量热法测定氯化镱与甘氨酸配合物的标准生成焓

应用具恒温环境的反应热量计 ,分别测定了 [Yb Cl3· 6H2 O(s) +3 Gly(s) (Gly代表甘氨酸 ) ]和配合物 Yb(Gly) 3Cl3· 3 H2 O(s)在 2 mol· L- 1 HCl溶液中的溶解焓 .通过盖斯定律所设计的一个热化学循环 ,可计算得到六水氯化镱与甘氨酸配位反应的反应焓Δr Hmθ(2 98.1 5 K) =1 .0 73 k J· mol- 1 ,并估算出配合物 Yb(Gly) 3Cl3· 3 H2 O的标准生成焓Δf Hmθ(2 98.1 5 K) =-3 5 99.1 3 k J· mol- 1 .     

TB-偶氮胂双波长分光光度法同时测定锶、钡

研究了TB -偶氮胂与锶、钡的显色反应 ,实验结果表明 ,该络合反应在pH 0 .2～ 2 .5酸度范围内具有较好的灵敏度 (εSr =4 .5× 1 0 4L·mol- 1 ·cm- 1 和εBa =4 .3× 1 0 4L·mol- 1 ·cm- 1 ) ,反应酸度范围宽 (pH 0 .2～2 .5 )且两者最大吸收波长具有明显差异 ,可用双波长分光光度法同时测定Sr2 +、Ba2 +.该方法用于某些纯试剂中Sr、Ba的同时测定 ,结果满意     

中华绒螯蟹亲蟹的标准代谢研究

对中华绒螯蟹亲蟹的耗氧率、二氧化碳排出率及氨氮排泄率进行了测定 ,并研究了亲蟹的能耗率及能源物质的供能比。结果表明 ,体重为 (5 6 .99± 6 .4 2 )g亲蟹 ,在水温 (2 0± 0 .5 )℃时的耗氧率为 (0 .2 77± 0 .0 5 9)mg·g- 1·h- 1,CO2 排出率为 (0 .32 1± 0 .0 78)mg·g- 1·h- 1,氨氮排泄率为(2 .790± 0 .6 43) μg·g- 1·h- 1,能耗率为 (4.2 4± 0 .92 )J·g- 1·h- 1;亲蟹代谢中蛋白质、碳水化合物和脂肪提供的能量比为 7.4∶4 1.2∶5 1.4 ;其能耗率 (R0 )与体重 (W )呈负相关 ,其关系式为R0 =1.76 32W- 0 .54 0 7。     

催化动力学光度法测定痕量铁

在硫酸介质中 ,Fe(Ⅲ )离子在活化剂邻二氮菲的存在下可催化抗坏血酸还原 (2 .6_二溴_4_硝基苯 )_3_(4_硝基苯 )三氮烯的褪色反应 ,据此提出了测定痕量铁的新方法 ,该方法的线性范围为 0～ 33μg/ 2 5mL ,检测限为 6 .9× 10 -3 μg·mL-1,将本法用于人发与自来水中铁的测定 ,结果满意 .     

分光光度法测定Fe(Ⅲ)-二甲酚橙显色反应的研究

在 5× 10 -2 mol·L-1HCl溶液中 ,二甲酚橙与Fe(Ⅲ )生成紫红色络合物 ,其最大吸收波长位于5 6 0nm处 ,表观摩尔吸光系数ε =2 .0× 10 4L·mol-1·cm-1.Fe(Ⅲ )含量在 0～ 2 .4mg·L-1范围内符合Beer定律 .用于水样中微量铁 (Ⅲ )的测定 ,结果较满意     

高灵敏分光光度法测定微量铌

基于铌钼杂多酸与丁基罗丹明B(BRB)和聚乙烯醇(PVA)可以形成稳定的离子缔合物,建立了在水相中直接测定微量铌的新方法.研究了缔合物的形成条件,方法的灵敏度高,其ε值为 7.5×10~5L·mol~(-1)·cm~(-1),已成功地应用于钢中铌的测定.     

二苯硫腙还原法测定痕量 NO_2~-

NO_2~-在2MHCl 介质中能氧化二苯硫腙,使四氯化碳相中绿色减退。通过测定620nm 下反应前后四氯化碳中吸光度的改变,建立了测定痕量 NO_2~-的新方法。方法的灵敏度ε=3. 45×10~4升·摩尔~(-1) ·厘米~(-1) ,最低检出限为5. 0×10~(-8) gNO_2~-·ml~(-1) ,线性范围为0. 50-7. 5μg·NO_2~-·10ml~(-1) 。对干扰的金属离子 Cu~+、Cu~(+2) 、Hg~(2+)、Ag~+、Au~(3+)等,可在 pH3-7条件下,用二苯硫腙的四氯化碳溶液萃取除去。该法用于测定废水中 NO_2~-,结果是满意的。     

铅、镉-卟啉配合物的研究及其分析应用

研究了卟啉与铅、镉的反应及其相应配合物的电子吸收光谱。并结合巯基棉富集分离方法 ,将该具有特定光学性质的分析体系成功地应用于中药中痕量铅、镉的测定 .方法简便 ,测定体系抗干扰的效果好 ,灵敏度高 .对Pb(Ⅱ )、Cd(Ⅱ )的摩尔吸光系数分别为 2 .5× 10 5L·mol- 1·cm- 1和 5 .1× 10 5L·mol- 1·cm- 1.实际样品测定的RSD在 3.3%～ 13.0 %之间 .样品加标回收率在 85 %～ 110 %之间     

《东南大学学报》(自然科学版)作者索引

姓名(期号·页码)H.W.Reinhardt(4·593)JoseI ragorry(1·149,1·154)M.Krueger(4·593)P.Haigron(4·607)Yong X.Tao(1·149,1·154)安琳(6·940)白琴(2·261)鲍旭东(3·475)蔡鹤皋(2·243)蔡辉(1·69)蔡健(4·563)曹鹏飞(4·598)曹文奎(2·253)常娟(4·654)陈传敏(5·738)陈锋(2·257)陈华友(2·311)陈加猛(4·563)陈娟(4·624)陈坤(1·60)陈(2·171)陈南(6·889,6·894)陈强(1·11)陈晴(6·984)陈森发(5·824)陈淑燕(4·637)陈曦(5·729)陈晓平(1·122,1·135,1·241·95)陈学武(5·815)陈亚平(1·90)陈益新(6·833)陈玉泉(5·77…     

非离子表面活性剂Tween-80存在下5-Br-PADAP分光光度法同时测定微量Cu(Ⅲ)和Fe(Ⅲ)

:在 p H3 .50酸性介质中 ,Cu( )和 Fe( )在非离子表面活性剂 Tween-80存在下与 5-Br-PADAP生成有色配合物 .有色配合物最大吸收波长都位于 570 nm处 ;表观摩尔吸光系数分别为 7.96× 1 0 4 L· mol-1· cm-1和 6.3 0× 1 0 4 L· mol-1· cm-1;Cu( )在 0～ 1 3μg/2 5ml,Fe( )在 0～ 1 8μg/2 5ml范围内符合比耳定律 .用拟定的方法测定了铝片和水样中的 Cu( )和 Fe( ) ,结果令人满意     

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.