简介:目的采用经过改良的微弧氧化(MicroarcOxidation,MAO)工艺对纯钛材料进行表面处理,对所得到的材料进行细胞毒性试验.对MAO工艺处理的纯钛材料的生物学性能进行初步评价。材料与方法纯钛材料经过改良工艺条件的MAO处理后,按照GB/T16886的国家医疗器械生物学评价标准,选择1.929细胞系在标准材料浸提液环境下,在材料表面培养2、4、6天,与各对照组进行比较,对此种材料的细胞毒性进行评价。结果在各个时间点,MAO处理材料表面浸提液中的细胞增殖度及细胞生长状态与阴性对照和空白对照组之间没有统计学差异(p<0.05)。结论MAO工艺处理的纯钛材料表面没有溶出性细胞毒性.在体外细胞培养的环境下.有较好的细胞生物相容性。
简介:Dampingahybridsteppingmotorwithestimatedpositionandvelocity,Gridcurrentregulationofathree-phasevoltagesourceinverterwithanLCLinputfilter,TorsionalinteractionstudiesonpowersystemcompensatedbySSSCandfixedcapacitor,Amultivariablenewcontrolsolutionforincreasedlonglinesvoltagerestorationstabilityduringblackstartup,
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