低铁硫酸铝生产新工艺研究

介绍了利用铝灰生产硫酸铝 ,采用共沉法除铁新工艺。确定了最适宜工艺条件 :硫酸质量分数 30 % ,m( H2 SO4 ) ∶m( K2 Mn O4 )∶m A=1∶ 0 .0 0 78∶ 0 .0 0 2 6 ,p H值为 3,收率达93.2 %     

硫酸软骨素快速测定方法的研究

利用硫酸软骨素与氯化十六烷基吡啶结合生成稳定乳浊液 ,建立了硫酸软骨素含量的快速测定方法。在波长 680nm处测定硫酸软骨素在 0～ 6.2 5× 10 - 2 g/L范围内具有良好的线性关系 ,r=0 .9998,方法回收率为 98.4 9% ,RSD为 1.11%。该测定方法与氨基己糖法相比简便快速 ,重现性好     

硫酸铁铵催化合成羧酸环己酯

硫酸铁铵能够代替硫酸用作酯化催化剂。研究了 NH4 Fe(SO4 ) 2 · 1 2 H2 O催化合成乙酸环己酯的反应条件 ,当乙酸、环己醇和硫酸铁铵的摩尔比为 1∶ 0 .44∶ 0 .0 2 ,以环己烷为溶剂 ,回流分水 6 0min,乙酸环己酯收率达 87.2 % ,在相同反应条件下 ,合成了甲酸环己酯 (收率为 6 8.5 % )、丙酸环己酯(收率为 5 9.4% )和丁酸环己酯 (收率为 2 1 .6 % )。     

高效薄层色谱双波长扫描法测定颈复康冲剂中葛根素的含量

在硅胶G高效薄层色谱板上 ,以乙酸乙酯 丙酮 水 甲苯 ( 6 5∶4 5∶1 2∶0 7)为展开剂 ,采取双波长薄层扫描法测定了颈复康冲剂中葛根素的含量 .结果表明 ,葛根素的点样量在 0 2 1 5～ 1 .72 μg范围内呈良好线性关系 ,回归方程为 y =45 6 5 1x 1 3789,r =0 .9998.平均回收率为 99 76 % ,变异系数为 1 34 % .颈复康冲剂中葛根素的含量为 2 0 6 % .     

HPLC示差折光分析法测定口香糖中的木糖醇等多种糖醇的含量

建立了一种测定口香糖中多种糖醇的高效液相色谱法 .样品以去离子水超声提取 ,采用NucleosilNH2 色谱柱(2 5 0mm× 4 6mm ,5 μm) ,流动相为乙腈∶水 =85∶15 ,柱温 5 0℃ ,示差折光检测器检测 .所测口香糖中主要成分木糖醇含量在 2 %～ 37%范围内 ,峰面积与其浓度线性关系良好 (r =0 9995 ) .平均回收率为 10 0 4 % ,RSD =1 16 % (n =5 ) .结果表明 ,该法准确、简便、快速 ,能够同时测定口香糖中多种主要组分 .     

高效薄层色谱测定中成药中苦参碱

建立用高效薄层色谱法测定博性康速溶膜中苦参碱含量的方法。以苯 -丙酮 -乙酸乙酯 -浓氨试液 (2∶3∶4∶0 2 )为展开剂 ,扫描波长λS=480nm ,λR=6 5 0nm。结果显示 :苦参碱进样量 1～ 5 μg范围内呈良好的线性关系 ,r =0 9996 ,平均回收率为 99 4%,RSD =2 0 9%(n =6 )。     

餐厨垃圾高温好氧生物消化工艺控制条件优化

为了探索处理餐厨垃圾的高效生物技术 (目标减量率 80 %～ 90 % ) ,采用高温好氧消化工艺进行了小试规模实验 .实验结果表明 ,控制反应在高温条件下 (5 5～ 6 5℃ )可以达到最大减量率 ,满足高温运行的最佳参数范围 :pH =6 .0～ 6 .8,含水率 =4 5 %～ 5 5 % ,水淬碳氮比 (w(COD) /w(org .N)为 19∶1～ 2 2∶1;运行控制措施为风量和物料投加比 ,泔脚与厨余的投加混合比范围为 2∶1～ 10∶1(干基质量比 ) ;工艺最大处理负荷为 0 .10kg·kg-1·d-1(每日投加量 /反应物料容量     

一种测定工业废水中Hg^2＋的新方法

研究了碱性染料亚甲基蓝 (MB)同 KBr与 Hg2 络合形成的稳定络合物用于分光光度法测定 Hg2 的方法。在柠檬酸 -硫酸缓冲介质 p H=3 .8的条件下 ,络和物的最大吸收波长λmax=6 5 7nm,表观摩尔吸光系数 ε=1 .0 6× 1 0 5L· mol- 1· cm- 1 ,该络和物的组成为 n(Hg2 )∶ n(Br- )∶ n(MB) =1∶ 3∶ 1 ,线形范围为 0 .0 1 8～ 0 .80 0 μg·m L- 1。具有灵敏度高、稳定性好的特点。并对实际水样进行了测定 ,结果可靠。     

高效液相色谱法测定五灵颗粒中芍药苷的含量

对五灵颗粒中芍药苷的含量进行测定 .采用KromacilODSC1 8(2 5 0mm× 4 6mm)为固定相 ,甲醇 水 (2 5∶75 )为流动相 ,检测波长为 2 30nm ,柱温为 2 5℃ .该法的RSD为 1 71 % (n =5 ) ,平均回收率为 1 0 0 0 % .     

反相高效液相色谱法测定三白草中槲皮素和芦丁的含量

采用反相高效液相色谱法 (RP -HPLC)在C1 8色谱柱上以甲醇 :0 .2 %磷酸溶液 (5 0∶5 0 )为流动相测定了三白草中槲皮素和芦丁的含量 .流动相的流速为 1mL min ,检测波长 370nm .结果表明槲皮素在 0 .0 0 8-0 0 84 μg、芦丁在 0 .0 5 4 - 0 .5 4 0 μg范围内呈良好的线性关系 ,相关系数分别为 0 .9988和 0 .9999.槲皮素回收率为 99% ,RSD为 2 .0 % (n =5 ) ,芦丁为 10 6 % ,RSD为 1.4 % (n =5 ) .     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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