库拉索芦荟与木立芦荟抗氧化物质的比较

对库拉索芦荟与木立芦荟叶片组织中超氧化物歧化酶、过氧化物酶、丙二醛、维生素C及可溶性蛋白等理化指标进行了比较研究.结果表明,库拉索芦荟与木立芦荟均具有较强的抗氧化能力.     

库拉索芦荟抑菌效果研究

研究了库拉索芦荟提取液对食品中常见的污染菌:大肠杆菌、青霉、根霉、曲霉、毛霉的抑制作用.研究结果表明:用不同的方法对大肠杆菌做抑菌实验,抑菌效果差别较大.滤纸片法的效果最不明显,而管碟法和实验中的新方法效果很明显;用滤纸片法和管碟法对霉菌做抑菌实验效果不明显,而用平板对峙培养法对霉菌进行抑菌实验效果明显.库拉索芦荟提取液对曲霉、毛霉、青霉都有一定的抑制作用,而对根霉的抑制作用不明显,且芦荟叶皮汁比凝胶汁的抑菌作用强,经高温处理的芦荟汁的抑菌能力无明显变化.     

影响库拉索芦荟（Alos uera L.）愈伤组织诱导的因素

比较了不同培养基对库拉索芦荟愈伤组织的诱导效果，其中B5 6—BA2．0mg／L 2，4—D2．0mg／L Vc5．0mg／L培养基出愈率较高，愈伤组织褐化较轻，探讨了抑制库拉索芦荟愈伤组织褐化的方法。     

库拉索芦荟凝集素凝血活性影响因素研究

采用组织破碎匀浆法处理库拉索芦荟鲜叶,经冷冻离心、盐析、透析和冷冻干燥等方法可得到库拉索芦荟凝集素.经不同类型的细胞凝集反应实验,发现库拉索芦荟凝集素对兔血红细胞能够产生专一性的凝集,对鸭血、鸡血、细菌和霉菌不具有凝集作用;N-乙酰葡萄糖胺对凝血活性具有抑制作用,葡萄糖、乳糖和蔗糖则无抑制效果;改变不同的温度和pH值,发现凝血活性出现最适效应现象,表现出明显的蛋白质特性.     

芦荟多糖对S180小鼠免疫调节因子活性的影响

研究库拉索芦荟多糖对S180小鼠红细胞免疫调节因子活性的影响．采用郭峰法测定．库拉索芦荟多糖可显著提高S180小鼠红细胞G3b受体花环促进率，降低其抑制率，因而从红细胞免疫角度，来揭示芦荟多糖具有抗肿瘤及提高机体免疫的功能．     

超声波法提取库拉索芦荟总黄酮的研究

试验研究了不同种预处理方式,对超声波法提取库拉索芦荟根、茎、叶总黄酮的影响,用分光光度法测定了其总黄酮含量.实验表明,不同种预处理方式对芦荟根、茎、叶总黄酮提取的影响不同：芦荟根乙醇浸泡24h超声提取黄酮的量高于未浸泡直接超声所得黄酮的量;芦荟茎浸泡24h超声得黄酮的量与直接超声得黄酮的量基本相同;叶浸泡24h超声得黄酮的量低于直接超声所得黄酮的量,库拉索芦荟的根、叶中所含黄酮的量远高于茎.     

纳米硅防治三峡库拉索芦荟褐斑病的药效试验

以三峡库区库拉索芦荟褐斑病为研究对象，在实验室内选用6种药剂对其病原菌进行药效实验和大田试验，结果表明：效果最明显的为瑞毒霉，其次为纳米氧化硅．同时，纳米硅以其无公害有营养的优势为芦荟无公害生产提供了可行性．     

纳米硅防治三峡库拉索芦荟褐斑病的药效试验

以三峡库区库拉索芦荟褐斑病为研究对象,在实验室内选用6种药剂对其病原菌进行药效实验和大田试验,结果表明:效果最明显的为瑞毒霉,其次为纳米氧化硅．同时,纳米硅以其无公害有营养的优势为芦荟无公害生产提供了可行性．     

5种药用芦荟中芦荟甙含量的测定

对库拉索芦荟、木立芦荟、好望角芦荟、中华芦荟和皂质芦荟5种药用芦荟中芦荟甙的含量进行了定量的测定,发现全叶干粉中芦荟甙含量差异显著,含量高低依次为：库拉索芦荟、木立芦荟、好望角芦荟、中华芦荟、皂质芦荟;而以鲜质量计算芦荟甙含量,发现库拉索芦荟、木立芦荟和好望角芦荟中芦荟甙含量接近,并大大高于中华芦荟和皂质芦荟中芦荟甙的含量。     

影响库拉索芦荟(Aloe vera L.)愈伤组织诱导的因素

比较了不同培养基对库拉索芦荟愈伤组织的诱导效果,其中B5+6 BA2.0mg/L+2,4 D2.0mg/L+Vc5.0mg/L培养基出愈率较高,愈伤组织褐化较轻.探讨了抑制库拉索芦荟愈伤组织褐化的方法.     

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)

正~~     

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).     

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.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.