苯乙烯/丙烯酸正丁酯/丙烯酸共聚微球的制备及其性能表征

通过乳液聚合法和无皂乳液聚合法制备了苯乙烯／丙烯酸正丁酯／丙烯酸共聚微球。讨论了乳化剂用量、引发剂用量、功能单体、软硬单体用量比等对微球粒径和形态的影响。利用扫描电子显微镜（SEM）、傅立叶变换红外光谱仪（FTIR）对微球的粒径、形貌和表面基团进行分析。红外光谱表明，实验室所制备的苯乙烯／丙烯酸正丁酯／丙烯酸共聚微球表面存在丰富的羧基。利用竖片生长法得到自组装的多层胶体微球薄膜。通过对薄膜的反射光谱测量，发现随着湿度的增加，峰位会产生3nm左右的红移

Preparation and Characterization of Poly (styrene/n-butyl acrylate/acrylic acid) Microspheres

通过乳液聚合法和无皂乳液聚合法制备了苯乙烯/丙烯酸正丁酯/丙烯酸共聚微球.讨论了乳化剂用量、引发剂用量、功能单体、软硬单体用量比等对微球粒径和形态的影响.利用扫描电子显微镜(SEM)、傅立叶变换红外光谱仪(FTIR)对微球的粒径、形貌和表面基团进行分析.红外光谱表明,实验室所制备的苯乙烯/丙烯酸正丁酯/丙烯酸共聚微球表面存在丰富的羧基.利用竖片生长法得到自组装的多层胶体微球薄膜.通过对薄膜的反射光谱测量,发现随着湿度的增加,峰位会产生3nm左右的红移

鼻咽癌染色体3p14的精细等位基因缺失分析(英文)

目的 进一步明确鼻咽癌染色体３ｐ１４区域等位基因杂合性丢失（ｌｏｓｓ ｏｆ ｈｅｔｅｒｏｚｙｇｏｓｉｔｙ，ＬＯＨ）的频率与共同缺失区范围，以便分离该区域内与鼻咽癌相关的候选抑瘤基因。方法 选择位于３ｐ１４的６个高密度微卫星多态标记，对３２例鼻咽癌组织进行ＬＯＨ分析。结果 ７１．８８％（２３／３２）的鼻咽癌在至少１个位点发生ＬＯＨ，丢失频率较高的３个位点是Ｄ３Ｓ１３１３（４６．４３％）、Ｄ３Ｓ１３００（５０．０％）和Ｄ３Ｓ１３１２（４４．４４％）。在存在丢失的２３例患者中，８例表现为一个连续的非随机的ＬＯＨ区域，其最小共同缺失区为Ｄ３Ｓ１３１３～Ｄ３Ｓ１３１２（约３．４个厘摩）。且该区域的缺失与鼻咽癌临床分期、ＥＢ病毒感染有明显关系。结论 鼻咽癌在３ｐ１４的最小共同缺失区位于Ｄ３Ｓ１３１３～Ｄ３Ｓ１３１２之间，该区域可能存在一个尚未克隆的与鼻咽癌发生发展密切相关的抑瘤基因

The Key Factors In Fabrication Of High-Quality Ordered Macroporous Copper Film

The template-directed fabrication of highly-ordered porous film is of significant importance in implementation of the photonic band gap structure. The paper reports a simple and effective method to improve the electrodeposition of metal porous film by utilizing highly-ordered polystyrene spheres (PSs) template. By surface-modification method, the hydrophobic property of the PSs template surfaces was changed into hydrophilic one. It was demonstrated that the surface modi. cation process enhanced the permeability of the electrolyte solution in the nanometer-sized voids of the colloidal template. The homogeneously deposited copper film with the highly-ordered voids in size of less than 500 nm was successfully obtained. In addition, it was found that large defects, such as microcracks in the template, strongly influenced the macroporous films quality. An obvious preferential growth in the cracked area was observed. (C) 2008 Elsevier B. V. All rights reserved