The pyrogallol was adhered on the surface of the solid electrode by the direct oxidative electropolymerization to construct the chemical sensors for bi ( iii ) . the sensor exhibits perfect long stability and reproducibility . a low detection was obtained in the determination of bi ( iii ) and this way can be applied to determine the real samples such as human hair and nails 2 、将修饰剂邻苯三酚直接电聚合到固体电极的表面，研制bi ( )离子化学传感器，该修饰电极稳定性和重现性很好，克服了以往碳糊电极机械强度差、重现性不好的缺陷，测定bi ( )达到了很低的检出限，应用于人发和指甲等实际样品的测定。
The electrode was found to decrease the solubility of dithizone in alkalescence solution and effectively minish the lose of deoxidize state of metal . third , a potentiometric sensor was prepared by adding copper diethyldithiocarbamate directly into the carbon paste mixture , and the electrode was found has nerst response to copper ion in solution . and in our research two pharmaceutical selective electrodes were fabricated by coating polyvinyl chloride ( pvc ) which contained electroactive material on carbon rod electrode 第二，利用- cd与环氧氯丙烷形成的交联聚合物（ - cdp ） （不溶性）包合了双硫腙，然后将- cdp与双硫腙包合物树脂作为修饰剂制备了碳糊修饰电极，利用阳极溶出伏安法（ asv ）测定了pd ~ ( 2 + ) ，实验发现通过包合降低了双硫腙在碱性溶液中的溶解度并且减少了金属还原态的流失，取得了较好的效果。
According to the problems in current research , my works have four parts as following : 1 . cds nanoparticles were synthesized by surface - modified with thiourea and stabilized by poly ( n - vinyl - 2 - pyrrolidone ) ( pvp ) . the results showed that cds nanoparticles , which exhibited significantly quantum size effect and enhanced luminescence , were prepared through the surface modified with thiourea 鉴于目前使用苯硫酚修饰对cds纳米粒子的荧光具有强烈的淬灭作用，而硫醇具有较强的毒性，本研究用硫脲作表面修饰剂，以聚乙烯吡咯烷酮( pvp )作稳定剂制备了粒径分布较均匀、性能稳定的cds纳米粒子。
In this thesis , pvc / organoclay nanocomposites were synthesized by in - situ intercalation and melt - blending intercaltion . the structure and properties of the composites were investigated . furthermore , some factors , such as special synthesis method , the different clay surface modifiers and the molecular weight of the polymer matrix which can be affect the intercalation results , were discussed 本文分别通过原位插层法和熔融插层法制备了聚氯乙烯粘土纳米复合材料，通过插层结构和复合材料性能的对比，得出一系列有意义的结论；并研究了粘土表面修饰剂、插层方法以及树脂基体分子量对插层结构的影响。
The purity and composition uniformity were very high , and the specific surface area was 67 - 156 nm . in the third part , surface modification of sn - in2o3 nano particle was studied and some conclusions were drawn finally . kh560 and kh570 were selected as surface modification agents , and the concentration of them was 0 . 5 - 1 wt % , and ph value was controlled for 5 . 4 , and the best milled technology were 72 hours 本文第三部分，结合丙烯酸酷类单体，对sn一inz仇纳米微粒进行表面修饰研究，最后得出选用kh一560和kh一570作表面修饰剂，添加量为0 . 5一lwt %左右， ph值为5 . 4左右，采用球磨72小时，辅助超声分散工艺时， sn一in20 :纳米粉的分散性较好，且与基体有较好的相容性。
The a - transglucosidase was selectively modified by pcmb , me , edc , clac , acetyl acetone and nbs , and changes in the activities of the enzyme have been detected . the reaction of a - transglucosidase with pcmb , me , edc and clac resulted in a strong inhibition of the enzyme activities which decreased with the increase of modifier concentration . the acetyl acetone and nbs were found without inhibition effect 酚丙酮、小涅代唬拍酷亚胺刚b引等化学修饰剂对a葡萄糖转苦酶的几种氨基酸残基进行选择修饰，并测定其酶活力变化，结果表明： pcmb 、 me 、 edc 、 ciac能显著抑制酶的活性，活力的下降与修饰剂的浓度有关，乙酚丙酮、 nbs白巾饰对酶的夺制作用不明显。
