表面活性剂用于光度法测定制革废水中的铬

光度分析法测定制革废水中的铬(Ⅲ),在表面活性剂吐温—40的存在下,可使测定的灵敏度大大提高,测定的选择性、抗干扰性和显色稳定性等方面大有改善。废水中铬(Ⅲ)经氧化处理后与二苯氨基脲反应生成紫红色配合物,最大吸收波长λ_(max)为540nm,摩尔吸光系数2.25×10~5L·mol~(-1)·cm~(-1),铬的浓度在0.02～1μg/ml之间符合比耳定律。     

1-(4-硝基苯基)-3-(5-氯吡啶)三氮烯的合成及其与铜的显色反应

报道了 1 - (4-硝基苯基 ) - 3 - (5 -氯吡啶 )三氮烯 (NPCPDT)的合成及其与铜的显色反应 .在OP存在下 ,在pH为 1 1 .0的硼砂 -氢氧化钠缓冲溶液中 ,该试剂能与铜发生显色反应 ,铜与NPCPDT形成摩尔比为 1∶3型的黄色配合物 ,在 4 5 0nm处有一最大正吸收 ,在 5 3 5nm处有一最大负吸收 .以 4 5 0nm为参比波长 ,5 3 5nm为测量波长进行双波长测定 ,表观摩尔吸光系数为 2 .4 2× 1 0 5L·mol-1 ·cm-1 ,铜的浓度在0～ 0 .6 μg/mL范围内符合比尔定律 .用拟定方法测定人发中的微量铜 ,结果满意     

用分光光度法测定空气和水中的甲醇

提出测定裂气和水中甲醇的灵敏的分光光度法。甲醇先氧化成甲醛,然后在酸性介质与铬变酸在曲拉通X-100表面活性剂存在下生成兰紫色配合物。比尔定律适用范围为10～100μg甲醇/10ml。最大吸收波长为574 nm,摩尔吸光系数ε为8.2×10~3L·mol~(-1)·cm~(-1)样品5次测定平均相对误差为+1％～-1.5％。     

乙基曙红分光光度法测定蛋白质

在pH3 5～4 0的NaAc HCl介质中,乙基曙红与蛋白质结合形成复合物,溶液颜色发生变化,最大吸收波长为548nm,比乙基曙红红移了28nm,并在520nm处产生最大褪色,其吸收或褪色作用均可用于蛋白质的分光光度测定.在最大吸收波长548nm处,蛋白质的浓度在0 23～20 0μg·mL-1(HSA)和0 25～17 5μg·mL-1(BSA)范围内与吸光度成正比,其表观摩尔吸光系数分别为1 33×106L·mol-1·cm-1(BSA)和1 26×106L·mol-1·cm-1(HSA);而在最大褪色波长520nm处测量,上述范围的蛋白质浓度也与褪色程度成直线关系,其表观摩尔吸光系数分别为2 02×106L·mol-1·cm-1(BSA)和2 06×106L·mol-1·cm-1(HSA),褪色光度法灵敏度更高.并且方法选择性好,用于尿液及人血清样品中总蛋白的测定,所得结果与考马斯亮蓝法基本一致.     

Meso—四—（3，5—二溴—4—羟基苯）卟啉分光光度法测定废水中铅

利用溴代卟啉试剂T(DBHP)P分光光度法测定废水中的铅。在 0 .16mol/LNaOH介质中 ,铅与溴代卟啉试剂形成 1:2橙黄色配合物 ,最大吸收波长在 4 79nm ,表观摩尔吸光系数为 :2 .2× 10 5L·mol- 1·cm- 1。铅量在 0～ 12 μg/ 2 5ml内符合比耳定律 ,可用于废水中铅的测定 ,获得满意结果     

新试剂乙氧基苯并噻唑重氮氨基硝基苯的合成及与镉的显色反应研究

报道新试剂乙氧基苯并噻唑重氮氨基硝基苯(EtOBTDANB)的合成,并研究了该试剂与镉的显色反应。实验表明,在Triton X—100存在下,pH=10.3—10.8的Na_2B_4O_7—NaOH缓冲体系中,镉与试剂形成1:1的橙黄色络合物,最大吸收位于395nm,而在495nm处络合物与试剂的吸收差值最大,若以395nm为参比波长,495nm为测量波长时,其ε=2.95×1O~5L·mol~(-1)·cm~(-1),镉含量在O-240ug/L范围内符合比耳定律,并对地面水与人发中镉含量进行了测定,结果满意。     

用邻硝基苯基荧光酮和溴化十六烷基三甲基铵分光光度法测定微量铜

在pH为6.3的六次甲基四胺—盐酸介质中,铜(Ⅱ)-O-NPF-CTMAB络合物的最大吸收波长为595nm,摩尔吸光系数值ε为1.25×10~5L·mol~(-1)·cm~(-1).铜浓度在0～7μg/25ml范围内服从比耳定律.用本法测定了铝合金和天然水中微量铜.     

ACBK—CTMAB光度法测定铬(Ⅲ)的方法与探讨

关于微量铬的测定近年来有较多的报道。本文对Cr(Ⅲ)—ACBK—CTMAB体系的显色反应作了研究,拟定了在阳离子表面活性剂十六烷基三甲铵(CTMAB)存在下,酸性铬蓝K(ACBK)光度法测定微量铬的具体条件,该法表观摩尔吸光数可达2.34×10~4mol~(-1)·cm~(-1),络合物最大吸收波长为620nm,线性范围为0～31μg/50ml。     

酸性铬深蓝与蛋白质作用的光度法研究及其分析应用

在酸性介质中,酸性铬深蓝与蛋白质在室温下能迅速结合生成复合物,其最大吸收波长为595nm,比酸性铬深蓝红移了55nm.本文用光度法研究了酸性铬深蓝与牛血清蛋白(BSA)结合反应的最佳条件,并在此基础上建立了一个测定蛋白质的新方法.在最佳反应条件下,BSA的浓度在50~250mg·L-1范围符合比尔定律,吸光系数为2.348mL·mg-1·cm-1.除阴阳离子表面活性剂外,其余大部分物质不干扰蛋白质的测定.方法具有选择性好、快速、稳定的优点.方法应用于牛奶粉、鲜牛奶中蛋白质的测定,结果满意.     

甲苯胺蓝二聚体的吸收光谱及聚合态研究

文章是用环己烷作萃取剂 ,从甲苯胺蓝的阴离子表面活性剂水溶液中将甲苯胺蓝二聚体萃取至有机相 ,在波长为 330～ 80 0nm范围内测定其吸收光谱 ,最大吸收光谱波长为 6 0 5nm .通过测定计算出甲苯胺蓝二聚体的摩尔吸光系数为 5 0 1× 10 3 L·mol-1 ·cm-1 .     

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.     

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.     

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.