基于微机的二次微分示波计时电位法测定甘草酸含量

本文报道测定甘草酸的二次微分示波计时电位法，并用计算机与示波分析仪联机进行数据采集和处理．甘草酸在PH＝4．30～4．80HAC—NaAc缓冲溶液中有较好的示波图形，峰电位E1／2＝－1．40V，甘草酸浓度在1．0×10-5～8．0×10－5mol／L之间二次微分振幅与其浓度成线性关系，检测限8．0×0－6mol／L．此法快速、准确，应用于药物甘草甜素片中甘草酸含量的测定，结果令人满意．     

用RP-HPLC法同时测定甘草中的甘草酸和甘草次酸

建立了以RP-HPLC法同时测定甘草中的甘草酸和甘草次酸的方法．采用ODS色谱柱,甲醇-乙酸(φ=3．6％)水溶液为流动相(梯度洗脱),流速为0．8mL／min,检测波长为254nm,柱温为室温．测得甘草酸的线性范围为0．20～1．00g／L,平均回收率为91.2％,RSD=1．28％;甘草次酸的线性范围为0．0022～0．0110g／L,平均回收率为97．5％,RSD=2．20％．该实验为甘草综合品质的评价提供了一种新方法．     

自由溶液毛细管电泳结合内标法分离测定甘草中的甘草次酸和甘草酸

以双氯芬酸钠为内标,建立了一种快速、灵敏、准确的分离和测定甘草中甘草次酸和甘草酸的自由溶液毛细管电泳新方法．背景电解质是10mmol／L硼砂（pH8．8）,分离在5min内完成．实验证明,所建立的内标法能提高自由溶液毛细管电泳的精密度和定量的准确性．该方法有良好的线性,甘草次酸和甘草酸线性方程的相关系数分别为0．9996和0．9991．甘草次酸和甘草酸的回收率范围分别为95．6％-100．9％和96．8％-102．9％．该方法被成功地运用于测定甘草根的最佳浸泡和煎煮时间．     

用端视ICP-AES法测定生活水中的多种微量元素

采用端视ICP光谱法测定水中的微量元素。选择了仪器工作条件：功率在950W时测定Ag、Al，在1150W时测定Cu、Cd、Pb、Zn、Fe、Mn、Al、Cr，雾化压力为0．14Pa，进样量在1．2～1．8ml／min。分析线为Cu324．7nm、Cd228．8nm、Pb220．3nm、Fe259．9nm、Zn213．8m、Mn257．6nm、Cr205．5nm、Ag328．0nm、Al396．1nm，测定了各元素的检出限，结果为铜、铅、锌、镉、铁、银、铬、铝、锰的测定下限分别为(μg/l)：2．0、10．0、1．0、2．0、2．5、15．0、3．0、25．0、1．5；测得加标回收试验回收率为94％～101％；样品测定的相对标准偏差为0．67％～3．42％；水中常见元素对各元素测定的干扰可以不计；测定了涪江原水、出厂水、管网水等样品。     

小波变换二次微分示波计时电位法测定甘草酸

用本实验室提出的小波变换二次微分示波计时电位法新方法测定甘草酸的含量，有效地去除了信号的噪音，在２．０×１０－５～１．３×１０－４ｍｏｌ／Ｌ范围内，甘草酸浓度与其二次微分的峰高有良好的线性关系，相关系数Ｒ为０．９９９，标准偏差Ｓ为４．４８×１０－３（ｎ＝１０），用于甘草甜素片样品的测定，平均回收率为９９．９１％（ｎ＝６）。     

碱性染料离子选择电极的制备及对部分阴离子的电位滴定

目的：制备碱性染料离子选择电极．方法：以碱性染料苦酮酸盐为电活性物质，氯苯作溶剂，PVC为隋性支持体．结果：制备了16种碱性染料PVC液态膜离子选择电极．测试并比较了它们的性能，用其中结晶紫电极作指示电极，结晶紫溶液为滴定剂，电位滴定了五种阴离子，均得到良好的曲线．结论：测定了洗衣废水样品中痕量阴离子洗济剂，其精度为0．67％～2．7％，回收率在98％～100．5％之间．检测下限5毫克／升．     

La0．67Ca0．33MnO3／YBa2Cu4O8／La0．67Ca0．33MnO3三效应研究层膜的时间

报导了La0．67Ca0．33MnO3／YBa2Cu4O8／La0．67Ca0．33MnO3薄膜中超导特性的时间效应。样品在空气中存放11个月后，超导转变温度都降低，而且每个系列样品的临界厚度增加。对用La0．67Ca0．33MnO3作保护层的YBa2Cu4O8薄膜进行时间效应测量，结果表明当La0．67Ca0．33MnO3层的厚度大于40nm时可以防止水对YBa2Cu4O8薄膜的影响。     

久治县二00四年家畜布病血检报告

应用试管凝聚集反应方法对久治县五乡(镇)／家畜布病进行疫情监测，结果表明：牛检出阳性血样7头，阳性率为0．46％，羊检出阳性一血样2只，阳性率为0．67％。     

流动注射化学发光法快速测定染料木素

基于染料木素对高锰酸钾氧化鲁米诺产生的化学发光的增强作用建立了一种测定染料木素的新方法．在优化的实验条件下，测定染料木素的线性范围为：4．0×10^-2～4．0μg／mL，检出限（3d）为8．0×10^-3g／mL，对浓度为0．50μg／mL的染料木素进行11次平行测定，其相对标准偏差（RSD）为1．2％．将本法用于槐角药丸中染料木素含量的测定，结果令人满意．     

复方甘草酸苷与卤米松软膏联合治疗湿疹疗效观察

目的一观察复方甘草酸苷与卤米松软膏联合应用治疗湿疹的疗效及不良反应。方法实验组予复方甘草酸苷80（160mgl。加入10％葡萄糖液250ml中1次／日,静滴。用0．05％卤米松软膏外擦皮损处早晚各涂一次．对照组口服强的松20mg。2次／日。治疗期间停用其他药物,疗程1—3周,每周随访一次,共观察3周后停药评价疗效．结果实验组有效率为86．0％,对照组为88．0％,二者差异无显著性（P〉0．05）．实验组无不良反应发生,对照组12例出现体重增加。结论一复方甘草酸苷与卤米松软膏联合应用是一种治疗湿疹的确切有效,安全理想的方法。     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-