75KA预焙阳极电解槽二次启动实践

由于受电力供应不足、设备大修、事故等因素的影响，铝电解系列或部分电解槽的二次启动在铝电解生产中是难免的。2005年10月，由于突降暴雨，山西龙门铝业有限公司2撑、3撑主变相继发生接地事故而停运。     

Preparation of Magnetic Fluorescent Dual-drug Nanocomposites for Codelivery of Kaempferol and Paclitaxel

Magnetic fluorescent dual-drug nanocomposites(MFDDs) were developed with the aim of simultaneouly delivering two different anticancer drugs, kaempferol(KAE) and paclitaxel(PTX). Firstly, Fe_3O_4/bovine serum albumin(Fe_3O_4/BSA) composite microspheres with physically entrapped KAE were prepared, then microspheres were modified with PTX/graphene quantum dots(PTX/GQDs) through chemically bonding, and the MFDDs were obtained. The properties of nancomposites were characterized by X-ray diffractometry, Fourier-transform infrared spectroscopy, transmission electron microscopy, vibrating sample magnetometry and X-ray fluorescence spectrometry. It was found that the superparamagnetic nanocomposites had ultrafine size(below 110 nm), high saturation magnetization of 24.36 emu/g, and significant fluorescence. Furthermore, the cumulative in vitro release of the MFDDs exhibited controlled drug release. Cell viability experiments confirmed that the co-administration of KAE with PTX had a superior cytotoxicity to the Hela cells compared with single drug-loaded forms. Therefore, dual anticancer drug-loaded MFDDs have the potential to be used for cancer combined chemotherapy.     

钢管混凝土柱的设计

钢管混凝土结构具有承载能力强、造价低、施工简便快捷等特点。本文结合工程实例，介绍工程中常用的单肢钢管混凝土柱的设计要点。     

给水管网遗传优化设计中惩罚系数的确定

针对应用遗传算法进行给水管网优化设计中惩罚系数难以确定的问题,提出了一种应用给水管网技术经济参数来计算惩罚系数的新方法。数值模拟结果表明,采用该方法计算惩罚系数是可行的,能以较高的概率搜索到最优解,减小了确定惩罚系数的随意性和盲目性,提高了遗传算法的进化效率和收敛性,对于工程优化设计具有一定的参考价值。     

磁性活性碳负载F掺杂纳米二氧化钛的光催化性质研究

通过溶胶-凝胶法制备F掺杂纳米TiO₂ (F-TiO₂), 将其负载到磁性活性碳(MAC)上, 制得易回收分离的高效催化剂(F-TMAC)。通过XRD、SEM、UV-Vis、XPS、VSM对样品进行表征。以合成样品为催化剂降解模拟废水活性染料艳红(X-3B), 结果表明该负载型催化剂在紫外光和可见光照射下光催化效果均优于P25催化剂。0.2 g负载型催化剂分别在紫外光和可见光照射下降解200 mL浓度为100 mg/L的X-3B溶液, 90 min后经18?W紫外光照射X-3B去除率达到99.8%; 250 W可见光照射X-3B去除率为83.1%。溶液中的复合催化剂可以用磁铁很容易分离, 具有优良的重复利用性能。经5次重复试验, 复合催化剂F-TMAC对X-3B的降解率仅下降了约6.0%。     

Preparation and characterization of superparamagnetic Fe<Subscript>3</Subscript>O<Subscript>4</Subscript>/CNTs nanocomposites dual-drug carrier

Fe₃O₄/carbon nanotubes (Fe₃O₄/CNTs) nanocomposites were prepared by polylol high-temperature decomposition of the precursor ferric chloride and CNTs in liquid triethylene glycol. After surface modification with hexanediamine, folate was covalently linked to the amine group of magnetic Fe₃O₄/CNTs nanocomposites. The products were characterized by Fourier-transform infrared spectroscopy, transmission electron microscopy, and vibrating sample magnetometry. Then Fe₃O₄/CNTs were used as a dual-drug carrier to co-delivery of the hydrophilic drug epirubicin hydrochloride and hydrophobic drug paclitaxel. The results indicated that the Fe₃O₄/CNTs had a favorable release property for epirubicin and paclitaxel, and thus had potential application in tumor-targeted combination chemotherapy.     

用于软骨修复的纳米纤维研究进展

在软骨组织修复与再生中,纳米纤维为细胞提供了良好的微环境,是软骨渗复的一种理想材料.首先介绍了纳米纤维的制备方法,包括相分离、电纺和自组装,特别针对新结构和新性能的纳米纤维的研究进展展开了论述.最后介绍了软骨细胞、干细胞与纳米纤维的复合以及生物活性因子如生长因子、基因对软骨再生的促进作用.     

水煤气回收烟气的试验与分析

探讨了水煤气回收烟气掺混LPG作为居民用气试验的可行性,阐述了试验方案,分析了试验结果。通过试验与分析,发现适当降低水煤气发生炉炉温与煤层厚度,有利于控制回收烟气中O2及CO的体积分数。