排序方式: 共有17条查询结果,搜索用时 31 毫秒
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目的以聚乳酸-羟基乙酸共聚物(PLGA)为载体,制备扑热息痛贮库式缓释体系,研究其体外释药性能。方法用微机电技术制备扑热息痛多腔体贮库式植入剂,采用高效液相色谱法检测药物的释放性能。本实验采用C18色谱柱,以甲醇-水(15:85)为流动相,检测波长为215nm,流速为0.8mL/min。结果载体形状不同,体外药物释放速率具有明显差异,外方内六边形扑热息痛植入剂缓释曲线符合Higuchi方程。结论扑热息痛多腔体贮库式植入剂制备工艺可行,载体的腔体形状对体外药物释放速度有较大影响。 相似文献
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To understand the complex meanings of mobility and to engage in transport planning and management processes, a variety of disciplines, skills, and tools are potentially useful. Universities have a limited amount of time and resources to train future professionals though. This poses a problem: where should the teaching priorities be? By means of a web-survey, this study has asked academics based at a number of universities what the disciplines, skills, and tools that — according to their personal viewpoints — are the most relevant for practitioners in the mobility and transport sector. The respondents generally support curricula that facilitate a holistic, non-specialised, understanding of mobility and transport issues. 相似文献
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青岛港(董家口港区)疏港铁路规划研究 总被引:2,自引:1,他引:1
研究目的:铁路作为港口的集疏运系统的重要组成部分,其布局与港口作业效率密切相关。鉴于董家口港区详规刚刚起步,为统筹优化港口布局规划,减少不必要的废弃工程,并为港口及临港工业区发展留有余地,特开展了青岛港(董家口港区)疏港铁路规划研究。研究结论:董家口港区内部可考虑设置港湾站、港前站、物流中心站,其中港湾站至港前站是疏港的主要通路。外部通路可选择青连铁路、山西中南部铁路。由于这两条铁路均为拟建项目,外部集疏运通路选择与两条线建设时机密切相关。若两线同时建设,可考虑首选青连铁路,再视港口和临港产业区发展情况,适时考虑与山西中南部铁路联通。 相似文献
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There is broad and growing consensus regarding the central place of integrated Land Use and Transport (LUT) strategy development
in establishing more efficient and sustainable urban environments. However, empirical evidence shows that such integration
is hard to achieve in daily planning practice, due to many institutional barriers and substantive differences. More specifically,
the tools developed to support LUT strategy development have very low implementation rates in daily planning practice. This
paper introduces the concept of ‘knowledge generation’ as a potentially useful mechanism for closing the gap between support
tools and planning practice. Through two specific Dutch planning cases, we analyze the applicability of this concept in supporting
integrated LUT strategy development. The paper focuses on the developed strategies, how these differ from current practice,
and how knowledge generation supported their development. We argue that socialization produces shared strategies and that
effective socialization needs to be supported by efficient mutual exchange between tacit and explicit knowledge. We conclude
by discussing the implications of this argument for the wider practice of LUT planning integration. 相似文献
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论述基于无线短消息通信方式(GSM)的地铁隧道水位检测控制系统的设计原理,以及测量端与控制端的硬件、软件系统构成及设计.通过下位机的水位检测模块,采集处理地铁隧道的水位信息:通过GSM短信数据传输模块,将信息传到上位机的监控端.监控系统完成测量数据分析、统计储存,并对监测地点的渗水进行排放. 相似文献
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