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通过调解正硅酸乙酯(TEOS)和NH3·H2O的加入量, 采用共沉淀法可控地制备了一系列不同粒径(80~320 nm), 且具有规则孔道结构的介孔二氧化硅纳米材料(MSNs), 并利用小角X射线衍射(SAXRD)、 透射电镜(TEM)、 扫描电镜(SEM)及N2[KG-*3]吸附 脱附等方法对产物进行表征. 实验结果表明: 合成的样品均具有高度有序的孔道结构, 为典型的MCM 41介孔二氧化硅纳米材料; 采用合成后水热处理方法可提高材料的有序性和稳定性. 相似文献
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以不同浓度的Sutent作用于HeLa细胞,采用MTT法检测Sutent对HeLa细胞增殖的影响.流式细胞术检测Sutent对HeLa细胞周期的影响;Western免疫印迹检测不同浓度的Sutent对HeLa细胞中CDK4蛋白表达的变化;探讨苏尼替尼(Sutent)对HeLa细胞中CDK4的影响.结果表明Sutent能够抑制HeLa细胞的增殖,引起HeLa细胞发生G2期周期阻滞,并且呈浓度依赖性降低HeLa细胞中CDK4蛋白表达量.显示了Sutent作为多靶点药物在药物研发中具有潜在的重要的研究价值. 相似文献
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中空介孔二氧化硅纳米材料(HMSNs)的合成及其生物相容性 总被引:1,自引:0,他引:1
以CaCO3为模板合成中空介孔二氧化硅纳米材料(HMSNs), 并通过透射电镜(TEM)和小角X射线粉末衍射(SAXRD)对样品进行表征, 通过流式
细胞仪检测HMSNs样品对A549的细胞内吞能力及生物相容性. 结果表明: CaCO3 HMSNs是以CaCO3为核, 介孔二氧化硅为壳的纳米粒子; 当材料的质量浓度为62.5 μg/mL时, 细胞的存活率为100%; 有92.80%的细胞吸收了样品HMSNs, 即HMSNs具有较高的细胞内吞能力及生物相容性. 相似文献
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Take a digital libraries' service system for example, Objects Served Relationship Management (OSRM) in complex systems is proposed firstly as a new concept, and its connotation is explained. The significances and constructions of OSRM are analyzed. Both the fundamental facts and the important natures that the things which are interested by Objects Served (OS) (e. g. publishers and readers) and the server (e. g. digital libraries are the servers of publishers and readers) will not be the same completely although there are a lot of common benefits between OS and servers, are indeed clarified. The valuable information,which should be used by OS and their server, is often hidden behind them. Thus, how to find, manage and control the relationship among OS and their servers is very necessary and important for the common benefits among all of them.(e. g. the three dimensions of OSRM in digital library system and its overall framwork are proposed. The different strategies to different cases in the digital library's multidimensional framework are analyzed.) 相似文献
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采用共沉淀法合成高度有序、分散性良好的氨基化介孔二氧化硅纳米材料(Am-MSNs),并研究其吸附和保护质粒DNA(pDNA,PEGFP-N3)的性质,测定样品材料对A549和HeLa细胞的生物相容性.实验结果表明:Am-MSNs能有效吸附PEGFP-N3,并保护PEGFP-N3免受限制性内切酶的消化;Am-MSNs对A549和HeLa细胞表现出较高的生物相容性,当材料的质量浓度为125μg/mL时,两种细胞的存活率均约为100%. 相似文献
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