污水中微量氨氮的光度测定方法

用苯酚作为显色剂、次氯酸钠作为氧化剂,亚硝基铁氰化钠作为催化剂,使NH3定量生成靛酚,用以测定污水中的微量氨.最大吸收波长λmax=625 nm,最大摩尔吸光系数εmax=1806 L*mol/cm.水样经过碱性预蒸馏,馏出液中加入二乙胺四乙酸(EDTA)后,用酚钠使溶液呈碱性,在催化剂作用下,用次氯酸钠氧化显色30 min后,可直接测定浓度为0.08～20 mg/L的氨(以氮计)样品.测定结果与钠氏试剂光度法基本吻合,该方法可消除石油类等19种物质的干扰.     

一种测定工业废水中Hg^2＋的新方法

研究了碱性染料亚甲基蓝 (MB)同 KBr与 Hg2 络合形成的稳定络合物用于分光光度法测定 Hg2 的方法。在柠檬酸 -硫酸缓冲介质 p H=3 .8的条件下 ,络和物的最大吸收波长λmax=6 5 7nm,表观摩尔吸光系数 ε=1 .0 6× 1 0 5L· mol- 1· cm- 1 ,该络和物的组成为 n(Hg2 )∶ n(Br- )∶ n(MB) =1∶ 3∶ 1 ,线形范围为 0 .0 1 8～ 0 .80 0 μg·m L- 1。具有灵敏度高、稳定性好的特点。并对实际水样进行了测定 ,结果可靠。     

喹啉衍生物甘氨酸乙酯修饰产物的合成及晶体结构测定

报道了新化合物N ,N 二 (8 羟基 5 喹啉甲基 )甘氨酸乙酯的合成方法及对该化合物的晶体结构测定 .结果表明 ,该晶体属于单斜晶系 ,具有P2 1/a空间群 .其晶胞参数 :a =1.0 72 4 (3)nm ,b =1.2 90 4 (3)nm ,c=1.570 4 (7)nm ,β =10 1.96 (3)° ,V =2 .12 6 (2 ) nm3,Z =4 ,Dx=1.30 4Mg·m- 3,μ =0 .0 84 2mm- 1,F(0 0 0 ) =880 ,R =0 .0 6 4 ,Rw=0 .0 6 4 ,S =1.4 55,(Δ/σ) max=0 .0 3,(Δρ) max=2 2 0enm- 3,(Δρ) min=- 2 4 0enm- 3.对该新化合物的红外光谱、核磁共振谱的谱峰进行了归属 .     

靛酚蓝光度法测定蛋白质

提出一种测定蛋白质的新方法 ,样品与硫酸共热 ,蛋白质分解 ,其中的氮转为氨 ,氨由靛酚蓝光度法测定 .本法中有色化合物的最大吸收波长 62 0nm ,表观摩尔吸光系数ε62 0 =1.8× 10 4 mol- 1·L·cm- 1,线性范围 :0～ 0 .6μg/ml氮 ,检出限为 5.8× 10 - 6g/L氮     

用边邻接指数预测链烷烃的热力学性质

用分子图理论和边价 (δei)建构新的连接性指数 (mE) ,籍以描述分子的大小及分支情况 .其中 ,0 E、1 E和碳原子的最大支化度 (δmax)或路径数P3 与 85种链烷烃的标准生成焓 (ΔfHθm)、标准熵 (Sθm)、标准生成自由能 (ΔfGθm)具有良好的相关性 :-ΔfHθm =5 1.12 0 7+2 .0 6 0 2 0 E+38.0 746 1 E+8.5 116δmax,R =0 .9979,Sθm =179.4143+35 .18840 E +2 8.0 3981 E - 1.0 0 3 4δmax,R =0 .9988,ΔfGθm =- 42 .4941+2 .5 330 0 E +9.38131 E +2 .12 5 9P3,R =0 .993 6 .     

3，5，6-三氯吡啶-2-酚的合成与波谱特征

以CuCl Cu作催化剂 ,采用三氯乙酰氯与丙烯腈加成 ,在常压条件下合成了较高收率的 3,5 ,6 三氯吡啶 2 酚 .研究了催化剂种类对合成收率的影响 ,并通过实验确定了合成工艺条件 :M(CuCl Cu) =4 5g·mol- 1 ,M(NB) =1 34g·mol- 1 ,摩尔比n(AN) n(TCAO) =1 2 ,反应时间 1 7h ,反应温度 1 6 0℃ .3,5 ,6 三氯吡啶 2 酚的红外光谱和质谱完全表明了其结构特征     

氧瓶燃烧-孔雀绿-磷钼酸铵-PEG光度法测定蒙诺

为寻找测定福辛普利钠的简便而实用的方法,建立了经氧瓶燃烧后,用孔雀绿-磷钼酸铵-聚乙二醇显色光度法测定蒙诺片剂中福辛普利钠含量的方法.测定线性范围为含磷量在1×1-0 6~5×1-0 6g/50mL,相关系数R=0.999 8.测定片剂中福辛普利钠的含量与标示量比较,相对误差≤±0.8%,相对标准偏差RSD=0.44%(n=7).     

微量铵的分光光度测定

铵的测定常采用甲醛法或蒸馏法．对于微量铵本文报道了用分光光度法测定离子交换工艺过程中微量铵的方法。此方法基于在碱性介质中用次氯酸钠（安替福民）氧化铵苯酚，使之形成蓝色靛酚化和物，其中最大吸收峰位于600nm处。在EDTA存在下，较大量钙、镁、铝、铁等不干扰测定。方法操作简便、快捷。     

利用荷移反应分光光度法测定苯唑西林钠

以丙酮溶液为溶剂,利用苯唑西林钠与对硝基酚发生荷移反应,建立了测定苯唑西林钠含量的一种新方法。苯唑西林钠与对硝基酚发生荷移反应后生成稳定的1∶1络合物,该络合物最大吸收波长为401.4 nm,线性范围10～80μg/mL,表观摩尔吸光系数ε=2.22×103L.mol-1.cm-1。苯唑西林钠回收率(质量分数)在98.35%～100.20%范围内,相对标准偏差≤2.71%。该方法简便、快速,可用于测定药物制剂中苯唑西林钠的含量。     

高效薄层色谱测定中成药中苦参碱

建立用高效薄层色谱法测定博性康速溶膜中苦参碱含量的方法。以苯 -丙酮 -乙酸乙酯 -浓氨试液 (2∶3∶4∶0 2 )为展开剂 ,扫描波长λS=480nm ,λR=6 5 0nm。结果显示 :苦参碱进样量 1～ 5 μg范围内呈良好的线性关系 ,r =0 9996 ,平均回收率为 99 4%,RSD =2 0 9%(n =6 )。     

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.