黑索今粒度分级及球形化

该文报道了一种直接制备不同粒度级别球形化ＲＤＸ的方法，采用溶剂（ＨＮＯ３）非溶剂（Ｈ２Ｏ）沉淀技术，由乌洛托品（ＨＡ）和浓ＨＮＯ３（９８％）硝解氧化反应生成的ＲＤＸ硝酸溶液直接制备不同粒度级别的球形化ＲＤＸ。在实验室中进行了５０ｇ量级的试验，着重了结晶温度、搅拌速度及稀释速度对ＲＤＸ粒度及球形化的影响，由乌洛托品和浓ＨＮＯ３（９８％）反应直接制备了６个级别（Ａ、Ｂ、Ｃ、Ｄ、Ｅ、Ｈ）的球形化ＲＤＸ，     

直接制备超细黑索今的方法

提出一种直接制备超细黑索今的新方法,乌洛托品（HA）和浓硝酸经硝角氧化反应生成黑索今硝酸溶液,然后在0-50℃下用水稀释,通过控制工艺条件结晶制得预期的超细黑索今晶体,在实验室中进行50g量级实验,研究了结晶温度、搅拌速度、硝酸溶液浓度和用量以及稀释水量等工艺条件对超细黑索今晶体粒度的影响。用本法制得了中位径d50为5-10μm的超细黑索今,所得超细黑索今产品酸度小于0.02%。     

萃取石墨炉原子吸收光谱法测定石油中As

研究了石墨炉原子吸收光谱法测定石油中Ａｓ的适宜条件。以ＭＩＢＫ为稀释剂，用Ｉ_２－甲苯－ＨＮＯ_３萃取，以Ｐｄ为基体改进剂，成功地测定了石油中的Ａｓ。方法检出限为７．５μｇ·Ｌ~（－１）（Ｋ＝３），相对标准偏差（Ｓ_ｒ）及回收率（Ｒ）分别为２．８％和９８％～１０２％，Ａｓ的线性范围是１３～２５０μｇ·Ｌ~（－１）。     

钌电极电解还原法制备铀（IV）的研究

研究了在ＵＯ２（ＮＯ３）２－ＨＮＯ３－Ｎ２Ｈ５ＮＯ３体积中，以镀钌钛网为阳极，钛板为阴极电解还原制备铀（Ⅳ）的方法；探讨了电流密度，肼浓度，铀浓度，硝酸浓度以及隔膜等对铀（Ⅵ）电解还原的影响，确定了电解还原制备铀（Ⅳ）最佳的工艺条件；在隔膜电解时，Ｕ（Ⅵ）的还原率可达１００％，而无隔膜电解还原时，Ｕ（Ⅵ）的还原率为６２％。     

六硝基芪合成新方法

研究了以六硝基联苄（ＨＮＢＢ）为中间体，用梯恩梯（ＴＮＴ）为起始原料，分两步合成耐热炸药六硝基Ⅰ型（ＨＮＳ－Ⅰ）或六硝基Ⅱ型（ＨＮＳ－Ⅱ）的新方法。该方法由ＨＮＢＢ可直接合成ＨＮＳ－Ⅱ，由ＴＮＴ制造ＨＮＳ－Ⅰ的，总得率大于６５％，制造ＨＮＳ－Ⅱ总得率大于５９％。文中给出了反应的最佳工艺条件，讨论了溶剂对反应的影响。     

SeSO_3~(2-)-KIO_3极谱催化波法测定鸡蛋中的硒

本文采用ＳｅＳＯ２－３－ＫＩＯ３体系示波极谱催化波法测定了鸡蛋中的硒。试样经ＨＮＯ３－ＨＣｌＯ４混酸消化处理，用浓盐酸还原为Ｓｅ（Ⅳ）后，进行示波导数极谱测定。该方法线性范围为０．０５～２．５０μｇ／Ｌ，回收率９５％，对样品测量的相对标准偏差为４．７６％。     

钌电极电解还原法制备铀(Ⅳ)的研究

研究了在ＵＯ２（ＮＯ３）２－ＨＮＯ３－Ｎ２Ｈ５ＮＯ３体系中,以镀钌钛网为阳极,钛板为阴极电解还原制备铀（Ⅳ）的方法;探讨了电流密度,肼浓度,铀浓度,硝酸浓度以及隔膜等对铀（Ⅵ）电解还原的影响,确定了电解还原制备铀（Ⅳ）最佳的工艺条件;在隔膜电解时,Ｕ（Ⅵ）的还原率可达１００％,而无隔膜电解还原时,Ｕ（Ⅵ）的还原率为６２％．     

黄原脂棉富集-火焰原子吸收法测定米酒中铅

采用ＨＮＯ３－ＨＣｌＯ４消化样品，黄原脂棉富集火焰原子吸收法测定米酒中微量铅，试验表明，ＰＨ为２－７时，黄原脂棉能定量地富集米酒中的铅，以ＨＮＯ３（１＋９９）５ｍｌ，沸水浴１５ｍｉｎ，即可定量解脱，结果令人满意，铅的回收率为９７．９％－１０４．８％，相对标准偏差为５．３％。     

三（8—羟基喹啉）合铝的合成和光物理行为

合成了三（８－羟基喹啉）合铝（Ａｌ（Ｏｘ）３）晶体化合物，产率９３．６％。测定了Ａｌ（Ｏｘ）３的物理化学常数和光物理常数。Ａｌ（Ｏｘ）３在芳烃溶剂中荧光量子效率φｆ较低，在非芳烃溶剂中，φｆ和荧光寿命随溶剂的粘度增加而升高，计算了辐射失活速率常数的非辐射失活速率常数（ｋｎｒ），φｆ的升高与ｋｎｒ降低相关，比较了Ａｌ（Ｏｘ）３在不同相态介质中的荧光行为。     

三（8－羟基喹啉）合铝的合成和光物理行为

合成了三（８－羟基喹啉）合铝（Ａｌ（Ｏｘ）＿３）晶体化合物，产率９３．６％。测定了Ａｌ（Ｏｘ）＿３的物理化学常数和光物理常数，Ａｌ（Ｏｘ）＿３在芳烃溶剂中荧光量子效率较低，在非芳烃溶剂中，和荧光寿命随溶剂的粘度增加而升高。计算了辐射失活速率常数和非辐射失活速率常数的升高与ｋ＿（ｎｒ）降低相关，比较了Ａｌ（Ｏｘ）＿３在不同相态介质中的荧光行为。     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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