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1.
报导了整合配体N,N,N‘,N’-四(2‘-苯并咪唑甲基)乙二胺(EDTB)-钴(Ⅱ)配合物的合成和红外(IR)、紫外-可见(UV-Vis)光谱、电子自旋共振(ESR)谱表征,据元素分析、摩尔电导和上述光谱数据,与已报导的EDTB含铜(Ⅱ)、锰(0282)配合物X-射线单晶结构比较,推测双核钴(Ⅱ)配合物Co2(EDTB)Cl4.0.5C2H5OH.4.H2O的Co(Ⅱ)离子处于四方锥,而单核钴(  相似文献   

2.
报道了对称的八齿(N6O2型)双核配体N,N,N′,N′-四(2′-苯并咪唑甲基)-1,4-二乙氨基乙二醚(EGTB)及两种含锰(Ⅱ)双核配合物:(Mn2EGTB(OAc)2)(BPh2).3H2O(I),(Mn2EGTB(OAc)Cl)Cl2.2CH3OH.H2O(Ⅱ),对(I),(Ⅱ)进行了^1HNMR,UV-Vis,摩尔电导,中远红外,EST和循环伏安研究,初步推测配合物(I)和(Ⅱ)分别具  相似文献   

3.
报道了对称六齿配体N,N,N’-四(2’-苯并咪唑甲基)乙二胺(EDTB)的两种含镍(Ⅱ)配合物「i(EDTB)」(ClO4)2.3H2O和「Ni(EDTB)」Cl2.2H2O.3C2H5OH的合成、表征及其对尿素水解的影响。根据配合物元素分析、摩尔电导、紫外-可见(UV-Vis)、红外(IR)、ESR谱和循环伏安(CV)等性质与已测X-射线单晶结构的同种配体含铜(Ⅱ)单核配合物比较,推测此两种配  相似文献   

4.
COHERENTOSCILLATORYWAVESFORMULTIDIMENSIONALHYPERBOLICSYSTEMSChenMing1)QiuQingjiu2)(1)DepartmentofRadioEngineering,SoutheastU...  相似文献   

5.
使用合成的钡镁锰矿(TODOROKITE)、碱硬锰矿(HOLLANDITE)型的MnO2及电解MnO2修饰碳膏电极,报告了它们在+1.0V ̄-1.0V电压范围和0.1M KCl溶液中的循环伏安图。Todorokite和hollandite的循环伏安图相似,都没有显明的电流峰。而电解MnO2的循环伏安图中,有两个阳极峰(+0.1V,+0.5VvsSCE)两个阴极峰(0.0V,-0.15V vs SX  相似文献   

6.
合成了过氧磷钨杂多酸盐α2-K7-mHm(P2W17(TαO2)O61).xH2O(M=K,TMA,TEA,TBA)并且极谱-循环伏安,IR,UV吸收光谱,XPS,XRD,^31PNMR,^183WNMR谱进行表征。  相似文献   

7.
THEOPTICALOBSERVATIONOFTHECOLLISTIONSOFCOMETSHOEMAKER-LEVY9WITHJUPITER¥ZhouHongnan(DepartmentofAstronomy,NanjingUniversity,21...  相似文献   

8.
本文论述循环伏安法(CV)中铂(Pt)对乙醇(EtOH)的定量吸附特性,及其对葡萄酒中EtOH测定的应用问题。用自制的Pt梳状工作电极。在0.1M的NaOH溶液中,EtOH的氧化峰电位为-240mV(相对Ag/AgCl参比电极)。以3σ背景值计,检出限为0.023%(V/V)。样品分析结果准确度为95.2-104.7%重现性范围2.8-3.1%RSD(n=8)。校准曲线的线性动态范围0.1-8%(  相似文献   

9.
部分取代苯定量结构-生物降解相关性(QSBR)研究   总被引:1,自引:0,他引:1  
采用Chems3D中量子化学MOPAC-AM1法计算了7种间苯胺类和8地苯酚的分子量高占有轨道能EHOMO、分子最低空轨道能ELUMO。用QSAR程序软件包查得分子体积Vm。结合分子连接性指数(^3X,^3X^v)对生物降解二级速率常数对数lgKb进行定量结构-生物降解相关性(QSBR)分析,通过回归分析,得到如下两个回归方程:lgKb=-0.832-0.118Vm+1.748^3X^v,n=15,R^2=0.832,SE=0.577,F=29.7,p=0.000。(1)lgKb=0.124Vm+1.749^3X^v,n=15,R^2=0.998,SE=0.5591,F=4148.99,p=0.000.(2)  相似文献   

10.
张小红 《甘肃科技》2000,16(3):61-61
MOTOROLAV998+手机的电源及音频处理模块由一块GCAP(U900)完成,EPROMT和EEPROM由一块U701完成,SYN-MDEM(频率合成及调制节调)由一块MAGIC(U913)完成。逻辑控制CPU是WHITECAP(U700)。1介绍各个电压在逻辑控制下的先后产生过程1.1B+电压当EXT-B+供电时,U900的F10脚输出高电平,Q942的S-D截止,B+由EXT—B+产生。当BATT+供电时,F10脚输出低电平,Q942的S-D导通,B+由BATT+产生。CR940为隔离二极管。1.2V-B0…  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
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.  相似文献   

13.
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。  相似文献   

14.
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.  相似文献   

15.
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-  相似文献   

16.
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-  相似文献   

17.
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  相似文献   

18.
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  相似文献   

19.
<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  相似文献   

20.
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