不同色光、温度、pH对草珊瑚愈伤组织的培养效应

报道了草瑚珊愈伤组织生长和次生代谢物与光、温度、ｐＨ不同的物理因子培养条件的关系。结果表明，暗培养的愈伤组织生长和代谢物含量较高，而蓝光在草珊瑚愈伤组织培养中，表现了蓝光效应，诱导出一个优良的愈伤组织系，其相对增长率和总黄酮月产率分别为７５９％，１．８６８ｇ／Ｌ。最佳培养温度为２６℃恒温，最适愈伤组织生长的培养基ｐＨ值为５．５；而最适愈伤组织代谢次级产物的生产培养基ｐＨ值为６．０。     

辣椒（Capsicum annuum L.）下胚轴离体培养的研究

将辣椒无菌苗下胚轴切段接种在ＭＳ培养基（附加不同的植物激素）上，诱导产生愈伤组织。最适的诱导培养基为ＭＳ＋２ｍｇ／Ｌ ＢＡ，０．５ｍｇ／Ｌ ＩＡＡ，在此培养基上产生的愈伤组织具有较强的分化能力。将愈伤组织转移到分化培养基，光照培养，芽分化率可达２５．０％。不定芽在含１ｍｇ／Ｌ ＧＡ３和２ｍｇ／Ｌ ＢＡ的ＭＳ培养基上伸长成苗，再移入生根培养基上诱导生根，长成完整植株。     

不同外植体和激素对银杏愈伤组织诱导和生长的影响

以银杏胚的不同部位子叶、胚芽、胚轴、胚根为外植体,比较不同外源激素和培养条件对银杏愈伤组织诱导和继代培养的影响,结果表明子叶最易诱导愈伤组织,且在暗条件下诱导效果最好,2,4-D和队影响子叶的愈伤诱导能力;以茎段为外植体,发现生长素为茎段愈伤组织诱导所必需,且NAA诱导效果好于2,4-D;以叶片为外植体,发现生长素中的NAA诱导愈伤效果最好,雌雄叶的诱导能力相同.在愈伤组织生长过程中,NAA是子叶和茎段愈伤组织继代培养必需的,BA对茎段愈伤组织生长速.度无显著影响,但可使愈伤组织敛密,并有利于分化.MS 1 mg/LNAA 0.005 mg/LKT(或BA)的培养基对叶片愈伤组织生长最理想,雄叶愈伤生长较快,光照培养促进愈伤组织生长.     

玉米根尖和成熟胚的愈伤组织培养及悬浮系的建立

玉米幼根根尖和成熟胚都以ＭＳ为基本培养基,分别在不同的激素配比、不同浓度的蔗糖和水解乳蛋白（ＬＨ）下,进行愈伤组织的诱导．初始愈伤组织皆为白色、瘤状、透明、外软内硬,易分化成植株的非松脆类型;在不同的继代培养基中经过五代调控培养,初始愈伤组织都能转变为疏松的、小颗粒状、生活力强的松脆的愈伤组织;挑选适量的好的愈伤组织置于不同的液体培养基中,得到分散性好、生长快的悬浮细胞系     

植物生长调节物质对华黄芪愈伤组织诱导、增殖及芽分化的效应

以华黄芪叶片为外植体,在附加不同浓度和比例的２,４－Ｄ与６－ＢＡ的ＭＳ培养基上,探讨植物生长调节物质对华黄芪愈伤组织诱导、增殖及芽分化的效应,并在愈伤组织增殖过程中,初步对愈伤指数与愈伤组织生长量的关系进行了比较,结果表明：在ＭＳ＋２,４－Ｄ０．５ｍｇ／Ｌ＋６－ＢＡ０．３ｍｇ／Ｌ培养基上诱导率最高,且形成愈伤组织时间最短;在ＭＳ＋２,４－Ｄ０ｍｇ／Ｌ＋６－ＢＡ０．３ｍｇ／Ｌ培养基上,芽的分化率最高;愈伤指数与“称重法”测定愈伤组织生长所得结果一致．     

影响红掌品种＂若比诺＂愈伤组织诱导因素分析

以红掌品种“若比诺”的无菌苗为材料,研究了影响红掌品种“若比诺”愈伤组织的诱导因素．结果表明,基本培养基、外源激素、外植体类型和光照培养条件对愈伤组织的诱导都有显著影响．茎段在MS＋BA（2．0mg／L）＋2,4．D（0．2mg／L）培养基中愈伤组织诱导率最高,达到100％,叶片在1／2MS＋BA（2．0mg／L）＋2,4-D（0．2mg/L）培养基中诱导率最低（为0）．不同外植体的愈伤组织诱导率有明显的差异,其诱导率的大小依次为茎段〉叶柄〉叶片,茎段最适合做外植体源．光培养下的愈伤组织诱导率比暗培养下的高,光照有利于“若比诺”的愈伤组织的诱导．     

油菜薄层细胞培养中不同光质对愈伤组织诱导和增殖的效应

本实验以油菜(Brassica napus L.)花序轴薄层细胞为外植体,基本培养基为MS,附加不同浓度和比例的NAA和6-BA组合。接种后,选取白光、植物生长灯、红光、蓝光四种不同光质的光进行光照,以黑暗为对照,置恒温培养柜中培养,探讨不同光质对愈伤组织诱导和增殖的效应。结果表明:在相同或不同的培养基上,不同光质对愈伤组织的诱导效应都不同,蓝光,红光对油菜愈伤组织诱导具有明显的促进作用。在相同培养基中,不同光质处理对愈伤组织的增殖效应也不同,蓝光、红光对愈伤组织增殖的促进作用也是明显的。     

玛丽安万年青的茎尖培养与快速繁殖

以玛丽这万年青（Ｄｉｅｆｆｅｎｂａｃｈｉｓ Ｔｒｏｐｉｃ Ｍａｒｉｎｎｅ）的顶芽或侧芽茎尖作外植体,通过二次表面灭菌,得到茎尖无菌培养物。根据茎尖愈伤组织诱导率和生长速度２项指标,筛选出码丽安万年青茎尖离体培养的培养基。ＭＳ＋ＢＡ４．０ｎｇ／Ｌ的固体培养基适宜于诱导茎尖形成愈伤组织和愈伤组织生长。愈伤组织转入ＭＳ＋ＢＡ２．０ｍｇ／Ｌ的固体培养基分化形成丛生芽,从愈伤组织上切取１ｃｍ以上的牙转入ＭＳ     

组培条件对何首乌愈伤组织诱导及生长的影响

为了寻找适合何首乌愈伤组织诱导与生长的培养条件，本文考察了愈伤组织形成的比率，分析了取样时间、光照条件、培养基中2，4-D、6BA和IBA的浓度对愈伤组织诱导和生长的影响。实验表明，在黑暗中，在添加有1．5mg/L2，4-D，1mg/L 6BA和0．5mg/L BA的MS培养基上，夏季取样的茎段，愈伤组织诱导率可达100％。     

重楼属植物愈伤组织的诱导和培养

以MS培养基为基本培养基，附加不同种类和浓度的生长调节物质，对不同器官，不同取材时期的重楼外植体进行愈伤组织的诱导培养研究．结果表明，BA和IAA有利于愈伤组织的诱导；生长期的幼芽组织是较适宜的培养器官，其愈伤组织的诱导频率达26．7％．该研究为进一步离体快繁完整植株打下了坚实的基础，     

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.