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文章简介了由双乙烯酮衍生的5-乙酰基乙酰氨基苯并咪唑酮的合成工艺。全面系统的介绍了由5-乙酰基乙酰氨基苯并咪唑酮作为偶合组分和一些芳胺或取代芳胺化合物的重氮物进行偶合反应,制备一系列黄色橙色的有机颜料。这些有机颜料性能非常优异,具有很高的对光和热的稳定性以及较高的耐溶剂性和耐迁移性,色泽非常坚牢,广泛用于塑料、高档涂料及油墨。 相似文献
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残采区开采, 每个矿井特别是老矿井都会遇到。文章在分析残采区开采特点的基础上, 论述了残采区开采的采煤方法、巷道布置、设备选型等开采技术问题。通过现场试验, 运用轻型支架放顶煤开采技术, 实现了厚煤层残采区开采的高效机械化。 相似文献
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介绍了压力平衡风门的结构性能,主要特点,从力学角度人析了该风门的工作原理,并提出了改进意见和建议。 相似文献
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In order to improve the cancer-targeting and selective activity of antineoplastic agent [5-fluorouracil (5-FU)], a novel pH-responsive drug delivery system [pullulan acetate/sulfonamide (PA/SDM) conjugate] was synthesized by a diafiltration method. Sulfonamide was grafted to the hydrophobicaUy modified pullulan acetate to enhance the pH sensitivity for better cancer-targeting delivery. 5-FU was loaded into the self-assembled nanoparticles by the same method. The drug-loaded self-assembled nanoparticles were successfully obtained and characterized in terms of particle size, morphology and drug loading and release profile at various pHs. The results showed that the mean diameter of the self-assembled particles was approximately 100nm, with uniform size and good spherical morphology. The nanoparticles showed good stability at pH 7.4, which is equal to that of the normal body fluid, but shrank and aggregated below pH 6.8, which is close to the pH with tumors. The loading efficiency and concentration of released 5-FU was monitored at 269 nm on the UVNis spectrophotometer. The release profile was heavily pH-dependent around phvsiological pH, and the release rate was significantly enhanced under pH of 6.8. 相似文献
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文章简介了由双乙烯酮衍生的5-乙酰基乙酰氨基苯并咪唑酮的合成工艺。全面系统的介绍了由5-乙酰基乙酰氨基苯并咪唑酮作为偶合组分和一些芳胺或取代芳胺化合物的重氮物进行偶合反应,制备一系列黄色橙色的有机颜料。这些有机颜料性能非常优异,具有很高的对光和热的稳定性以及较高的耐溶剂性和耐迁移性,色泽非常坚牢,广泛用于塑料、高档涂料及油墨。 相似文献
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将现代计算机测试技术与人工智能领域中的专家系统技术结合在一起,研制开发了跳汰机智能诊断监测系统。介绍了该系统软件部分的内容和功能,并着重讨论了当前数据、查询评估、动态显示、知识库及解释功能等各部分的实现策略。 相似文献