In this article,MnFe2O4 nanocrystals were synthesized by coprecipitation at low temperature,and the effects of temperature,time and additive on crystallization and particle sizes of samples were also studied.In additi...In this article,MnFe2O4 nanocrystals were synthesized by coprecipitation at low temperature,and the effects of temperature,time and additive on crystallization and particle sizes of samples were also studied.In addition,the samples prepared by the method were characterized by XRD,TEM and VSM,respectively.展开更多
The nanometer cobalt blue pigments were prepared by microemulsion method. Using dynamic light scattering(DLS) test method, the influences of water content on the size of liquid drop of microemulsion and the liquid dro...The nanometer cobalt blue pigments were prepared by microemulsion method. Using dynamic light scattering(DLS) test method, the influences of water content on the size of liquid drop of microemulsion and the liquid drop of microemulsion on the final diameter of nanometer particle were studied in the course of preparation. Accordingly, the method to control the diameter of nanometer particle by changing water content was established. The nanometer cobalt blue particles were confirmed by XRD and TEM. Color parameters of pigments were determined. The quantum size effect of the pigments was discussed.展开更多
文摘本文使用低分子肝素(Fragmin)作为抗凝剂一次性给药进行血液透析.观察了26例患者294次血液透析的疗效。结果显示,使用 Fragmin 抗凝时,透析器重复使用平均4.5次,未见明显透析器内及透析管路凝血;用药前后凝血酶原时间、凝血酶原活动度、部分凝血活酶时间、血红蛋白、血小板计数无明显变化(P>0.05);每次用药前后血浆抗因子 Xa 活性变化显著(P<0.001);未发现严重出血病例。本文的结论是透析开始时,一次性给予 Fragmin 行 HD 抗凝,安全有效、简单方便。
文摘In this article,MnFe2O4 nanocrystals were synthesized by coprecipitation at low temperature,and the effects of temperature,time and additive on crystallization and particle sizes of samples were also studied.In addition,the samples prepared by the method were characterized by XRD,TEM and VSM,respectively.
文摘The nanometer cobalt blue pigments were prepared by microemulsion method. Using dynamic light scattering(DLS) test method, the influences of water content on the size of liquid drop of microemulsion and the liquid drop of microemulsion on the final diameter of nanometer particle were studied in the course of preparation. Accordingly, the method to control the diameter of nanometer particle by changing water content was established. The nanometer cobalt blue particles were confirmed by XRD and TEM. Color parameters of pigments were determined. The quantum size effect of the pigments was discussed.
