Studies on the Recognition Interaction of Rhodamine B and DNA by Voltammetry

Introduction Theinteractionofvariousmoleculessuchas anticancerdrugs,metalcomplexesandorganic dyeswithDNAhasattractedaconsiderableinter- estofsomeresearchersinrecentyears.Theinflu- encesofsmallorganicmoleculesontheDNAstruc- tureandfunctionareofgreatimportanceindrug composition,carcinogenicmechanismandgenemu- tation[1_3].Atpresent,manymethodsandmodels havebeenproposedforthestudyoftheinteraction ofDNAwithsmallmolecules,suchasspectropho- tometry,fluorometry,lightscatteringtechniques andelectro…     

一种考虑拉伸保持效应的多轴疲劳寿命模型

通过定义考虑拉伸保载效应的CFI因子(creep-fatigue interaction factor),将拉伸蠕变损伤和疲劳损伤进行非线性耦合. 根据断裂实验的观察,针对拉伸主 导的裂纹萌生、扩展及破坏的多轴疲劳问题,给出了一个基于临界面方法的能量型高温多轴 疲劳寿命预测模型. 所给出的模型可对不同温度、不同载荷特点、不同保载时间的多轴疲劳 寿命进行预测,模型的材料参数不依赖于温度和载荷. 并且此方法可以很方便地推广到其它 因素主导破坏的高温多轴疲劳寿命预测. 通过拟合高温合金Udimet720Li单轴带保持时间的 低循环疲劳(low cycle fatigue, LCF)寿命试验数据,得到了材料常数. 结合黏 塑性有限元分析方法,对高温双轴带保载循环载荷下Cruciform试件的寿命进行了 预测,预测结果基本落在2倍分散带内,达到工程的要求,证明了该模型的有效性.     

Quantum Information Splitting Based on Current Cavity QED Techniques

We propose two schemes for quantum information splitting via W-class state. The first scheme is based on the interaction of single atom with single-mode field, while the second scheme is based on the simultaneous interaction of two atoms with single-mode cavity. For the first scheme, the difIiculty of two atoms required to be simultaneously sent through one cavity is avoid. For the second scheme, it is immune to thermal field. Both schemes are experimentally feasible based on current cavity QED techniques.     

Teleportation of Unknown Atomic Entangled States Using GHZ Class States

We propose two physical schemes, which can teleport unknown atomic entangled states from user A （Alice） to user B （Bob） via GHZ class states as quantum channel The two schemes are both based on cavity QED techniques. In the two schemes, teleportation and distillation procedures can be realized simultaneously. The second teleportation scheme is more advantageous than the first one.     

Equation of State of the Fluid He-Ne Binary Mixtures at High Pressures and High Temperatures

The fluid variational free energy model is applied to calculate the equation of state (EOS) of the fluid (Ne/3,2He/3) mixtures at 296K. The pair potential is used to describe the He-Ne interaction. The calculated EOSs at 296Kare compared with the experiments for solid Ne(He)2. The validity of the potential and the calculated model is verified by comparison. The present model is extended to calculate the equation of state of the fluid He-Ne mixtures with different He:Ne compositions in the pressure 0-160 GPa and temperature up to 10000 K.     

Voltammetric Determination of Heparin Based on Its Interaction with Brilliant Cresyl Blue

Introduction Heparinisapolysaccharideofglycosaminoglycan class,whichconsistsofrepeatingdisaccharideunitsof iduronic/glucuronicacidandglucosamineresidueswith manybiologicalfunctions[1,2].Manymethodshave beenproposedforthedetectionofheparin,including UV Vis…     

Rheological and DSC Studies on the Interaction between k-Carrageenan and Cellulose Nanocrystals （CNC）

Rheometer and differential scanning calorimetry （DSC） have been used to probe the mechanism of gelation in gels formed by mixture of k-carrageenan and cellulose nanocrystals （CNC）. The results indicated that an association occurred between CNC chains and aggregated k-carrageenan helices.     

Study on Interaction between Chitosan and CdS Quantum Dots via Photoluminescence Spectra

The interaction between CdS quantum dots and amino polysaccharide chitosan in aqueous solution was studied via photoluminescence (PL) spectra.The surface binding of chitosan with different molecular weight (MW) quenched the luminescence of QDs due to the elimination of radioactive anion vacancy centers.This process fits well with the Perrin model;lower MW chitosan exhibits higher quenching efficiency due to better availability to the surface.     

Relationship and Discrepancies Among Typical Interatomic Potential Functions

We develop a simultaneous relationship among parameters of the generalized version of the Lennard-Jones,Morse, Rydberg and Buckingham pair potentials, and the two-body portion of the Kaxiras-Pandey potential function by introducing a set of scaling factors. These potential functions are selected according to their frequent adoption in condensed matter and molecular computation. In addition to verifying the parametric relations,theoretical plots of these potential curves show that each of these potential functions is unique in terms of their characteristic shape. However, gaps between these potential functions are narrowed for interatomic interactions possessing lower separation energy and longer interatomic equilibrium distance. Finally, comparison with the αb initio results shows that the extended-Rydberg potential energy curve gives the best agreement among the five empirical potential functions, for the specific case of hydrogen molecule.