和表征了双－｛N-[2-脱氧－β－D－吡喃葡糖－2－（3－甲酰基水杨酸胺）]｝M2（Ⅱ）配合物（M＝Cu,Zn,Co）；研究了该双核金属配合物在CTAB胶束溶液中催化PNPP水解反应动力学；用双核复合物金属胶束的三元复合动力学模型对实验结果进行了定理处理，结果表明：配合物在CTAB胶束溶液中形成金属胶束后，催化水解的能力明显增强，可使反应速率提高几百倍至二千多倍，金属配合物催化水解的速率常数大小顺序为Cu(Ⅱ），Zn（Ⅱ）和Co(Ⅱ)。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to