流动注射化学发光法测定芹菜素

在硝酸介质中,罗丹明6G可增强Ce(Ⅳ)氧化芹菜素的微弱化学发光,据此建立了测定芹菜素的化学发光新方法,在优化条件下,该法测定芹菜素的线性范围为5×10-10~2×10-7g/mL,检出限为0.2-ng/mL;相对标准偏差(c=2×10-7g/mL,n=11)为3.0%.将本法用于芹菜提取物中芹菜素的测定,获得满意结果.     

高锰酸钾—鲁米诺化学发光体系测定香草醛

为了拓展流动注射化学发光法在食品检测中的应用,利用草醛能够增敏NaOH介质中高锰酸钾—鲁米诺化学发光体系的发光信号的特点,建立了化学发光测定香草醛的方法。文中考察了介质浓度、发光试剂浓度等因素对发光体系信号的影响,确定了测定香草醛的最佳条件:介质NaOH浓度为0.20 mol/L,高锰酸钾浓度为3.0×10-5mol/L,鲁米诺浓度为7.0×10-5mol/L。在优化实验条件下,体系的发光强度与香草醛浓度在5.0×10-8～3.0×10-6 g/mL内呈线性关系,标准曲线:ΔI=7.188 3×108C(g/mL)+71.767 4(r=0.994 2)。对5.0×10-7g/mL的香草醛平行测定11次,相对偏差为1.3%,其检出限为1.1×10-8g/mL。建立了测定香草醛的流动注射化学发光法新方法,并成功地测定了片剂中香草醛的含量,回收率为98%～104%。     

鲁米诺-Cu(Ⅱ)-盐酸二甲双胍化学发光体系的研究

在Cu(Ⅱ)存在下,研究了luminol-Cu(Ⅱ)-盐酸二甲双胍化学发光体系,建立了测定盐酸二甲双胍的流动注射化学发光新方法.结果表明,在优化的实验条件下,化学发光强度与盐酸二甲双胍浓度在1.0×10-9~1.0×10-7g/mL范围内呈线性关系.该方法测定盐酸二甲双胍的检出限为5×10-10g/mL,相对标准偏差为1.1%(1.0×10-8g/mL盐酸二甲双胍溶液,n=11).该方法已用于片剂中盐酸二甲双胍含量的测定.     

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．     

在线电生Mn(Ⅲ)流动注射电化学发光法测定利血平

设计了一种用于流通体系电解池，将恒电流电解法与流动注射技术相结合，在线定量产生不稳定化学发光试剂Mn(Ⅲ)，使其浓度和反应进度得以在线控制，并基于Mn(Ⅲ)能够氧化利血平产生化学发光，建立了电生Mn(Ⅲ)化学发光法测定利血平的新方法．其线性范围为1.0×10-7～1.0×10-4 g／mL，相对标准偏差为2.3%(c=5.0×10-6 g／mL, n=11)，该方法可用于针剂中利血平含量的测定．     

化学发光测定白藜芦醇

在碱性介质中,鲁米诺与铁氰化钾发生氧化还原反应产生化学发光,加入白藜芦醇后发光强度大大增强,据此建立了一种简单、快速测定白藜芦醇的流动注射化学发光新方法.在优化条件下,该法测定白藜芦醇的线性范围为5·0×10-9~2×10-7g/mL,检出限为3·0×10-9g/mL(以3σ计).对浓度为1·0×10-8g/mL的白藜芦醇进行11次平行测定,其相对标准偏差为3·93%.将本法用于红葡萄酒中白藜芦醇的测定,同时做回收率实验,结果令人满意.     

铈（Ⅳ）-罗丹明6G化学发光体系测定中药清咽片中没食子酸

研究在硫酸-盐酸介质下,没食子酸与铈(Ⅳ)和罗丹明6G体系的化学发光行为,并对影响化学发光强度的诸因素进行试验和探讨,据此建立了流动注射化学发光法检测没食子酸的新方法.检测的线性范围为1.0×10-8～1.0×10-6g/mL;检出限为3.0×10-9g/mL;对浓度为1.0×10-7g/mL没食子酸连续11次测定,其相对标准偏差为2.1%.该方法应用于清咽片中没食子酸含量的测定,结果满意.     

铈(IV)-罗丹明6G化学发光体系测定中药清咽片中没食子酸

研究在硫酸--盐酸介质下,没食子酸与铈(Ⅳ)和罗丹明6G体系的化学发光行为,并对影响化学发光强度的诸因素进行试验和探讨,据此建立了流动注射化学发光法检测没食子酸的新方法.检测的线性范围为1.0×10-8～1.0×10-6g/mL;检出限为3.0×10-9g/mL;对浓度为1.0×10-7g/mL没食子酸连续11次测定,其相对标准偏差为2.1%.该方法应用于清咽片中没食子酸含量的测定,结果满意.     

流动注射化学发光法测定啤酒中的单宁酸

基于在甲醛存在条件下，酸性介质中，高锰酸钾氧化单宁酸产生较强的化学发光反应，结合流动注射技术，建立了单 宁酸的流动注射化学发光测定方法。该法的化学发光强度在单宁酸的浓度为8． 0×10~(-8) ～5． 0×10~(-6) mol/L 范围内呈良好的线 性关系，检出限为5． 0×10~(-8) mol／L(S/N=3) ，测定的相对标准偏差为2． 7％(N=11) 。该法用于测定几种啤酒中微量的单宁酸 测定，结果令人满意。     

KMnO_4-HCHO-EDTA流动注射化学发光法测定左羟丙哌嗪

在酸性介质中,左羟丙哌嗪在高锰酸钾-甲醛体系中产生化学发光,而乙二胺四乙酸的存在可显著增强其发光强度,据此建立了一种简单、快速测定左羟丙哌嗪的化学发光新方法.在实验的优化条件下,化学发光强度与左羟丙哌嗪的浓度在1.0×10-8～5.0×10-6g/mL范围内呈现出良好的线性关系.其检测限(3σ)为3.75×10-9g/mL,对8.0×10-7g/mL的左羟丙哌嗪溶液进行11次平行测定,相对标准偏差为3.03%.将本法应用于合成样品中左羟丙哌嗪的测定,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.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with