目的 系统评价欧龙马口服滴剂治疗鼻窦炎的有效性与安全性.方法 采用计算机检索The Cochrane Library(2022年第4期),PubMed,Embase,SCI,中国知网(CNKI),万方数据知识服务平台(WanFang),中文科技期刊全文数据库(VIP),中国生物医学文献数据库(CBMdisc)中欧龙马口服滴剂治疗鼻窦炎的随机对照试验(RCT),检索时限为自建库起至...
Aromatic/aliphatic nitriles having the formula: Ar-A-CN (I) wherein Ar is phenyl or substituted phenyl and A is a direct chemical bond or a hydrocarbon having from 1 to 6 carbon atoms, are conveniently prepared by heating to a temperature ranging from about 450 DEG C. to about 550 DEG...
When the recording paper passes this separating charger 15, corona discharging is generated between the wire 15a and the recording paper, and the electric charge on the recording paper is destaticized by the current of this corona discharging, and the attracton between the recording paper and ...