K-controllability and Approximate K-controllability of Nonlinear Neutral Systems in Banach Spaces

In this paper, K-controllability and approximate K-controllability of non- linear neutral differential equations in Banach spaces are studied. Sufficient conditions are established for each of these types of controllability. The results are obtained by using Leray-Schauder theory.     

STUDY OF HOMOGENEOUS ADSORPTION KINETICS OF CRYSTAL VIOLET

The adsorption kinetica of crystal violet (CV) on silver mirror and two different kinds of silver sols is studied. The adsorption of CV on silver is homogeneous. It is confirmed that the topography of the surface affects only adsorption rate constant, while it does not change heterogeneity parameter. The similar behavior of enhancement factor and adsorption rate constant of CV in the two silver sols is discussed. The adsorption energy of CV and the concentration of adsorbed sites on the surface are estimated by adsorption isotherm. It is found that the enhancement effect on the silver mirror is determined by the concentration of adsorbed sites on surface.     

对氨基苯甲酸分子在银表面多相吸附及氯离子影响的SERS研究

研究对氨基苯甲酸(PABA)在银表面上的吸附动力学过程以及氯离子对其的影响,发现PABA在银表面上呈多相吸附。与匀相吸附的情况相似,表面形态的差异较大地改变吸附速率常数,而对多相因子的影响不明显。氯离子的竞争吸附改变PABA吸附的多相性质,随着氯离子浓度的增加,PABA分子从多相吸附逐渐转变为匀相吸附。根据吸附等温线估算了PABA的吸附能,U≈-9.6kJ/mol。结果分析进一步证实:化学吸附时多相吸附意味着表面上存在非单一的吸附形式。 关键词：