蒙脱土改性聚丙烯共混体系的可纺性及染色性研究

用X-射线衍射仪研究了蒙脱土在聚丙烯中的插层情况;对蒙脱土改性聚丙烯的多组分共混体系的可纺性及染色性作了比较。结果表明,聚丙烯/马来酸酐接枝聚丙烯/有机蒙脱土复合材料的质量分数组成为78.5％/13.5％/1.5％,加入质量分数为6.5％聚酯离聚物的共混体系具有较好的可纺性,且蒙脱土与聚酯离聚物对聚丙烯纤维的染色性改善具有协同作用,较聚丙烯/聚酯离聚物体系的染色性更好。

^(nat)W(p,xn)^(181-186)Re反应的激发函数

使用叠靶技术测量了２２．５ＭｅＶ的质子照射天然钨时生成^（１８１）Ｒｅ、^（１８２）Ｒｅ~ｍ、^（１８２）Ｒｅ~ｇ、^（１８３）Ｒｅ、^（１８４）Ｒｅ~ｍ、^（１８４）Ｒｅ~ｇ和^（１８６）Ｒｅ的激发函数。估算了^（１８６）Ｗ（ｐ，ｎ）^（１８６）Ｒｅ反应生产用于治疗的放射性核素^（１８６）Ｒｅ的厚靶产额，并与^（１８６）Ｗ（ｄ，２ｎ）^（１８６）Ｒｅ反应的有关数据进行了比较。

靶向治疗用Fe304及其白蛋包被磁性纳米粒子的制备

目的 制备用于肿瘤靶向治疗的Fe3 O4及其白蛋白包被的磁性纳米粒子。方法 采用部分还原法制备Fe3 O4纳米粒子 ,通过微乳化方法制备了白蛋白包被的Fe3 O4磁性纳米颗粒。结果 Fe3 O4粒径为 10nm左右 ,X -射线粉末衍射分析显示Fe3 O4纳米磁性微粒是典型的尖晶石构型 ;白蛋白包被的磁性纳米粒子直径在 2 0 0nm左右。结论 Fe3

肿瘤靶向治疗用白蛋白磁性纳米粒子的188铼(188Re)标记

目的 188铼 ( 188Re)标记用于肿瘤靶向治疗的白蛋白磁纳米体的实验室条件。方法 188Re标记白蛋白磁性纳米体的最佳实验室条件是 :SnCl2 ·H2 O 8mg/ml,柠檬酸 2 0mg/ml,维生素C 8mg/ml,反应容积为 5 0 0 μl ,反应时间为 3h。结果 188Re总的标记率大于 90 % ,标记稳定性 7h为 98%、2 4h为 95 %。结论 188Re-白蛋白磁性纳米体的标记率及标记稳定性适于用于肿瘤靶向治疗的体内研究。

基于GPS技术的天津某园区地籍测量技术研究

本文基于笔者多年从事地籍测量的相关工作经验,以天津某园区地籍数字测量为研究背景,论文首先概要分析了GPS测量技术要素,进而探讨了平面控制测量的技术思路方法及图根控制测量的具体实施流程,包括如何进行GPS静态数据处理及平差精度分析等。

Rheological Properties of Soy Protein Isolate and Polyurethane in the PAN/DMSO Solution

The rheological properties of soy protein isolate （SPI） and polyurethane （PU） in the PAN/DMSO solution were investigated in this study. The results showed that all these solutions possessed pseudo-plastic solution properties. There are opposite effects of SPI and PU in the PAN/DMSO solution. Their apparent viscosity, degree of non-Newtonian fluid, and extent of structuralization of blend system increase with the addition of SPI, whereas, all of these decrease with the addition of PU. Moreover, the theological properties of PAN/DMSO solution were affected when SPI and PU were added equally, and SPI presented more effect when the proportion of ingredient was less, and PU presented more effect when the proportion of ingredient was more.

Solution Properties of Soy Protein in DMSO/Urea Solvent System

Solution properties of 7S globulins (7S), 11S globulins (11S) and soy protein isolates (SPI) in dimethylsulfoxide (DMSO)/urea solvent system were studied by intrinsic viscosity and particle size distributions. The results showed that the existence of urea was the main reason for the denaturation and solubility of soy protein in the system, and the effects were more obvious with increasing of urea concentration in solutions. Suitably dissolution temperature and time contributed to the solubility of soy proteins.

DXF格式数字地形图坐标转换软件开发研究

DXF格式文件是CAD图形开发中最常用的图形交换格式之一,由于其便于读写操作的特点,逐渐发展成为一种国际通用图形格式。分析研究了DXF文件中实体数据存储规则,然后选用C#语言实现了脱离CAD环境,直接操作DXF文件,从而完成图件坐标转换的功能。最后结合具体的工程实例验证了软件的正确性。