五肽胃泌素与金属离子作用的荧光光谱研究

通过荧光猝灭法研究了Ｃｕ￣（２＋）、Ｍｎ￣（２＋）、Ｎｉ￣（２＋）、Ｃｏ￣（２＋）与五肽胃泌素的结合。结果表明，这些离子可与五肽胃泌素形成１：１的络合物，成络过程中的荧光猝灭为静态猝灭。讨论了光谱重迭积分对能量转移的影响。     

吡唑－3，5－二羧酸稀土配合物的合成及表征

报道８种稀土－吡唑－３，５－二羧酸（Ｐ２ｏＡ）配合物的合成，通过元素分析、红外、紫光光谱、差热对配合物的结构进行了表征。配合物的通式为：Ｌｎ＿２Ｌ＿３·ｕＨ＿２Ｏ（Ｌｎ￣（３＋）＝Ｌａ￣（３＋）、Ｐｒ￣（３＋）、Ｎｄ￣（３＋）、Ｓｍ￣（３＋）、Ｅｕ￣（３＋）、Ｔｂ￣（３＋）、Ｈｏ￣（３＋）、Ｙ￣（３＋）；Ｌ￣（２－）＝Ｐ２ＤＡ￣（２－）；ｎ＝６～１１）。     

掺杂金属离子对α－FeOOH的形态调节作用

采用ＴＥＭ、ＨＲＥＭ、ＤＴＡ和ＸＲＤ等表征方法，研究了掺杂Ｎｉ￣（２＋）、Ｃｒ￣（３＋）、Ｌａ￣（３＋）和Ｃｅ￣（３＋）四种金属阳离子对α－ＦｅＯＯＨ粒子形态的影响及其作用机制。结果表明，掺杂Ｎｉ￣（２＋）和Ｃｒ￣（３＋）可明显提高α－ＦｅＯＯＨ粒子的轴比，而掺杂Ｌａ￣（３＋）和Ｃｅ￣（３＋）则不能；Ｎｉ￣（２＋）、Ｌａ￣（３＋）和Ｃｅ￣（３＋）亦可抑制ａ－ＦｅＯＯＨ枝叉的形成。研究发现，杂质离子改变了铁黄表面和本体结构，且提高铁黄粒子轴比的作用源于其抑制α－ＦｅＯＯＨ短轴方向（１２０）晶面的生长速率。     

甲基苯胺树脂浮选石英时金属离子的抑制作用及其消除

研究了新型聚合物表面活性剂甲基苯胺树脂对石英矿物的浮选行为与机理；讨论了Ｃａ￣（２＋），Ｆｅ￣（３＋）对浮选的影响及其消除；应用溶液化学计算和表面ζ电位测定，阐明了Ｆｅ￣（３＋）对石英浮选的抑制作用机理和草酸的去Ｆｅ￣（３＋）活化作用机理．     

异价离子替位对PZN—PT系铁电陶瓷结构稳定性的影响

本文详细研究了异价离子（Ｋ￣＋，Ｌａ￣（３＋））替位对ＰＺＮ－ＰＴ系铁电陶瓷结构稳定性的影响，结果表明，Ｋ￣＋离子的引入有利于钙钛矿结构的稳定，而Ｌａ￣（３＋）离子的引入不利于钙钛矿结构的稳定。     

激光光散射及荧光光谱法研究金属离子对牛磺胆酸钠胶团性质的影响

采用激光光散射的方法，研究了Ｃａ￣（２＋）、Ｌａ￣（３＋）、Ｅｕ￣（３＋）存在下，ＮａＴＣ胶团及其与胆固醇、卵磷脂形成的混合胶团平均流体力学半径变化，发现金属离子能使胶团长大，并对胶团的结构及对胆固醇的增溶性有影响。以芘为荧光探针，研究了Ｃａ￣（２＋）、Ｌａ￣（３＋）离子对胶团内部微极性的影响，及通过Ｅｕ￣（３＋）的荧光光谱表征其配位场特征，证明金属离子与胆盐胶团间相互作用发生在胶团的表面。     

