铝敏化紫外分光光度法测定氧氟沙星

研究了金属离子对氧氟沙星紫外光谱的影响及反应条件.结果表明,在pH 3.5~4.9的N aA c-HA c缓冲溶液中,铝离子对氧氟沙星吸光度有显著增敏作用.A l-OFLX体系的测定波长mλax=292 nm,线性范围为0.2~38.7μg/mL;回归方程为Y=0.0069 0.09438C(C=μg/mL),r=0.9998;检出限为3.5×10-2μg/mL.据此建立了测定药物制剂中氧氟沙星含量的铝敏化紫外分光光度法.方法灵敏、操作简便,用于药物制剂中氧氟沙星的分析测定,回收率在95%~105%之间,结果令人满意.     

茜素红荷移反应测定多潘立酮

在水溶液和室温下,电子给体多潘立酮与电子受体茜素红发生电荷转移反应形成稳定的1:2荷移配合物.该配合物的λmax=521 nm,在此波长下,溶液吸光度(A)与溶液中多潘立酮浓度(C)成正比关系,表观摩尔吸光系数为7.0×103 L/(mol·cm).据此建立了多潘立酮的分光光度测定法,线性回归方程为A=0.0269C+0.1201,多潘立酮浓度在1.5～200μg/mL范围内与吸光度呈线性关系,相关系数,r=0.9990.方法检出限为0.426 μg/mL.用该方法测定吗丁啉药片样品中的多潘立酮含量,相对标准偏差为0.20%(n=11),结果与药片标示量一致,方法回收率在97%～98%之间.     

利用硼与对甲氨基苯甲酸褪色光度法测定药物和生物样品中的硼

建立了利用对甲氨基苯甲酸测定硼的新方法.研究表明,对甲氨基苯甲酸与硼在pH=10.00发生褪色反应,褪色最大波长λmax=242 nm,硼的浓度在0.22~21.6μg.mL-1范围内与吸光度(A)降低程度呈良好线性关系,线性回归方程为A=-0.035-0.016 C,相关系数r=0.999,检测限为0.18μg.mL-1,回收率为98.7%~101%,该方法能够直接用于药物和生物样品中硼的测定,结果满意.     

铝敏化紫外分光光度法测定培氟沙星

研究了铝离子对培氟沙星(Pefloxac in,PEFX)光谱特性的影响及反应条件,结果表明在pH=4.99的HA c-N aA c缓冲溶液中铝离子对培氟沙星吸光度有显著增敏作用,A l-PEFX络合物的mλax=275 nm,线性范围为8×10-8~1.2×1-0 5g/m l,检出限为8×1-0 8g/m l,对浓度为100μg/m l的培氟沙星进行11次的平行测定,RSD为0.41%.据此建立了测定药物制剂中培氟沙星含量的铝敏化紫外分光光度法.此方法方法灵敏、操作简便,用于合成药物中培氟沙星的分析测定,回收率在95.5%~98.9%之间,结果令人满意.     

用间苯二酚光度法定量测定果葡糖浆中果糖含量及葡萄糖异构酶活性的研究

间苯酚法一般用酮糖和醛糖的定性鉴别。已糖与盐酸共热脱水。生成的羟甲基糖醛与间苯二酚结合成鲜红色化合物。当酮糖基本反应完全时,醛糖仅有千分之几反应。通过间苯二酚用量实验可看出间苯二酚与糖量之比等于1:1时吸光度基本不变。这说明当果糖反应完全后。葡萄糖还很少反应。利用二者的反应速度悬殊,在控制一定反应条件下。可以定量测定果糖。根据上述原理测定了由葡萄糖异构酶产生菌的菌丝体和固定化异构酶所转化的果葡糖浆中果糖含量。并测定了链霉菌发酵液中葡萄糖异构酶的活性。     

分光光度法测定稀土元素含量时数学最优化技术的应用

分光光度法—数学计算相结合测定混合物中单一稀土元素合量是以吸光度具有加和性为依据的。假定混合物是由 L 个组分组成,第 i 成分的消光系数为 Di(λj)(j=1,2……L),λj 为测定点的波长。此时,待测混合物的吸光度 D(λj)与各组分分量 Di(λj)之间有如下关系式:     

二重B-值随机Dirichlet级数收敛性

研究二重B-值随机变量列{Xmm}在某阶矩一致有界条件下的性质,结合有关二重Dirichlet级数的成果,证明在一定条件下,二重B-值随机Dirichlet级数∑ ∞m=1∑ ∞n=1amnXmne-λms-μnta.s.几乎必然与二重Dirichlet级数∑ ∞m=1∑ ∞n=1amne-λms-μnt有相同的成对的相关收敛横坐标.     

海藻多糖片中多糖含量测定

建立了一种测定海藻多糖片中多糖含量的苯酚-硫酸法.以葡萄糖作为标准品,在490nm波长处测定吸光度,在浓度20.16～100.80μg/mL之间线性关系良好(r=0.998 2),平均回收率为99.55%,相对标准偏差(RSD)为0.56%.本方法简单、准确,可用于海藻多糖片中多糖含量的检测.     

二重随机Dirichlet级数所表示的整函数线性增长性

研究了二重随机变量列{Xmn}在某阶矩一致有界条件下的性质，结合二重Dirichlet级数的增长性成果，得出结论：在适当条件下，二重随机Dirichlet级数∑m=1^∞∑n=1^∞amnXmn e^-λm^s-μn^t a.s。与二重Dirichletxe ovt ∑m=1^∞∑n=1^∞amn e^-λm^s-μn^t有相同的线性增长级。     

学习L.R.N.定理的注记

L.R.N.定理设μ,λ是集X上的σ—代数m上的正有界测度,则(a)在m上存在唯一的一对测度λa和λs,使得(1)λ=λa+λs,λa《μ,λs⊥μ这些测度都是正的,且λa⊥λs(b)存在唯一的一个h∈L’(μ),使得     

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)

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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