丙烯酸与CMC在60Co辐照下的接枝聚合反应

利用辐射源^60Co辐照引发丙烯酸与羧甲基纤维素（CMC）接枝聚合反应，合成高吸水纤维。研究了羧甲基纤维素与丙烯酸不同酸比、不同辐照剂量对接枝聚合产物性能的影响。结果表明，mCMC:m丙烯酸：m水＝1：1：10，辐照剂量为2000Gy时接枝聚合产物具有较高的吸水量及吸水速度，吸普通自来水可达干重的300倍，吸去离子水可达干重的350倍以上。     

微波辐照下酞菁铜配合物的合成及其磺化反应

在微波辐照条件下，进行了酞菁铜配合物的微波合成研究和浓硫酸作为磺化剂酞菁铜配合物的微波磺化反应研究，获得了常规加热条件下不能制备的水溶性磺化酞菁铜配合物，并由电子光谱和红外光谱进行了表征。该微波磺化反应展示了微波辐照优良的非热效应，可作为水溶性金属酞菁衍生物的一种简便快速制备方法，避免采用发烟硫酸作为磺化试剂的常规加热制备方法所带来的空气污染，本文考察了微波辐照强度、微波作用时间与反应试剂组成用量的影响规律，探讨了微波场对合成反应的化学动力学作用。     

市科技局组织专家对“辐照技术在食品贮藏保鲜上的应用研究”科研项目进行验收

2006年8月30日，合肥市科技局组织有关专家对安徽双丰农业高新技术有限公司和安徽省农科院原子能所共同承担的合肥市重点科研项目“辐照技术在食品贮藏保鲜上的应用研究”进行了验收。该项目以冷冻龙虾仁和草莓为研究对象，进行了辐照食品微生物学效应、辐照对食品营养品质的影响及其辐照贮藏保鲜工艺的研究，研制出了辐照动态保温装置，年支持出口创汇农产品价值达1亿元。     

微波辐照对减压渣油化学组成的影响

用频率为2450MHz的微波对胜利、孤岛减压渣油进行了辐照。辐照时，样品的体温底低于80℃，实验结果表明辐照过程中样品发展了化学变化。减压渣油和正庚烷沥青质的VPO平均相对分子质量都减小了。减压渣油及其正庚烷沥青质的FT－IR中波数为1380cm^-1，1460cm^-1和1600cm^-1的吸收峰的峰高和峰面积都发生了相对变化。对辐照前后的减压渣油进行了六组分分析。结果表明六组分中重组分减少，轻组分增加。最后，分析了减压渣油及沥青质在微波辐照下发生化学变化的作用机理。     

He—Ne激光对小麦RNA及可溶性蛋白合成的影响

采用不同功率密度和辐照时间的He-Ne激光处理小麦萌动种子,研究了其早期的生物学效应,结果显示：一定剂量的He-Ne激光照能促进小麦的萌发,并使其中的可溶性蛋白合成及RNA含量增加,在辐照剂量相同条件下,以不同功率密度与辐照时间进行处理所产生的生物效应不同,其中功率密度的影响辐照时间大,He-Ne激光的最佳辐照功率密度为319mW/cm^2,最佳辐照时间为2min。     

AGB星s-过程核合成:中子辐照量渐近分布

根据13C壳层在脉冲间隔期间辐射燃烧释放中子的AGB星s(slow) 过程核合成模型,采用3层简化假设,研究了氦中间壳层的中子辐照量渐近分布。结果表明,中子辐照量分布不再是通常所认为的指数形式,曲线先有一个简短的上升然后再单调下降,但除中子辐照量较低的一个小区域外,分布曲线仍与指数分布非常接近。这与根据恒星模型进行的核合成计算结果一致。     

微波合成5-(3-羟基-1,3-二苯基烯丙基)麦氏酸

以查尔酮和麦氏酸为原料,经微波辐照合成了5-(3-羟基-1,3-二苯基烯丙基)麦氏酸,合成的最佳条件为DMF做反应介质,n(麦氏酸)∶n(查尔酮)=1.2∶1,微波中火辐照30 min,产物收率为87.6%。目标化合物结构经红外光谱(FT-IR)、核磁共振氢谱(~1H NMR)和核磁共振碳谱(~(13)C NMR)表征确证。     

He-Ne激光对增强UV-B辐射小麦幼苗钙调蛋白的影响

采用5mw·mm-2的He-Ne激光辐照增强UV-B辐射(10.08kJ·m-2·d-1)后的小麦,对小麦叶片中钙调蛋白进行研究.通过葡聚糖凝胶SephdexG-50对小麦钙调蛋白进行纯化,并用SDS-聚丙烯酰胺凝胶电泳对其进行鉴定.结果显示,纯化得到了钙调蛋白,并且He-Ne激光辐照可使UV-B辐射后小麦幼苗叶片中的钙调蛋白含量增加(p0.05).结果表明,一定剂量的He-Ne激光辐照能够促进小麦钙钙调蛋白的合成,且可能在一定程度上修复增强UV-B对小麦幼苗钙信号系统的损伤.     

紫外可见分光光度计快速检测合成、处理钻石

对近几年市场上出现较多的常见HTHP合成钻石、CVD合成钻石、HTHP处理钻石、辐照钻石的紫外可见光光谱进行整理总结、系统分析,从而指导珠宝质检站利用常规的紫外可见分光光度计对其进行快速鉴别。     

微波法制备α-四(4-羧基苯氧基)酞菁锌及其光催化性能

采用微波辐照法合成了α-四（4-羧基苯氧基）酞菁锌（ZnPc）,以UV-Vis,FT-IR等手段对其进行了表征,并以碘量法测定了产物的单线态氧量子产率。结果表明：以2mL N,N二甲基甲酰胺（DMF）为溶剂,0.4mL 1, 8二氮杂二环[5, 4, 0]十一碳-7-烯（DBU）为催化剂,0.1g 3-4-羧基苯氧基邻苯二甲腈及0.03g ZnCl 2,800W微波辐照180s后,可得到产率为75.3%的ZnPc,比传统加热合成产率提高了403%。对1, 3二苯基苯并呋喃（DPBF）光漂白实验表明,所合成的ZnPc具有较高的单线态量子产率、光活性和稳定性。     

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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