硬脂酸/钛酸四丁酯复合改性剂处理掺锑二氧化锡纳米粉体

用硬脂酸／钛酸四丁酯复合改性剂对掺锑二氧化锡（ATO）纳米粉体进行表面有机化改性处理。通过润湿性、分散稳定性测试研究处理温度、分散介质以及钛酸四丁酯与硬脂酸的量比对改性效果的影响。采用热重分析、透射电镜分析、红外光谱分析、X射线光电子能谱等测试方法对改怀后粉体的表面包覆率、形貌、分散状态以及改性机理进行研究。研究结果表明，提高处理温度、适当增加复合改性剂中硬脂酸的量并选用极性弱的有机溶剂可达到比较理想的改性效果；钛酸四丁酯的作用是与粉体粒子表面的羟基以及吸附水反应产生偶联点，如M-O-Ti-OH，这些偶联点易于与羧酸反应；在低温时RCOO^-与偶联点的Ti（Ⅳ）之间以配合物的形式发生作用，在回流温度下处理时，主要发生酯化反应，使硬脂酸更牢固地嫁接到粉体粒子表面，改性效果更好。     

阳极氧化铝模板的结构和性能表征及形成机理

用两步阳极氧化法在0.3 mol.L-1草酸中制备了高度有序、具有纳米级孔洞的阳极氧化铝有序阵列模板.用场发射扫描电镜、X射线衍射及荧光光谱对其进行了结构和性能表征.实验结果表明多孔氧化铝模板的蓝发光带是由氧空位缺陷所引起的.对氧化铝模板的形成机理进行了分析,认为它的形成机理可以通过综合参考溶解模型和机械应力模型加以解释,并且电渗在阳极氧化膜的生长过程中起着重要作用.     

Synthesis of carbon nanotube array using corona discharge plasma-enhanced chemical vapor deposition

A corona discharge phasma-enhanced chemical vapor deposition with the features of atmospheric pressure and low temperature has been developed to synthesize the carbon nanotube array ,The array was synthesized from methane and hydrogen mixture in anodic aluminum oxide template channels in that cobalt was electrodeposited at the bottom.The characterization results by the scanning electron microscopy,transmission electron microscopy,energy dispersive X-ray spectroscopy and Raman spectroscopy indicate that the array consists of carbon nanotubes with the diameter of about 40 nm and the length of more than 4 μm, and the carbon anotubes are mainly restrained within the channels of templates.     

金属锌离子对胆绿素的荧光增强作用

研究了不同条件下Ｚｎ２＋对胆绿素（ｂｉｌｉｖｅｒｄｉｎ,ＢＶ）荧光性质的影响作用。发现在无水乙醇、甲醇、ＮＨ３－ＮＨ４Ｃｌ缓冲体系和ＮａＯＨ水溶液中,Ｚｎ２＋均对ＢＶ有显著的荧光增强作用。在ＮａＯＨ水溶液中,在表面活性剂（ｃｅｔｙｌｔｒｉｍｅｔｈｙｌａｍｍｏｎｉｕｍｂｒｏｍｉｄｅ,ＣＴＡＢ）存在下,Ｚｎ２＋与ＢＶ的摩尔比率为２,荧光增强作用达到最大值。借助这一荧光增强技术,可以在室温下使胆绿素水溶液产生特征强荧光（λｅｘ＝４６５ｎｍ,λｅｍ＝５２５ｎｍ）。     

Layered La-Ba-Cu mixed oxides with perovskite structure as catalyst for NO reduction by CO

The mixed oxides, including LaBa₂Cu₃O₇, LaBaCu₂O₅, La₄BaCu₅O₁₂ with perovskite structure, were prepared. The catalysts were characterized by means of chemical analysis, XRD, H₂-TPR. It was found that their structures were layered ABO₃ perovskite structure and they were the active catalysts for the NO reduction by CO. The existance of Cu³⁺ is an important factor to give the catalysts a high activity for the NO reduction by CO.     

Synthesis of CuO nanometer powder by one step solid state reaction at room temperature

Copper oxide nanometer powder wau synthesized by one step solid state reaction of CuCl₂ · 2H₂O with NaOH at room temperature. The solid product CuO was characterized by X-ray diffraction and a transmission electron microscope. It has been found that the particles of prepared copper oxide are spherical with average diameter of 20 nm. This new method has the advantages of convenience and high yield compared with literature methods.     

Abnormal expression of inducible nitric oxide synthase in Duchenne muscular dystrophy muscles

Duchenne muscular dystrophy (DMD) is a fatal genetic disease for the youth and children. 8 biopsies of DMD patients were determined and demonstrated that the membrane_binding nitric oxide synthase was enriched in normal skeletal muscles and was little in DMD muscles. The results from Western blot and immunohistochemistry showed that inducible nitric oxide synthase (iNOS) was overexpressed in DMD muscle fibers, while a small amount of highly localized iNOS can be found in normal fibers. Based on these findings, it is proposed that the mechanism of progressive injury in DMD muscle might be associated with the abnormal expression of iNOS.     

用锌离子从人尿中分离尿激酶

用低浓度锌离子从人尿中沉淀尿激酶（ＵＫ）,锌离子浓度为３ｍｍｏｌ／Ｌ时,沉淀回收率为８７％～９３％,用ｐＨ１０～１０．５的２０ｇ／Ｌ硫酸铵按１∶４（ｇ∶ｍｌ）溶解ＵＫ沉淀物,ＵＫ溶解得率为９７％。溶解液用７０％饱和度的硫酸铵盐析,ＵＫ盐析收率为９１％,粗品纯度为４．０８×１０５ＩＵ／ｇ,固体效价为３．６×１０４ＩＵ／ｇ,总收率在７７％～８２％之间。每吨尿（５．００×１０６ＩＵ计）可得ＵＫ粗品（３．８～４．１）×１０６ＩＵ。该粗品可用离子交换层析或亲和层析进一步纯化。     

表层掺硅Fe3O4微粒的氧化行为

采用化学分析方法研究了表层掺硅Ｆｅ３Ｏ４微粒的氧化反应动力学。     

化学连续浸提法对土壤中Zn和Mn化学形态的研究

用化学连续浸提法研究不同土壤类型、不同pH值条件下,土壤中Zn和Mn的形态分布,并对方法的精密度和准确度进行系统评价．结果表明,化学连续浸提法精密度小于10％,回收率为94．0％～107．3％．随着土壤pH的变化,土壤中各形态对Zn,Mn呈现有规律变化,土壤类型的变化对Zn的形态分布影响不大,但对Mn的形态分布具有显著影响．