脾虚证大鼠模型的制备方法研究进展及评价

中医证候动物模型广泛应用到病证结合的实验研究中,动物模型的正确复制是实验能否成功以及结果是否客观科学的重要前提与关键因素。目前对于脾虚证造模的方法有单因素如药物致泻、劳倦过度、饮食不节、慢性束缚等,但绝大多数实验以复合因素进行干预造模。造模方法很多,但模型的稳定性、标准化仍值得研究,模型的评价缺乏统一的、客观的量化标准。

脾虚证动物模型造模方法述评

动物模型的正确复制是实验成功的前提和基础。目前中医脾虚证单因素造模方法有苦寒泻下法、饮食不节法、劳倦过度法、外湿困脾法、现代医学法;复合因素造模方法有劳倦过度合并饮食失节法、苦寒泻下合并饮食失节法、苦寒泻下合并劳倦过度法、外湿困脾合并饮食失节法、劳倦过度合并外湿困脾。虽然造模方法多样,但存在诸多问题,如造模方法分类不确切、每种造模方法所表现出症状的侧重点不同、复合因素造模方法所选用单因素的随机性大、动物种属不同所出现的症状不同、同一种属动物给予造模药物剂量差异大、给药持续时间差异大以及利用相同的造模方法国内外造出模型存在差异性等。

Research Progress of Palladium Catalysts for Methane Combustion

Recent research progress and development of the palladium catalysts for methane combustion are described in this study.The influence of active species,precursor,solvent,preparation methodologies,support and dopant on the catalytic activity and thermal stability of the palladium catalysts was discussed.Results of deactivation and poisoning of palladium catalysts were analyzed.Furthermore,possible kinetic models and reaction mechanism were indicated for Pd catalysts.

Resin Matrix/Fiber Reinforced Composite Material, Ⅱ: Method of Solution and Computer Code

According to a mathematical model which describes the curing process of composites constructed from continuous fiber-reinforced, thermosetting resin matrix prepreg materials, and the consolidation of the composites, the solution method to the model is made and a computer code is developed, which for flat-plate composites cured by a specified cure cycle, provides the variation of temperature distribution, the cure reaction process in the resin, the resin flow and fibers stress inside the composite, the void variation and the residual stress distribution.