离体玉米精细胞的电泳分析与分离

细胞显微电泳表明，介质ＰＨ值对离体玉米精细胞电泳迁移率有较大影响，在ＨＣｌＧｌｙ（甘氨酸）缓冲液中，其等电点介于ＰＨ２．４－３．０；在ＰＨ６．７的ＭＥＳ缓冲液中，电泳后统计分析表明，离体玉米精细胞可以区分为电泳迁移率有差异的２种类型，其电泳迁移率分别为（１．８０３±０．０４３）×１０＾－６和（１．６６７±０．０５２）×１０＾－６ｍ＾２．Ｖ＾－１．ｓ＾－１。根据电泳迁移率的差异，利用一种支无持细胞电     

Ｂｅｉ醌类化合物产生菌液态发酵工艺的初步优化

对产生Ｂｅｉ醌类化合物的寄生菌属真菌（Ｈｙｐｏｍｙｃｅｓ（Ｆｒ．）Ｔｕｌ．ｓｐ．）的液态发酵工艺做了初步优化．通过单因素分析及正交实验法确定了液态发酵工艺的最优条件；通过菌体干重、醌类化合物产量与ＰＨ值在时间上的对应关系找到了一种确定发酵进度的方法．     

微细氧化镍粉的制备(英文)

以硫酸镍为原料,用草酸盐淀淀－煅烧方法制备了粒度为１－５μｍ的微细氧化镍颗粒。得出了最佳工艺条件：ｃ（ＮｉＳＯ４）＝０．５－１．５ｍｏｌ／Ｌ,ｎ（Ｃ２ｏ６２－４）：ｎ（Ｎｉ＾２＋）＝１．２－１．３：１,ｐＨ＝４－５,沉淀温度４０－５５℃,煅烧温度５００－９００℃,煅烧时间４－６ｈ。     

内蒙古库布齐沙带东段油蒿固定沙丘土壤微生物数量的垂直分布研究

对内蒙古库布齐沙带东段油蒿（Ａｒｔｅｍｉｓｉａｏｒｄｏｓｉｃａ）固定沙兵土壤微生物数量的垂直分布进行了研究．１）好气性细菌和真菌数量的垂直分布是结皮层（０－０．５ｃｍ）〉０．５－１０ｃｍ〉３０－４０ｃｍ〉６０－７０ｃｍ,在０－１０ｃｍ,油蒿固定沙丘与流动沙丘比值;好气性细菌数量为１３．７：１,真菌数量为１５．２：１;２）芽孢细菌和放线菌数量的垂直分布是０．５－１０ｃｍ〉３０－４０ｃｍ〉结皮层（０－     

带鱼内脏蛋白酶的性质

带鱼内脏提取液的蛋白酶活力，在ＰＨ２．２￣９．０之间有三个峰值出现，这说明提取液中存在酸性（最适ＰＨ为３．６）、中性（最适ＰＨ为６．８）及碱性（最适ＰＨ为８．４）蛋白酶；这三类蛋白酶在作用时间为３０ｍｉｎ时，最适温度分别为５０℃，５０￣６０℃，５０￣６０℃，温度对酶水解速度影响很大，内脏蛋白酶在０℃的水解速度是最适温度的１．７５％￣２．７１％。ＮａＣｌ，ＦｅＣｌ３，ＺｎＳＯ４，ＣａＣＬ２，ＥＤＴＡ     

壳聚糖包埋Ru(bpy)2+3/SiO2复合膜电极电化学发光特性

制备了壳聚糖包埋Ｒｕ（ｂｐｙ）＾２＋３／ＳｉＯ２复合膜电极,对其电化学发光特性的研究表明：铂和玻碳复合膜电极循环伏安曲线的阳极峰分别在１１５０和１３７０ｍＶ,阴极峰分别在１０５０和１２６０ｍＶ;复合膜电极的荧光发射光谱位于５８５ｎｍ;电极的响应时间为１０ｓ,对基质具有电位和ＰＨ选择性;对５．５＊１０＾－４－１．０＊１０＾－２ｍｏｌ．Ｌ＾－１的草酸和抗坏血酸分别有相关系数为０．９９５和０．９９２的线     

黑曲霉AJ1958菊粉酶的产生和性质

从菊芋根际土壤中分离出一株菊粉酶（ＩｎｕｌｉｎａｓｅＥ．Ｃ．３．２．１．７）产生菌，经物理和化学诱变得高酶活黑曲霉突变株ＡＪ１９５８．该菌株在培养基（０．０７ｇ／ｍＬ菊芋提取液１０００ｍＬ，豆饼粉５ｇ，麸皮５ｇ，ＫＣＩ０．７ｇ，ＦｅＳＯ４·７Ｈ２Ｏ０．０１ｇ，ＭｇＳＯ４·７Ｈ２Ｏ０．５ｇ，ＰＨ５．０）中，于３０℃振荡培养３ｄ，酶活力可达６４μｍｏｌ·ｍｉｎ－１．酶水解反应的最适ＰＨ为３．０～４．０，最适温度为６０℃，在ＰＨ２．５～５．５的范围内和７５℃以下较稳定．适宜条件下，１０ｈ内０．０５ｇ／ｍＬ的菊粉溶液中之底物几乎１００％被酶水解．产物糖中果糖质量分数为９３％，葡萄糖质量分数为５．６％．该突变株产生的菊粉酶具有较满意的水解性和热稳定性．     

一株聚β—羟基丁酸高产菌株的分离与研究：Ⅱ.出发菌株的筛选？…

从城市生活污水中分离筛选到一菌株,具如下主要特征：杆菌,（０．８５－１．２）＊２．０－５．０）μｍ;革兰氏染色阴性;具衣鞘,细胞包在鞘里,丝状体很长,但无分枝;亚端生鞭毛;胞内具ＰＨＢ颗粒和异染颗粒;液化明胶微弱;菌落为光滑型和丝状两种。经鉴定该菌株为浮液球衣细菌。     

对叔丁基苯甲酸的合成

以对叔丁基甲苯（ＰＴＢＴ）为原料,氧气为氧化剂,冰醋酸为溶剂,醋酸钴为催化剂,考察了合成对叔丁基苯甲苯甲酸（ＰＴＢＡ）的影响因素,确定了该氧化过程的最佳工艺条件：反应温度９０～９５℃,原料与溶剂配比１：４（ｍ：ｍ）,催化剂质量浓度ｗ＝０．１～０．２,ＰＴＢＴ的化率可达１００％,收率为８７％。     

锑在硼砂溶液中阳极极化膜半导体性质的研究（续）

本工作利用白光电流和交流阻抗法研究了锑在０．０５ｎ１Ｏｌ·ｄｍ￣（－３）Ｎａ＿２Ｂ＿４Ｏ＿７＋、０．５ｍｏｌ·ｄｍ“Ｎａ２Ｓｏ４溶液中（ＰＨ一９．ｌ，３０Ｃ）于１．２ｖ（ｖＳ。ＳＣＥ）阳极形成膜的半导体性质。实验结果表明，该阳极膜是一种ｎ型半导体，其平带电位为一０．３６Ｖ，施主密度为２．８×ｌ０￣１８ｃｍ￣（－３）。讨论了锑增加对在硫酚溶液中形成的阳极ｐｂ（Ⅱ）氧化物膜生长的影响。     

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