三唑酮金属配合物的缓释作用

分剐将ZnCl2、CuCl2与三唑酮(1：2)在乙醇溶液中回流反应6h，得到相应的金属配合物，对其进行了元素分析、摩尔电导、红外光谱等表征，并测定了锌(Ⅱ)、铜(Ⅱ)配合物在静态水中的缓释行为。结果显示，在24h后，配合物(Ⅰ)、(Ⅱ)中三唑酮的释放率分别达到92．5％和83．3％。     

新型多孔多胺化交联壳聚糖对镉(Ⅱ)吸附性能的研究

设计和制备了一种新型多孔多胺化壳聚糖 (P-CCTS)，用FTIR和X射线衍射法表征了产物的结构，研究了P-CCTS对镉(Ⅱ)离子的吸附性能，实验结果表明P-CCTS对镉(Ⅱ)离子有很强的吸附能力，在pH为6左右P-CCTS对镉(Ⅱ)离子的吸附能力最强，溶液中适量NaCl的存在能够显著提高P-CCTS对镉(Ⅱ)离子的吸附容量。     

2-巯基吡啶与钴(Ⅱ)、锰(Ⅱ)螯合物的合成及表征

以2—巯基吡啶为配体的钴(Ⅱ)、锰(Ⅱ)二种螯合物．经EDTA络合滴定分析、热重分析、红外光谱分析，确认了螯合物的组成与结构．结果表明：配体2—巯基吡啶是以S，N两原子为配体原子，与Mn(Ⅱ)以2：1、与Co(Ⅱ)以3：1的配比形成中性螯合物。     

蒙脱土担载钴（Ⅱ）—邻菲罗啉金属配合物的制备与表征

本文首次合成了蒙脱土担载钻(Ⅱ)—邻菲罗啉金属配合物，并对其结构进行了IR、XRD、TEM及TG的表征。     

硫酸铵-硫氰酸铵-乙醇体系萃取分离钯(Ⅱ)

研究了硫酸铵存在下，硫氰酸铵—乙醇体系萃取分离钯(Ⅱ)的行为，试验表明，钯(Ⅱ)与SCN^-形成的Pd(SCN)4^2-i很容易被萃取到乙醇相中，当溶液中硫酸铵、硫氰酸铵、无水乙醇浓度分别为0．3g／mL、0.02g／mL、0.30mL／mL，pH=3．0时，能使钯(Ⅱ)的萃取率达到100％，Al(Ⅲ)、Mn(Ⅱ)、Fe(Ⅱ)、U(Ⅵ)、Ni(Ⅱ)、V(Ⅴ)基本不被萃取．实现了钯(Ⅱ)与上述离子的分离。     

4-(2-吡啶偶氮)-邻苯三酚与Zn(Ⅱ)显色反应的分光光度法

研究了新显色剂4-(2-吡啶偶氮)-邻苯三酚(PAPG)与Zn(Ⅱ)的显色反应.在pH=8.6的缓冲溶液中, 该试剂与Zn(Ⅱ)反应生成稳定的蓝色配合物,其最大吸收波长为603 nm,对比度103 nm,表观摩尔吸光系数为3.14×104 L*mol-1*cm-1.Zn(Ⅱ)质量浓度在0.002～1.04 mg/L范围内服从比耳定律.该方法应用于人发中Zn的测定,同时用原子吸收法对照,结果令人满意.     

新体系Mn(Ⅱ)-KIO_4-镁试剂Ⅱ催化动力学光度法测定痕量锰的研究

研究了在Ｎａ２ＨＰＯ４－ＮａＯＨ缓冲溶液中痕量锰催化高碘酸氧化镁试剂Ⅱ〔即４－（４－硝基苯偶氮）－１－萘酚〕使之褪色，并研究了催化动力学条件。建立了一种高灵敏、高选择性测定痕量锰的方法。其测定范围为０．０１～２．５μｇ／２５ｍＬ，检测限为２．６８×１０－１１ｇ／ｍＬ。     

Pb（Ⅱ）-双硫腙-PAR分光光度法测定样品中的铅

研究了Pb(Ⅱ)-双硫腙(H2D2)-PAR三元配合物的显色体系,该体系的最大优点是可在水相中直接用光度法测定样品中铅。Pb(Ⅱ)、双硫腙和PAR形成1:1:1橙红色配合物,最大吸收波长为530 nm,表观摩尔吸光系数ε=2.25×104L·mol-1·cm-1,Ph(Ⅱ)在0-3.0μg·ml-1范围内符合朗伯-比耳定律。以邻二氮菲、NH4SCN、酒石酸钾钠做联合掩蔽剂,可消除常见金属离子的干扰。此方法显色迅速、稳定、操作简便,避免了使用氰化钾剧毒试剂及萃取等繁琐操作。已用于测定自来水、雪水以及人发中铅的含量,结果满意。     

草酰二胺桥联的双核钴（Ⅱ）、镍（Ⅱ）和铜（Ⅱ）配合物的合成与磁性

已合成四种新的草酰二胺桥联的双核钴（Ⅱ）、镍（Ⅱ）和铜（Ⅱ）配合物：Ｃｏ＿２（ｂｐｙ）＿２（ｏｘｄ）（ＣｌＯ＿４）＿２（１），ＣＯ＿２（Ｍｅ＿２－ｂｐｙ）＿２（ｏｘｄ）（ＣｌＯ＿４）＿２·Ｈ＿２Ｏ（２），Ｎｉ＿２（ｂｐｙ）＿２（ｏｘｄ）（ＣｌＯ＿４）＿２·Ｈ＿２Ｏ（３），Ｃｕ＿２（Ｍｅ）＿２－ｂＰｙ）＿２（ｏｘｄ）（ＮＯ＿３）＿２（４），ｂＰｙ表示２，２＇－联吡啶，Ｍｅ＿２－ｂｐｙ表示４，４＇－二甲基联吡啶，ｏｘｄ表示草酰二胺阴离子。经元素分析、ＩＲ、电子光谱、ＥＳＲ、磁化率及变温磁化率的测定，对上述各配合物进行了表征。配合物（１）和（３）的变温磁化率已测定，其数值用最小二乘法和从自旋哈密顿算符导出的磁方程拟合，求得交换积分Ｊ为－１．４８ｃｍ￣（－１）和－１．８２ｃｍ￣（－１），表明配合物中钴（Ⅱ）－钴（Ⅱ）离子及镍（Ⅱ）－镍（Ⅱ）离子之间仅有极弱的反铁磁自旋交换作用。     

壳聚糖对金属离子吸附作用的研究

用非均一法碱处理甲壳素，制得不同脱乙酰度的壳聚糖，研究其对金属离子钴（Ⅱ）、锰（Ⅱ）的吸附性能，同时考察了温度、时间、氨基含量对吸附的影响。结果表明，壳聚糖对Ｃｏ２＋、Ｍｎ２＋有很强的吸附作用和较快的吸附速率，将其作为金属离子的捕集剂具有广阔的应用前景     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has