[Objectives] To study characteristic fingerprint spectra of fruits( its stones were removed) and leaves of Prunus mume collected at various altitudes in differe
固井施工是对套管进行加固,在套管外和井壁之间形成稳固水泥环的施工工艺,属于一次性的施工过程,一旦失误很难补救。因此对固井施工质量的控制和管理显得尤为重要,只有不断提高固
锅炉水处理是防止锅炉结垢、腐蚀,保持蒸汽品质良好的重要措施。对于小型工业锅炉,水处理的首要问题是防止锅炉结垢,水处理的任务就是根椐原水特性和锅炉特性采用有效的水处
[Objectives] To study the acute toxicity,mutation,and feeding experiment of polysaccharides from Dicliptera chinensis( L.)Juss.,and assess its safety. [Methods]
随着时代的发展,防爆起重机引起了各方的高度重视,在电厂以及军工企业中均有所应用,这些场所具有一定危险性,存在爆炸性气体,当其与明火相遇时,会出现爆炸现象,引发伤亡事故,带来严重的财产与不可挽回的生命伤害。笔者将围绕防爆起重机展开探讨,希望可为实践活动的开展提供参考。
机械设计自动化的发展是人类历史的一大进步,机械自古就有,人们用机械来代替人工劳动力、提高社会生产力,而机械设计自动化又将机械的性能进行了大大提高,使其更好地发挥出自
[Objectives]To determine the content of oleanolic acid in 10 batches of Achyranthes aspera L.from different production areas,and to establish a high performance
[Objectives] To establish fingerprint chromatogram of Tetracera asiatica and provide basis for controlling and assessing the quality of Tetracera asiatica.[Meth
[Objectives]To study the protective effects and mechanism of POLYGONI PERFOLIATI HERBA on rats with nonalcoholic steatohepatitis(NASH).[Methods]Sixty rats were