一个连续勾股数的构造定理

如果（ｎ＋１）￣２＋（ｎ＋２）￣２＋…＋（ｎ＋ｋ）￣２＝（ｎ＋ｋ＋１）￣２＋（ｎ＋ｋ＋２）￣２＋…＋（ｎ＋２ｋ－ｍ）￣２，则称ｎ＋１，ｎ＋２，…，ｎ十ｋ，ｎ＋ｋ＋１，…，ｎ＋２ｋ－ｍ为一组ｍ类连续勾股数．给出了寻找ｍ类连续勾股数的一种方法．并由此得到了下列结果：１．ｍ＝１时，连续勾股数只有已知的唯一形式（ｎ＝１，２，３，…）：（２ｎ￣２＋ｎ）￣２＋（２ｎ￣２＋ｎ＋１）￣２＋…＋（２ｎ￣２＋２ｎ）￣２＝（２ｎ￣２＋２ｎ＋１）￣２＋…＋（２ｎ￣２＋３ｎ）￣２２．下列的ｍ类连续勾股数不存在：ｍ≡３（ｍｏｄ８），ｍ≡４（ｍｏｄ８），ｍ≡５（ｍｏｄ８）．３．当２≤ｍ≤１００时，只有６组ｍ类连续勾股数．还给出了一个连续勾股数的构造定理，由此可导出一系列ｋ＝ｔｍ型的连续勾股数．     

RE（BenA）4Rh6G三元配合物的合成及其发光

研究了ＲＥ（ＢｅｎＡ）_１Ｒｈ６Ｇ三元配合物的最佳合成条件，（ＲＥ＝Ｅｕ￣（３＋）或Ｔｂ￣（３＋），ＢｅｎＡ：苯甲酸，Ｒｈ６Ｇ：Ｒｈｏｄａｍｉｎｅ６Ｇ）．确定了它们的化学组成为ＲＥ￣（３＋）：ＢｅｎＡ：Ｒｈ６Ｇ＝１：４：１．用ＤＴＡ和ＴＧ测定了它们的热分解行为，用ＩＲ光谱确认了ＲＥ￣（３＋）与ＢｅｎＡ配体间形成配位键。ＵＶ吸收光谱和电导法测定结果表明，Ｅｕ￣（３＋）和Ｔｂ￣（３＋）两种配合物为１：１型离子缔合物。与相同条件下合成的Ｌａ￣（３＋），Ｙ￣（３＋）三元配合物一样，在３６５ｎｍ光激发下，它们的有机溶液均可观察到强烈的荧光，测得Ｅｕ￣（３＋）和Ｔｂ￣（３＋）的固态三元配合物荧光光谱，其最大发射峰分别为６３５和６１３ｎｍ．根据固体荧光光谱结果，看不到稀土金属离子对立的贡献。由此看来，在这两种含不同稀土元素的固体三元配合物体系中，显示为ｌ￣＊→Ｌ发光特征。     

三价稀土（Eu,Tb）离子在对碘苯甲酸钡中的发光

二价钴、镍、锰等过渡金属离子对碘苯甲酸化合物的红外和紫外光谱、磁性、Ｘ射线分析以及热谱性质已有较详细的报道￣［１～４］，但有关对碘苯甲酸稀土化合物的研究尚未见诸于文献。本文合成了三价铕和铽的对碘苯甲酸化合物以及Ｅｕ￣（３＋）和Ｔｂ￣（３＋）掺杂的对碘苯甲酸钡系列固体荧光样品，测量了它们的荧光激发和发射光谱，研究了Ｅｕ￣（３＋）和Ｔｂ￣（３＋）离子含量与样品发光强度的关系。     

绿茶对Pb^2＋和Cu^2＋及Fe^3＋吸附性能的研究

讨论了经甲醛处理的绿茶对水中的Ｐｂ￣（２＋）和Ｃｕ￣（２＋）及Ｆｅ￣（３＋）的吸附性能，采用示波极谱和原子吸收分光光度法为测试手段，测得Ｐｂ￣（２＋）、Ｃｕ￣（２＋）和Ｆｅ￣（３＋）的吸附率平均值分别为８３．７２％、８３．５６％和８１．８９％。还考察了绿茶用量、金属离子浓度及ｐＨ值等因素对吸附率的影响．并对绿茶吸附全属离子的机理进行了探讨     

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).     

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.