Fe—AI—Mg—MMH／钠质蒙脱土分散体系触变性研究

研究了Fe-AI-Mg型混合金属氢氧化物（简称MMH）／钠质蒙脱土（简称MT）分散体系的触变性,发现在不同MMH／MT质量比（R）条件下,分散体系可呈现正触变性和负触变性。在所研究的R范围（0－0．91）内, 随R增大,体系的触变性发生正触变性－复合触变性－负触变性的转化。考察了高速剪切分散后,测定粘度变化前的列置时间（ts)和测定粘度时的剪切速率（DL)对触变性的影响。探讨了各种触变性产生的原因,提出了“分散粒子－空间连续网络结构－密实聚集体”和“分散粒子－密实聚集体－密产聚集体簇”机理,较合理地解释了观察到的复合触变现象。     

在非离子表面活性剂存在下流动注射催化光度法测定硒（Ⅳ）

利用非离子表面活性剂存在下的胶束催化作用,硒（IV）对Na2S还原培花青（GC）有强催化作用,建立了流动注射催化光度法测定硒（IV）的新方法,本方法的测定范围为0．05－1．00mg/L,检测限为0．01mg/L,11次重复测定的相对标准偏差不大于2．0％,用于硒酵母,猪肾,自来水和金施尔康药片中硒的测定,结果满意。     

原卟啉原IX的构象分析

在合理药物设计方法中 ,当靶标酶的三维结构未知时 ,对其底物进行构象分析 ,特别是确定其活性构象 ,对阐明靶标酶活性中心的空间形状和作用位点具有十分重要的意义。我们曾利用距离比较法确定了原卟啉原氧化酶的底物—原卟啉原IX的活性构象 ,本文从构象分析的角度对 4种不同构象的原卟啉原IX分子与二苯醚类分子的晶体学构象进行了几何参数的比较和分析 ,结果进一步证实了距离比较法所确定的活性构象更为可靠     

STUDY ON THE TREATMENT OF INDUSTRIAL WASTEWATER CONTAINING TRIETHYLAMINE WITH POLYMERIC ADSORBENTS

The treatment of the industrial wastewater,in which the concentration of triethylamine (TEN) and CODcr was around 3450mg/L and 22400mg/L respectively,was studied by adsorption of macroporous resins,Results demonstrate that the polymeric adsorbent CHA-111 has excellent effect on the adsorption and desorption of TEN.The concentration of TEN in the effluent is less than 30mg/L,and the removal efficiency of TEN and total CODcr exceed 99% and 95% respectively.The accumulation and resource reuse of TEN can be realized in this process.     

人造丝厂生产作业优化模型及应用

本给出了人造丝厂生产作业计划整数规划模型,求解方法和应用实例,应用此模型对于满足客户需求,资源有效配置,提高企业效益具有显意义。     

Delayed stage-structured predator-prey model with impulsive perturbations on predator and chemical control on prey

We consider a delayed stage-structured pest management predator-prey system with impulsive transmitting on predator and chemical control on prey.Sufficient conditions of the global attractiveness of the pest-extinction boundary periodic solution and permanence of the system are obtained.We also prove that all solutions of the system are uniformly ultimately bounded.Our results provide reliable tactical basis for practical pest management.     

Hydrodynamic Evolution of Spherical Fireball in Relativistic Heavy Ion Collisions

Evolution process can be calculated from the relativistic hydrodynamic equation with certain estimated initial conditions about a single spherical fireball here.So one can estimate a kind of initial condition qualitatively with a possible energy density about ε0≈1.9 GeV/fm^3,and to fit the experimental data at thermal freeze-out based on this process.The evolution from a cylindrical fireball is discussed simply.     

Controlling Strong Chaos by an Aperiodic Perturbation in Area Preserving Maps

We demonstrate a method for controlling strong chaos by an aperiodic perturbation in two-dimensional Hamiltonian systems.The method has the advantages that the controlled system remains conservative property and the selection of the perturbation has a considerable diversity.We illustrate this method with two area preserving maps:the non-monotonic twist map which is a mixed system and the perturbed cat map which exhibits hard chaos.Numerical results show that the strong chaos can be effectively controlled into regular motions,and the final states are always quasiperiodic ones.The method is robust against the presence of weak external noise.     

负离子配位多面体生长基元与晶体表面结构（Ⅲ）：多型性晶体表面螺旋结构的形成：碳化硅（SiC） 、石墨（C）、云母[KMg3（A1Si3O10）]（OH,F）2,碘化镉（CdI2）、氯化镉（CdCl2）

本文用负离子配位多面体生长基元理论模型讨论了多型性晶体表面螺旋结构的形成,提出在多型性晶体中配位多面体呈层状分布,配位多面体的面为层的边界,上,下层负离子配位多面体不是镜象对称的,在三方晶系和六方晶系的晶体中是沿晶轴a,b错开,上,下两层负离子配位多面体体呈交叉对应,从而达到稳定平衡。晶轴c与负离子配位多面体高次对称轴平行,配位多面体往界面叠合是绕着c轴转动的,其叠加轨迹为螺旋或同心环结构。从多型性晶体螺旋结构的规律性可以看出,晶体生长基元为负离子配位多面体,由于负离子配位多面体的面与呈现螺旋结构的晶面平行,所以生长速度慢,是一个显露面积大的稳态面。螺旋结构只是在该面族上显露。     

Yb：YAl3（BO3）4晶体形貌与生长速度的关系

观察测量了不同生长速度（相应于不同降温速度）自发成核生成的Yb:YAl3(BO3)4晶体形貌。粒试较大（＞2mm)的晶体不管降温速率快慢形态都很简单,只发育六方柱（1120）和菱面体（1011）,粒度较小（＜2mm)的晶体形态随降温速率增快而变复杂,发育一些罕见的高指数晶面,说明在生长速率较快的条件下,在晶体生长早期,一些高能面发育,在晶体生长后期已尖灭了,晶体生长的大部分时间是在低能面（1120）和（1011）上进行的,对比了不同生长条件下晶面的粗糙度,随着降温速度的增快,六方柱面（1120）和菱面体面（1011）由光滑变粗糙,顶面（0001）永远是粗糙的,从晶体结构上定性地探讨了3种晶面的杰克逊因子a及生长机理。