未足月胎膜早破(preterm premature rupure of membranes,PPROM)发病机制十分复杂,生殖道感染是其中原因之一。PPROM的处理包括期待疗法及终止妊娠,选择何种处理方法与妊娠周数、胎儿成熟度、羊膜腔感染及破膜引起的母婴并发症有关,也...未足月胎膜早破(preterm premature rupure of membranes,PPROM)发病机制十分复杂,生殖道感染是其中原因之一。PPROM的处理包括期待疗法及终止妊娠,选择何种处理方法与妊娠周数、胎儿成熟度、羊膜腔感染及破膜引起的母婴并发症有关,也与本地区新生儿科的治疗水平关系密切。期待疗法有预防感染、抑制宫缩、促进胎肺成熟三大传统方法和较新的羊膜腔灌注术及羊膜腔封闭疗法。当临产不可避免时,需根据孕周、破膜时间、胎儿情况等综合因素选择分娩方式。展开更多
To investigate the effects of Al-Ti-B-RE grain refiner on microstructure and mechanical properties of Al-7.0Si-0.55Mg （A357） alloy, some novel Al-7.0Si-0.55Mg alloys added with different amount of Al-STi-1B-RE grain...To investigate the effects of Al-Ti-B-RE grain refiner on microstructure and mechanical properties of Al-7.0Si-0.55Mg （A357） alloy, some novel Al-7.0Si-0.55Mg alloys added with different amount of Al-STi-1B-RE grain refiner with different RE composition were prepared by vacuum-melting. The microstructure and fracture behavior of the AI-7.0Si-0.55Mg alloys with the grain refiners were observed by X-ray diffraction （XRD）, optical microscopy （OM）, scanning electron microscopy （SEM）, and the mechanical properties of the alloys were tested in mechanical testing machine at room temperature. The observation of AI-Ti-B-RE morphology and internal structure of the particles reveals that it exhibits a TiAl3/Ti2Al20RE core-shell structure via heterogeneous TiB2 nuclei. The tensile strength of Al-7.0Si-0.55Mg alloys with Al-5Ti-1B-3.0RE grain refiner reaches the peak value at the same addition （0.2%） of grain refiner.展开更多
目的系统评价复方丹参注射液辅助治疗过敏性紫癜的临床疗效及安全性。方法计算机检索PubMed、WEB of SCIENCE、The Cochrane Library、CNKI、VIP、WanFangData,收集所有关于复方丹参注射液治疗过敏性紫癜的随机对照试验,检索时限为建库...目的系统评价复方丹参注射液辅助治疗过敏性紫癜的临床疗效及安全性。方法计算机检索PubMed、WEB of SCIENCE、The Cochrane Library、CNKI、VIP、WanFangData,收集所有关于复方丹参注射液治疗过敏性紫癜的随机对照试验,检索时限为建库至2016年11月30日。两位研究者按纳入与排除标准筛选文献、提取资料,按Cochrane系统评价的方法评价纳入研究的质量,采用RevMan 5.3软件进行Meta分析。结果共纳入10项随机对照试验,共计768例患儿。结果显示,复方丹参注射液辅助治疗过敏性紫癜在总有效率、皮疹消退时间、关节症状缓解时间及消化道症状缓解时间等方面均优于常规治疗组,差异有统计学意义(P<0.05)。未报道复方丹参注射液治疗过敏性紫癜的严重不良反应。结论复方丹参注射液辅助治疗小儿过敏性紫癜疗效确切,无明显不良反应,值得临床推广。但纳入研究的文献质量低,其疗效需要高质量临床试验来验证。展开更多
文摘未足月胎膜早破(preterm premature rupure of membranes,PPROM)发病机制十分复杂,生殖道感染是其中原因之一。PPROM的处理包括期待疗法及终止妊娠,选择何种处理方法与妊娠周数、胎儿成熟度、羊膜腔感染及破膜引起的母婴并发症有关,也与本地区新生儿科的治疗水平关系密切。期待疗法有预防感染、抑制宫缩、促进胎肺成熟三大传统方法和较新的羊膜腔灌注术及羊膜腔封闭疗法。当临产不可避免时,需根据孕周、破膜时间、胎儿情况等综合因素选择分娩方式。
基金Project(2012CB619503)supported by the Natioanl Basic Research Program of ChinaProject(2013AA031001)supported by the National High-tech Research and Development Program of ChinaProject(2012DFA50630)supported by the International Science&Technology Cooperation Program of China
文摘To investigate the effects of Al-Ti-B-RE grain refiner on microstructure and mechanical properties of Al-7.0Si-0.55Mg （A357） alloy, some novel Al-7.0Si-0.55Mg alloys added with different amount of Al-STi-1B-RE grain refiner with different RE composition were prepared by vacuum-melting. The microstructure and fracture behavior of the AI-7.0Si-0.55Mg alloys with the grain refiners were observed by X-ray diffraction （XRD）, optical microscopy （OM）, scanning electron microscopy （SEM）, and the mechanical properties of the alloys were tested in mechanical testing machine at room temperature. The observation of AI-Ti-B-RE morphology and internal structure of the particles reveals that it exhibits a TiAl3/Ti2Al20RE core-shell structure via heterogeneous TiB2 nuclei. The tensile strength of Al-7.0Si-0.55Mg alloys with Al-5Ti-1B-3.0RE grain refiner reaches the peak value at the same addition （0.2%） of grain refiner.
