硫酸锌与L-α-色氨酸配合行为的相化学研究

锌是重要的生命元素 ,L- α-氨基酸是人体蛋白质的基本结构单元。 α-氨基酸锌配合物作为添加剂在药物、食品和化妆品中有广阔的应用前景 [1～ 3 ] 。本文用半微量相平衡方法 [4] 研究了Zn SO4- Try- H2 O体系在 2 5℃的相化学 ,发现该体系中未形成新化合物。合成了未见文献报道的 Zn( Try) 2 固态配合物 ,并研究了它的物理化学性质。1　实验部分1 .1　仪器与试剂恒温槽 (自制 )温度涨落± 0 .0 5℃ ;WZS— 1型阿贝折光仪 (上海实验仪器厂 ) ;ZD— 2型自动电位滴定仪 ;BRUKER EQ UINOX— 550型傅立叶红外分光光度计 ( KBr压片 )…     

Remark on Random Attractors of Stochastic Non-Newtonian Fluid

In this paper, we study the asymptotic behaviors of solution for stochastic non-Newtonian fluid with white noise in two-dimensional domain. In particular, we will prove the existence of random attractors in H.     

Asymptotic behavior of the Eckhoff method for convergence acceleration of trigonometric interpolation

Convergence acceleration of the classical trigonometric interpolation by the Eckhoff method is considered, where the exact values of the jumps are approximated by solution of a system of linear equations. The accuracy of the jump approximation is explored and the corresponding asymptotic error of interpolation is derived. Numerical results validate theoretical estimates.     

抗癌新药氟哌酸基甲硫酰(2-乙酰基苯)腙的伏安法研究

氟哌酸基甲硫酰 (2 乙酰基苯 )腙 (norfloxacinylcarbothioic (2 acetylbenzyl)hydrazone ,简称NCABH)是在缩胺硫脲的结构中引入氟哌酸基合成的一种新抗癌药物。本文采用线性扫描伏安法、循环伏安法和常规脉冲溶出伏安法研究了该药物的电化学行为。实验结果表明 :NCABH在电极表面存在吸附特性 ,在pH =10的 0 .2mol LNa2 B4 O7 NaOH缓冲溶液中 ,该药物在 - 0 .72V(vs .SCE)处有一灵敏的还原峰 ,在选定的最佳条件下 ,浓度在 2 .0× 10 - 7～ 4 .0× 10 - 5mol L与其峰电流有良好的线性关系 ,检测限为 5 .0× 10 - 8mol L ,方法用于模拟尿、血清样品中痕量药物的测定 ,回收率均在 95 %～ 10 2 %之间     

例谈走进新课程的教学误区及对策

自2002年新课程改革进入我校以来,我们全体数学教师紧紧围绕人才培养的目标,边学边教,边教边思,不断改进.在这过程中,教师的教学理念、思维方式、教学行为、教学风格等都在发生着悄然而深刻的变化,出现了许多令人可喜的现象,教研活动深入开展,有价值的研究课不断涌现.     

知情交易者和不知情交易者的策略互动

本文利用EEOW模型结合高频交易数据,对中国股票市场上知情交易者和不知情交易者的交易策略互动进行了实证研究.研究发现:在中国股票市场上,不知情交易者的交易行为对知情交易者没有影响,但是知情交易者的交易行为却对不知情交易者有显著的影响.当预期到市场上有众多知情交易者时,不知情交易者就减少交易以降低与知情交易者发生交易的概率.这一点与传统模型中的"噪声"交易者假设是不一致的.本文的结论对于今后构建更加贴近实际情况的交易策略模型有很好的指导意义.     

The Asymptotic Behavior for Numerical Solution of a Volterra Equation

Long-time asymptotic stability and convergence properties for the numerical solution of a Volterra equation of parabolic type are studied.The methods are based on the first-second order backward difference methods.The memory term is approximated by the comvolution quadrature and the interpolant quadrature.Discretization of the spatial partial differential operators by the finite element method is also considered.     

Asymptotic Behaviors of the Solutions to Scalar Viscous Conservation Laws on Bounded Interval

Abstract This paper concerns the asymptotic behaviors of the solutions to the initial-boundary value prob-lem for scalar viscous conservations laws u_t+f(u)_x=u_(xx) on[0,1],with the boundary condition u(0,t) =u_,u(1,t)=u_+ and the initial data u(x,0)=u_0(x,0)=u_0(x),where u_≠u_+ and f is a given function satisfyingf'(u)>0 for u under consideration.By means of energy estimates method and under some more regular condi-tions on the initial data,both the global existence and the asymptotic behavior are obtained.When u_u_+, which corresponds to shock waves in inviscid conservation laws, it is established for weak shockwaves,which means that │u_-u_+│is small.Moreover,exponential decay rates are both given.