丙型肝炎病毒E2基因在转基因番茄植株中的表达

以T-E1E2为模板扩增得到丙型肝炎病毒包膜蛋白基因E2,构建该基因的植物表达载体p35s-E2．通过农杆菌介导的叶盘法转化番茄子叶．转基因番茄植株叶片总DNA的PCR、Southern blot检测结果表明,E2基因已整合进了转基因番茄植株基因组中;RT-PCR,Western blot分析证实E2基因在转基因番茄植株叶片中表达．     

农杆菌介导的二氢黄酮醇3''5''羟化酶cDNA对非洲菊的转化及对其花色的影响

通过非洲菊(Gerbera hybrida)组织培养建立起适合于农杆菌介导的基因转化受体系统，非洲菊叶柄外植体在MS 3mg／L BA 0．01mg／L NAA培养基中直接诱导芽生长，在MS 0．1mg／L NAA培养基中生根培养，获得再生植株，诱导率达57％。带有云南矮牵牛(Petunia hybrida)二氢黄酮醇3’5’羟化酶cDNA的pEH表达载体与农杆菌（Agrobacterium tumefaciens）LBA4404融合后，与非洲菊叶柄外植体共培养3d，通过含有卡那霉素25mg/L和羧苄菁霉素500mg/L的选择培养，诱导出转基因非洲菊。经PCR和Southern分子杂交检测，证明目的基因已整合入非洲菊的基因组中，转基因非洲菊花色、花型及叶型都有显变化。     

农杆菌介导IPT和etr1-1双基因转化番茄

建立了番茄子叶高频再生体系，优化了农杆菌介导的外源基因转化番茄的条件，将IPt和etrl-1双基因导入番茄中，以除草剂PPT作为筛选标记，得到3株转化再生植株．通过PCR，RT-PCR检测证明etrl-1和IPT基因已整合到转基因番茄植株的基因组中，并在转录水平有一定表达．     

转人Cu,Zn-SOD基因马铃薯的研究

采用RT—PCR技术从人肝总RNA中分离扩增了490bp的人铜锌超氧化物歧化酶(hCM，Zn—SOD)基因的cDNA序列，进行了序列测定，结果和文献报道的一致；构建了CaMv35S启动子驱动hCu，Zn—SOD基因的植物表达载体PBICuSOD；用三亲交配法将重组质粒PBICuSOD转化到农杆菌LBA4404，转化马铃薯得到转基因植株。PCR和Southern—blot分析证明，hCu，Zn—SOD基因巳整合到马铃薯基因组中。Western blot分析表明，hCu，Zn—SOD基因在转基因马铃薯植株中得到表达。用NBT光还原法测定转基因马铃薯植株中的SOD酶活力，叶的总酶活为1066．6U／g(湿重，下同)，块茎的总酶活为10llU／g。     

苜蓿花叶病毒RNA2 3''''端cDNA转基因烟草及其抗病性研究

将本室克隆的编码复制酶基因3′端约1／2序列及其3′端非编码区的苜蓿花叶病毒中国分离株(AIMV-Ch)RNA：3′端cDNA，重组到植物表达载体pROKⅡ中，通过致瘤农杆菌(Agrobacterium tumefaciens)介导，以叶圆片为转化材料，转化普通烟草，并获得了转基因植株．经卡那霉素抗性选择、PCR检测目的基因证明．AIMV RNA：3′端基因已整合到转基因烟草的基因组DNA中．转基因植物的攻毒试验表明转基因植株对苜蓿花叶病毒产生高水平的抗性．     

不同取代度的甲壳素磷酸酯钾对番茄种子萌发的作用

用甲壳素合成1^#～7^#甲壳素磷酸酯和甲壳素磷酸酯钾，分别测定1^#～7^#甲壳素磷酸酯的取代度、将甲壳素磷酸酯钾配成O．5mg／L，2mg／L，5mg／L．10mg／L，20mg／L溶液，以蒸馏水为对照，进行番茄(Lycopeysicon esculentum)种子的浸种发芽实验。浸种46．5～76．5h；培养温度29．5C；每只培养皿50粒，每种浓度重复3次。结果表明：6^#、7^#甲壳素磷酸酯钾对番茄种子不具有促进作用；而1^#～5^#甲壳素磷酸酯钾对番茄种子有不同程度的促进作用，其质量浓度以0．5mg/OL～20mg／L为最佳，其中1^#、2^#、3^#、4^#、5^#甲壳素磷酸酯钾对番茄种子的发芽率分别比对照组增长6．7％、17．4％、16．7％、6．0％、16．0％。     

鸡蛋花愈伤组织诱导和植株再生的研究

对以鸡蛋花叶片作为外植体进行愈伤组织诱导和植株再生研究，发现MS NAA0．1mg／L 6-BA 1mg／L对愈伤诱导效果最好，出愈率达96％；愈伤组织分化为芽时，MS NAA0．1mg／L 6-BA 2mg／L效果最好，分化率达98％．生根培养基为1／2MS NAA0．1mg／L．     

红甜菜变异植株无性系建立的研究

以红甜菜变异植株的嫩茎为外植体成功获得再生植株，并建立快速无性繁殖系．嫩茎愈伤组织的诱导及不定芽分化的理想培养基是MS＋BA 1mg／L；不定芽的增殖生长理想培养基为MS＋BA0．1mg／L＋IAA0～0．5mg／L，理想的移栽基质是炉碳渣和河沙．     

结缕草的组织培养

以辽宁产结缕草种胚为材料，在MS＋100mg／L肌醇＋0．4mg／L VB1 1．0mg／L 2，4—D＋30g／L蔗糖＋0．8％琼脂培养基上暗培养，产生愈伤组织，诱导率为85％．愈伤组织经多次继代培养后可保持分化潜力．光照培养后分化出丛生状叶片，并在培养基MS＋100mg／L肌醇＋0．4mg／L VB1＋30g／L蔗糖＋0．8％琼脂上大量生根，形成再生植株，再生率为80％．平均每个种胚可产生20—30个小植株，再生周期为80d左右。     

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…     

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     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

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.     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.