道教医药巽卦除风秘方

巽为风。八卦中巽卦符号的产生，是古人在生产实践中，看到大雨来临之前，往往先有大风刮来，就在这山雨欲来风满楼的时候，天空中有着一层又一层厚厚实实的乌云在翻滚，云下又有着一股接一股的风在吹动，于是用“=”代表一层又一层的乌云．而以“--”代表那云层下一股又一股的风，     

化学吸收氧化法脱除恶臭气体的研究

城市污水处理厂的恶臭污染已经引起越来越多的关注.针对城市污水处理厂的主要恶臭气体,采用硫酸溶液和碱性氧化剂溶液作吸收剂,恶臭气体氨、硫化氢、甲硫醇通过二级吸收塔被吸收,气体达GB14554-93(二级)标准后排放.     

对词义引申关系的认识--从“除”字的各义项谈起

在《中华大字典》中“除”字义项众多,看起来纷繁复杂但实际上是个互有联系的严整系统,并非杂乱无章。为了能以简驭繁地掌握“除”的义项,本文将运用词义引申的规律以厘清“除”字词义引申之间的各种关系,以期对“除”字词义方面有一系统认识,也对词义引申有具体可感的认识。     

饮用水除氟技术研究进展

饮用水中氟超标严重危害人体健康,必须采取合适的方法对高氟饮用水进行降氟处理。本文简要地介绍了化学混凝沉降、离子交换、电化学、吸附、膜处理技术等主要的除氟技术及其特点,分析了其在饮用水领域应用的可行性,展望了未来饮用水除氟技术及除氟材料发展的方向。     

Microwave-assisted synthesis, anticonvulsant activity and quantum mechanical modelling of N-（4-bromo-3-methylphenyl） semicarbazones

Objective： To study the effect of halo substitution on disubstituted aryl semicarbazones on the anticonvulsant potential and model the activity based on quantum mechanics. Methods： A series of twenty-six compounds of N^4-（4-bromo-3-methylphenyl） semicarbazones were synthesized and evaluated for the anticonvulsant activity in the maximal electroshock seizure （MES） and subcutaneous pentylenetetrazole （scPTZ） seizure threshold tests. Some potential compounds were also tested in the subcutaneous strychnine （scSTY） and subcutaneous picrotoxin （scPIC） seizure threshold tests. The synthesized compounds were tested for behavioral impairment and CNS （central nervous system） depression in mice. Quantum mechanical modelling was carried out on these compounds to gain understanding on the structural features essential for activity. Results： Some compounds possessed broad spectrum anticonvulsant activity as indicated by their effect in pentylenetetrazole, strychnine, picrotoxin and maximal electroshock seizures models in resemblance to other aryl semicarbazone derivatives reported earlier. The higher the difference in HOMO （highest occupied molecular orbital） and LUMO （lowest unoccupied molecular orbital） energy levels was, the greater was the activity profile. Conclusion： The pharmacophoric requirements for compounds to exhibit anticonvulsant activity that includes one aryl unit in proximity to a hydrogen donor-acceptor domain and an electron donor have been justified with the molecular orbital surface analysis of the synthesized compounds.     

银氨溶液呈碱性的探究

从实验测定数据、理论分析对"银氨溶液显碱性"进行了分析和探究,并详细阐述了银氨溶液氧化乙醛的反应机理及本质特征.     

由学生的错题想到的教材改造

因一次课堂观察的需要,笔者和一位小学教师一起作了一项教学前测,使用的教材是人教版义务教育课程标准实验教科书小学数学,内容为六年级上册第一节《分数除法》。前测试题中有一个问题：