Beyond the traditional focus on improvements in mechanical, electronic and absorption properties, controllability, actuation, and dynamic response of monoliths have received increasing attentions for practical applica...Beyond the traditional focus on improvements in mechanical, electronic and absorption properties, controllability, actuation, and dynamic response of monoliths have received increasing attentions for practical applications. However, most of them could only realize simple response to constant conditions(e.g. a stationary magnetic field) while carrying out humdrum motions. By controlling distribution of metal organic framework obtained carbon-enriched Fe304 nanoparticles in self-assembly reduced graphene oxide(RGO) monoliths, we could achieve two distinctive RGO-Fe_3 O_4 stirrers that could dynamically respond to the rapidly changing magnetic field while executing designed movements precisely: rotating with lying down posture or standing straight posture. These stirrers can not only be applied in environmental remediation(e.g.suction skimmer), but also be recycled as electrode active materials for supercapacitors after fulfilling their destiny, realizing transformation of trash to treasure, which will inspire other dynamically responsive monoliths for various applications.展开更多
目的:观察不同牵张力下减阻牵张快速牙移动中BMP-2的表达。方法:Beagle犬12只,随机均分为加力5、15 d、加力15 d保持固定10、90 d 4组。以■为移动牙每个组3只犬的6颗移动牙随机采用减阻—牵张方法、减阻-常规方法和常规方法各2颗。各...目的:观察不同牵张力下减阻牵张快速牙移动中BMP-2的表达。方法:Beagle犬12只,随机均分为加力5、15 d、加力15 d保持固定10、90 d 4组。以■为移动牙每个组3只犬的6颗移动牙随机采用减阻—牵张方法、减阻-常规方法和常规方法各2颗。各组犬按预定时间处死并获取移动牙牙周组织块,免疫组化法染色并观察BMP-2表达。结果:各加力方式下BMP-2阳性表达分布区域相似,均在加力结束时达峰值,其中减阻牵张组峰值最大(P<0.05);牙移动距离最大(P<0.01)。加力各时间点,减阻常规组BMP-2阳性表达均强于常规方法组但不及减阻牵张组显著;保持固定90 d,3组无差异(P>0.05)。结论:减阻措施配合持续强牵张力可显著提高移动牙牵张新骨区BMP-2阳性表达加速牙周组织新骨形成。展开更多
基金supported by Natural Science Foundation of SZU (Grant No. 2017004)Early Career Scheme of the Research Grants Council of Hong Kong SAR, China, under the Project No. CityU 109213a Grant from the City University of Hong Kong (9610372)
文摘Beyond the traditional focus on improvements in mechanical, electronic and absorption properties, controllability, actuation, and dynamic response of monoliths have received increasing attentions for practical applications. However, most of them could only realize simple response to constant conditions(e.g. a stationary magnetic field) while carrying out humdrum motions. By controlling distribution of metal organic framework obtained carbon-enriched Fe304 nanoparticles in self-assembly reduced graphene oxide(RGO) monoliths, we could achieve two distinctive RGO-Fe_3 O_4 stirrers that could dynamically respond to the rapidly changing magnetic field while executing designed movements precisely: rotating with lying down posture or standing straight posture. These stirrers can not only be applied in environmental remediation(e.g.suction skimmer), but also be recycled as electrode active materials for supercapacitors after fulfilling their destiny, realizing transformation of trash to treasure, which will inspire other dynamically responsive monoliths for various applications.
