痕量间苯二酚的B-Z振荡反应动力学测定

研究了在封闭体系中B Z振荡反应测定间苯二酚的条件 ,建立了测定痕量间苯二酚的新方法 .当 [KBrO3]=0 2 5mol/L ,[CH2 (COOH) 2 ]=0 5mol/L ,[Ce(SO4 ) 2 ]=0 0 4mol/L ,[H2 SO4 ]=0 8mol/L时 ,间苯二酚在 6 5×10 - 7mol/L～ 1 0× 10 - 5mol/L范围内 ,浓度与振幅改变值ΔA呈线性关系 ,检出限为 6 0× 10 - 7mol/L .用于废水中间苯二酚的测定 ,回收率为 99% .     

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     

KBrO3--KBr紫外分光光度法测定痕量苯酚

研究了HCl溶液中KBrO3-KBr紫外分光光度法测定苯酚的条件.建立了测定痕量苯酚的新方法.结果表明,在0.6 mol/L HCl,4.6×10-5 mol/L KBrO3,5.1×10-4mol/L KBr,5.7×10-4mol/L KI溶液中测定苯酚,其线性范围为0～120 mg/L,表观摩尔吸光系数为4.58×104L@mo1-1@cm-1,Sandell灵敏度为0.001 9μg/cm2.本法用于废水中苯酚的测定,结果满意.     

钛-5′-硝基-水杨基荧光酮-溴化十六烷基三甲胺显色体系的研究及应用

研究了在阳离子表面活性剂溴化十六烷基三甲胺 (CTMAB)存在下 ,5′-硝基 -水杨基荧光酮 (5′-NSF)分光光度法测定钛的最佳显色反应条件 ,发现在 0 .0 1 2～ 0 .0 2 0 mol/L的盐酸介质中 ,钛与试剂形成 1∶ 4的紫色三元配合物 ,最大吸收峰在 5 99nm,表观摩尔吸光系数 ε=1 .3 6× 1 0 5,钛量在 0～ 8μg/2 5 ml范围内符合 Beer定律 ,配合物在 4h内保持稳定 ,显色反应灵敏 ,选择性较高 ,应用于合金钢中微量钛的直接测定 ,取得了满意结果 .     

2-[2-′(5-硝基-吡啶)-偶氮]-变色酸的合成及其与钴(Ⅱ)的显色反应

目的研究新试剂2-[2-′(5-硝基-吡啶)-偶氮]-变色酸(5-NO2-PACA)的合成方法。方法以5-硝基-2-氨基吡啶为原料,经重氮化,再与变色酸偶联合成新试剂,利用试剂与钴在pH=10.00的缓冲介质中的显色反应进行钴(Ⅱ)含量测定。结果得到紫红色晶体,并用元素分析、红外光谱和氢核磁共振谱鉴定了其结构;试剂与钴形成1∶1稳定绿色配合物,λmax=680 nm,ε=8.07×104L/mol.cm,钴的测定线性范围为0~10μg/25 mL。结论该法简单易行,准确可靠,可以用于VB12针剂中钴(Ⅱ)含量的测定。     

2-[2-＇（5-硝基-吡啶）-偶氮]-变色酸的合成及其与钴（Ⅱ）的显色反应

目的 研究新试剂2-[2'-(5-硝基-吡啶)-偶氮]-变色酸(5-NO2-PACA)的合成方法.方法 以5-硝基-2-氨基吡啶为原料,经重氮化,再与变色酸偶联合成新试剂,利用试剂与钴在pH=10.00的缓冲介质中的显色反应进行钴(Ⅱ)含量测定.结果 得到紫红色晶体,并用元素分析、红外光谱和氢核磁共振谱鉴定了其结构;试剂与钴形成11稳定绿色配合物,λmax=680 nm,ε=8.07×104L/mol·cm,钴的测定线性范围为0～10μg/25mL.结论 该法简单易行,准确可靠,可以用于VB12针剂中钴(Ⅱ)含量的测定.     

三种硝基苯酚在玻碳电极上的电化学行为及机理探讨

在0 05mol／LNa2HPO4 0 05mol／LNaH2PO4 0 1mol／LKCl(pH=6 80)分析底液中于玻碳电极上研究了对硝基苯酚、邻硝基苯酚、2,4,6 三硝基苯酚的电化学行为,并对反应机理进行了探讨.     

Ru(phen)_3~(2+)-SO_3~(2-)-Ce(IV)体系化学发光法测定葡萄酒中的亚硫酸盐总量

提出了Ru(phen) 3 2 + -SO3 2 --Ce(IV)体系化学发光法测定溶液中亚硫酸盐的方法 SO3 2 -浓度与化学发光强度在 1 0× 10 -7～ 1 0× 10 -4mol/L范围内成正比 ,检出限为 1 97× 10 -7mol/L(S/N =3) ,1 0× 10 -4mol/LSO3 2 -溶液重复 6次测定结果的相对标准偏差为 4 9% 该方法用于测定白葡萄酒中亚硫酸盐总含量为 4 0 0 6× 10 -5mol/L ,加标回收结果令人满意     

烷基酚聚氧乙烯醚乙酸钠的合成与表面活性研究

用正交实验法系统考查了新型表面活性剂烷基酚聚氧乙烯醚乙酸钠 (TX10 C Na)的合成工艺条件 ,反应最佳工艺条件为 :醚 (烷基酚聚氧乙烯醚TX 1 0 )酸 (一氯乙酸 )投料mol比为 1 :1 .0 5 ,反应温度 85℃ ,反应时间≥ 5h ,催化剂用量 2 .5g/mol,产品收率 >95 % .通过与合成原料TX 1 0比较 ,对TX10 C Na表面活性进行了分析测定 .     

新显色剂NPNTT的合成及其与钴的显色反应

本文报道了1-(4-硝基苯基)-3-(4-硝基-噻唑)-三氮烯(NPNTT)的合成及其与钴的显色反应研究.在Triton X-100的存在下,pH 10.0的Na2B4O7-NaOH缓冲溶液中,该试剂能与铬发生显色反应,钻与NPNTT形成摩尔比为1:5型的配合物,在450nm处有一最大正吸收,在540nm处有一最大负吸收.以460nm为参比波长,540nm为测量波长进行双波长测定,表观摩尔吸光系数为1.25×105L/(mol·cm),钴的浓度在0～320μg/L范围内,符合比尔定律.用拟定方法测定废水中的微量钴,结果满意.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

正~~     

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