高速毛细管电泳-电导法测定茶碱的血药浓度

高速毛细管电泳技术(HSCE)的主要特点在于通过增大分离电压和缩短毛细管，将分析速度提高到几秒至几分钟内。采用高速毛细管电泳电导法对测定茶碱的血药浓度进行研究；优化选择缓冲介质、毛细管长度和内径、分离电压等实验参数，对从不同方面来提高分析速度进行初步探讨。结果表明：茶碱在60s内可以得到较好的分离测定，线性范围为37．85—0．15μg/mL，最小检出浓度为0．08μg/mL。此法快速、简便、灵敏，耗费低廉，符合临床监测血药浓度的要求。     

非衍生化毛细管气相色谱法分析雄性激素的研究

本文研究了典型雄激素睾酮和甲基睾酮毛细管气相色谱不经衍生反应直接测定的可行性以及影响检测灵敏度的各种因素。注样器３２０℃、柱温２６５℃、４ｍＯＶ－１０１毛细管短柱、ＦＩＤ检测器，恒温和程序升温均可直接测定上述化合物，捡出限分别为２ｎｇ和１．５ｎｇ。     

毛细管电泳-激光诱导荧光测定血样中格列吡嗪

本文建立了毛细管电泳-激光诱导荧光法测定格列吡嗪的新方法．采用异硫氰酸荧光素（FITC）为衍生剂，考察了衍生缓冲溶液类型、浓度、pH、反应计量比及背景缓冲溶液类型、pH值、浓度、进样时间、分离电压等对测定格列吡嗪效果的影响．使用未涂层的毛细管柱（47cm×50μmi．d．，有效柱长40cm），10mmol／LNaHCO3-Na2CO3（pH=9．6）为衍生缓冲溶液，在25℃时，异硫氰酸荧光素与格列吡嗪计量比为40：1条件下闭光反应12h后，以40mmol/LNa2B4O7-NaHCO3（pH=9．4）为背景溶液，在激光波长488nm、运行电压14KV条件下，血浆样品用微超滤除蛋白后直接测定．线性范围为2．24×10^-10～1．12×10^-8mmol／L（r=0．9986），检出限为10^-10mmol/L．虽然血清白蛋白并不影响测定，但为了降低毛细管的污染，减小毛细管后处理程序，提高分析速度，延长毛细管使用寿命，采用快速微超滤取样以除去蛋白，取得良好效果．     

气相色谱法悚测定白酒中的甲醇和杂醇油

确定了白酒中的甲醇和杂醇油气相色谱测定方法，采用直接进样和毛细管色谱柱，ＧＣ－ＦＩＤ测定，甲醇和杂醇油的平均回收率分别为９７．９％和９７．１％，方法简便、快速、准确，结果令人满意。     

运用毛细管电泳技术测定药物中有效成分

研究了运用毛细管电泳技术快速测定国产某成品药物胶囊中有效成分布洛分含量的方法，实验采用50 μm内径石英毛细管，紫外检测设定在214nm，缓冲液PH为6．864的磷酸盐溶液，在11KV运行电压下，6min内检测内布洛芬，定量检测每粒质量为0．3902g胶囊中布洛芬的含量为0．3869g。     

用双毛细管喷雾器和火焰原子吸收微分法测定人发和调味品中的铅

在氢化物发生和火焰原子吸收分光光度法中使用的同心双毛细管喷雾器被应用于测定头发、食盐，醋和鱼露中的铅含量．让一根毛细管吸喷１％ＫＢＨ４溶液，另一根吸喷含有１％Ｋ３［Ｆｅ（ＣＮ）６］和 ０．３ｍｏｌ·Ｌ－１ＨＮＯ３的铅溶液．用装有微分放大器的简易型火焰原子吸收分光光度计测量在空气－乙炔焰中产生的原子吸收信号．使方法的灵敏度明显提高．所建立的标准曲线的线性范围为０．０１６－０．５６ｐｐｍＰｂ．当８次测定０．０３２ｐｐｍＰｂ时，相对标准偏差小于４％．     

β-环糊精与中性化合物结合常数的测定

在二元环湖精体系中采用毛细管电泳法测定了β-环糊精与中性化合物的结合常数．在磷酸盐缓冲溶液浓度10mM，硫酸化环糊精的浓度为2．5mM，pH为7．20的条件下，测得的β-环糊精与1-萘酚和2-萘酚的结合常数分别为80．50M^-1，720．99M^-1，519．00M^-1，并将比测定值与光谱法测定值进行了比较．结果表明，本文采用的方法快速可靠，适用于测定中性环糊精与中性化合物的结合常数．     

赤泥浆体管道输送参数的计算方法

对氧化铝厂未级尾矿浆体──赤泥浆体的流变特性和管道输送特性进行了研究．实验中．使用自制的毛细管粘度计通过校正测定了浆体的粘度，分析了流变参数随浓度和温度的变化规律，研究了在现场中浆体出现的两种流态的水力坡降，并给出了它们的计算方法．     

毛细管气相色谱法同时测定盐酸头孢他美酯中7种有机溶剂的残留量

采用毛细管气相色谱法测定了盐酸头孢他美酯中7种溶剂的残留量．色谱条件为：HP-FFAP色谱柱、程序升温、载气为氮气、FID检测器，以甲基异丁基酮为内标法进行测定．在选定的色谱条件下，测得各有机溶剂的线性良好，平均回收率为97．8％～100．3％，RSD为0．89％～3．12％，最低检出限为1．5—3．6mg·L^-1该方法简单、快速、准确，适用于盐酸头孢他美酯中有机溶剂残留量的测定．     

大孔径毛细管气相色谱法快速测定饮料中的普鲁卡因

采用固相萃取技术，以二十二烷为内标，FID检测器检测，建立了一种测定饮料中普鲁卡因的大孔径毛细管气相色谱方法，测定结果表明普鲁卡因检测的线性范围为ρ(普鲁卡因)=0．04mg／L～64mg／L，其最低检测质量浓度为0．04mg／L，相对标准偏差为2．6％，平均回收率为85．6％。     

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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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.     

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。     

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